KR20100013130A - Dc power supply and management system for house and method thereof - Google Patents

Abstract

PURPOSE: DC power supply and management system are provided to effectively manage the energy by installing a loading control part managing a peak load. CONSTITUTION: A digital watt-hour meter part(100) is connected with a power source and communications line lead-in part(600) through an optical communication. The digital watt-hour meter part is allocated an IP address. The digital watt-hour meter part confirms setting and operating information of the watt-hour meter through internet. A battery part(200) for storage performs a power storage function and discharging function according to the control command of the digital watt-hour meter. A solar power generation part(300) performs a generating function by using sunlight during the daytime. A loading control part(400) separates the load from circuit according to the control command of the digital watt-hour meter. The loading control part comprises a bus lines modem(405).

Description

DC power supply and management system for house and method

The present invention relates to the field of power generation. More specifically, it is possible to supply DC power directly to a load by connecting solar power and a battery, and install a load control unit capable of managing peak loads for efficient energy management in the premises. The present invention relates to a DC power supply and management system for homes and a method thereof.

As various digital apparatuses that operate as a direct current load requiring a direct current power source during operation are widely used and used, the proportion of the direct current load is very high in the total load used in a house.

Due to such an increase in the DC load, the demand for DC power is increasing, the current situation is to use the power conversion equipment included in the digital equipment to convert the AC power source is used as a DC power source.

However, when AC power is converted into DC power in this way, conversion loss occurs and power quality deteriorates. In addition, there is a problem that a power converter must be installed inside all digital devices.

Recently, due to the increase in international oil prices and environmental problems caused by the accelerated exhaustion of energy resources, the use of solar energy is increasing. Solar energy-related technologies continue to develop in line with the international expansion and expansion of renewable energy, which increases the possibility that solar housing will rapidly increase when the cost of installation and operation of solar power facilities decreases.

In the case of photovoltaic power generation, it is impossible to generate electricity at night, and the power output fluctuates depending on weather conditions even during the daytime, so that the battery is installed together with the photovoltaic power generation to store surplus power during the daylight hours. Doing. As battery capacity increases, prices fall, and lifespan continues, the number of battery combinations will continue to increase.

However, such battery combined technology has a limitation in efficient operation because weather information is not linked. In addition, despite the fact that the photovoltaic power generation and the output of the battery is a direct current power source, in order to supply power to a direct current load, the output of the battery is converted into an alternating current and then connected to the premises wiring, and the problem of being converted back into the direct current inside the digital device. There is.

If the direct current load generated by solar power and stored in a large capacity battery can be directly supplied to the direct current load, the environment can be improved not only by improving the power efficiency and power quality but also by removing the conversion equipment included in the digital device. The effect of reducing a problem can be obtained.

An object of the present invention is to meet the above technical problem, to provide a direct current DC power supply and management system for supplying direct current to a load in conjunction with solar power and a battery.

Another object of the present invention is to provide a DC power supply and management system for a house, which can be operated in a comprehensive manner by installing a load control unit capable of peak load management for efficient energy management in a premises.

As a means for achieving the above object, the configuration of the present invention has a structure that can be connected to the power supply and the communication line inlet by optical communication, the IP address is assigned, and the setting and operation information of the electricity meter can be confirmed through the Internet, Digital power meter unit for controlling the on-premises power generation device and load according to the network operation algorithm, a storage battery unit for storing or discharging power according to the control command of the digital power meter, and using the solar power during the daytime A solar power generation unit capable of transmitting power generation information to a digital electricity meter and a load control unit having a bus modem built in to open or close the circuit in order to disconnect or connect the load in accordance with the control command of the digital electricity meter.

In the configuration of the present invention, the power supply and the communication line inlet unit is supplied to the digital power meter unit by using a pole transformer and a power converter of the power company, so that the power is supplied to the house, the power supply information, the weather It is desirable to have a structure that provides information to the digital power meter.

The configuration of the present invention, the digital electricity meter unit, a measuring unit for measuring the amount of power supplied from the power company through the power supply and the communication line inlet, a processor for performing the output and load control of the distributed distributed power in the premises, the power under the control of the processor The main power switch that opens and closes the power supply from the company, the optical cable connection modem for receiving power outage information and weather information from the power company through the optical splitter, and the wireless modem for transmitting the control commands of the processor to the distributed power supply and the load. It is preferable to include.

According to one aspect of the present invention, the storage battery unit includes a storage battery for storing electrical energy supplied from the solar power generation unit, a connection switch connected to the storage battery, and a battery for controlling the connection switch. And a management system, a battery output DC voltage converter for converting the DC power stored in the storage battery into DC voltage and outputting the same, and a wireless modem for transmitting output and operation information of the storage battery. Do.

According to a configuration of the present invention, the load control unit includes a connection switch having a current transformer CT installed therein, a control device for controlling the connection switch, and a wireless modem for receiving a control command from the digital electricity meter. It is made to include.

As another means of achieving the above object, another configuration of the present invention, receiving power failure information and weather information from the power company, and measuring and storing the amount of power supplied from the power company by using the measurement unit, monthly of the customer It saves the daily power usage pattern, and based on this, estimates the daily and hourly load usage, and automatically prepares the power generation and storage system operation plan for each time, and then outputs the output information of the solar power generation unit and the storage battery. Receiving and comparing the solar output information and the estimated load usage for each time zone, and transmits a control command to the bus modem of each part to control the opening and closing operation of the main power switch, storage battery connection switch, load controller operation switch By using an external power source or charging and discharging the battery and carrying out load control, If smaller, the main power switch is turned off to cut off the supply of commercial power to the premises, supplying power to the load through the output of the solar power generation unit and charging the rechargeable battery, and the load exceeds the solar output. In other words, when the solar output is not enough to supply power to the full load, driving the storage battery unit so that power is supplied from the storage battery, and the load is distributed by comparing the output of the load and the distributed power supply If larger than the power supply, the step of disconnecting some loads by opening the load control switch; if the load is not greater than the distributed power supply, if the power supply for the remaining load is not possible, turn on the main power switch to supply the commercial power. It comprises the step of supplying.

As a means for achieving the above object, another configuration of the present invention includes estimating the amount of solar power generation and load the next day after obtaining the next day's power outage plan or weather information from the electric power company, and estimating the estimated generation amount When the load is exceeded, the main power switch is cut off to supply the power currently charged to the battery, and the power is supplied to the night time load using only the battery, and the load is greater than the battery output by comparing the load with the battery output. If it is determined, the main power switch is turned on, the battery is charged while supplying commercial power to the premises, and when the estimated power generation is less than the estimated load, the main power switch is turned on to supply the commercial power to the load in the night time zone, the next weekly time zone. Charging the battery for power supply.

The present invention, by connecting the solar power generation and the battery can directly supply the DC power to the load, the load control unit capable of peak load management for efficient energy management in the premises can be installed and operated comprehensively, Have

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings in order to describe in detail enough to enable those skilled in the art to easily carry out the present invention. . Other objects, features, and operational advantages, including the object, operation, and effect of the present invention will become more apparent from the description of the preferred embodiment.

For reference, the embodiments disclosed herein are only presented by selecting the most preferred embodiment in order to help those skilled in the art from the various possible examples, the technical spirit of the present invention is not necessarily limited or limited only by this embodiment Rather, various changes, additions, and changes are possible within the scope without departing from the spirit of the present invention, as well as other equivalent embodiments.

1 is a block diagram of a DC power supply and management system for homes according to an embodiment of the present invention.

As shown in FIG. 1, the configuration of a DC power supply and management system for a house according to an embodiment of the present invention may include optical power to a power source and a communication line inlet unit 600 and the power source and a communication line inlet unit 600. It is connected to the IP address and has a structure that can check the setting and operation information of the electricity meter through the Internet, the digital electricity meter unit 100 that can control the premises power generator and the load according to the established low-voltage network operating algorithm, Storage battery unit 200 for storing or discharging power according to the control command of the digital electricity meter 100, and solar power that can be generated by using sunlight in the daytime and transmit power generation information to the digital electricity meter 100. Loaded by the power generation unit 300 and the control command of the digital watt-hour meter 100, the load containing the bus modem 405 to disconnect or connect the load from the circuit It comprises a fisherman 400.

In FIG. 1, the solid line represents the low voltage DC wiring, and the dotted line represents the signal line.

The power source and the communication line inlet unit 600, the power supply is supplied to the digital power meter unit 100 by using the pole transformer 603 and the power converter 601 of the power company to supply power to the house, The distributor 602 is configured to provide power failure information and weather information to the digital power meter 100.

The digital power meter 100 includes a measurement unit 101 for measuring the amount of power supplied from a power company through a power converter 601, a processor 104 for performing output and load control of distributed premises distributed power, and A main power switch 102 for opening and closing the power supply from the power company under the control of the processor 104, an optical cable connection modem 103 for receiving power failure information and weather information from the power company through the optical distributor 602; It includes a wireless modem 105 for transmitting the control command of the processor 104 to the distributed power supply and the load.

The DC power meter 100 is connected to the low-voltage DC supply line converted to direct current on the secondary side of the columnar transformer 600 to measure the amount of power supplied to the premises, and is directly connected to the optical cable introduced into the premises from the power company Power failure information and weather information can be obtained, and the built-in program is designed to efficiently operate the energy in the premises by controlling the batteries installed in the premises, solar power generation and load with a wireless modem.

The digital electricity meter 100 collects a power outage plan from a power company and reflects the energy management plan in the premises, and performs wireless communication with the storage battery unit 200, the solar power generation unit 300, the load control unit 400, and the like. By controlling the operation through the current, and the current information transmitted from the load control unit 400 to monitor the health of the load at all times, it is made of a structure that can monitor the status of the main load early detection of the abnormal power system premises and accident It is structured to prevent the occurrence.

In addition, the digital electricity meter 100 may be directly connected to the optical cable and assigned an IP so as to check the DC power and load control algorithm and the operation state included in the digital electricity meter 100 through the web.

The storage battery unit 200 may include a storage battery 203 for storing electrical energy supplied from the solar power generation unit 300 and a connection switch 201 connected to the storage battery 203. And a battery management system 204 for controlling the connection switch 201 and a battery output DC voltage converter 202 for converting and outputting DC power stored in the storage battery 203 into DC voltage. And a wireless modem 205 for transmitting output and driving information of the storage battery 203.

The storage battery unit 200 serves to supply power to the load when it is charged in the late night time and the solar light output is reduced during the free time. That is, the storage battery unit 200 is charged with surplus power of photovoltaic power generation during the day time, and is responsible for power supply at night time when solar power generation is not possible, and charges at night time when it is impossible to fully charge during the day time zone. By doing so, the next day, the photovoltaic generation is configured to provide power for the excess load.

The battery management system 204 of the storage battery unit 200 transmits the output and operation information of the storage battery 203 wirelessly to the digital power meter unit 100 through the wireless modem 205, the power meter unit ( In accordance with the control command from 100, the storage battery 203 is configured to perform charging or discharging. The charging and discharging of the storage battery 203 is implemented through a manipulation of the connection switch 201.

The photovoltaic unit 300 includes a photovoltaic panel 306 for converting solar energy into electrical energy and outputting the same, and a rechargeable battery for temporarily charging the electrical energy of the photovoltaic panel 306 ( 303, a DC voltage converter 302 for converting the electrical energy of the rechargeable battery 303 into a DC voltage, and outputting the DC voltage converter 302; a connection switch 301 connected to the DC voltage converter 302; It comprises a control system 304 for controlling the switch 301, and a wireless modem 305 for transmitting power generation information.

The photovoltaic unit 300 generates power during the day time and the produced DC power supplies the DC constant voltage directly to the load through the rechargeable battery 303 or the surplus power is used for storing the battery unit 200 for storage. The battery 203 is supplied. Then, the wireless modem 305 is configured to wirelessly transmit power generation information to the digital power meter 100.

Since the output of the photovoltaic panel 306 of the photovoltaic unit 300 is not constant, the photovoltaic panel 306 supplies power temporarily charged to the rechargeable battery 303 to the load, and the power generation information is transmitted from the control system 304. It is made of a structure that is delivered to the processor 104 of the digital power meter 100 through the bus modem 305.

The load control unit 400 includes a connection switch 401, a control device 404 for controlling the connection switch 401, and a wireless modem for receiving a control command from the digital electricity meter 100. 405).

The load control unit 400 is configured to be installed at the front end of the load required for power peak control of the variability in the premises load, and separate the specific load to reduce the peak when the output of the photovoltaic power generation and storage device is insufficient Installed for input and made of a configuration that operates in accordance with the control command of the digital power meter 100.

The load control unit 400 receives a control command from the digital electricity meter 100 through the wireless modem 405 and cuts off the load connected to the premises wiring by opening and closing the connection switch 401 according to the received control command. Made of structure.

A current transformer CT is installed inside the connection switch 401 of the load control unit 400 to measure the amount of current load supplied to the load when the connection switch 401 is turned on, and the controller 404 Acquisition and transfer to the processor 104 of the digital power meter 100 through a wireless modem (405).

The home PC 500 is configured to be able to query the operation setting state of the distributed power supply and load controller in the premises and the data stored in the digital electricity meter 100 on the web, and to change the operation conditions.

With the above configuration, the operation of the home DC power supply and management system according to an embodiment of the present invention is as follows.

2 is a flowchart illustrating the operation of the DC power management algorithm in the daytime zone of the DC power supply and management method for the home.

First, the processor 104 of the digital electricity meter 100 receives power failure information and weather information from the power company through the optical splitter 602 (S10), and is supplied from the power company using the measurement unit 101. Measures and stores the amount of electricity, and stores the monthly / daily power usage pattern of the customer, and based on this, it estimates the daily and hourly load usage (S11). Since the power drawn into the premises from the distribution line is AC, it is converted into direct current through a converter such as a column transformer 603 and a power converter 601 at the front end of the digital power meter 100 and is connected to the digital power meter 100. .

Next, the processor 104 of the digital electricity meter 100 automatically generates a power generation and storage system operation plan for each time zone, and then outputs information of the solar power generation unit 300 and the storage battery 200 to the bus modem 105. ), And compares the photovoltaic output information received from the control system 304 of the photovoltaic generation unit 300 with the estimated load usage for each time zone (S12), and sends a control command to the bus modem of each part (205). Control the opening and closing operations of the main power switch 102, the storage battery connection switch 201, and the load controller operation switch 401 by transmitting to the 305 and 405. To perform.

If the load is less than the output of the photovoltaic unit 300, that is, the output of the photovoltaic unit 300 is sufficient to supply power to the full load, the processor 104 of the digital power meter 100 Open the main power switch 102 (off) to cut off the premises supply of commercial power supplied from the power source and the communication line inlet 600 (S13), supplying power to the load only by the output of the solar power generation unit 300 While charging the storage battery 203 of the storage battery unit 200.

On the contrary, when the load exceeds the output of the photovoltaic unit 300, that is, when the output of the photovoltaic unit 300 is not sufficient to supply power to the full load, the digital power meter unit 100 The processor 104 drives the battery management system 204 of the storage battery unit 200 to turn on the battery opening / closing switch 201 to supply power to the load from the storage battery 203 (S15).

Next, the processor 104 of the digital power meter 100 compares the load amount and the output amount of the distributed power supply (S16).

When the load amount is larger than the distributed power supply, that is, when power is not supplied to the entire load even after all the distributed power supplies are applied, the processor 104 of the digital power meter 100 may control the control device 404 of the load control unit 400. By opening the load control switch 401 to cut off the power supply of some of the load (S18).

On the contrary, when the load is not greater than the distributed power supply, when power cannot be supplied to the remaining load (S17), the processor 104 of the digital power meter 100 inputs the main power switch 102 to supply power and communication lines. Commercial power from the inlet unit 600 is supplied to the premises (S19).

3 is a flowchart illustrating an operation of a DC power management algorithm in a night time zone of a DC power supply and management method for a house.

First, the processor 104 of the digital electricity meter 100 receives the power failure plan or weather information from the power company through the optical distributor 602 of the power supply and the communication line inlet 600 (S20), and the next day The amount of power generation and the load are estimated (S21).

When the estimated power generation amount exceeds the estimated load (S22), the processor 104 of the digital power meter unit 100 is to supply the load currently charged in the storage battery 203 of the storage battery unit 200 to the load. In order to cut off the main power switch 102 (S25), only the output of the storage battery 203 supplies power to the night time load (S26). In this process, the processor 104 of the digital power meter 100 compares the output of the storage battery 203 with the load (S27), and if it is determined that the load is greater than the output of the storage battery 203, that is, for storage. When it is determined that the output of the battery 203 is lowered below the load amount, the main power switch 102 is turned on (S28), and the storage battery 203 is charged while supplying commercial power to the premises (S29).

On the contrary, when the estimated power generation amount is smaller than the estimated load (S22), the processor 104 of the digital power meter 100 inputs the main power switch 102 to the load of the power source and the communication line inlet 600 to the load in the night time zone. While supplying commercial power (S28), the storage battery 203 is charged for power supply in the next weekly time zone (S29).

As described above, the present invention is a technology that is highly utilized in the case of receiving direct DC power in the premises by increasing the spread of digital devices, and it is possible to configure an optimal system for supplying the DC power in the premises, and commercial power Minimize the use of and maximize the use of distributed power. In addition, it is possible to efficiently control the distributed power supply installed in the premises, and it is necessary to effectively operate the distributed power supply by collecting power failure information and weather information of the power company through the digital electricity meter.

In addition, by directly supplying the DC power to the load of the digital device, it is possible to reduce the loss due to power changes and to remove the conversion equipment inside the digital device. In addition, by supplying a DC power supply in conjunction with a battery, high-precision digital devices such as PCs can be operated without stopping for a predetermined time even in the event of power failure or power quality deterioration due to a problem of commercial power supplied to the premises.

In addition, when the distributed power and digital loads installed in the house are increased, the application of DC low voltage wiring is expected to be expanded, thereby maximizing the efficiency of the distributed power, thereby building energy-independent houses. In addition, it is necessary to efficiently control the distributed power supply installed in the premises and to operate the distributed power supply by collecting the power failure information and weather information of the power company through the digital electricity meter 100.

1 is a block diagram of a DC power supply and management system for homes according to an embodiment of the present invention.

2 is a flowchart illustrating the operation of the DC power management algorithm in the daytime zone of the DC power supply and management method for the home.

3 is a flowchart illustrating an operation of a DC power management algorithm in a night time zone of a DC power supply and management method for a house.

Claims (7)

It is connected to the power and communication line inlet by optical communication, has an IP address assigned to it, and has the structure to check the setting and operation information of the electricity meter through the Internet, and can control the power generator and load in the premises according to the established low voltage network operation algorithm. Digital power meter, A storage battery unit for storing or discharging power according to a control command of the digital electricity meter; Solar power generation unit that can be generated by using the solar power during the daytime and transmit the power generation information to the digital electricity meter, DC power supply and management system for a house, characterized in that it comprises a load control unit having a bus modem to open and close according to the control command of the digital electricity meter to disconnect or connect the load from the circuit. The method of claim 1, The power supply and the communication line inlet unit, the power supply to the digital power meter unit by using a pole transformer and power converter of the power company to supply power to the house, and provides power failure information and weather information to the digital power meter unit using the optical splitter DC power supply and management system for a house, characterized in that consisting of a structure. The method of claim 1, The digital power meter unit, A measuring unit measuring an amount of power supplied from a power company through a power supply and a communication line inlet; A processor that performs output and load control of the distributed power supplies in the premises; A main power switch for opening and closing a power supply from a power company under control of the processor; Optical cable connection modem for receiving power outage information and weather information from power company through optical splitter, DC power supply and management system for a home, characterized in that it comprises a wireless modem for transmitting the control command of the processor to the distributed power supply and load. The method of claim 1, The storage battery unit, A storage battery for storing electrical energy supplied from the solar power generation unit; A connection switch connected to the storage battery; A battery management system for controlling the connection switch; A battery output DC voltage converter for converting and outputting DC power stored in the storage battery into DC voltage; DC power supply and management system for a house, characterized in that it comprises a wireless modem for transmitting the output and driving information of the storage battery. The method of claim 1, The load control unit, A connection switch with a current transformer CT installed therein, A control device for controlling the connection switch; DC power supply and management system for a house, characterized in that it comprises a wireless modem for receiving a control command from the digital electricity meter. The step of receiving power outage information and weather information from the power company, and measure and store the amount of power supplied from the power company by using the measurement unit, and stores the monthly / daily power usage pattern of the customer, based on the daily and time zone After estimating the load usage, and automatically preparing the operation and storage system operation plan for each time zone, the output information of the solar power generation unit and the storage battery is received to compare the solar power output information with the estimated load usage for each time zone. And controlling the opening and closing of the main power switch, the storage battery connection switch, and the load controller operation switch by transmitting the control command to the bus modem of each part to perform the use of external power or charge and discharge of the battery and control the load. Step and if the load is less than the solar output, open the main power switch Disconnecting the power supply, supplying power to the load at the output of the solar power generation unit, charging the rechargeable battery, and if the load exceeds the solar output, that is, the solar output is not sufficient to supply the full load. If not, driving the storage battery unit so that power is supplied from the storage battery; and comparing the load amount with the output amount of the distributed power supply, when the load amount is larger than the distributed power supply, opening the load control switch to cut off some loads. And if the load is not greater than the distributed power supply, supplying commercial power to the premises by inserting a main power switch when the power supply is not possible for the remaining load. And management system. After obtaining the next day's power outage plan or weather information from the utility company, estimating the amount of photovoltaic power generation and load the next day, and if the estimated power generation exceeds the estimated load, Turning off the main power switch and supplying power to the night time load with only the battery, and comparing the battery output and the load, if it is determined that the load is greater than the battery output, turn on the main power switch and supply the commercial power to the premises. And charging the battery for supplying power during the daytime while supplying commercial power to the load during the night time by inputting the main power switch when the estimated generation amount is smaller than the estimated load. DC power supply and management method for home.

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