KR20180120999A - Hierarchical type power control system - Google Patents

Abstract

The present invention relates to a hierarchical power control system. In a hierarchical power control system connected to a cloud server, the hierarchical power control system according to an embodiment of the present invention includes: a first microgrid cell including a first energy storage system (ESS) with an uninterruptible power supply (UPS) structure and a first load whose power state is managed by the first ESS; a second microgrid cell including a second load and a second ESS which manages the power state of the second load; a third microgrid cell including a third load; a middleware server for communicating with the first to third microgrid cells; and an integrated control system for communicating with the middleware server and integrating and controlling the power supply and demand states of the first to third microgrid cells. A connection between the first microgrid cell and the second microgrid cell is opened and closed through a conversion switch. Accordingly, the present invention can solve power supply and demand problems.

Description

[0001] HIERARCHICAL TYPE POWER CONTROL SYSTEM [0002]

The present invention relates to a hierarchical power control system.

Energy Storage System is a system that stores generated power in each link system including power plant, substation and transmission line, and then uses energy selectively and efficiently at necessary time to enhance energy efficiency.

The energy storage system can reduce the power generation cost when the overall load ratio is improved by leveling the electric load with large time and seasonal variation, and it is possible to reduce the investment cost and the operation cost required for the electric power facility expansion, can do.

These energy storage systems are installed in power generation, transmission, distribution, and customer in power system. Frequency regulation, generator output stabilization using peak energy, peak shaving, load leveling, , And emergency power supply.

Energy storage systems are divided into physical energy storage and chemical energy storage depending on the storage method. Physical energy storage includes pumped storage, compressed air storage, and flywheel. Chemical storage includes lithium ion batteries, lead acid batteries, and Nas batteries.

However, this energy storage system can manage only the power state of a building (for example, a microgrid unit) or a building in which it is directly managed, Considering the supply and demand situation, we could not help the power shortage problem in the adjacent area or building.

Especially, in the case of a systematic accident, a certain area or building is able to supply electricity independently, leaving spare power, while other areas or buildings have difficulties due to power shortage.

In order to solve these problems, there is a need for a system that can efficiently manage the power of adjacent microgrid unit areas.

An object of the present invention is to provide a hierarchical power control system capable of efficiently controlling the power supply / demand state of adjacent microgrid cells.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description and more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to an aspect of the present invention, there is provided a hierarchical power control system connected to a cloud server, the system including a first ESS (Energy Storage System) having an uninterruptible power supply (UPS) A second micro grid cell including a first micro grid cell including a first load that is managed by a first ESS and a first load that is managed by a first ESS, a second ESS that manages power states of a second load and a second load, A third middle grid server communicating with the first through third micro grid cells, and a middleware server communicating with the first through third micro grid cells, The first micro-grid cell and the second micro-grid cell are opened and closed through a changeover switch.

The first microgrid cell further comprises a first sensor for sensing a power state of the first load and the second microgrid cell further comprises a second sensor for sensing a power state of the second load, The cell further includes a third sensor for sensing a power state of the third load, wherein each of the first to third sensors senses a power state of each of the first to third loads and transmits the power state to the cloud server.

The cloud server receives the weather data and the power-related data from the outside, collects and analyzes the power states of the first to third loads provided from the first to third sensors, and the climate data and the power-related data provided from the outside , And provides the analysis result to the middleware server.

The middleware server provides the analysis result and the real-time power status information provided from the first to third micro grid cells to the integrated control system. The integrated control system analyzes the analysis result provided from the middleware server and the first to third micro- The power supply state of the first to third micro-grid cells is integrated based on the real-time power state information of the grid cell.

The first ESS is capable of supplying uninterruptible power to the first load of the system power failure or recuperation.

The first micro grid cell comprises an emergency generator, an STS for opening and closing the system-to-ESS connection and a connection between the system and the first load, a first EMS (Energy Management System) for controlling the emergency generator and the first ESS .

In case of system power failure, STS detects grid failure and disconnects the system. The first ESS changes the drive mode from constant power mode to CVCF (Constant Voltage Constant Frequency) mode to supply power independently to the first load The first EMS drives the emergency generator when the first ESS is switched to the CVCF mode and supplies power independently to the first load, the emergency generator driven by the first EMS supplies power to the first load side, The STS provides a first notification to the first ESS when power supplied by the emergency generator is detected, and when the first ESS receives the first notification from the STS, it performs a first synchronization algorithm, 1 is an algorithm for synchronizing the frequency, voltage and phase angles of the ESS with the frequency, voltage and phase angle of the emergency generator.

When the first synchronization algorithm of the first ESS is performed, the STS releases the connection with the system, the emergency generator is driven in the frequency tracking mode, and the first ESS is changed back to the constant power mode and driven.

The first EMS stops the operation of the emergency generator, the STS senses the operation stop of the emergency generator and provides the second notification to the first ESS, disconnects the connection with the system again, and the first ESS Upon receiving the second notification from the STS, the STS changes the mode from the constant power mode to the CVCF mode to supply power independently to the first load. When power is supplied from the system to the first load side, the STS senses the power supplied by the system The first ESS provides a third notification to the first ESS, and when the first ESS receives the third notification from the STS, it performs a second synchronization algorithm, and when the first ESS performs the second synchronization algorithm, The second synchronization algorithm is an algorithm for synchronizing the frequency, voltage and phase angle of the first ESS with the frequency, voltage and phase angle of the system.

During system power failure, the first ESS and the emergency generator are connected to each other to supply power to the first load uninterruptively, and the integrated control system calculates the free power and the under power of each of the first and second micro grid cells, And provides the determined power budget value to the first micro grid cell via the middleware server.

The first EMS receives the determined power value from the middleware server and delivers the determined power value to the first ESS. The first ESS controls the charge amount of the battery based on the determined power value, The control system drives the changeover switch to connect the first micro-grid cell and the second micro-grid cell, and the first ESS connects the first micro-grid cell and the second micro-grid cell, Supply.

The second load includes at least one load having a different priority, and the integrated control system is configured to control the power consumption of the first micro grid cell based on the remaining power amount of the first micro grid cell, And the first ESS supplies power to the high priority load of the second load when the first micro grid cell and the second micro grid cell are connected.

During system power failure, the first ESS is driven in a stand-alone operation mode to supply power to the first load uninterruptively, and the integrated control system calculates the available power and the underpower of each of the first and second micro- And provides the determined power budget value to the first micro grid cell via the middleware server.

The first micro-grid cell includes a first EMS for unifying and controlling the first ESS and the first load, wherein the first EMS is provided with a determined power value from the middleware server, and the determined power- And the first ESS controls the charge amount of the battery on the basis of the determined power availability value and the integrated control system drives the change switch to connect the first micro grid cell and the second micro grid cell, The ESS supplies power to the second micro-grid cell when the first micro-grid cell and the second micro-grid cell are connected.

The second load includes at least one load having a different priority, and the integrated control system is configured to control the power consumption of the first micro grid cell based on the remaining power amount of the first micro grid cell, And the first ESS supplies power to the high priority load of the second load when the first micro grid cell and the second micro grid cell are connected.

The conversion switch is any one of a transfer switch (TS), a static transfer switch (STS), a back-to-back converter, and an automatic load transfer switch (ALTS).

The power priority of the first load is higher than the power priority of each of the second load and the third load.

The first microgrid cell comprises a building energy management system (BEMS), a distribution board for communicating with the BEMS, a building automation system (BAS) for communicating with the BEMS, a heating and cooling system connected to the BAS, And a third ESS coupled to the BAS, wherein the BEMS controls at least one of the air conditioning system, the first distributed power system, and the third ESS via the BAS to reduce the peak load.

The second micro grid cell further includes a second distributed power supply system driven in conjunction with the second ESS, and a second EMS (Energy Management System) controlling the second ESS and the second distributed power supply system.

The changeover switch has one end connected between the first ESS and the first load and the other end connected between the second ESS and the second load.

According to another aspect of the present invention, there is provided a hierarchical power control system connected to a cloud server. The hierarchical power control system includes a controller for controlling a connection to a system through a CTTS (Closed Transition Transfer Switch) A first micro grid cell including a first emergency power generator, a first ESS (Energy Storage System) driven in association with the emergency generator, and a first load whose power state is managed by the first ESS, A second micro grid cell including a second ESS for managing the power state of the load, a third micro grid cell including a third load, a middleware server communicating with the first through third micro grid cells, And an integrated control system for communicating with the server and controlling the first to third micro-grid cells integrally, wherein the first micro-grid cell and the second micro- It is opened and closed via the changing-over switch.

The first microgrid cell further includes an STS that opens and closes the link between the system and the first ESS and the link between the system and the first load, and a first EMS (Energy Management System) that controls the emergency generator and the first ESS.

In case of system power failure, STS detects grid failure and disconnects the system. The first ESS changes the drive mode from constant power mode to CVCF (Constant Voltage Constant Frequency) mode to supply power independently to the first load And the first EMS activates the emergency generator when the first ESS is switched to the CVCF mode and supplies power independently to the first load. When the emergency generator is activated, the CTTS disconnects the emergency generator and the system, The STS provides a first notification to the first ESS when power supplied by the emergency generator is detected and the first ESS sends a first notification from the STS to the STS, A first synchronization algorithm is performed.

When the first synchronization algorithm of the first ESS is performed, the STS releases the connection with the system, the emergency generator is driven in the frequency tracking mode, and the first ESS is changed back to the constant power mode and driven.

When the STS is connected to the system, the CTTS stops the operation of the emergency generator. The CTTS stops the connection between the emergency generator and the STS, detects the stop of the emergency generator, Performs a synchronization algorithm for the CTTS, wherein the synchronization algorithm for the CTTS is an algorithm for synchronizing the frequency, voltage and phase angle of the first ESS with the frequency, voltage and phase angle of the system.

The first EMS stops the operation of the emergency generator, the STS senses the operation stop of the emergency generator and provides the second notification to the first ESS, disconnects the connection with the system again, and the first ESS When the second notification is received from the STS, the mode is switched from the constant power mode to the CVCF mode to supply power independently to the first load. When the first ESS changes to the CVCF mode, the CTTS interrupts the connection between the emergency generator and the STS When the STS is connected to the grid and power is supplied from the grid to the first load side, the STS senses the power supplied by the grid to provide a third notification to the first ESS, and the first ESS receives a third notification from the STS When the first ESS performs the second synchronization algorithm, the STS resumes the connection disconnection with the system, and when the connection disconnection with the system is released again, the first ESS resets the CVCF Constant power mode Doedoe changed again, the second synchronization algorithm is an algorithm for synchronizing the frequency, voltage and phase angle of the grid frequency, voltage and phase angle of the 1 ESS.

According to another aspect of the present invention, there is provided a hierarchical power control system connected to a cloud server, the hierarchical power control system comprising: a first ESS (Energy Saving Controller) having an uninterruptible power supply (UPS) A second micro grid cell including a first micro grid cell including a first load that is managed by a first ESS and a first load that is managed by a first ESS and a second ESS that manages power states of a second load and a second load, , A third micro-grid cell including a third load, and an integrated control system communicating with the first through third micro-grid cells and integrally controlling the power supply and demand states of the first through third micro-grid cells, The connection between one microgrid cell and the second microgrid cell is opened and closed through a changeover switch.

The first micro-grid cell comprises an emergency generator, a STS (Static Transfer Switch) for opening and closing the system-to-ESS connection and the connection between the system and the first load, a first EMS Energy Management System).

According to another aspect of the present invention, there is provided a hierarchical power control system in a hierarchical power control system connected to a cloud server, the system comprising: A first micro grid cell including a first emergency load, an emergency generator, a first ESS (Energy Storage System) driven in association with the emergency generator, and a first load whose power status is managed by the first ESS, A second micro-grid cell including a second ESS for managing the power state of the second load, a third micro-grid cell including a third load, and first to third micro-grid cells, And an integrated control system for integrally controlling the grid cells, wherein a connection between the first micro-grid cell and the second micro-grid cell is opened and closed through a changeover switch.

As described above, according to the present invention, it is possible to efficiently solve the power supply and demand problem by efficiently performing power-to-cell inter-micro grid cell power failure during system power failure through an integrated control system that integrally controls the power supply state of the first through third micro grid cells .

1 is a schematic diagram illustrating a hierarchical power control system according to an embodiment of the present invention.
2 is a schematic view for explaining the first to third micro-grid cells of FIG.
3 is a schematic diagram illustrating the first micro-grid cell of Fig.
FIGS. 4 to 11 are schematic diagrams illustrating an example of the independent operation method of the first micro grid cell of FIG. 3 during system power failure.
FIGS. 12 to 21 are schematic views for explaining another example of the independent operation method of the first micro grid cell of FIG. 3 during system power failure.
FIG. 22 is a flowchart for explaining a power-up method of the hierarchical power control system of FIG. 1;

The above and other objects, features, and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, which are not intended to limit the scope of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to denote the same or similar elements.

Hereinafter, a hierarchical power control system according to an embodiment of the present invention will be described with reference to FIG. 1 to FIG.

1 is a schematic diagram illustrating a hierarchical power control system according to an embodiment of the present invention. 2 is a schematic view for explaining the first to third micro-grid cells of FIG. 3 is a schematic diagram illustrating the first micro-grid cell of Fig.

1 and 2, a hierarchical power control system 1 according to an embodiment of the present invention includes an integrated control system 100, a middleware server 200, a first micro grid cell 300, A micro-grid cell 400, and a third micro-grid cell 500.

The hierarchical power control system 1 of FIG. 1 may further include a cloud server 600, but in the present invention, the hierarchical power control system 1 includes a cloud server 600, Will not be described.

Also, although not shown in the figure, the hierarchical power control system 1 of Fig. 1 may further include a system. Here, although the system may exist in each of the first through third micro grid cells 300, 400, and 500, only one system common to the first through third micro grid cells 300, 400, and 500 may exist have.

The system may also include, for example, a power station, a substation, a transmission line, and the like.

The integrated control system 100 can communicate with the middleware server 200 and control the power supply and reception states of the first to third micro grid cells 300,

Specifically, the integrated control system 100 can be largely designed to have integrated monitoring and control functions and optimal power generation and control functions.

The integrated monitoring and control functions include, for example, monitoring, control, reporting, alarming, calculation, database management, trending, (Trend), and a display function.

Here, the monitoring function includes a state / fault monitoring and measurement function of the first to third micro grid cells 300, 400, and 500, and the control function includes the first to third micro grid cells 300, 400, 500 And may include an operation / stop / scheduling function and an optimum operation control function of the facilities provided in the system.

The reporting function includes the function of providing period-specific measurement information and operation / maintenance records for the first to third micro-grid cells 300, 400, 500, and the alarm function may include an alarm-aware processing and storage function have.

The arithmetic function includes a function of providing arithmetic / function functions for data requiring power factor calculation and the DB management function may include a data interface function through a real-time database API (application program interface).

The trend function includes a function of monitoring a trend of data change. The screen display function is a function of monitoring, event, alarm, authority, and the like on the screen (for example, the screen of the integrated control system 100 or the cloud server 600) (E.g., a screen of the mobile terminal 800).

On the other hand, the optimal power generation and control functions include, for example, a load prediction function, a solar power generation prediction function, an optimum power generation planning function, an economical power supply function, an automatic power generation control function, Algorithm execution function.

Here, the load prediction function includes a function of designing by applying an ensemble multiple model combination algorithm that derives a result using various prediction algorithms, and a function of acquiring historical data of the load in the system and storing it in the Oracle DB .

The photovoltaic power generation prediction function is a function of predicting the amount of generated power using the K-mean cluster technique by patterning the probability of precipitation based on the precipitation amount information provided from the outside 700 (for example, the meteorological agency) through the cloud server 600 And a function of designing an algorithm by classifying the meteorological office linkage prediction and the non-linkage prediction.

The optimum power generation plan setting function may include a function of establishing each optimal power generation plan considering the power supply / demand state of the first to third micro grid cells 300, 400, and 500.

The economic dispatch function may include the ability to determine the output of a thermal / electrical energy source for an energy source driven as a result of an optimal power generation plan and to derive the results divided into microgrid cell units.

The automatic power generation control function may include a function of designing to follow the targets of the grid connection mode (maintaining the connected tide) and the independent operation mode (maintaining the frequency).

Assumption function may include the ability to calculate electricity rates based on electricity usage history data.

The load cutoff function can include a function to cut off the load by priority in case of exceeding the reference value.

The function of performing the islanding algorithm may include the function of searching for power flexibility and load cutoff in independent operation.

The integrated control system 100 may receive various information from the middleware server 200, and may integrate and control the power supply / demand states of the first to third micro grid cells based on the received information.

Details of this will be described later.

The middleware server 200 may communicate with the first through third micro grid cells 300, 400 and 500.

For reference, the middleware server 200 does not exist separately and may be included in the integrated control system 100. In this case, the integrated control system 100 may directly communicate with the first to third micro grid cells 300, 400, 500 or the cloud server 600.

However, for convenience of explanation, it is assumed that the middleware server 200 exists separately from the integrated control system 100 in the present invention.

In detail, the middleware server 200 may provide the real-time power status information provided from the first to third micro-grid cells 300, 400, and 500 to the integrated control system 100, To the first to third micro-grid cells 300, 400, and 500. The micro-

Also, the middleware server 200 can receive the analysis result from the cloud server 600.

The cloud server 600 is provided with at least one of climate data and power related data from an external device 700 (e.g., Korea Meteorological Administration or KEPCO) and receives data from at least one of the first to third sensors 320, 420, 520 May be provided with power states of the first to third loads 350, 450 and 550, respectively.

In addition, the cloud server 600 may store the power state of the first to third loads 350, 450, and 550 provided from the first to third sensors 320, 420 and 520, And provides the analysis result to the middleware server 200. [0050] FIG.

That is, the middleware server 200 can provide the integrated control system with real-time power status information provided from the analysis results provided from the cloud server 600 and the first through third micro grid cells 300, 400, have.

In this way, the integrated control system 100 can generate the first to third micro grids 300, 400, and 500 based on the analysis results provided from the middleware server 200 and the real-time power state information of the first to third micro- The power supply / demand state of the cells 300, 400, and 500 can be integrated and controlled.

In addition, the cloud server 600 interlocks with the mobile terminal 800 and transmits the power related information to the mobile terminal 800, thereby allowing the user to transmit the information to the first through third micro grid cells 300, 400, and 500, respectively.

The first microgrid cell 300 may include a first ESS 360 with a UPS structure and a first load 350 with a power state managed by a first ESS 360.

2 and 3, the first micro-grid cell 300 includes a first EMS 310, a first sensor 320, an emergency generator 330, a first ESS 360, a building- A power system 390, and a first load 350.

For reference, the first micro grid cell 300 may not include the emergency generator 330. In this case, the first ESS 360 with the UPS structure can supply power to the first load 350 in an uninterrupted manner.

However, for convenience of explanation, it is assumed that the first micro grid cell 300 includes the emergency generator 330 in the present invention.

The first EMS 310 may control the emergency generator 330 and the first ESS 360.

Specifically, the first EMS 310 includes components (i.e., a first sensor 320, an emergency generator 330, a first ESS 360, a building-related power system (390), and the first load (350).

The first EMS 310 can communicate with the middleware server 200 so that the power related data of the first micro grid cell 300 can be transmitted to the middleware server 200 or can be transmitted from the middleware server 200 to the integrated control system 200. [ Or may be provided with a control signal or command of the controller 100.

For reference, the first EMS 310 generates information on the maintenance and repair of the battery 366 based on data on the battery 366 provided from the PMS 362, 366 may be provided to the BMS 368 (Battery Management System) for managing the battery 366 via the PMS 362.

The first sensor 320 may sense the power state of the first load 350. [

Specifically, the first sensor 320 may be, for example, an IoT sensor equipped with a communication function and may sense the power state of the first load 350 (e.g., whether power is low, whether power is excessive, etc.) And provide the sensed information to the cloud server 600.

Emergency generator 330 may be driven by first EMS 310 during system power failure.

In particular, the emergency generator 330 may be, for example, a diesel generator, and may be driven in conjunction with the first ESS 360 to ensure that the uninterruptible independent operation of the first micro grid cell 300 during a grid failure occurs for a certain period of time For example, 4 hours).

For reference, the initial investment cost can be reduced by utilizing the existing diesel generator as the emergency generator 330 and using the small capacity ESS as the first ESS 360. In addition, since the emergency generator 330 can be operated independently for a long time or indefinitely, reliability of electric power supply and demand can be ensured, and planned operation can be performed independently, thereby ensuring economical efficiency by reducing peak load.

The first ESS 360 can be provided with a UPS structure and is designed to be capable of independent and independent operation in case of an accident such as system power failure, thereby enabling a reliable power supply.

Specifically, the first ESS 360 can supply power to the first load 350 and the power state of the first load 350 based on the UPS structure, in a systematic power failure or in a recovery uninterruptible manner.

Here, the first ESS 360 may include a PMS 362, a PCS 364, a battery 366, and a BMS 368.

The PCS 364 may store power generated in the distributed power system (not shown) (e.g., a renewable energy system such as solar or wind power) to the battery 366 or route it to the first load 350 . The PCS 364 may also communicate the power stored in the battery 366 to the system or first load 350. The PCS 364 may store the power supplied by the system in the battery 366. [

The PCS 364 can also control charging and discharging of the battery 366 based on the state of charge (hereinafter referred to as "SOC level") of the battery 366.

For reference, the PCS 364 may generate a schedule for the operation of the first ESS 360 based on the power price of the power market, the power generation plan of the distributed power system, the power generation amount, and the power demand of the grid.

The battery 366 may be charged or discharged by the PCS 364. [

Specifically, the battery 366 may receive and store one or more of the distributed power system and the power of the system, and may supply the stored power to one or more of the first load 350 systems. The battery 366 may include at least one battery cell, and each battery cell may include a plurality of bare cells.

The BMS 368 may monitor the condition of the battery 366 and control the charging and discharging operations of the battery 366. [ The BMS 368 may also monitor the condition of the battery 366 including the SOC level that is the charged state of the battery 366 and may monitor the state of the monitored battery 366 (e.g., voltage, current, temperature, The amount of power, the life span, the state of charge, etc.) to the PCS 364. [

The BMS 368 may also perform a protection operation to protect the battery 366. For example, the BMS 368 may perform one or more of overcharge protection, over-discharge protection, over-current protection, over-voltage protection, over-temperature protection, and cell balancing for the battery 366.

The BMS 368 may also adjust the SOC level of the battery 366.

Specifically, the BMS 368 may receive control signals from the PCS 364 and adjust the SOC level of the battery 366 based on the received signal.

The PMS 362 may control the PCS 364 based on data associated with the battery 366 provided by the BMS 368.

In particular, the PMS 362 may monitor the status of the battery 366 and monitor the status of the PCS 364. [ That is, the PMS 362 may control the PCS 364 according to its efficiency based on the data associated with the battery 366 received from the BMS 368.

The PMS 362 may also monitor the status of the battery 366 via the BMS 368 and provide the collected data to the first EMS 310 about the battery 366.

The building related power system 390 may include a BEMS 392, a distribution board 398, a BAS 393, a heating and cooling system 394, a first distributed power system 395 and a third ESS 396.

Specifically, the BEMS 392 can control at least one of the heating / cooling system 394, the first distributed power system 395, and the third ESS 396 via the BAS 393 to reduce the peak load, The distribution board 398 is also controllable.

The distribution board 398 and the BAS 393 can be controlled through communication with the BEMS 392 and the cooling and heating system 394, the first distributed power system 395, the third ESS 396, Lt; / RTI > can be controlled by the BEMS 392. < RTI ID = 0.0 >

This building-related power system 390 can be optimally controlled for energy savings, thereby reducing energy costs and peak loads.

The first load 350 may be managed by the first ESS 360 in a power state and may include, for example, a home, a large building, a factory, and the like.

Specifically, the first load 350 can be managed by at least one of the first ESS 360, the emergency generator 330, and the building-related power system 390, and the first sensor 320, Lt; / RTI >

For reference, the first load 350 may be a critical load (e.g., laboratory building, hospital, etc.) that requires uninterruptible high quality power supply.

Accordingly, in performing the power-up operation of the integrated control system 100, the power priority of the first load 350 may be higher than the power priority of each of the second load 450 and the third load 550 have.

The second microgrid cell 400 may include a second ESS 460 that manages the power state of the second load 450 and the second load 450.

Specifically, the second micro grid cell 400 may include a second EMS 410, a second sensor 420, a second load 450, and a second ESS 460.

For reference, although not shown, the second micro-grid cell 400 may include a second distributed power system (not shown) driven in conjunction with a second ESS 460, for example, Renewable energy system).

The second EMS 410 may control the second ESS 460 and the second distributed power system.

Specifically, the second EMS 410 is configured to receive the components (i.e., the second sensor 420, the second load 450, the second ESS 460, the second dispersion 420) included in the second micro- Power system) of the system.

The second EMS 410 may communicate with the middleware server 200 and may transmit power related data of the second microgrid cell 400 to the middleware server 200 or may be transmitted from the middleware server 200 to the integrated control system 200. [ Or may be provided with a control signal or command of the controller 100.

The second sensor 420 may sense the power state of the second load 450. [

Specifically, the second sensor 420 may be, for example, an IoT sensor equipped with a communication function and may sense the power state of the second load 450 (e.g., whether power is low, whether power is excessive, etc.) And provide the sensed information to the cloud server 600.

The second load 450 may be managed by the second ESS 460 in a power state and may include, for example, a home, a large building, a factory, and the like.

Specifically, the second load 450 can be managed by the second ESS 460 and can be connected to the second sensor 420.

For reference, the second load 450 may be a general load (e.g., a classroom building, dormitory, etc.) that requires energy efficiency through connection with a second distributed power system.

Also, the second load 450 may include at least one load 450a-450c having different priorities.

Accordingly, when power is supplied from the first micro-grid cell 300 due to an accident such as system power failure, only the load having the highest priority among the second loads 450 can be selected and supplied with power.

That is, a load (for example, 450a) having a high priority among the second loads 450 may be driven by receiving power from the first micro grid cell 300 even if a system power failure occurs, The loads (for example, 450b and 450c) may not be able to receive power when the system is out of order.

To summarize, the second micro-grid cell 400 may include loads that need to be selectively driven based on characteristics or priorities in the event of an accident such as system power failure.

The second ESS 460 may manage the power state of the second load 450 and may perform a peak control function.

Also, the second ESS 460 may include a PMS, a battery, a BMS, and a PCS like the first ESS 360 described above, but a detailed description thereof will be omitted.

For reference, the second micro-grid cell 400 may be connected to the first micro-grid cell 300 through a conversion switch 380. [

That is, the connection between the first micro-grid cell 300 and the second micro-grid cell 400 can be opened or closed through the changeover switch 380. [

The switch 380 normally disconnects the connection between the first micro-grid cell 300 and the second micro-grid cell 400 and prevents the first micro-grid cell 300 and the second micro- And the grid cells 400 are connected to each other to enable power flexibility between them.

The conversion switch 380 may be any one of, for example, a transfer switch (TS), a static transfer switch (STS), a back-to-back converter and an automatic load transfer switch (ALTS).

The switch 380 may be connected at one end between the first ESS 360 and the first load 350 and the other end may be connected between the second ESS 460 and the second load 450, But is not limited thereto.

Depending on the situation, an AC-DC converter or a DC-AC converter or the like may be installed at both ends of the changeover switch 380 to change the AC voltage to the DC voltage or change the DC voltage to the AC voltage.

The third microgrid cell 500 may include a third load 550.

In particular, the third microgrid cell 500 may include a third sensor 520 and a third load 550.

For reference, unlike the second micro-grid cell 400, the third micro-grid cell 500 may have no EMS, ESS, or distributed power system. Accordingly, the power supply state of the third micro-grid cell 500 can be transmitted to the middleware server 200 through the cloud server 600. [

Of course, the third sensor 520 of the third microgrid cell 500 may directly communicate the power state of the third load 550 to the middleware server 200 by communicating with the middleware server 200.

The third sensor 520 may sense the power state of the third load 550.

Specifically, the third sensor 520 may be, for example, an IoT sensor equipped with a communication function and may sense the power state of the third load 550 (e.g., whether power is low, whether power is excessive, etc.) And provide the sensed information to the cloud server 600.

The third load 550 may include, for example, a home, a large building, a factory, and the like.

Specifically, the third load 550 may be coupled to the third sensor 520.

The third load 550 may be a generic load that is not associated with the distributed power system and may be an analysis based energy reduction service through the third sensor 520 (e.g., 3 power state information of the third load 550 via the mobile terminal 800 that allows the user to communicate with the cloud server 600 by transmitting the power state information of the third load 550) It can be done for the purpose.

Hereinafter, an example of the independent operation method of the first micro grid cell of Fig. 3 during system power failure will be described with reference to Figs. 4 to 11. Fig.

FIGS. 4 to 11 are schematic diagrams illustrating an example of the independent operation method of the first micro grid cell of FIG. 3 during system power failure.

For reference, some components not shown in FIG. 3 are added to the first micro-grid cell 300 of FIGS. 4-11, or some of the components shown in FIG. 3 are shown in FIGS. The first micro grid cell 300 of FIG.

3 to 6, the STS 324 (Static Transfer Switch) detects a power failure of the system G and interrupts the connection with the system G when a power failure occurs in the system G, 360 can supply power to the first load 350 independently by changing the drive mode from the constant power mode to the CVCF (Constant Voltage Constant Frequency) mode.

Specifically, the STS 324 may open and close the connection between the system G and the first ESS 360 and the connection between the system G and the first load 350.

In addition, the STS 324 can interrupt the connection with the system G by detecting a power failure of the system G within a time of 4 ms when the system G is powered down.

The first ESS 360 also changes the drive mode to the CVCF mode within 10 ms at the time of power failure of the system G and then stably supplies power to the first load 350 Driving).

At this time, the circuit breaker 321 provided on the side of the system G may also be disconnected from the system G. [

3, 7, and 8, when the first ESS 360 is changed to the CVCF mode and supplies power to the first load 350 independently, the first EMS 310 generates an emergency generator 330 And the emergency generator 330 driven by the first EMS 310 can supply power to the first load 350 side.

At this time, the breaker 322 provided on the side of the emergency generator 330 activates the connection of the emergency generator 330, but the connection between the emergency generator 330 and the first load 350 is blocked due to the STS 324 . As a result, the emergency generator 330 performs no-load operation.

The STS 324 provides a first notification to the first ESS 360 when power supplied by the emergency generator 330 is sensed and the first ESS 360 receives a first notification from the STS 324 , A first synchronization algorithm may be performed.

The first synchronization algorithm may be an algorithm for synchronizing the frequency, voltage, and phase angle of the first ESS 360 with the frequency, voltage, and phase angle of the emergency generator 330.

When the first synchronization algorithm of the first ESS 360 is performed, the STS 324 cancels the connection with the system G, and the emergency generator 330 is driven in the frequency tracking mode and the first ESS 360 Can be changed back to the constant power mode and driven.

Accordingly, the first load 350 can be stably supplied with power from the emergency generator 330 and the first ESS 360 until the system G is restored.

3, 9 to 11, the first EMS 310 may stop the operation of the emergency generator 330, and the system G may be restored.

At this time, the breaker 322 installed on the side of the emergency generator 330 cuts off the connection of the emergency generator 330.

The STS 324 senses the stoppage of the emergency generator 330 to provide a second notification to the first ESS 360 and to disconnect the connection with the system G again.

When the first ESS 360 is provided with the second notification from the STS 324, the first ESS 360 can change the CVCF mode in the constant power mode and supply power independently to the first load 350.

The STS 324 senses the electric power supplied by the system G and supplies electric power to the first load 350 when the electric power is supplied to the first load 350 from the system G by activating the circuit breaker 321 provided on the system G side again, Lt; RTI ID = 0.0 > ESS < / RTI >

When the first ESS 360 is provided with a third notification from the STS 324 to perform a second synchronization algorithm and the first ESS 360 performs a second synchronization algorithm, G) can be released again.

Here, the second synchronization algorithm may be an algorithm for synchronizing the frequency, voltage, and phase angle of the first ESS 360 with the frequency, voltage, and phase angle of the system G. [

In addition, the STS 324 is again released from the connection with the system G, so that the system G can be restored to the state before the system failure.

During the power failure of the system G, the first micro-grid cell 300 of the present invention can operate independently.

In addition, the independent operation of the first micro grid cell 300 described above can reduce costs by implementing a discrete independent operation with a small-capacity battery (the battery 366 in the first ESS 360) ) And the first ESS 360 can be operated independently for a long time (for example, 4 hours or more).

Hereinafter, another example of the independent operation method of the first micro grid cell of Fig. 3 during system power failure will be described with reference to Figs. 12 to 21. Fig.

FIGS. 12 to 21 are schematic views for explaining another example of the independent operation method of the first micro grid cell of FIG. 3 during system power failure.

For reference, some components not shown in Fig. 3 are added to the first microgrid cell 300 of Figs. 12 to 21, or some of the components shown in Fig. 3 are shown in Figs. 12 to 21 The first micro grid cell 300 of FIG.

Referring to FIGS. 3 and 12 to 14, at the time of power failure of the system G, the STS 324 (Static Transfer Switch) senses the power failure of the system G to block the connection with the system G, 1 ESS 360 can supply power independently to the first load 350 by changing the drive mode from the constant power mode to the CVCF (Constant Voltage Constant Frequency) mode.

Specifically, the STS 324 may open and close the connection between the system G and the first ESS 360 and the connection between the system G and the first load 350.

In addition, the STS 324 can interrupt the connection with the system G by detecting a power failure of the system G within a time of 4 ms when the system G is powered down.

The first ESS 360 also changes the drive mode to the CVCF mode within 10 ms at the time of power failure of the system G and then stably supplies power to the first load 350 Driving).

At this time, the circuit breaker 321 provided on the side of the system G may also be disconnected from the system G. [

3, 15 to 17, when the first ESS 360 is changed to the CVCF mode and supplies power independently to the first load 350, the first EMS 310 generates an emergency generator 330 Can be driven.

In addition, when the emergency generator 330 is driven, the CTTS 326 can connect the emergency generator 330 with the STS 324 while disconnecting the connection between the emergency generator 330 and the system G , The emergency generator 330 can supply electric power to the first load 350 side.

The CTTS 326 can open and close the connection between the system G and the STS 324 and the connection between the system G and the emergency generator 330. [ In other words, the CTTS 326 enables the uninterrupted operation from the system G to the emergency generator 330 or the operation from the emergency generator 330 to the system G.

At this time, the breaker 322 provided on the side of the emergency generator 330 activates the connection of the emergency generator 330, but the connection between the emergency generator 330 and the first load 350 is blocked due to the STS 324 . As a result, the emergency generator 330 performs no-load operation.

The STS 324 provides a first notification to the first ESS 360 when power supplied by the emergency generator 330 is sensed and the first ESS 360 receives a first notification from the STS 324 , A first synchronization algorithm may be performed.

The first synchronization algorithm may be an algorithm for synchronizing the frequency, voltage, and phase angle of the first ESS 360 with the frequency, voltage, and phase angle of the emergency generator 330.

When the first synchronization algorithm of the first ESS 360 is performed, the STS 324 cancels the connection with the system G, and the emergency generator 330 is driven in the frequency tracking mode and the first ESS 360 Can be changed back to the constant power mode and driven.

Accordingly, the first load 350 can be stably supplied with power from the emergency generator 330 and the first ESS 360 until the system G is restored.

3, 18, and 19, the circuit breaker 321 installed on the side of the system G can be activated.

The first EMS 310 may stop the operation of the emergency generator 330 while the system G is in the recovery state and the CTTS 326 may detect the operation stop of the emergency generator 330 and may stop the operation of the emergency generator 330 The STS 324 can be connected to the system G while blocking the connection between the STSs 324.

At this time, the breaker 322 installed on the side of the emergency generator 330 cuts off the connection of the emergency generator 330.

When the STS 324 is connected to the system G, the CTTS 326 may synchronize the power provided by the system G with the power of the first ESS 360 by performing a synchronization algorithm for CTTS.

Here, the synchronization algorithm for the CTTS may be an algorithm for synchronizing the frequency, voltage and phase angles of the first ESS with the frequency, voltage and phase angles of the system.

The STS 324 is connected to the system G and the electric power supplied from the system G and the electric power of the first ESS 360 are synchronized so that the state of the system G can be restored to the normal state again.

3, 18, 20 and 21, it can be re-connected to the system G through a process different from that of FIGS. 18 and 19.

Specifically, the circuit breaker 321 installed on the side of the system (G) can be activated.

The first EMS 310 stops the operation of the emergency generator 330 and the STS 324 detects the stop of the operation of the emergency generator 330 to provide a second notification to the first ESS 360, It is possible to shut off the connection with the gateway G again.

Here, when the driving of the emergency generator 330 is stopped, the breaker 322 installed on the side of the emergency generator 330 blocks the connection of the emergency generator 330.

When the first ESS 360 is provided with the second notification from the STS 324, the first ESS 360 can change the CVCF mode in the constant power mode and supply power independently to the first load 350.

Here, when the first ESS 360 is changed to the CVCF mode, the CTTS 326 may connect the STS 324 with the grid G while blocking the connection between the emergency generator 330 and the STS 324 .

When power is supplied from the system G to the first load 350 side, the STS 324 senses the power supplied by the system G to provide a third notification to the first ESS 360, When the ESS 360 is provided with the third notification from the STS 324, it may perform a second synchronization algorithm.

When the first ESS 360 performs a second synchronization algorithm, the STS 324 cancels the connection with the system G again, and once the connection with the system G is released again, the first ESS 360 360) can be changed back to the constant power mode in CVCF mode.

For reference, the second synchronization algorithm may be an algorithm for synchronizing the frequency, voltage, and phase angle of the first ESS 360 with the frequency, voltage, and phase angle of the system G. [

In addition, the STS 324 is again released from the connection with the system G, so that the system G can be restored to the state before the system failure.

Hereinafter, with reference to FIG. 22, a power-up method of the hierarchical power control system of FIG. 1 will be described.

FIG. 22 is a flowchart for explaining a power-up method of the hierarchical power control system of FIG. 1;

Referring to FIGS. 1 to 3 and 22, first, a system power failure is detected (S100).

Specifically, the integrated control system 100 senses the power failure of the grid (not shown), and notifies the first to third micro grid cells 300, 400, and 500 of the grid failure through the middleware server 200 And may be directly sensed in each of the first to third micro grid cells 300, 400 and 500.

When the system power failure is detected (S100), the independent operation of the first micro grid cell is started (S200).

Specifically, the first micro-grid cell 300 is capable of uninterrupted independent operation through the above-described method.

That is, power can be supplied to the first load 350 in an uninterrupted manner through the cooperative operation of the first ESS 360 and the emergency generator 330 in the first micro grid cell 300.

Of course, in the case where the emergency generator 330 is not provided in the first micro grid cell 300, the first ESS 360 having the UPS structure is driven in the independent operation mode to uninterruptively power the first load 350 Can be supplied.

When the independent operation of the first micro grid cell 300 is started (S200), the power margin value is determined by calculating the free power and the under power of each of the first and second micro grid cells (S300).

Specifically, the first micro-grid cell 300 and the second micro-grid cell 400 may provide their own redundant power and insufficient power information to the integrated control system 100 through the middleware server 200, respectively.

When the integrated control system 100 receives the redundant power and the insufficient power information of the first micro-grid cell 300 and the second micro-grid cell 400 through the middleware server 200, Can be calculated to determine the power budget value.

Here, the power budget value may mean a power amount value that can be provided (provided) to a micro grid cell having insufficient power in a micro grid cell having a spare power.

If the power budget value is determined (S300), the determined power budget value is provided to the first micro grid cell 300 (S400).

Specifically, the integrated control system 100 can provide the power flexibility value to the microgrid cell having the spare power through the middleware server 200. [

For reference, the first micro-grid cell 300 can be operated in uninterruptible independent operation for a certain period of time during system power failure, so that there is a margin power.

Accordingly, the integrated control system 100 can provide the power fitness value to the first micro grid cell 300 having the available power through the middleware server 200. [

Of course, there is an extra power in the second micro-grid cell 400 and the first micro-grid cell 300 may lack power. However, for convenience of explanation, in the present invention, The second micro-grid cell 400 has an excess power, and the second micro-grid cell 400 lacks power.

If the first micro grid cell is provided with the power fitness value (S400), the charge amount of the battery 366 of the first ESS 360 is controlled based on the power fitness value (S500).

Specifically, the first EMS 310 may receive the determined power value from the middleware server 200 and may forward the determined power value to the first ESS 360.

The first ESS 360 can control the charging amount (i.e., at least one of the charging amount and the discharging amount) of the battery 366 based on the received power availability value.

When the charge / discharge amount of the battery 366 in the first micro grid cell 300 is controlled (S500), the first micro grid cell 300 and the second micro grid cell 400 are connected (S600).

Specifically, the integrated control system 100 may drive the changeover switch 380 to couple the first micro-grid cell 300 and the second micro-grid cell 400 together.

When the first micro-grid cell 300 and the second micro-grid cell 400 are connected (S600), power is supplied to the second micro-grid cell 400 (S700).

In detail, the first ESS 360 may supply power to the second micro grid cell 400 when the first micro grid cell 300 and the second micro grid cell 400 are connected.

In addition, the integrated control system 100 may determine that the amount of spare power in the first microgrid cell 300 and the priority in the second load 450 in the second microgrid cell 400, for example, The power budget value can be determined based on the amount of power required at a high load.

Accordingly, when the first micro-grid cell 300 and the second micro-grid cell 400 are connected, the first ESS 360 can supply power to the load having the higher priority among the second loads 450. [

In detail, when the first ESS 360 powers the second micro grid cell 400, the second ESS 460 of the second micro grid cell 400 receives the power supplied from the first ESS 360 It is possible to supply power to the load having the higher priority among the second loads 450. [

Of course, the power supplied by the first ESS 360 to the second micro-grid cell 400 may be directly supplied to the load of the second load 450 without going through the second ESS 460.

As described above, according to the present invention, through the integrated control system 100 that integrally controls the power supply state of the first to third micro grid cells 300, 400, and 500, The problem of power supply and demand can be solved.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, But the present invention is not limited thereto.

100: Integrated control system 200: Middleware server
300: first microgrid cell 380: conversion switch
400: second microgrid cell 500: third microgrid cell
600: Cloud server 700: External
800: mobile terminal

Claims (29)

A hierarchical power control system associated with a cloud server,
A first micro grid cell including a first ESS (Energy Storage System) having an uninterruptible power supply (UPS) structure and a first load managed by the first ESS;
A second micro grid cell including a second ESS for managing a power state of the second load and the second load;
A third microgrid cell including a third load;
A middleware server communicating with the first through third micro grid cells; And
And an integrated control system that communicates with the middleware server and integrally controls power supply and demand states of the first through third micro grid cells,
The connection between the first micro-grid cell and the second micro-grid cell is opened and closed through a changeover switch
Hierarchical power control system.
The method according to claim 1,
Wherein the first microgrid cell further comprises a first sensor for sensing a power state of the first load,
Wherein the second microgrid cell further comprises a second sensor for sensing a power state of the second load,
The third micro-grid cell further includes a third sensor for sensing a power state of the third load,
The first to third sensors sense power states of the first to third loads, respectively, and transmit them to the cloud server
Hierarchical power control system.
3. The method of claim 2,
The cloud server includes:
Receiving at least one of weather data and power-related data from outside,
At least one of the power state of the first to third loads provided from the first to third sensors, and at least one of the climate data and the power related data provided from the outside,
And providing the analysis result to the middleware server
Hierarchical power control system.
The method of claim 3,
The middleware server provides the integrated control system with the analysis results and the real-time power status information provided from the first through third micro grid cells, respectively,
Wherein the integrated control system integrates and controls the power supply state of the first to third micro grid cells based on the analysis result provided from the middleware server and the real time power state information of the first to third micro grid cells
Hierarchical power control system.
The method according to claim 1,
The first ESS is capable of supplying uninterruptible power to the first load
Hierarchical power control system.
The method according to claim 1,
Wherein the first micro-grid cell comprises:
An emergency generator,
An STS (Static Transfer Switch) for opening and closing the connection between the system and the first ESS and the connection between the system and the first load,
Further comprising a first EMS (Energy Management System) for controlling the emergency generator and the first ESS
Hierarchical power control system.
The method according to claim 6,
During the system power failure,
The STS senses the system power failure, disconnects the system from the system,
The first ESS changes the drive mode from the constant power mode to the CVCF (constant voltage constant frequency) mode to supply power independently to the first load,
Wherein the first EMS drives the emergency generator when the first ESS is switched to the CVCF mode and supplies power independently to the first load,
The emergency generator being driven by the first EMS supplies power to the first load side,
The STS provides a first notification to the first ESS when power supplied by the emergency generator is sensed,
Wherein the first ESS, when receiving the first notification from the STS, performs a first synchronization algorithm,
The first synchronization algorithm is an algorithm for synchronizing the frequency, voltage and phase angle of the first ESS with the frequency, voltage and phase angle of the emergency generator
Hierarchical power control system.
8. The method of claim 7,
When the first synchronization algorithm of the first ESS is performed,
The STS releases the connection to the system,
The emergency generator is driven in a frequency tracking mode,
The first ESS is changed back to the constant power mode and driven
Hierarchical power control system.
9. The method of claim 8,
The systematic display,
The first EMS stops driving the emergency generator,
The STS senses a drive stop of the emergency generator and provides a second notification to the first ESS, disconnects the connection with the system again,
Wherein the first ESS changes the CVCF mode in the constant power mode and supplies power independently to the first load when receiving the second notification from the STS,
When power is supplied from the system to the first load side, the STS senses the power supplied by the system and provides a third notification to the first ESS,
The first ESS, upon receiving the third notification from the STS, performs a second synchronization algorithm,
If the first ESS performs the second synchronization algorithm, the STS deactivates the connection with the system again,
The second synchronization algorithm is an algorithm for synchronizing the frequency, voltage and phase angle of the first ESS with the frequency, voltage and phase angle of the system
Hierarchical power control system.
The method according to claim 6,
During the system power failure,
Wherein the first ESS and the emergency generator are connected to each other to supply power to the first load uninterruptedly,
Wherein the integrated control system determines a power budget value by calculating an allowable power and a deficit power of each of the first and second micro grid cells and provides the determined power budget value to the first micro grid cell through the middleware server doing
Hierarchical power control system.
11. The method of claim 10,
Wherein the first EMS receives the determined power value from the middleware server and delivers the determined power value to the first ESS,
The first ESS controls the charge amount of the battery based on the determined power availability value,
The integrated control system drives the changeover switch to connect the first micro-grid cell and the second micro-grid cell,
When the first micro grid cell and the second micro grid cell are connected, the first ESS supplies power to the second micro grid cell
Hierarchical power control system.
12. The method of claim 11,
Wherein the second load includes at least one load having a different priority,
Wherein the integrated control system determines the power budget value based on an amount of power remaining in the first micro grid cell and an amount of power shortage required in a load having a higher priority of the second load,
When the first micro grid cell and the second micro grid cell are connected, the first ESS supplies power to the high priority load of the second load
Hierarchical power control system.
The method according to claim 1,
During system power failure,
The first ESS is driven in a stand-alone operation mode to supply power to the first load uninterruptedly,
Wherein the integrated control system determines a power budget value by calculating an allowable power and a deficit power of each of the first and second micro grid cells and provides the determined power budget value to the first micro grid cell through the middleware server doing
Hierarchical power control system.
14. The method of claim 13,
Wherein the first micro grid cell includes a first EMS for unifying and controlling the first ESS and the first load,
Wherein the first EMS receives the determined power value from the middleware server and delivers the determined power value to the first ESS,
The first ESS controls the charge amount of the battery based on the determined power availability value,
The integrated control system drives the changeover switch to connect the first micro-grid cell and the second micro-grid cell,
When the first micro grid cell and the second micro grid cell are connected, the first ESS supplies power to the second micro grid cell
Hierarchical power control system.
15. The method of claim 14,
Wherein the second load includes at least one load having a different priority,
Wherein the integrated control system determines the power budget value based on an amount of power remaining in the first micro grid cell and an amount of power shortage required in a load having a higher priority of the second load,
When the first micro grid cell and the second micro grid cell are connected, the first ESS supplies power to the high priority load of the second load
Hierarchical power control system.
The method according to claim 1,
The conversion switch is any one of a transfer switch (TS), an STS, a back-to-back converter, and an automatic load transfer switch (ALTS)
Hierarchical power control system.
The method according to claim 1,
Wherein the power priority of the first load is higher than the power priority of each of the second load and the third load
Hierarchical power control system.
The method according to claim 1,
Wherein the first micro-grid cell comprises:
BEMS (Building Energy Management System)
A distribution board in communication with the BEMS,
A Building Automation System (BAS) for communicating with the BEMS,
An air conditioning system connected to the BAS,
A first distributed power system coupled to the BAS,
And a third ESS connected to the BAS,
The BEMS controls at least one of the cooling / heating system, the first distributed power system, and the third ESS through the BAS to reduce the peak load
Hierarchical power control system.
The method according to claim 1,
The second micro grid cell includes a second distributed power system operatively associated with the second ESS,
And a second EMS (Energy Management System) for controlling the second ESS and the second distributed power system
Hierarchical power control system.
The method according to claim 1,
The changeover switch
One end connected between the first ESS and the first load,
And the other end is connected between the second ESS and the second load
Hierarchical power control system.
A hierarchical power control system associated with a cloud server,
A first ESS (Energy Storage System) that is connected to the emergency generator and connected to the system through a CTTS (Closed Transition Transfer Switch); a first ESS (Energy Storage System) 1 < / RTI >load;
A second micro grid cell including a second ESS for managing a power state of the second load and the second load;
A third microgrid cell including a third load;
A middleware server communicating with the first through third micro grid cells; And
And an integrated control system that communicates with the middleware server and integrally controls the first through third micro grid cells,
The connection between the first micro-grid cell and the second micro-grid cell is opened and closed through a changeover switch
Hierarchical power control system.
22. The method of claim 21,
Wherein the first micro-grid cell comprises:
An STS for opening and closing a connection between the system and the first ESS and a connection between the system and the first load,
Further comprising a first EMS (Energy Management System) for controlling the emergency generator and the first ESS
Hierarchical power control system.
23. The method of claim 22,
During the system power failure,
The STS senses the system power failure, disconnects the system from the system,
The first ESS changes the drive mode from the constant power mode to the CVCF (constant voltage constant frequency) mode to supply power independently to the first load,
Wherein the first EMS drives the emergency generator when the first ESS is switched to the CVCF mode and supplies power independently to the first load,
When the emergency generator is activated, the CTTS connects the emergency generator to the STS while blocking the connection between the emergency generator and the grid,
Wherein the emergency generator is configured to supply power to the first load side,
The STS provides a first notification to the first ESS when power supplied by the emergency generator is sensed,
When the first ESS receives the first notification from the STS, it performs a first synchronization algorithm
Hierarchical power control system.
24. The method of claim 23,
When the first synchronization algorithm of the first ESS is performed,
The STS releases the connection to the system,
The emergency generator is driven in a frequency tracking mode,
The first ESS is changed back to the constant power mode and driven
Hierarchical power control system.
25. The method of claim 24,
The systematic display,
The first EMS stops driving the emergency generator,
The CTTS detects the stop of the operation of the emergency generator and connects the STS to the system while interrupting the connection between the emergency generator and the STS,
When the STS is connected to the system, the CTTS performs a synchronization algorithm for CTTS,
The synchronization algorithm for CTTS is an algorithm for synchronizing the frequency, voltage and phase angle of the first ESS with the frequency, voltage and phase angle of the system
Hierarchical power control system.
25. The method of claim 24,
The systematic display,
The first EMS stops driving the emergency generator,
The STS senses a drive stop of the emergency generator and provides a second notification to the first ESS, disconnects the connection with the system again,
Wherein the first ESS changes the CVCF mode in the constant power mode and supplies power independently to the first load when receiving the second notification from the STS,
When the first ESS is changed to the CVCF mode, the CTTS disconnects the connection between the emergency generator and the STS, connects the STS to the system,
When power is supplied from the system to the first load side, the STS senses the power supplied by the system and provides a third notification to the first ESS,
The first ESS, upon receiving the third notification from the STS, performs a second synchronization algorithm,
When the first ESS performs the second synchronization algorithm, the STS resumes the connection disconnection with the system,
When the connection to the system is interrupted again, the first ESS is changed from the CVCF mode to the constant power mode again,
The second synchronization algorithm is an algorithm for synchronizing the frequency, voltage and phase angle of the first ESS with the frequency, voltage and phase angle of the system
Hierarchical power control system.
A hierarchical power control system associated with a cloud server,
A first micro grid cell including a first ESS (Energy Storage System) having an uninterruptible power supply (UPS) structure and a first load managed by the first ESS;
A second micro grid cell including a second ESS for managing a power state of the second load and the second load;
A third microgrid cell including a third load; And
And an integrated control system that communicates with the first to third micro grid cells and integrally controls power supply states of the first to third micro grid cells,
The connection between the first micro-grid cell and the second micro-grid cell is opened and closed through a changeover switch
Hierarchical power control system.
28. The method of claim 27,
Wherein the first micro-grid cell comprises:
An emergency generator,
An STS (Static Transfer Switch) for opening and closing the connection between the system and the first ESS and the connection between the system and the first load,
Further comprising a first EMS (Energy Management System) for controlling the emergency generator and the first ESS
Hierarchical power control system.
A hierarchical power control system associated with a cloud server,
A first ESS (Energy Storage System) that is connected to the emergency generator and connected to the system through a CTTS (Closed Transition Transfer Switch); a first ESS (Energy Storage System) 1 < / RTI >load;
A second micro grid cell including a second ESS for managing a power state of the second load and the second load;
A third microgrid cell including a third load; And
And an integrated control system that communicates with the first through third micro grid cells and integrally controls the first through third micro grid cells,
The connection between the first micro-grid cell and the second micro-grid cell is opened and closed through a changeover switch
Hierarchical power control system.

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