Wind-solar-storage coordinated voltage control system

Abstract

The invention relates to the technical field of new energy power generation and voltage cooperative control, and discloses a wind-solar-storage cooperative voltage control system, which comprises a wind power generation module, a photovoltaic power generation module, a hybrid energy storage system and an intelligent control center, voltage fluctuation is monitored in real time through the intelligent control center, and a charging and discharging strategy of the hybrid energy storage system is dynamically adjusted according to the voltage fluctuation condition, so that the power grid voltage stability is maintained, and the power supply quality is ensured; the intelligent control center adopts a multi-objective optimization algorithm to accurately predict wind power and photovoltaic power generation power, and combines an energy storage state to optimize a charging and discharging instruction. According to the invention, a multi-level cooperative control architecture is constructed, the energy storage response is optimized through an adaptive algorithm, the voltage transient support capability is improved in combination with the SVPWM technology, the wind and light power generation fluctuation is effectively coped, and the stable operation of the power grid is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of renewable energy power generation and voltage coordinated control, and specifically to a voltage control system that coordinates wind, solar and energy storage. Background Art

[0002] As the global energy transition accelerates, the proportion of renewable energy, represented by wind and solar power, continues to increase. However, the intermittent and fluctuating nature of wind and solar power generation poses a significant challenge to the stable operation of the power grid. Current technologies mainly improve voltage stability through the following means:

[0003] Energy storage system optimization control: A bidirectional DC-DC converter is used to achieve fast switching between charging and discharging, but it lacks a multi-time scale coordination mechanism.

[0004] Fuzzy control algorithm: Utilizes fuzzy logic to dynamically allocate hybrid energy storage power, but the rule base design relies on experience and has limited generalization capabilities.

[0005] Space Voltage Vector Modulation (SVPWM): Optimizes grid-connected current harmonics, but does not solve the voltage transient support problem.

[0006] Although the above solution partially alleviates voltage fluctuations, it fails to form a multi-level coordinated control architecture for wind, solar and storage, and is not adaptable enough to extreme working conditions.

[0007] Therefore, the present invention provides a voltage control system that coordinates wind, solar and energy storage. Summary of the Invention

[0008] The purpose of the present invention is to provide a voltage control system for wind, solar and energy storage collaboration to solve the problems raised in the above background technology.

[0009] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a voltage control system for wind, solar and storage coordination, comprising a wind power generation module, a photovoltaic power generation module, a hybrid energy storage system and an intelligent control center. The wind power generation module and the photovoltaic power generation module are connected to the power grid in parallel, and the voltage fluctuations are monitored in real time by the intelligent control center. The charging and discharging strategies of the hybrid energy storage system are dynamically adjusted according to the voltage fluctuations to maintain the stability of the power grid voltage and ensure the power supply quality. The intelligent control center adopts a multi-objective optimization algorithm to accurately predict the wind and photovoltaic power generation power, and optimizes the charging and discharging instructions in combination with the energy storage status to maximize the utilization of wind, solar and storage resources, reduce system losses and improve overall operating efficiency. The hybrid energy storage system is connected to the external power grid and realizes bidirectional energy flow through a bidirectional converter to ensure stable operation of the system under various working conditions.

[0010] Preferably, the wind power generation module specifically includes a wind turbine system, a transmission system, a generator system, a converter system, a wind power generation control system, a support and auxiliary system, and a wind power grid connection and protection system.

[0011] Preferably, the wind turbine system includes blades, which are aerodynamically designed blades that capture wind energy and drive the hub to rotate. They are mostly made of composite materials (such as glass fiber reinforced plastic) and have the characteristics of light weight and high strength; hub: a component connecting the blades and the main shaft, which bears the alternating load transmitted by the blades and needs to have high rigidity and fatigue resistance; main shaft and bearings: the main shaft transmits torque to the gearbox or generator, and the bearings support the main shaft and reduce friction loss; the transmission system includes components such as gearbox, coupling, and brake. The gearbox converts low speed and high torque into high speed and low torque, the coupling connects the various transmission components, and the brake provides an emergency shutdown function to ensure safe and stable operation of the system; the generator system adopts a permanent magnet synchronous generator, which adopts speed-current dual closed-loop control to efficiently convert mechanical energy into electrical energy and reduce energy loss; the converter system converts the AC power output by the generator into DC power that meets the requirements of the power grid to ensure grid stability; the wind power generation The control system includes a sensor network, which includes anemometers, wind vanes, temperature sensors, vibration sensors, etc., which monitor the operating status in real time; the main control system: based on PLC or industrial computers, executes maximum power point tracking (MPPT), yaw control, pitch control and other algorithms; actuators: pitch system: adjusts the blade pitch angle, controls power output and brakes; yaw system: drives the cabin to align with the wind direction to improve wind energy capture efficiency; braking system: includes mechanical brakes and electromagnetic brakes for emergency shutdown; the support and auxiliary system includes a tower, foundation structure, cables and auxiliary facilities. The tower supports the cabin and withstands wind loads, the foundation structure stabilizes the tower, the cable transmits electricity, and the auxiliary facilities ensure operation, which synergistically improves the overall stability and reliability of the system; the wind power grid connection and protection system includes grid-connected inverters, protection relays, filters, etc., to ensure that the power quality meets the grid standards, provide overload protection and fault isolation functions, and ensure safe and stable operation of the system.

[0012] Preferably, the photovoltaic power generation module specifically includes a photovoltaic array system, a power electronic conversion system, a module-level energy storage integration system, a photovoltaic power generation control system, a safety protection auxiliary system and a photovoltaic grid connection and protection system.

[0013] Preferably, the photovoltaic array system includes photovoltaic panels made of monocrystalline silicon or polycrystalline silicon materials, which convert solar energy into direct current. Modern panels use high-efficiency PERC, HJT or TOPCon technology to improve the photoelectric conversion efficiency; the power electronic conversion system includes an inverter, which converts direct current into alternating current to meet the grid access standards; the module-level energy storage integration system stores excess electrical energy, balances the grid load, and improves energy utilization; the photovoltaic power generation control system monitors light intensity and ambient temperature in real time, adjusts the power generation power, and ensures efficient and stable operation of the system; the safety protection auxiliary system includes lightning protection, fire protection, anti-theft and other facilities to ensure equipment safety; the photovoltaic grid-connected and protection system includes a grid-connected inverter, protection relays, etc., to ensure seamless connection between the photovoltaic power generation system and the grid, and provide overload protection and fault isolation functions.

[0014] Preferably, a dynamic reactive power compensation mechanism is set between the wind power generation module and the photovoltaic power generation module. By adjusting reactive power in real time, the system power factor is optimized, the grid stability is improved, and the coordinated control strategy ensures wind-solar complementarity, realizes efficient energy utilization, reduces the wind and solar curtailment rate, and enhances the system's risk resistance. The mechanism uses advanced algorithms and intelligent hardware to monitor grid demand in real time and dynamically adjust compensation parameters. Its operating algorithm formula is:

[0015] P=K1×V^2+K2×I^2+K3×cos(φ),

[0016] Among them, K1, K2, and K3 are compensation coefficients, V is voltage, I is current, and φ is the power factor angle. This formula can accurately calculate the reactive compensation amount to ensure that the system operates at the optimal power factor state, further improve the overall energy efficiency of the system, reduce operating costs, and ensure the continuity and reliability of power supply.

[0017] Preferably, the hybrid energy storage system utilizes supercapacitor + lithium battery hybrid storage technology. The high power density of supercapacitors and the high energy density of lithium batteries are combined to effectively cope with instantaneous high load demands and significantly improve the system response speed and regulation capability. Supercapacitors quickly respond to high-frequency fluctuations, while lithium batteries smooth low-frequency energy demands. An intelligent energy management complementary mechanism is adopted between supercapacitors and lithium batteries to effectively balance instantaneous power and continuous energy supply. This mechanism adopts a fuzzy control algorithm and uses fuzzy logic to dynamically allocate hybrid energy storage power to ensure optimal energy distribution and significantly improve system stability and economy. The operating algorithm formula is:

[0018] Q=α×Pc+(1-α)×Pl,

[0019] Where α is the distribution coefficient, Pc is the supercapacitor power, and Pl is the lithium battery power. By dynamically adjusting the α value, energy distribution can be precisely controlled to achieve efficient energy utilization, reduce system losses, extend equipment life, and improve overall operating efficiency.

[0020] Preferably, the intelligent control center is designed based on a hierarchical control architecture, integrating data acquisition, analysis, decision-making and execution, and monitoring the operating status of each module in real time. The hierarchical control architecture design includes a perception layer, a processing layer and an execution layer. The perception layer is responsible for real-time data acquisition, the processing layer performs data analysis and decision-making, and the execution layer implements control instructions. Among them, the processing layer includes a transient layer, a steady-state layer and an optimization layer. The transient layer adopts model predictive control (MPC) to quickly respond to millisecond-level power fluctuations. The steady-state layer optimizes the medium and long-term voltage distribution through an adaptive PI regulator. The optimization layer is based on a multi-objective optimization algorithm and combines SVPWM technology to achieve optimal voltage vector control, improve the system's dynamic response capability, and dynamically adjust the operating parameters of each module to ensure the optimal overall performance of the system.

[0021] The present invention provides a voltage control system that combines wind, solar, and energy storage. It has the following beneficial effects:

[0022] (1) The present invention constructs a multi-level collaborative control architecture, optimizes energy storage response through adaptive algorithms, and combines SVPWM technology to improve voltage transient support capabilities, effectively responding to fluctuations in wind and solar power generation and ensuring stable operation of the power grid.

[0023] (2) The present invention sets up a dynamic reactive power compensation mechanism and an intelligent energy management complementary mechanism to accurately control the distribution of reactive power and energy storage, significantly improving the system's ability to cope with load fluctuations, reducing system operation risks, enhancing the adaptability of the power grid, and ensuring the continuity and reliability of power supply.

[0024] (3) The present invention realizes efficient information transmission and collaborative optimization between each level by constructing a multi-level collaborative control architecture. Under the multi-objective optimization algorithm, by combining SVPWM technology, the voltage vector is dynamically adjusted and the power output is accurately controlled, thereby further improving the system response speed and stability, ensuring efficient collaboration among modules and optimizing the overall operating performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall module architecture of the present invention;

[0026] Figure 2 This is a view of the hierarchical control architecture of the present invention. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention.

[0029] Example 1:

[0030] A preferred embodiment of a wind-solar-storage coordinated voltage control system provided by the present invention is as follows: Figure 1-2 The figure shows a voltage control system for wind, solar and storage collaboration, including a wind power generation module, a photovoltaic power generation module, a hybrid energy storage system and an intelligent control center. The wind power generation module and the photovoltaic power generation module are connected to the power grid in parallel. The intelligent control center monitors voltage fluctuations in real time and dynamically adjusts the charging and discharging strategy of the hybrid energy storage system according to the voltage fluctuations to maintain grid voltage stability and ensure power supply quality. The intelligent control center uses a multi-objective optimization algorithm to accurately predict wind and photovoltaic power generation power, and optimizes charging and discharging instructions based on the energy storage status to maximize the utilization of wind, solar and storage resources, reduce system losses and improve overall operating efficiency. The hybrid energy storage system is connected to the external power grid and realizes bidirectional energy flow through a bidirectional converter to ensure stable operation of the system under various working conditions.

[0031] The wind power generation module specifically includes a wind turbine system, a transmission system, a generator system, a converter system, a wind power generation control system, a support and auxiliary system, and a wind power grid connection and protection system;

[0032] The wind turbine system includes blades, which are aerodynamically designed blades that capture wind energy and drive the hub to rotate. They are mostly made of composite materials (such as glass fiber reinforced plastic) and are lightweight and high-strength; the hub: a component that connects the blades to the main shaft, which bears the alternating loads transmitted by the blades and must have high rigidity and fatigue resistance; the main shaft and bearings: the main shaft transmits torque to the gearbox or generator, and the bearings support the main shaft and reduce friction loss; the transmission system includes components such as gearboxes, couplings, and brakes. The gearbox converts low-speed and high-torque into high-speed and low-torque, the coupling connects the various transmission components, and the brake provides an emergency shutdown function to ensure safe and stable operation of the system; the generator system uses a permanent magnet synchronous generator with a speed-current dual closed-loop control to efficiently convert mechanical energy into electrical energy and reduce energy loss; the converter system converts the AC power output by the generator into DC power that meets the requirements of the grid to ensure grid stability; wind power generation control system It includes a sensor network, which includes anemometers, wind vanes, temperature sensors, vibration sensors, etc., to monitor the operating status in real time; the main control system: based on PLC or industrial computers, executes maximum power point tracking (MPPT), yaw control, pitch control and other algorithms; actuators: pitch system: adjusts the blade pitch angle, controls power output and brakes; yaw system: drives the nacelle to align with the wind direction to improve wind energy capture efficiency; braking system: includes mechanical brakes and electromagnetic brakes for emergency shutdown; the support and auxiliary system includes tower, foundation structure, cables and auxiliary facilities. The tower supports the nacelle and withstands wind loads. The foundation structure stabilizes the tower. The cable transmits electricity. The auxiliary facilities ensure operation and jointly improve the overall stability and reliability of the system; the wind power grid connection and protection system includes grid-connected inverters, protection relays, filters, etc. to ensure that the power quality meets the grid standards, provide overload protection and fault isolation functions, and ensure safe and stable operation of the system.

[0033] The photovoltaic power generation module specifically includes a photovoltaic array system, a power electronic conversion system, a module-level energy storage integration system, a photovoltaic power generation control system, a safety protection auxiliary system, and a photovoltaic grid connection and protection system;

[0034] The photovoltaic array system includes photovoltaic panels made of monocrystalline or polycrystalline silicon materials, which convert solar energy into direct current. Modern panels use high-efficiency PERC, HJT or TOPCon technology to improve the efficiency of photoelectric conversion. The power electronics conversion system includes an inverter, which converts direct current into alternating current to meet grid access standards. The module-level energy storage integration system stores excess electricity, balances grid load, and improves energy utilization. The photovoltaic power generation control system monitors light intensity and ambient temperature in real time, adjusts power generation, and ensures efficient and stable operation of the system. The safety protection auxiliary system includes lightning protection, fire protection, and anti-theft facilities to ensure equipment safety. The photovoltaic grid connection and protection system includes grid-connected inverters, protection relays, etc., to ensure seamless connection between the photovoltaic power generation system and the grid, and provide overload protection and fault isolation functions.

[0035] Example 2:

[0036] A dynamic reactive power compensation mechanism is set up between the wind power generation module and the photovoltaic power generation module. By adjusting reactive power in real time, the system power factor is optimized, the grid stability is improved, and the coordinated control strategy ensures wind and solar complementarity, realizes efficient energy utilization, reduces the wind and solar curtailment rate, and enhances the system's risk resistance. This mechanism uses advanced algorithms and intelligent hardware to monitor grid demand in real time and dynamically adjust compensation parameters. Its operating algorithm formula is:

[0037] P=K1×V^2+K2×I^2+K3×cos(φ),

[0038] Where K1, K2, and K3 are compensation coefficients, V is voltage, I is current, and φ is the power factor angle. This formula accurately calculates the reactive power compensation amount, ensuring that the system operates at the optimal power factor, further improving the overall system energy efficiency, reducing operating costs, and ensuring the continuity and reliability of power supply.

[0039] By setting up a dynamic reactive power compensation mechanism, the system can not only effectively cope with instantaneous load fluctuations, but also maintain stable output under extreme weather conditions, reduce energy waste, and extend equipment service life. Through the optimization and adjustment of the compensation coefficients K1, K2, and K3, the dynamic reactive power compensation mechanism significantly improves the system's response speed and regulation accuracy, ensuring the efficient and stable operation of the wind-solar complementary power generation system, and further enhancing the reliability and security of the power grid.

[0040] The hybrid energy storage system utilizes supercapacitor + lithium battery mixed storage technology. The high power density of supercapacitors and the high energy density of lithium batteries are combined to effectively cope with instantaneous high load demands and significantly improve the system response speed and regulation capability. Supercapacitors quickly respond to high-frequency fluctuations, while lithium batteries smooth low-frequency energy demands. An intelligent energy management complementary mechanism is adopted between supercapacitors and lithium batteries to effectively balance instantaneous power and continuous energy supply. This mechanism adopts a fuzzy control algorithm and uses fuzzy logic to dynamically allocate hybrid energy storage power to ensure optimal energy distribution and significantly improve system stability and economy. Its operating algorithm formula is:

[0041] Q=α×Pc+(1-α)×Pl,

[0042] Where α is the distribution coefficient, Pc is the supercapacitor power, and Pl is the lithium battery power. By dynamically adjusting the α value, energy distribution can be precisely controlled to achieve efficient energy utilization, reduce system losses, extend equipment life, and improve overall operating efficiency.

[0043] By setting up a hybrid energy storage system and utilizing supercapacitor + lithium battery hybrid storage technology, we can effectively respond to instantaneous high-load demands. Under the intelligent energy management complementary mechanism, we can dynamically adjust the α value to optimize energy distribution, significantly improve system stability and economy, ensure the continuity and reliability of power supply, reduce energy waste, extend equipment service life, and further improve overall operating efficiency.

[0044] The intelligent control center is designed based on a hierarchical control architecture, integrating data acquisition, analysis, decision-making and execution, and monitoring the operating status of each module in real time. The hierarchical control architecture design includes a perception layer, a processing layer and an execution layer. The perception layer is responsible for real-time data acquisition, the processing layer performs data analysis and decision-making, and the execution layer implements control instructions. Among them, the processing layer includes a transient layer, a steady-state layer and an optimization layer. The transient layer uses model predictive control (MPC) to quickly respond to millisecond-level power fluctuations. The steady-state layer optimizes the medium- and long-term voltage distribution through an adaptive PI regulator. The optimization layer is based on a multi-objective optimization algorithm and combines SVPWM technology to achieve optimal voltage vector control, improve the system's dynamic response capability, and dynamically adjust the operating parameters of each module to ensure the optimal overall system performance.

[0045] By building a multi-level collaborative control architecture in the intelligent control center, efficient information transmission and collaborative optimization are achieved between each level. Under the multi-objective optimization algorithm, by combining SVPWM technology, the voltage vector is dynamically adjusted and the power output is precisely controlled, further improving the system response speed and stability, ensuring efficient collaboration among various modules and optimizing overall operating performance.

[0046] When in use, first initialize the system and calibrate the sensors to ensure data accuracy; then start the intelligent control center, activate functional modules at all levels, synchronously collect grid data, analyze and process in real time, and dynamically adjust the compensation strategy to ensure stable operation of the system; at the same time, monitor the energy storage status, intelligently dispatch energy distribution, optimize load balance, and prevent overload risks. Then, through the complementarity of wind power generation and photovoltaic power generation, adjust the power generation power in real time, smooth out output fluctuations, and ensure grid stability. Among them, wind power generation utilizes the changing characteristics of wind speed, while photovoltaic power generation relies on changes in light intensity. The two complement each other to maximize energy complementarity, reduce wind and light abandonment, and improve the utilization rate of renewable energy. Then, through the adjustment of the energy storage system, grid load balancing is achieved, peak pressure is reduced, and energy utilization efficiency is improved. The system adopts a hierarchical control architecture, dynamically coordinates the collaborative work of various modules, optimizes energy flow distribution, and ensures efficient and stable operation of the system.

[0047] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A wind, solar, and energy storage coordinated voltage control system, comprising a wind power generation module, a photovoltaic power generation module, a hybrid energy storage system, and an intelligent control center, characterized by: The wind power generation module and the photovoltaic power generation module are connected to the power grid in parallel, and the voltage fluctuation is monitored in real time by the intelligent control center. The charging and discharging strategy of the hybrid energy storage system is dynamically adjusted according to the voltage fluctuation to maintain the stability of the power grid voltage and ensure the power supply quality. The intelligent control center adopts a multi-objective optimization algorithm to accurately predict the wind and photovoltaic power generation power, and optimizes the charging and discharging instructions in combination with the energy storage status to maximize the utilization of wind, solar and storage resources, reduce system losses and improve overall operating efficiency. The hybrid energy storage system is connected to the external power grid and realizes bidirectional energy flow through a bidirectional converter to ensure stable operation of the system under various working conditions.

2. The wind-solar-storage coordinated voltage control system according to claim 1, characterized in that: The wind power generation module specifically includes a wind turbine system, a transmission system, a generator system, a converter system, a wind power generation control system, a support and auxiliary system, and a wind power grid connection and protection system.

3. The wind-solar-storage coordinated voltage control system according to claim 2, characterized in that: The wind turbine system includes blades, which are aerodynamically designed to capture wind energy and drive the hub to rotate. The blades are mostly made of composite materials (such as glass fiber reinforced plastic) and have the characteristics of light weight and high strength. Hub: The component that connects the blades and the main shaft, which bears the alternating load transmitted by the blades and needs to have high rigidity and fatigue resistance; Main shaft and bearings: The main shaft transmits torque to the gearbox or generator, and the bearings support the main shaft and reduce friction loss; The transmission system includes components such as gearbox, coupling, brake, etc. The gearbox converts low speed and high torque into high speed and low torque, the coupling connects the various transmission components, and the brake provides an emergency shutdown function to ensure safe and stable operation of the system; The generator system adopts a permanent magnet synchronous generator, which adopts speed-current dual closed-loop control to efficiently convert mechanical energy into electrical energy and reduce energy loss; The converter system converts the AC power output by the generator into DC power that meets the requirements of the power grid to ensure grid stability; The wind power generation control system includes a sensor network, which includes anemometers, wind vanes, temperature sensors, vibration sensors, etc. Real-time monitoring of operating status; main control system: based on PLC or industrial computer, executes maximum power point tracking (MPPT), yaw control, pitch control and other algorithms; actuator: pitch system: adjusts the blade pitch angle, controls power output and brakes; yaw system: drives the nacelle to align with the wind direction to improve wind energy capture efficiency; braking system: includes mechanical brakes and electromagnetic brakes for emergency shutdown; the support and auxiliary system includes a tower, foundation structure, cables and auxiliary facilities. The tower supports the nacelle and withstands wind loads. The foundation structure stabilizes the tower. The cable transmits electricity. The auxiliary facilities ensure operation and work together to improve the overall stability and reliability of the system; the wind power grid connection and protection system includes a grid-connected inverter, protection relays, filters, etc. to ensure that the power quality meets the grid standards, provide overload protection and fault isolation functions, and ensure safe and stable operation of the system.

4. The wind-solar-storage coordinated voltage control system according to claim 1, characterized in that: The photovoltaic power generation module specifically includes a photovoltaic array system, a power electronic conversion system, a module-level energy storage integration system, a photovoltaic power generation control system, a safety protection auxiliary system, and a photovoltaic grid connection and protection system.

5. The voltage control system for wind, solar and energy storage synergy according to claim 4, characterized in that: The photovoltaic array system includes photovoltaic panels made of monocrystalline or polycrystalline silicon materials, which convert solar energy into direct current (DC). Modern panels use high-efficiency PERC, HJT, or TOPCon technologies to improve photoelectric conversion efficiency. The power electronics conversion system includes an inverter, which converts DC power into AC power to meet grid access standards. The module-level energy storage integration system stores excess power, balances grid loads, and improves energy utilization. The photovoltaic power generation control system monitors light intensity and ambient temperature in real time, adjusts power generation, and ensures efficient and stable operation of the system. The safety protection auxiliary system includes lightning protection, fire protection, and anti-theft facilities to ensure equipment safety. The photovoltaic grid-connected and protection system includes grid-connected inverters, protection relays, etc., which ensure seamless connection between the photovoltaic power generation system and the power grid and provide overload protection and fault isolation functions.

6. The wind-solar-storage coordinated voltage control system according to claim 1, characterized in that: A dynamic reactive power compensation mechanism is set between the wind power generation module and the photovoltaic power generation module. By adjusting reactive power in real time, the system power factor is optimized, the grid stability is improved, and the coordinated control strategy ensures wind and solar complementarity, realizes efficient energy utilization, reduces the wind and solar curtailment rate, and enhances the system's risk resistance. The mechanism uses advanced algorithms and intelligent hardware to monitor grid demand in real time and dynamically adjust compensation parameters. Its operating algorithm formula is: P=K1×V^2+K2×I^2+K3×cos(φ), Among them, K1, K2, and K3 are compensation coefficients, V is voltage, I is current, and φ is the power factor angle. This formula can accurately calculate the reactive compensation amount to ensure that the system operates at the optimal power factor state, further improve the overall energy efficiency of the system, reduce operating costs, and ensure the continuity and reliability of power supply.

7. The wind-solar-storage coordinated voltage control system according to claim 1, characterized in that: The hybrid energy storage system utilizes supercapacitor + lithium battery hybrid storage technology. The high power density of supercapacitors and the high energy density of lithium batteries are combined to effectively cope with instantaneous high load demands and significantly improve the system response speed and regulation capability. Supercapacitors quickly respond to high-frequency fluctuations, while lithium batteries smooth low-frequency energy demands. An intelligent energy management complementary mechanism is adopted between supercapacitors and lithium batteries to effectively balance instantaneous power and continuous energy supply. This mechanism adopts a fuzzy control algorithm and uses fuzzy logic to dynamically allocate hybrid energy storage power to ensure optimal energy distribution and significantly improve system stability and economy. Its operating algorithm formula is: Q=α×Pc+(1-α)×Pl, Where α is the distribution coefficient, Pc is the supercapacitor power, and Pl is the lithium battery power. By dynamically adjusting the α value, energy distribution can be precisely controlled to achieve efficient energy utilization, reduce system losses, extend equipment life, and improve overall operating efficiency.

8. The wind-solar-storage coordinated voltage control system according to claim 1, characterized in that: The intelligent control center is designed based on a hierarchical control architecture, integrating data acquisition, analysis, decision-making and execution, and monitoring the operating status of each module in real time. The hierarchical control architecture design includes a perception layer, a processing layer and an execution layer. The perception layer is responsible for real-time data acquisition, the processing layer performs data analysis and decision-making, and the execution layer implements control instructions. Among them, the processing layer includes a transient layer, a steady-state layer and an optimization layer. The transient layer adopts model predictive control (MPC) to quickly respond to millisecond-level power fluctuations. The steady-state layer optimizes the medium- and long-term voltage distribution through an adaptive PI regulator. The optimization layer is based on a multi-objective optimization algorithm and combines SVPWM technology to achieve optimal voltage vector control, improve the system's dynamic response capability, and dynamically adjust the operating parameters of each module to ensure the optimal overall performance of the system.

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