CN204559220U - Wind light mutual complementing power-supply controller and micro-grid system - Google Patents

Abstract

The utility model discloses a wind-solar complementary power supply controller and a micro-grid system, which belongs to the technical field of distributed power generation of the micro-grid system. The utility model aims to solve the problems of low resource utilization efficiency of the micro-grid and unconnected power to the grid. The technical scheme adopted is: wind-solar hybrid power supply controller includes over-current protection device Ⅰ, over-current protection device Ⅱ, voltage conversion module Ⅰ, voltage conversion module Ⅱ, DC low-voltage bus, voltage conversion module Ⅲ, output terminal, reverse power protector , Voltage conversion module IV, DC high-voltage bus, DC/DC step-down conversion module I, DC/DC step-up conversion module I, DC/DC step-down conversion module II, DC/DC step-up conversion module, battery Phase group, control unit. The micro-grid system is built with a wind-solar hybrid power supply controller.

Description

Wind-solar hybrid power supply controller and microgrid system

technical field

The utility model relates to the technical field of distributed power generation of a micro-grid system, in particular to a wind-solar complementary power supply controller and a micro-grid system.

Background technique

Energy is an important material basis for national economic development and people's life. The energy system based on fossil fuels such as coal, oil, and natural gas has brought serious environmental pollution and ecosystem damage. In recent years, countries around the world have begun to control and alleviate the deteriorating environment according to their national conditions, and regard the development and utilization of renewable and pollution-free new energy as an important content of sustainable development. The wind-solar hybrid power generation system is a new type of energy power generation system with high cost performance that utilizes the complementarity of wind energy and solar energy resources, and has a good application prospect. The wind-solar hybrid power generation system uses solar photovoltaic power generation arrays and wind generators to store the electricity generated in the battery pack. When the user needs electricity, the inverter converts the DC power stored in the battery pack into AC power and sends it to the battery pack through the transmission line. user load. It is wind power generator and solar photovoltaic power generation array two kinds of power generation equipment to generate electricity together. As a micro or small power generation system, wind-solar hybrid has been widely used in street lighting, intelligent transportation, forestry, water resource monitoring and other industries. the

Microgrid is a new type of network structure, which is a system unit composed of a group of micro power sources, loads, energy storage systems and control devices. Microgrid is an autonomous system capable of self-control, protection and management, which can be connected to the external grid or run in isolation. Microgrid is a concept relative to the traditional large power grid. It refers to a network composed of multiple distributed power sources and their related loads according to a certain topology, and is connected to the conventional power grid through static switches. The development and extension of microgrids can fully promote the large-scale access of distributed power sources and renewable energy sources, and realize the highly reliable supply of various energy forms for loads. Smart grid transition. At present, wind-solar hybrid power generation has been applied in the micro-grid system, and achieved good results.

However, the current application of the existing micro-grid system is mainly for systems with large power, and there is a lack of targeted solutions for ultra-miniature and low-power micro-grid systems. The step-up system is separated, and multiple step-up and step-down and AC-DC conversion reduce the utilization efficiency of photovoltaic/wind resources; 2) The step-up and grid connection of distributed wind-solar hybrid power generation systems are generally centralized, which cannot be solved. For example: along the expressway Issues such as grid connection of power generation in application scenarios such as distributed whole-process monitoring; 3) The existing low-power wind-solar hybrid power supply controller generally operates independently at each load, and the generated power is not connected to the grid. Once the battery pack is damaged, lead to system paralysis. If the generated power exceeds the load, the excess power can only be discharged through the unloading unit, and the system performance and price ratio is not high.

Utility model content

The technical task of the utility model is to solve the problems of low utilization efficiency of resources of the micro-grid and unconnected power to the grid by providing a wind-solar complementary power supply controller and a micro-grid system aiming at the above deficiencies.

Technical task of the present utility model is realized in the following manner,

Wind-solar hybrid power supply controller, the input end includes reverse power protector and overcurrent protection device I, overcurrent protection device II; overcurrent protection device I and overcurrent protection device II are respectively connected to the The DC low-voltage bus, the DC low-voltage bus is connected to the output terminal through the voltage conversion module III; the reverse power protector is connected to the DC high-voltage bus through the voltage conversion module IV; the DC high-voltage bus and the DC low-voltage bus are lapped with DC/DC step-down Conversion module Ⅰ, DC/DC step-up conversion module Ⅰ; the DC low-voltage busbars are respectively connected to the DC/DC step-down conversion module Ⅱ, and the DC/DC step-up conversion module Ⅱ is connected to the battery pack; the control unit is respectively connected and Control voltage conversion module Ⅰ, voltage conversion module Ⅱ, voltage conversion module Ⅲ, voltage conversion module Ⅳ, DC/DC step-down conversion module Ⅰ, DC/DC step-up conversion module Ⅰ, DC/DC step-down conversion module Ⅱ , DC/DC DC step-up conversion module II, the control unit is also connected with a communication module and a display module.

In the wind-solar complementary power supply controller, the DC/DC step-down conversion module I is used to obtain energy from the high-voltage DC bus when the energy of the DC low-voltage bus is insufficient; the DC/DC boost conversion module I is used to obtain energy from the DC low-voltage bus. Charge to the high-voltage DC bus when there is excess; DC/DC DC step-down conversion module II is used for the DC low-voltage bus to charge the battery pack; DC/DC DC boost conversion module II is used for the battery pack to discharge the DC low-voltage bus.

The wind-solar hybrid power supply controller, the overcurrent protection device I and the overcurrent protection device II are all connected to the unloading unit, and the unloading unit is used to protect the wind-solar hybrid power supply controller when there is excess energy; the positive and negative of the DC low-voltage bus A large-capacity capacitor is lapped between the poles, and the large-capacity capacitor provides energy storage for the temporary power failure of the system; the battery pack is connected to the fast charging unit, and the fast charging unit is used to obtain temporary energy from the outside of the wind-solar hybrid power supply controller to supply the battery pack .

In the wind-solar complementary power supply controller, the voltage conversion module I, the voltage conversion module II, and the voltage conversion module III are all DC/DC direct current voltage conversion modules; the voltage conversion module IV is an AC/DC voltage conversion module or a DC/DC direct current Voltage conversion module, when the input terminal of the reverse power protector is powered by AC, the voltage conversion module IV is an AC/DC voltage conversion module, when the input terminal of the reverse power protector is powered by DC, the voltage conversion module IV is DC/DC DC voltage Transform module.

The wind-solar complementary power supply controller, the control unit adopts a controller, the controller is used to judge and control the energy flow, the communication module includes a wireless communication module, a wired communication module, the controller, the wireless communication module, the wired communication module and the display module constitute a human body machine interface.

A microgrid system uses any of the above-mentioned wind-solar hybrid power supply controllers to form a micro-grid system. The remote power supply network is connected, and the wind turbine and the photovoltaic array are respectively connected to the overcurrent protection device I and the overcurrent protection device II; the output end is connected to the electric load to provide energy input for the electric load.

The microgrid system uses any of the wind-solar hybrid power supply controllers mentioned above to form a micro-grid system. The micro-grid system uses at least two wind-solar hybrid power supply controllers; the reverse power protector at the input end of one wind-solar hybrid power supply controller is connected to the market The wind power generator and the photovoltaic array are connected to the input end in each wind-solar hybrid power supply controller, that is, the wind power generator and the photovoltaic array are connected to the overcurrent protection device I and the overcurrent protection device II respectively. Connection; the output end is connected to the electric load to provide energy input for the electric load; the DC high-voltage bus is used for the interconnection between various wind-solar hybrid power supply controllers.

The wind-solar complementary power supply controller and the micro-grid system of the utility model have the following advantages:

(1) The wind-solar complementary power supply controller constitutes the man-machine interface of the system through the communication module and the display module. Multiple wind-solar complementary discharge controllers can form a communication network through this man-machine interface. Users can use this man-machine interface Or the communication network monitors and controls each wind-solar hybrid power supply controller in real time, providing an interface for further off-site monitoring of the microgrid system;

(2) The wind-solar hybrid power supply controller solves the limitation that each power generation unit of the micro-grid system can only operate independently, and cannot be connected to each other for grid-connected operation and complement each other. Two or more wind-solar hybrid power supply controllers can Interconnected and grid-connected operation; when some power generation equipment or battery packs fail, each wind-solar hybrid power supply controller can supplement each other's energy without affecting the normal operation of the entire micro-grid system, which not only improves the utilization efficiency of wind-solar hybrid power generation, It also improves the reliability of the micro-grid system; in addition, when two or more wind-solar hybrid power supply controllers are connected to each other and run in parallel with the grid, they can also be connected to the mains network or other remote power supply networks to use external power as power generation The backup energy of the system, when the power generation is insufficient and/or the energy storage of the battery pack is insufficient, energy is obtained from the backup energy, which further improves the reliability of the power generation system;

(3) The wind-solar hybrid power supply controller can also operate independently like the traditional small and micro wind-solar complementary discharge controller, but the energy flow mode is different from the traditional one. Capacitor charging of the low-voltage DC bus. After the capacitor charging is completed, the energy is first used by the electric load equipment, and the excess part is charged to the battery pack through voltage conversion; when the generated power is insufficient, energy is supplemented from the battery pack; this structure avoids In addition, when the battery pack is damaged or offline due to other reasons, as long as the generated power is greater than the load demand, the microgrid system can still Normal operation, for the use of electric loads; this feature has more obvious advantages when multiple wind-solar hybrid power supply controllers are connected to the grid, which greatly makes up for the defects of traditional distributed wind-solar hybrid power generation systems. Monitoring, environmental protection, It is especially obvious in the application of forest fire monitoring and other systems. The battery pack is damaged in one fell swoop, causing all monitoring systems to stop running. The improvement is that as long as the power generation energy is sufficient, the system can still operate.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Accompanying drawing 1 is the circuit structure block diagram of wind-solar complementary power supply controller;

Attached Figure 2 is a block diagram of the circuit structure of the microgrid system;

Accompanying drawing 3 is the circuit structure block diagram of microgrid system.

The dotted arrows in the figure represent the direction of energy flow.

Detailed ways

With reference to the accompanying drawings and specific embodiments, the wind-solar hybrid power supply controller and micro-grid system of the present utility model will be described in detail below.

Example 1:

The wind-solar complementary power supply controller of the utility model, the input terminal includes a reverse power protector, an overcurrent protection device I, and an overcurrent protection device II; Module Ⅱ is connected to the DC low-voltage bus, and the DC low-voltage bus is connected to the output terminal through the voltage conversion module Ⅲ; the reverse power protector is connected to the DC high-voltage bus through the voltage conversion module Ⅳ; the DC high-voltage bus and the DC low-voltage bus are lapped with DC/ DC step-down conversion module Ⅰ, DC/DC step-up conversion module Ⅰ; the DC low-voltage busbars are respectively connected to the DC/DC step-down conversion module Ⅱ, DC/DC step-up conversion module Ⅱ and the battery pack; control The units are respectively connected to and control voltage conversion module Ⅰ, voltage conversion module Ⅱ, voltage conversion module Ⅲ, voltage conversion module Ⅳ, DC/DC step-down conversion module Ⅰ, DC/DC step-up conversion module Ⅰ, DC/DC step-down voltage conversion module II, DC/DC boost conversion module II, and the control unit is also connected with a communication module and a display module.

Example 2:

As shown in Figure 1, the wind-solar hybrid power supply controller of the utility model, the input end includes a reverse power protector, an overcurrent protection device I, and an overcurrent protection device II; The conversion module Ⅰ and the voltage conversion module Ⅱ are connected to the DC low-voltage bus, and the DC low-voltage bus is connected to the output terminal through the voltage conversion module Ⅲ; the reverse power protector is connected to the DC high-voltage bus through the voltage conversion module Ⅳ; the connection between the DC high-voltage bus and the DC low-voltage bus There are DC/DC step-down conversion module Ⅰ and DC/DC step-up conversion module Ⅰ lapped between them; The battery packs are connected to each other; the control unit is respectively connected to and controls voltage conversion module Ⅰ, voltage conversion module Ⅱ, voltage conversion module Ⅲ, voltage conversion module Ⅳ, DC/DC step-down conversion module Ⅰ, DC/DC step-up conversion module Ⅰ , DC/DC step-down conversion module II, DC/DC step-up conversion module II, and the control unit is also connected with a communication module and a display module.

DC/DC step-down conversion module Ⅰ is used to obtain energy from the high-voltage DC bus when the energy of the DC low-voltage bus is insufficient; DC/DC DC boost conversion module Ⅰ is used to charge the high-voltage DC bus when the energy of the DC low-voltage bus is excessive; DC The /DC DC step-down conversion module II is used for the DC low-voltage bus to charge the battery pack; the DC/DC DC boost conversion module II is used for the battery pack to discharge the DC low-voltage bus.

Both the overcurrent protection device I and the overcurrent protection device II are connected to the unloading unit, and the unloading unit is used to protect the wind-solar hybrid power supply controller when there is excess energy; a large-capacity capacitor is lapped between the positive and negative poles of the DC low-voltage bus, The large-capacity capacitor provides energy storage for the temporary power failure of the system; the battery pack is connected to the fast charging unit, and the fast charging unit is used to obtain temporary energy from the outside of the wind-solar hybrid power supply controller to supply the battery pack.

Voltage conversion module Ⅰ, voltage conversion module Ⅱ, and voltage conversion module Ⅲ are all DC/DC direct current voltage conversion modules; voltage conversion module Ⅳ is an AC/DC voltage conversion module or a DC/DC direct current voltage conversion module, which acts as a reverse power protector When the input end is powered by AC, the voltage conversion module IV is an AC/DC voltage conversion module; when the input end of the reverse power protector is powered by DC, the voltage conversion module IV is a DC/DC voltage conversion module.

The control unit adopts a controller, the controller is used to judge and control the energy flow, the communication module includes a wireless communication module, a wired communication module, and the controller, wireless communication module, wired communication module and display module form a man-machine interface.

Example 3:

As shown in Figure 2, the micro-grid system of the present utility model adopts any kind of wind-solar complementary power supply controller integrated with the above-mentioned embodiment 1 or embodiment 2 or different technical features in the claims to form a micro-grid system, The microgrid system adopts a wind-solar hybrid power supply controller; the reverse power protector at the input end of the wind-solar hybrid power supply controller is connected to the mains network or remote power supply network, and the wind turbine and the photovoltaic array are connected to the overcurrent protection device I and the overcurrent protection device respectively. The current protection device II is connected; the output end is connected to the electric load to provide energy input for the electric load.

The power supply method of the microgrid system is based on the microgrid system using a wind-solar hybrid power supply controller for power supply, including the following steps:

(1) The initial state of the wind-solar hybrid power supply controller has the following four states:

(1.1), the energy output of the mains network or remote power supply network is zero, the output of wind turbines and photovoltaic arrays is zero, and the energy storage of battery packs is zero;

(1.2), the energy output of the mains network or remote power supply network is zero, the output of wind turbines and photovoltaic arrays is zero, and the battery pack has energy storage;

(1.3), the energy output of the mains network or the remote power supply network is zero, at least one of the wind turbine and the photovoltaic array has energy output, and the battery pack has energy storage;

(1.4), the mains network or remote power supply network has energy output, at least one of the two wind turbines and photovoltaic arrays has energy output, and the battery pack has energy storage;

(2) If it is the state (1.1), the battery pack is charged through the fast charging unit, then it will be converted to the state (1.2);

(3) If it is in the state (1.2), the battery pack is discharged, and the DC low-voltage bus passes through the DC/DC step-up conversion module II to the DC low-voltage bus, and the DC low-voltage bus passes through the voltage conversion module III to the output terminal to provide energy input for the electrical load; control The unit monitors whether the voltage conversion module Ⅰ, voltage conversion module Ⅱ, and voltage conversion module Ⅳ have energy input, and the state is transferred to state (1.3) or state (1.4) according to the input;

(4), if it is in the state (1.3), it will enter offline independent operation;

(5) If it is in the state (1.4), enter online independent operation.

In the above-mentioned microgrid system power supply method, in step (4), the offline independent operation process is as follows:

(4.1), the control unit compares the output energy Qout of the wind generator or/and photovoltaic array with the energy Qload consumed by the electric load;

(4.2) If Qout>Qload, the electricity generated by the wind turbine or/and photovoltaic array is consumed by the load, and the excess energy is charged to the battery pack through the DC/DC step-down conversion module II through the DC low-voltage bus; The control unit monitors the status of the battery pack, and after the charging is completed, the excess energy is discharged through the unloading unit;

(4.3) If Qout≤Qload, the power generated by the wind turbine or/and photovoltaic array will be consumed by the load, and the insufficient part will be discharged by the battery pack, and will be transferred to the DC low-voltage bus through the DC/DC DC step-up conversion module II. The low-voltage bus provides energy input to the electrical load through the voltage conversion module III to the output terminal;

(4.4), if Qout≤Qload, and it is monitored that the state of the storage battery reaches a critical state, the wind-solar hybrid power supply controller closes the energy output to the electric load until the wind-solar hybrid power supply controller restores the state (1.2), state (1.3 ) or state (1.4);

In step (5), the online independent operation process is as follows:

(5.1), the control unit compares the output energy Qout of the wind generator or/and photovoltaic array with the energy Qload consumed by the electric load;

(5.2) If Qout>Qload, the electricity generated by the wind turbine or/and the photovoltaic array will be consumed by the load, and the excess energy will charge the battery pack through the DC low-voltage bus through the DC/DC step-down conversion module II; The control unit monitors the status of the battery pack, and after the charging is completed, the excess energy is discharged through the unloading unit;

(5.3) If Qout≤Qload, the power generated by the wind turbine or/and the photovoltaic array will be consumed by the load, and the insufficient part will be discharged by the battery pack, and will be transferred to the DC low-voltage bus through the DC/DC DC step-up conversion module II, and the DC The low-voltage bus provides energy input to the electrical load through the voltage conversion module III to the output terminal;

(5.4) If Qout≤Qload, and it is detected that the state of the battery pack reaches a critical state, the wind-solar hybrid power supply controller will turn on the output of the mains network or remote power supply network, through the reverse power protector, through the voltage conversion module IV, DC /DC DC step-down conversion module Ⅰ to the DC low-voltage bus, through the voltage conversion module Ⅲ to the output terminal to provide energy input to the electrical load; at the same time, the DC low-voltage bus charges the battery pack through the DC/DC DC step-down conversion module Ⅱ; control The unit monitors the state of the battery pack, and after the charging is completed, the control unit controls to shut down the charging of the battery pack, and the mains network or remote power supply network only supplements the running energy of the electric load at this time;

(5.5) If the monitoring unit detects that Qout>Qload, turn off the energy output of the mains network or the remote power supply network, and turn back to (5.2).

Example 4:

As shown in Figure 3, the micro-grid system of the present utility model adopts any kind of wind-solar hybrid power supply controller integrated with the above-mentioned embodiment 1 or embodiment 2 or different technical features in the claims to form a micro-grid system, The microgrid system uses at least two wind-solar hybrid power supply controllers; the reverse power protector at the input end of one of the wind-solar hybrid power supply controllers is connected to the mains network or remote power supply network. In each wind-solar hybrid power supply controller, the wind turbine Connect with the photovoltaic array to the input end, that is, the wind turbine and the photovoltaic array are respectively connected to the overcurrent protection device I and the overcurrent protection device II; the output end is connected to the electric load to provide energy input for the electric load; the DC high-voltage bus is used It is interconnected between various wind-solar hybrid power supply controllers.

The power supply method of the micro-grid system is based on the micro-grid system using at least two wind-solar hybrid power supply controllers for power supply. , including the following steps:

(1) The initial state of the wind-solar hybrid power supply controller has the following four states:

(1.1), the energy output of the mains network or remote power supply network is zero, the energy output of the DC high-voltage bus is zero, the output of wind turbines and photovoltaic arrays is zero, and the energy storage of battery packs is zero;

(1.2), the energy output of the mains network or remote power supply network is zero, the energy output of the DC high-voltage bus is zero, the output of wind turbines and photovoltaic arrays is zero, and the battery pack has energy storage;

(1.3), the energy output of the mains network or remote power supply network is zero, the energy output of the DC high-voltage bus is zero, at least one of the wind turbine and the photovoltaic array has energy output, and the battery pack has energy storage;

(1.4), the mains network or remote power supply network has energy output, the DC high-voltage bus energy has energy output, at least one of the wind turbine and photovoltaic array has energy output, and the battery pack has energy storage;

(2) If it is the state (1.1), the battery pack is charged through the fast charging unit, then it will be converted to the state (1.2);

(3) If it is in the state (1.2), the battery pack is discharged, and the DC low-voltage bus passes through the DC/DC step-up conversion module II to the DC low-voltage bus, and the DC low-voltage bus passes through the voltage conversion module III to the output terminal to provide energy input for the electrical load; control The unit monitors whether the voltage conversion module Ⅰ, voltage conversion module Ⅱ, and voltage conversion module Ⅳ have energy input, and the state is transferred to state (1.3) or state (1.4) according to the input;

(4). If it is in state (1.3), it will enter offline independent operation. The offline independent operation process is as follows:

(4.1), the control unit compares the output energy Qout of the wind generator or/and photovoltaic array with the energy Qload consumed by the electric load;

(4.2) If Qout>Qload, the electricity generated by the wind turbine or/and photovoltaic array is consumed by the load, and the excess energy is charged to the battery pack through the DC/DC step-down conversion module II through the DC low-voltage bus; The control unit monitors the state of the battery pack, and after the charging is completed, the excess energy is transmitted from the DC low-voltage bus to the DC high-voltage bus through the DC/DC boost conversion module I, and is used by the remaining wind-solar hybrid power supply controllers;

(4.3) If Qout≤Qload, the power generated by the wind turbine or/and photovoltaic array will be consumed by the load, and the insufficient part will be discharged by the battery pack, and will be transferred to the DC low-voltage bus through the DC/DC DC step-up conversion module II. The low-voltage bus provides energy input to the electrical load through the voltage conversion module III to the output terminal;

(4.4), if Qout≤Qload, and it is monitored that the state of the storage battery reaches a critical state, the wind-solar hybrid power supply controller closes the energy output to the electric load until the wind-solar hybrid power supply controller restores the state (1.2), state (1.3 ) or state (1.4);

(5) If it is in the state (1.4), it will enter the online grid-connected operation, and the online grid-connected operation process is as follows:

(5.1), the control unit compares the output energy Qout of the wind generator or/and photovoltaic array with the energy Qload consumed by the electric load;

(5.2) If Qout>Qload, the electricity generated by the wind turbine or/and the photovoltaic array will be consumed by the load, and the excess energy will charge the battery pack through the DC low-voltage bus through the DC/DC step-down conversion module II; The control unit monitors the state of the battery pack, and after the charging is completed, the excess energy is transmitted from the DC low-voltage bus to the DC high-voltage bus through the DC/DC boost conversion module I, and is used by the remaining wind-solar hybrid power supply controllers;

(5.3) If Qout≤Qload, the power generated by the wind turbine or/and the photovoltaic array will be consumed by the load, and the insufficient part will be discharged by the battery pack, and will be transferred to the DC low-voltage bus through the DC/DC DC step-up conversion module II, and the DC The low-voltage bus provides energy input to the electrical load through the voltage conversion module III to the output terminal;

(5.4), if Qout≤Qload, and the state of the battery pack is monitored to reach a critical state, the energy of the DC high-voltage bus is delivered to the DC low-voltage bus through the DC/DC step-down conversion module Ⅰ, and the DC low-voltage bus passes through the voltage conversion module Ⅲ To the output terminal to provide energy input to the electric load;

At the same time, the DC low-voltage bus charges the battery pack through the DC/DC DC step-down conversion module II; the control unit monitors the state of the battery pack, and after the charging is completed, the control unit controls to turn off the charging of the battery pack, and the DC high-voltage bus only supplements electricity load operating energy;

(5.5). If the monitoring unit detects that Qout>Qload, then turn off the energy output of the DC high-voltage bus and turn back to (5.2).

Through the above specific implementation methods, those skilled in the art can easily realize the utility model. However, it should be understood that the present invention is not limited to the specific implementation manners described above. On the basis of the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features, so as to realize different technical solutions.

Claims (6)

1. The wind-solar hybrid power supply controller is characterized in that the input end includes a reverse power protector, an overcurrent protection device I, and an overcurrent protection device II; The conversion module Ⅱ is connected to the DC low-voltage bus, and the DC low-voltage bus is connected to the output terminal through the voltage conversion module Ⅲ; the reverse power protector is connected to the DC high-voltage bus through the voltage conversion module Ⅳ; the DC high-voltage bus and the DC low-voltage bus are lapped with DC /DC DC step-down conversion module Ⅰ, DC/DC DC step-up conversion module Ⅰ; the DC low-voltage busbars are respectively connected to the DC/DC DC step-down conversion module Ⅱ, and the DC/DC DC step-up conversion module Ⅱ is connected to the battery pack; The control unit is respectively connected to and controls voltage conversion module Ⅰ, voltage conversion module Ⅱ, voltage conversion module Ⅲ, voltage conversion module Ⅳ, DC/DC step-down conversion module Ⅰ, DC/DC step-up conversion module Ⅰ, DC/DC direct current The step-down conversion module II, the DC/DC step-up conversion module II, and the control unit are also connected with a communication module and a display module. 2. The wind-solar hybrid power supply controller according to claim 1, characterized in that the overcurrent protection device I and the overcurrent protection device II are both connected to the unloading unit; the positive and negative poles of the DC low-voltage bus are lapped with large-capacity capacitors ;The battery pack is connected to the quick charging unit. 3. The wind-solar hybrid power supply controller according to claim 1, characterized in that the voltage conversion module I, the voltage conversion module II, and the voltage conversion module III are all DC/DC DC voltage conversion modules; the voltage conversion module IV is AC/DC The voltage conversion module is a DC/DC direct current voltage conversion module. 4. The wind-solar hybrid power supply controller according to claim 1, wherein the control unit adopts a controller, and the communication module includes a wireless communication module and a wired communication module, and the controller, the wireless communication module, the wired communication module and the display module constitute a human body machine interface. 5. A micro-grid system, characterized in that a wind-solar hybrid power supply controller is used in any one of claims 1-4 to form a micro-grid system, and the micro-grid system adopts a wind-solar hybrid power supply controller; The reverse power protector at the input end of the wind-solar hybrid power supply controller is connected to the mains network or remote power supply network, and the wind generator and photovoltaic array are respectively connected to the over-current protection device I and over-current protection device II; the output end is connected to Electric loads provide energy input to electric loads. 6. A micro-grid system, characterized in that the micro-grid system is formed by using any one of the wind-solar hybrid power supply controllers in claims 1-4, and the micro-grid system uses at least two wind-solar hybrid power supply controllers; The reverse power protector at the input end of one of the wind-solar hybrid power supply controllers is connected to the mains network or remote power supply network, In each wind-solar hybrid power supply controller, the wind generator and the photovoltaic array are connected to the input end, that is, the wind generator and the photovoltaic array are respectively connected to the overcurrent protection device I and the overcurrent protection device II; the output end is connected to the electric load, Provide energy input to electrical loads; The DC high-voltage bus is used for the interconnection between various wind-solar hybrid power supply controllers.