WO2019192040A1

WO2019192040A1 - Wind-photovoltaic-diesel intelligent alternating current microgrid system

Info

Publication number: WO2019192040A1
Application number: PCT/CN2018/084549
Authority: WO
Inventors: 王瑶; 王泽芳; 刘小强; 李青春; 徐海峰; 陈光平
Original assignee: 江苏金润龙科技股份有限公司
Priority date: 2018-04-26
Filing date: 2018-04-26
Publication date: 2019-10-10

Abstract

A wind-photovoltaic-diesel intelligent alternating current (AC) microgrid system, comprising a wind turbine, a photovoltaic power generation array, a diesel generator, an energy storage device, and a load and microgrid energy management platform. An electrical energy output end of the wind turbine is connected to an AC power input end of an AC/direct current (DC)/AC converter, and an output end of the AC/DC/AC converter is connected to a microgrid AC busbar; an electrical energy output end of the photovoltaic power generation array is connected to an input end of a DC/AC converter, and an output end of the DC/AC converter is connected to the microgrid AC busbar; an electrical energy output end of the diesel generator is connected to the microgrid AC busbar; an electrical energy output end of the energy storage device is connected to an input end of a DC/DC converter, and an output end of the DC/DC converter is connected to a DC busbar; an electrical energy output end of the DC busbar is connected to the input end of the DC/AC converter, and the output end of the DC/AC converter is connected to the microgrid AC busbar; the microgrid AC busbar is connected to a point of common coupling (PCC) by means of a grid-connected switch, and is connected to the load and microgrid energy management platform; the microgrid energy management platform is further connected to the wind turbine, the photovoltaic power generation array, the diesel generator, and the energy storage device to implement information transmission. The system interconnects the wind turbine, the photovoltaic power generation array, the diesel generator, the energy storage device, and the load and microgrid energy management platform, can implement a grid-connected operation and an independent operation, and can also implement seamless switch between the grid-connected operation and the independent operation; power balance between the power supply and the load can be implemented; the microgrid energy management platform having energy management and scheduling functions is configured, so that power fluctuations caused by wind power, photovoltaic and load changes, etc. can be quickly smoothed.

Description

Scenery firewood intelligent exchange microgrid system

Technical field

The invention relates to the technical field of an alternating current microgrid system, in particular to a wind and light diesel intelligent exchange microgrid system.

Background technique

With the large-scale popularization of mobile communications, many communication operators around the world continue to increase investment in hardware facilities, mainly by increasing communication coverage by increasing communication base stations. As far as China is concerned, as of June 2017, the number of 4G base stations alone exceeded 3.28 million, and the number of 4G communication network users exceeded 800 million. The role of the communication base station power supply is to provide DC power to the communication equipment of the base station, which is an important part of the communication network infrastructure. The power supply mode of the base station can be divided into two types: for the communication base station that is closer to the power grid, the utility power can be delivered. In order to ensure the reliability, the joint power supply mode of the utility power and the diesel generator is generally adopted, that is, in the case of the commercial power supply. When the mains supply is interrupted, the battery is powered by the battery for a period of time. The maintenance personnel of the base station arrives within the specified time to start the power supply of the diesel generator; for the communication base station established in a remote area far from the power grid, due to the distance And the cost and other factors limit, the city power can not be delivered, mostly using local direct power generation, the most common is the use of diesel generators to provide independent power. Both of the above power supply methods consume a large amount of electric energy and fuel, which brings a large operating cost to operators. According to statistics, our national base station energy consumption accounts for about 90% of the energy consumption of the entire mobile communication network equipment. At present, about 30% of the communication operators' operating expenses are used for electricity expenses, and the operator's base station consumes tens of billions of electricity per year. On the other hand, traditional diesel power generation requires a large amount of expensive and non-renewable fossils. Raw materials, and will cause environmental and noise pollution, in addition, diesel generators have poor overload capability.

In order to comply with the national energy conservation and emission reduction strategy, reduce the operating costs of communication operators, and improve the energy saving and environmental protection performance of communication base stations, the optimal choice is to change the existing power supply mode of the base station and make full use of clean renewable energy such as wind energy and solar energy to generate electricity. , building a green communication base station. Wind energy and solar energy are natural green resources that can be used free of charge. They are inexhaustible, have no pollution, no radiation, and are characterized by clean, safe and sustainable use. At present, new energy sources such as wind energy and solar energy have been obtained. The rapid development has become an important guarantee for the world countries to cope with energy crisis, environmental pollution, global warming and sustainable development. However, wind energy and solar energy are restricted by natural environment, seasonal changes, day and night alternation, etc., and have strong randomness and intermittentness. Therefore, only wind and solar energy are used to supply power to the communication base station, which will cause large fluctuations in power supply system power. Therefore, it seriously affects the safe and stable operation of the system and the safe use of the base station load. Another solution is to increase the load of the communication base station by adding a wind storage, optical storage or wind and light storage combined power generation system composed of energy storage devices. Although the energy storage device has improved power fluctuation suppression, it cannot be fundamentally complete. To solve the above problems, especially in the case of continuous rain or windless weather, wind and photovoltaic can not generate electricity, and battery storage is limited, load power supply interruption, and in order to stabilize the power fluctuation of wind power and photovoltaic power generation, the energy storage unit will appear. Frequent charging and discharging seriously affects the service life of the communication base station. Therefore, this power supply solution cannot meet the requirements for the safety and reliability of the power supply of the communication base station. In addition, the suppression of power fluctuations relies on a large increase in energy storage equipment to achieve, thereby increasing the cost of the power supply system and the economy is poor.

How to connect diesel generators, wind turbines and photovoltaic power generation systems into the distribution network in the form of smart microgrids, forming diesel generators, wind turbines, photovoltaic cells, energy storage devices, power electronic energy conversion devices, related loads and The micro-grid energy management and monitoring and protection devices are combined to form a smart electric storage micro-grid system, which is a problem that needs to be solved to replace the traditional diesel generator set.

Summary of the invention

The technical problem to be solved by the invention is to provide a wind power diesel intelligent exchange micro-grid system, which can realize self-control, protection and management, can be operated in parallel with an external power grid, or can be operated on an island, mainly for medium and low voltage distribution networks. Users in the system, as well as users in islands, rural and remote areas, provide solutions for electricity use.

In order to solve the above technical problems, the technical solution adopted by the present invention is:

Scenery firewood intelligent exchange microgrid system, including wind turbine, photovoltaic array, diesel generator, energy storage device, load and microgrid energy management platform,

Wherein the power output end of the wind power generator is connected to an AC power input end of the AC/DC/AC converter, and the power output end of the photovoltaic power generation array is connected to an input end of the DC/AC converter, the diesel generator The power output terminal is connected to the micro grid AC bus;

The output end of the AC/DC/AC converter and the output end of the DC/AC converter are both connected to the micro-grid AC bus;

The power output end of the energy storage device is connected to the input end of the DC/DC converter, the output end of the DC/DC converter is connected to the DC bus, and the power output end of the DC bus is connected to the input of the DC/AC converter. End, the output of the DC/AC converter is connected to the micro-grid AC bus;

The micro-grid AC bus is connected to a common connection point PCC through a grid-connected switch, the micro-grid AC bus connection load and a micro-grid energy management platform; the micro-grid energy management platform is also connected with a wind power generator, a photovoltaic power generation array, and a diesel power generation The machine is connected to the energy storage device to realize information transmission.

Further, the left side of the DC/DC converter is connected to a DC bus, and the right side of the DC/DC converter is connected to an energy storage device, and the DC/DC converter is also connected to the bidirectional DC/DC converter controller. The bidirectional DC/DC converter controller implements PWM control for the DC/DC converter.

Further, the left side of the DC/AC converter is connected to the micro grid AC bus, and the right side of the DC/AC converter is connected to the output of the photovoltaic array to realize DC to AC conversion and power point tracking, the DC The /AC converter is also coupled to a DC/AC converter controller that implements PWM control of the DC/AC converter.

Further, the AC/DC/AC converter is divided into a machine side converter and a grid side converter, the machine side converter is used for controlling the generator active power and the reactive power, and the grid side converter is used for controlling the micro. Grid AC bus voltage; the left side of the AC/DC/AC converter is connected to the micro grid AC bus, the right side of the AC/DC/AC converter is connected to the wind generator, and the AC/DC/AC converter The machine side converter is also connected to the machine side converter controller, and the grid side converter of the AC/DC/AC converter is also connected to the grid side converter controller.

Further, the microgrid energy management platform includes a power market electricity price information collection module, a microgrid energy management platform information processing module, an environmental parameter acquisition module, a microgrid optimization calculation control module, a load prediction module, and a power prediction module, wherein the power The output of the market electricity price information collection module and the environmental parameter acquisition module is connected with the input end of the information processing module of the microgrid energy management platform, and the output of the load prediction module and the power prediction module is connected with the input end of the micro network optimization calculation control module. The network energy management platform information processing module and the microgrid optimization calculation control module are bidirectionally connected; the output of the microgrid optimization calculation control module is also connected to the wind power generator, the diesel generator, the photovoltaic power generation display, the energy storage device and the load, the wind power generator, The diesel generator, the photovoltaic power generation array and the energy storage device are all connected with the input end of the power prediction module, and the load is connected with the input end of the load prediction module; the microgrid energy management platform is also connected with the distribution network information center by two-way communication, the distribution network The output of the information center is also connected to the electricity market. The electricity price information collection module is connected.

Preferably, the wind power generator comprises a doubly-fed wind turbine and a direct drive wind turbine.

Preferably, the energy storage device is one or more of a battery and a super capacitor.

The beneficial effects of the invention are:

1. Connect wind turbines, photovoltaic arrays, diesel generators, energy storage devices, loads and microgrid energy management platforms to achieve grid-connected operation, independent operation, and seamless integration between the two. Switch. When the grid is connected, the voltage, frequency, phase angle and phase sequence of the microgrid should be matched with the grid. The deviation of the above parameters is satisfied: the voltage deviation ΔU is within ±10%, and the frequency deviation Δf is within ±0.4 Hz. δ is within ±10°.

2. The active power and reactive power at the grid connection point of the microgrid and the main power grid are controllable and adjustable when connected to the grid; during independent operation, the active and reactive outputs of the micro power supply can be continuously adjusted according to the change of the load to maintain the communication. The bus frequency and voltage are within the specified range.

3. Connect wind turbines, photovoltaic arrays, diesel generators and energy storage devices to the microgrid AC bus by DC/DC converter, DC/AC converter and AC/DC/AC converter as power electronic energy conversion equipment On, the power balance between the power supply and the load is achieved.

4, equipped with micro-grid energy management platform, with energy management and scheduling functions, can quickly smooth power fluctuations caused by wind power, photovoltaic and load changes.

The invention is further described in detail below with reference to the accompanying drawings.

DRAWINGS

1 is a schematic diagram of a topological structure of a smart light storage micro-grid system of the present invention;

2 is a schematic diagram of a topological structure of a DC/DC converter in a wind power diesel intelligent AC microgrid system according to the present invention;

3 is a schematic top view showing the topology of a DC/AC or AC/DC converter in a smart electric storage micro-grid system of the present invention;

4 is a schematic top view showing the topology of an AC/DC/AC converter in a wind power diesel intelligent AC microgrid system according to the present invention;

FIG. 5 is a system block diagram of a microgrid energy management platform in a smart light storage micro-grid system of the present invention.

detailed description

In order to further understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The following examples are only intended to more clearly illustrate the technical solutions of the present invention, and are not intended to limit the scope of the present invention.

As shown in FIG. 1 , the intelligent light storage micro-grid system of the present invention comprises a wind power generator, a photovoltaic power generation array, a diesel generator, an energy storage device, a load and a micro-grid energy management platform,

Wherein, the power output end of the wind power generator is connected to the AC power input end of the AC/DC/AC converter, the power output end of the photovoltaic power generation array is connected to the input end of the DC/AC converter, and the power output end of the diesel generator is connected to the micro power grid. AC bus

The output of the AC/DC/AC converter and the output of the DC/AC converter are connected to the microgrid AC bus;

The power output end of the energy storage device is connected to the input end of the DC/DC converter, the output end of the DC/DC converter is connected to the DC bus, and the power output end of the DC bus is connected to the input end of the DC/AC converter, DC/AC conversion The output of the device is connected to the micro-grid AC bus;

The microgrid AC bus connects to the common connection point PCC through the grid connection switch, the microgrid AC bus connection load and the microgrid energy management platform; the microgrid energy management platform is also connected with the wind turbine, photovoltaic array, diesel generator and energy storage device. To achieve information transmission.

As shown in Fig. 2, it is a topology of a bidirectional DC/DC converter (DC/DC converter). The left side is the high voltage side, the DC bus is connected, and the right side is the low voltage side, and the energy storage device is connected. When the energy is flowing forward, it works in the step-down state to charge the right energy storage device; when the energy flows in the opposite direction, it works in the boost state, and the right energy storage device discharges.

As shown in FIG. 2, the output end of the power transistor S1 is connected in series with the input end of the inductor, the power transistor S2 is connected in parallel between the power transistor S1 and the inductor, and the capacitor C is connected in parallel with the output end of the inductor. The DC/DC converter is also coupled to a bidirectional DC/DC converter controller that implements PWM control of the DC/DC converter.

As shown in Figure 3, for the topology of the inverter/rectifier (DC/AC or AC/DC converter), the inverter/rectifier (DC/AC or AC/DC converter) is used for the interface of the two functions. First, it is used for photovoltaic grid-connected inverters. The left side is connected to the micro-grid AC bus, the right side is connected to the output of the photovoltaic array, which realizes the DC-to-AC conversion and power point tracking. The second is used to realize the internal communication in the micro-grid. The two-way flow of the side and DC side energy, the energy flows in the forward direction, works in the rectification state, the energy storage device is charged; the energy flows in the reverse direction, the operation is in the inverter state, and the energy storage device discharges.

As shown in Figure 3, the three phases A, B, and C of the microgrid AC bus are connected in series with an inductor L and a resistor R. The output of the resistor R has three sets of power transistors and capacitors C in parallel, and the output terminal is connected to a DC bus or a photovoltaic array. . The DC/AC converter is also coupled to a DC/AC converter controller that implements PWM control of the DC/AC converter.

As shown in Figure 4, the topology of the back-to-back converter (AC/DC/AC converter) is divided into a machine-side converter and a grid-side converter. The machine-side converter is used to control the generator active power and none. Power, grid-side converter is used to control the DC bus voltage; the left side of the AC/DC/AC converter is connected to the micro-grid AC bus, the right side of the AC/DC/AC converter is connected to the wind turbine, and the wind turbine includes double Feed-type wind turbines and direct-drive wind turbines. The machine-side converter of the AC/DC/AC converter is also connected to the machine-side converter controller, and the grid-side converter of the AC/DC/AC converter is also connected to the grid-side converter controller.

As shown in Figure 4, the three phases A, B, and C of the micro-grid AC bus are connected in series with an inductor L and a resistor R. The output terminals of the resistor R are connected in parallel with three sets of power transistors and capacitors C to form a grid-side converter; The output end is connected in parallel with the three sets of power transistors on the right side to form a machine-side converter, and the output end is connected to the wind power generator.

In the present invention, a bidirectional DC/DC converter controller, a DC/AC converter controller, a machine side converter controller of an AC/DC/AC converter, and a grid side converter of an AC/DC/AC converter The controller adopts TMS320F28335 high-precision floating-point DSP. In the wind power diesel intelligent AC microgrid system of the present invention, the power balance between the power source and the load is realized by the above-mentioned converter controller.

As shown in Figure 5, for the topology of the microgrid energy management platform, decisions are made based on energy demand, load conditions, market information, and operational constraints, such as wind turbines, photovoltaic arrays, diesel generators, and energy storage. Flexible scheduling of devices and loads to achieve optimal operation of the system.

Among them, including electricity price information collection, environmental parameter collection, information processing, load forecasting, power forecasting, optimization calculation control, and communication with the distribution network information center. The electricity price information collection module can upload the electricity price information to the information processing module in real time. The environmental parameter acquisition module uploads parameters such as real-time wind speed and sunshine intensity in the micro-grid wind power and photovoltaic system to the information processing module for analysis. The information processing module analyzes and processes the electricity price parameter, the environmental information and the weather forecast information obtained through the distribution network information center, and then uploads it to the micro network optimization calculation control module, and optimizes the calculation control module to combine the load prediction and the power prediction, and the piconet The optimization calculation control module uses multi-objective (operational efficiency, system environmental benefit and other objectives) optimization algorithms to calculate the control quantity, charge and discharge, load and micro-power of diesel generators, wind turbines and photovoltaic arrays. The operating mode of the network is controlled.

Load forecasting needs to collect long-term load change information, and predict the load information at the next moment by curve fitting or interpolation method and upload it to the micro-network optimization calculation control module. At the same time, the load forecast also needs to upload load change information and load plan change information in real time. Similarly, power prediction needs to make power prediction based on the annual operating force status of diesel generators, wind turbines, and photovoltaic arrays, and environmental parameter changes in the next few days. Generally, the load prediction and power prediction data update intervals are minutes.

The installation location and rated capacity of diesel generators, wind turbines and photovoltaic arrays will affect the system short-circuit current, voltage distribution of the distribution network, voltage stability and so on. Reasonable generator installation position and set capacity can effectively improve distribution network voltage, reduce system active network loss, and increase system load rate. Therefore, in the present invention, the optimization variables selectable when performing the optimization calculation include the number, location, and capacity of the diesel generator, the wind power generator, and the photovoltaic power generation array. In addition, it is also possible to consider certain evaluation variables (such as network loss, environmental benefits, etc.) in conjunction with the grid to jointly determine the best optimization goals. At the same time, various equipments in the system also need to meet various operational constraints and system constraints. The whole micro-network optimization design problem can be transformed into multi-objective optimization model, and the appropriate solving algorithms such as analytical method and intelligent evolutionary algorithm are used to solve the problem. Corresponding all or partial optimal solutions.

In the present invention, the power generation equipment includes a diesel generator, a wind power generator, and a photovoltaic power generation array. The diesel generator set is a kind of small-scale power generation equipment. It uses diesel fuel as the fuel and diesel engine as the prime mover to drive the generator to generate electricity. The diesel generator set is a non-continuous operation power generation equipment. If it is continuously operated for more than 12 hours, its output power will be lower than the rated power by about 90%. Wind turbines include wind turbines, gearboxes, generators, back-to-back converters and their control units, steering mechanisms, brake mechanisms, towers, etc., where wind turbines and generators are the main energy conversion components. At present, wind turbines mainly include two types of doubly-fed and direct-drive types. Both wind turbines can realize decoupling control of variable-speed constant frequency and power. The difference lies in converter capacity and system topology, direct drive type. Permanent magnet synchronous generators are used in wind power systems. The converter capacity and generator capacity are equivalent. The system has no gearbox. The doubly-fed wind power system uses doubly-fed induction generators. The converter capacity is only slip. The generator capacity is doubled (about 0.3 times) and the system has a gearbox. The photovoltaic power generation system is composed of photovoltaic power generation array and photovoltaic grid-connected inverter. The output power of the photovoltaic power generation array is affected by factors such as sunshine intensity and junction temperature of the power generation board. Therefore, the maximum power point needs to be tracked. In addition, the output of the photovoltaic power generation array is In the present invention, the photovoltaic array is connected to the microgrid AC bus of the AC microgrid through an inverter (DC/AC converter), and the DC power generated by the PV array is converted into AC power to supply power to the load.

In the present invention, the energy storage device is a very critical device in the AC microgrid system. Because of the randomness and intermittent nature of wind and solar energy, wind power and photovoltaic power generation are difficult to balance the demand of real-time and load. Adding energy storage devices to the AC microgrid system can quickly smooth power fluctuations caused by wind power, photovoltaics and load changes. . There are many types of energy storage devices, and batteries and super capacitors are two common types. As the main energy storage equipment in the microgrid, the battery has the characteristics of low manufacturing cost, mature production technology and high energy conversion efficiency. According to the nature of work and storage methods, batteries can be divided into lead-acid batteries, lead-crystal batteries, nickel-cadmium batteries, lithium batteries and so on. Among them, the valve-regulated lead-acid battery commonly used in lead-acid batteries is often used in places where high power is provided in a short time, and has the advantages of stable working voltage, simple structure, small internal resistance, good starting performance and low price; supercapacitor ( Supercapacitor, also known as Electrical Doule-Layer Capacitor, is an electrochemical component that stores energy by polarizing an electrolyte. Supercapacitors do not undergo chemical reactions during energy storage. This energy storage process is reversible, so it can perform hundreds of thousands of cycles of charging. The large current with capacitor has a fast charge and discharge characteristic, and also has the energy storage characteristics of the battery. When discharging, the electrons are released from the moving conductor to supply power to the device. The supercapacitor has the characteristics of small size, capacity, fast charging speed (95% of rated capacity can be achieved in 10 seconds of charging), over-voltage is not broken down, and the charging and discharging circuit is simple. Therefore, it can be used as an internal power type energy storage unit of the microgrid to smooth power fluctuations in the network. Based on the advantages of the above two energy storage devices, the present invention selects a battery and a super capacitor as the energy storage device.

In summary, the present invention is a smart electric storage micro-grid system:

2. The active power and reactive power at the grid connection point of the microgrid and the main power grid are controllable and adjustable when connected to the grid. During independent operation, the active and reactive outputs of the micro power supply can be continuously adjusted according to the change of the load to maintain the busbar. The frequency and voltage are within the specified range.

5. The power quality indicators in the microgrid mainly include: harmonic and waveform distortion, voltage fluctuation and flicker, DC injection, voltage imbalance, voltage deviation, and frequency. The above indicators are in line with the corresponding provisions in China's power quality standards GB/T 12325-2008, GB/T 14549-1993, GB/T 15945-2008, GB/T 12326-2008, GB/T 15543-2008.

6, can be configured with a dedicated relay protection device; real-time monitoring, display and recording of the load, generator and energy storage device access to the microgrid, with local monitoring and remote monitoring.

It should be noted that the above-mentioned embodiments are illustrative and not limiting of the technical solutions of the present invention, and equivalent replacements by other persons skilled in the art or other modifications according to the prior art, as long as the technical solutions of the present invention are not exceeded. And the scope should be included in the scope of the claims as claimed.

Claims

The wind and light diesel intelligent exchange micro-grid system is characterized by: wind power generator, photovoltaic power generation array, diesel generator, energy storage device, load and micro-grid energy management platform,

Wherein the power output end of the wind power generator is connected to an AC power input end of the AC/DC/AC converter, and the power output end of the photovoltaic power generation array is connected to an input end of the DC/AC converter, the diesel generator The power output terminal is connected to the micro grid AC bus;

The output end of the output end of the AC/DC/AC converter is connected to the micro-grid AC bus, and the output end of the DC/AC converter connected to the photovoltaic power generation array is connected to the micro-grid AC bus;

The power output end of the energy storage device is connected to the input end of the DC/DC converter, the output end of the DC/DC converter is connected to the DC bus, and the power output end of the DC bus is connected to the input of the DC/AC converter. End, the output of the DC/AC converter is connected to the micro-grid AC bus;

The micro-grid AC bus is connected to a common connection point PCC through a grid-connected switch, the micro-grid AC bus connection load and a micro-grid energy management platform; the micro-grid energy management platform is also connected with a wind power generator, a photovoltaic power generation array, and a diesel power generation The machine is connected to the energy storage device to realize information transmission.
The wind power diesel intelligent AC microgrid system according to claim 1, wherein a DC bus of the DC/DC converter is connected to the DC bus, and a right side of the DC/DC converter is connected to the energy storage device. The DC/DC converter is also connected to a bidirectional DC/DC converter controller, and the bidirectional DC/DC converter controller implements PWM control for the DC/DC converter.
The wind power diesel intelligent AC microgrid system according to claim 1, wherein the left side of the DC/AC converter is connected to the micro grid AC bus, and the right side of the DC/AC converter is connected to the photovoltaic array. The output is DC-to-AC conversion and power point tracking. The DC/AC converter is also connected to a DC/AC converter controller, and the DC/AC converter controller implements PWM control for the DC/AC converter.
The wind power diesel intelligent AC microgrid system according to claim 1, wherein the AC/DC/AC converter is divided into a machine side converter and a grid side converter, and the machine side converter is used for control. Generator active power and reactive power, grid side converter is used to control the micro grid AC bus voltage; the left side of the AC/DC/AC converter is connected to the micro grid AC bus, the AC/DC/AC converter Connect the wind turbine to the right.
The wind and light storage intelligent exchange microgrid system according to any one of claims 1 to 4, wherein the microgrid energy management platform comprises a power market electricity price information collection module, a microgrid energy management platform information processing module, and an environment. The parameter acquisition module, the micro network optimization calculation control module, the load prediction module and the power prediction module, wherein the output of the electricity market electricity price information collection module and the environmental parameter acquisition module is connected with the input end of the information processing module of the microgrid energy management platform, the load The output of the prediction module and the power prediction module is connected to the input end of the micro-network optimization calculation control module, and the information processing module of the micro-network energy management platform is bidirectionally connected with the micro-network optimization calculation control module; the output of the micro-network optimization calculation control module is also connected. Wind turbines, diesel generators, photovoltaic power generation displays, energy storage devices and loads, wind turbines, diesel generators, photovoltaic arrays and energy storage devices are all connected to the input of the power prediction module, the input of the load and load prediction module End connection; microgrid energy management platform and distribution network Message center connected to two-way communication, the output of distribution network connected to the information center further electricity market price information collection module.
The wind power diesel intelligent AC microgrid system according to claim 5, wherein the wind power generator comprises a doubly-fed wind power generator and a direct drive wind power generator.
The wind and light diesel intelligent AC microgrid system according to claim 5, wherein the energy storage device is one or more of a battery and a super capacitor.