Photovoltaic power generation electric energy regulation and control method, equipment, system and medium

Abstract

The invention discloses a photovoltaic power generation electric energy regulation and control method, device and system and a medium, and relates to the technical field of photovoltaic application, a control station monitors the power generation amount of a photovoltaic power generation field and the power consumption of an electric energy storage area in real time, obtains a real-time difference value between the power generation amount and the power consumption, judges whether the real-time difference value is greater than 0, and determines whether the real-time difference value is greater than 0 according to the size of the real-time difference value. Switching the operation mode of the photovoltaic power generation field and regulating and controlling the power generation electric energy of the photovoltaic power generation field, judging whether the real-time difference value between the power generation amount and the power consumption is greater than 0 or not, executing an off-grid operation strategy when the real-time difference value is 0 or a negative value, and executing a grid-connected operation strategy when the real-time difference value is a positive value. The power generation capacity of the photovoltaic power generation field can be regulated and controlled in real time, the purpose of effectively storing and using the electric energy generated by the photovoltaic power generation field is achieved, and the defects that in the continuous working process of the photovoltaic power generation field, the electric energy yield is large, and the electric energy cannot be effectively stored and used possibly can be overcome.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic application technology, and in particular to a photovoltaic power generation electric energy control method, equipment, system and medium. Background Art

[0002] The unique environmental conditions in plateau regions place higher demands on construction equipment. Currently, the equipment used for infrastructure construction in plateau areas is primarily green construction equipment powered by electricity. This equipment requires charging during construction operations to ensure continuous operation.

[0003] However, due to the limited coverage of high-voltage power grids in plateau areas, there are hidden dangers of construction difficulties during construction. Therefore, to solve this problem, existing technologies usually install photovoltaic power plants in areas close to the construction site, and use the electricity generated by the photovoltaic power plants to supplement the electricity. Although the electricity generated by photovoltaic power plants can solve problems such as insufficient power supply caused by the difficulty of high-voltage power grid construction, since photovoltaic power plants will continue to operate after construction is completed, the electricity generated may have a large output, which brings new risks to the storage and use of electricity. Summary of the Invention

[0004] The main purpose of the present invention is to propose a photovoltaic power generation electric energy control method, equipment, system and medium, aiming to solve the technical problem in the prior art that after the construction of the photovoltaic power field is completed, the photovoltaic power field will continue to work, which may result in a large amount of electric energy generated, bringing new hidden dangers to the storage and use of electric energy.

[0005] To achieve the above objectives, in a first aspect, the present invention proposes a photovoltaic power generation electric energy control method, which is applied to a photovoltaic power generation system, wherein the photovoltaic power generation system includes a photovoltaic power generation field, an electric energy storage area, a control station, and a high-voltage substation. The photovoltaic power generation field is electrically connected to the control station via a line network, and the control station is respectively connected to the electric energy storage area and the high-voltage substation via a line network. The plateau substation is electrically connected to an external power grid, and the electric energy storage area is used to supply power to multiple electrical devices.

[0006] The photovoltaic power generation system protection method comprises the following steps:

[0007] The control station monitors the power generation of the photovoltaic power plant and the power consumption of the energy storage area in real time to obtain a real-time difference between the power generation and the power consumption;

[0008] Determine whether the real-time difference is greater than 0;

[0009] According to the size of the real-time difference, the operation mode of the photovoltaic power field is switched and the power generated by the photovoltaic power field is regulated; when the real-time difference is 0 or a negative value, the off-grid operation strategy is executed; when the real-time difference is a positive value, the grid-connected operation strategy is executed.

[0010] In one embodiment, the step of switching the operation mode of the photovoltaic power plant and regulating the power generated by the photovoltaic power plant according to the size of the real-time difference includes:

[0011] When the real-time difference is 0 or a negative value, the operation mode of the photovoltaic power plant is switched to the off-grid operation strategy;

[0012] Real-time collection of the real-time state of charge value of the electric energy storage area;

[0013] Determining whether the real-time state of charge value is less than 90%;

[0014] When the real-time state of charge value is less than 90% and the power generation power of the photovoltaic power plant is greater than the total load power of all the electrical equipment in the energy storage area, the excess generated electric energy is stored in the energy storage area to implement the charging strategy.

[0015] In one embodiment, after the step of determining whether the real-time state of charge value is less than 90%, the method further includes:

[0016] When the real-time state of charge value is greater than or equal to 90% and the power generation power of the photovoltaic power plant is greater than the total load power of all the electrical equipment in the energy storage area, the charging of the energy storage area is stopped and the power generated by the photovoltaic power plant is directly supplied to the electrical equipment to implement the floating charge strategy.

[0017] In one embodiment, after the step of determining whether the real-time state of charge value is less than 90%, the method further includes:

[0018] When the real-time state of charge value is greater than or equal to 90% and the power generation power of the photovoltaic power plant is less than the total load power of all the electrical equipment in the energy storage area, electric energy is output from the energy storage area to implement the power generation strategy when the photovoltaic power plant operates at the maximum power generation power.

[0019] In one embodiment, after the step of storing excess generated electric energy in the electric energy storage area to execute the charging strategy when the real-time state of charge value is less than 90% and the generated power of the photovoltaic power plant is greater than the total load power of all the electric devices in the electric energy storage area, the method further includes:

[0020] When the real-time state of charge value is less than 20%, the shutdown strategy is executed.

[0021] In one embodiment, the step of switching the operation mode of the photovoltaic power plant and regulating the power generated by the photovoltaic power plant according to the size of the real-time difference further includes:

[0022] When the real-time difference is a positive value, the operation mode of the photovoltaic power plant is switched to the grid-connected operation strategy;

[0023] When the power generated by the photovoltaic power plant is greater than the total load power of all the electrical devices, the excess electric energy is boosted by the high-voltage substation and then transmitted to the external power grid.

[0024] In one embodiment, when the power generated by the photovoltaic power plant is greater than the total load power of all the power-consuming devices, the step of boosting the excess power through the high-voltage substation and transmitting it to the external power grid includes:

[0025] When the power generation power of the photovoltaic power plant is greater than the total load power of all the electrical equipment, the current load state value of the electric energy storage area is collected;

[0026] When the current load state value is less than 90%, a charging strategy is executed for the electric energy storage area;

[0027] When the current load state value is greater than or equal to 90%, the excess electric energy is boosted by the high-voltage substation and then transmitted to the external power grid.

[0028] Based on the same technical concept, in the second aspect, the present invention also proposes a photovoltaic power generation electric energy regulation and control device, which includes a processor and a memory, and the memory stores a photovoltaic power generation electric energy regulation program. When the photovoltaic power generation electric energy regulation program is executed by the processor, the photovoltaic power generation electric energy regulation method described in the first aspect is implemented.

[0029] Based on the same technical concept, in the third aspect, the present invention also proposes a photovoltaic power generation system, including a photovoltaic power field, an electric energy storage device, a control station, a high-voltage substation and the photovoltaic power generation and electric energy regulation and control device described in the second aspect. The photovoltaic power field is electrically connected to the control station through a line network, and the control station is respectively connected to the electric energy storage device and the high-voltage substation through a line network. The plateau substation is electrically conductive with the external power grid. The electric energy storage device is used to supply power to multiple electrical devices. The photovoltaic power generation and electric energy regulation and control device are all communicatively connected to the photovoltaic power field, the electric energy storage device, the control station and the high-voltage substation.

[0030] Based on the same technical concept, in the fourth aspect, the present invention also proposes a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by one or more processors, the photovoltaic power generation and electric energy regulation method described in the first aspect is implemented.

[0031] The technical solution of the present invention monitors the power generation of the photovoltaic power field and the power consumption of the electric energy storage area in real time through the control station, obtains the real-time difference between the power generation and the power consumption, judges whether the real-time difference is greater than 0, and switches the operation mode of the photovoltaic power field and regulates the power generation of the photovoltaic power field according to the size of the real-time difference. When in use, the present invention determines whether the real-time difference between the power generation and the power consumption is greater than 0, and executes an off-grid operation strategy when the real-time difference is 0 or a negative value, and executes a grid-connected operation strategy when the real-time difference is a positive value. The present invention can instantly regulate the power generation of the photovoltaic power field, achieve the purpose of effectively storing and using the electric energy generated by the photovoltaic power field, and avoid the defect that the photovoltaic power field may have a large power output and cannot be effectively stored and used during continuous operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0033] Figure 1 A schematic structural diagram of an embodiment of a photovoltaic power generation electric energy control method provided by the present invention;

[0034] Figure 2 for Figure 1 Flowchart of step S300 in the example;

[0035] Figure 3 for Figure 1 Flowcharts of some specific embodiments of step S300 exemplified in FIG.

[0036] Figure 4 for Figure 3 Flowchart of step S390 in the example;

[0037] Figure 5 This is a structural diagram of the photovoltaic power generation electric energy regulation and control device provided by the present invention.

[0038] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0039] 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 any creative efforts shall fall within the scope of protection of the present invention.

[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] The present invention provides a photovoltaic power generation electric energy control method, equipment, system and medium.

[0043] See also Figures 1 to 5 For ease of understanding, the execution entity of this embodiment is the control station of the photovoltaic power generation system. More specifically, this photovoltaic power generation electric energy control method is applied to a photovoltaic power generation system, which includes a photovoltaic power generation field, an electric energy storage area, a control station, and a high-voltage substation. The photovoltaic power generation field is electrically connected to the control station via a power network. The control station is respectively connected to the electric energy storage area and the high-voltage substation via a power network. The plateau substation is electrically connected to an external power grid. The electric energy storage area is used to power multiple electrical devices.

[0044] The photovoltaic power generation system protection method comprises the following steps:

[0045] S100. Monitor the power generation of the photovoltaic power plant and the power consumption of the electric energy storage area in real time through the control station, and obtain a real-time difference between the power generation and the power consumption.

[0046] Specifically, the control station is connected to the photovoltaic power plant and the energy storage area via multiple charge sensors, obtaining real-time data on the photovoltaic power plant's power output and the energy storage area's power consumption. The real-time difference between power generation and power consumption indicates whether the current photovoltaic power generation meets power demand. In some embodiments, the control station can also obtain detailed power consumption information for multiple power-consuming devices from the energy storage area to more accurately calculate the difference.

[0047] S200: Determine whether the real-time difference is greater than 0.

[0048] After calculating the real-time difference, the control station can perform a logical analysis to determine whether the difference is greater than zero. If the real-time difference is greater than zero, it means that the PV farm's power generation exceeds the energy storage area's demand. If the difference is zero or less than zero, it means that the power generation is insufficient or just barely meeting demand.

[0049] S300. Switch the operation mode of the photovoltaic power plant and regulate the power generated by the photovoltaic power plant according to the size of the real-time difference; when the real-time difference is 0 or a negative value, execute an off-grid operation strategy; when the real-time difference is a positive value, execute a grid-connected operation strategy.

[0050] Specifically, the control station switches the PV farm's operating mode based on the determination in step S200. When the real-time difference is zero or negative, the system implements an off-grid operation strategy, where the PV farm directly supplies power to the energy storage area. When the real-time difference is positive, the system implements a grid-connected operation strategy, transferring excess power to the external grid via the high-voltage substation.

[0051] For example, a photovoltaic power plant located in a high-altitude area with abundant sunshine typically reaches peak power generation at noon. Assume that during a certain operating period, the control station detects that the power generation of the photovoltaic power plant is 2,000 kWh, while the power consumption of the energy storage area is 1,500 kWh. The real-time difference is 500 kWh. Through steps S100 to S300, the control station determines that the difference is positive and switches to grid-connected operation mode, transmitting the excess 500 kWh of electricity to the high-voltage substation. After the high-voltage substation completes the boosting operation, it is then fed into the external power grid.

[0052] To better understand the present invention, it can be further explained that the overall concept of the present invention is as follows: First, a photovoltaic power plant, an energy storage area (the energy storage area is a battery storage station), a control station, and a high-voltage substation are set up. The photovoltaic power plant is first electrically connected to the control station via a power network, and the control station is connected to the high-voltage substation and the energy storage area via the established power network. On this basis, the power generation of the photovoltaic power plant is first monitored in real time, and the power consumption of the power consumption area is also monitored in real time. The control station determines the control method for the power generated by the photovoltaic power plant based on the current difference between the power generation result and the power consumption. When the current difference is 0 or negative, the control station is always on and connects the power generated by the photovoltaic power plant to the power consumption area (i.e., implements an off-grid operation strategy between the photovoltaic power plant and the power consumption area); when the current difference is positive, the control station controls the power generation of the photovoltaic power plant to connect to the power consumption area and the high-voltage substation, and then inputs the power generated by the photovoltaic power plant into the power grid after being boosted by the high-voltage substation (i.e., implements a grid-connected operation strategy between the photovoltaic power plant, the power consumption area, and the power grid).

[0053] When implementing the off-grid operation strategy, it is necessary to judge the energy storage status of the energy storage device in the power consumption area. When the SOC (battery state of charge, i.e., the real-time state of charge and current state of charge mentioned below) of the energy storage device satisfies SOC<90% and the power generation efficiency of the photovoltaic power generation equipment satisfies that the power generation power is greater than the load power of the power consumption equipment, the power consumption and charging parallel control strategy of the power consumption equipment is executed (i.e., the energy storage device executes the charging strategy). When SOC≥90% and the power generation efficiency of the photovoltaic power generation equipment satisfies that the power generation power is greater than the load power of the power consumption equipment, the control strategy of the power consumption equipment directly consuming electric energy is executed (i.e., the energy storage device executes the floating charge strategy). When 90%≤SOC≤100% and the power generation efficiency of the photovoltaic power generation equipment satisfies that the power generation power is less than the load power of the power consumption equipment, the control strategy of the photovoltaic power field operating at maximum power generation power is executed (i.e., the energy storage device executes the discharge strategy). When SOC<90% and the power generation efficiency of the photovoltaic power generation equipment satisfies that the power generation power is less than the load power of the power consumption equipment, the off-grid operation strategy is switched to grid-connected operation, and the power consumption area is supplied with power through the power grid. When SOC≤20%, the photovoltaic shutdown and no power generation control strategy is implemented.

[0054] When implementing the grid-connected operation strategy, when 90% ≤ SOC ≤ 100%, the control strategy of boosting excess power and transmitting it to the grid is implemented. When SOC is less than 90%, the power consumption and charging of the power equipment are controlled in parallel (i.e., the energy storage equipment implements the charging strategy).

[0055] In this embodiment, the control station monitors the power generation of the photovoltaic power field and the power consumption of the electric energy storage area in real time, obtains the real-time difference between the power generation and the power consumption, determines whether the real-time difference is greater than 0, and switches the operation mode of the photovoltaic power field and regulates the power generation of the photovoltaic power field according to the size of the real-time difference. When the present invention is in use, it determines whether the real-time difference between the power generation and the power consumption is greater than 0, and executes an off-grid operation strategy when the real-time difference is 0 or a negative value, and executes a grid-connected operation strategy when the real-time difference is a positive value. This enables the present invention to instantly regulate the power generation of the photovoltaic power field, achieves the purpose of effectively storing and using the electric energy generated by the photovoltaic power field, and can avoid the defect that the photovoltaic power field may have a large power output and cannot be effectively stored and used during continuous operation.

[0056] In one embodiment, step S300 includes:

[0057] S310: When the real-time difference is 0 or a negative value, the operation mode of the photovoltaic power plant is switched to the off-grid operation strategy.

[0058] In this step, when the control station monitors and determines that the real-time difference is zero or negative, the photovoltaic power plant switches to off-grid operation mode, thereby enabling the photovoltaic power plant to supply power to electrical equipment in the energy storage area through local power lines, ensuring stable operation of the system.

[0059] S320: Collect the real-time state of charge value of the electric energy storage area in real time.

[0060] In this step, the control station is configured to monitor the state of charge (SOC) within the energy storage area in real time, specifically the current charge level (expressed as a percentage) of the battery pack. Using multiple pre-installed charge sensors, the control station obtains real-time information about the charge of the batteries within the energy storage area, facilitating subsequent decision-making and strategy adjustments.

[0061] S330: Determine whether the real-time state of charge value is less than 90%.

[0062] In the step, the control station determines the real-time state of charge value to determine whether the current charge level is less than 90%. When the state of charge is less than 90%, it means that the battery still has room for charging and can be charged according to the subsequent power supply situation.

[0063] S340. When the real-time state of charge value is less than 90% and the power generation power of the photovoltaic power plant is greater than the total load power of all the electrical devices in the energy storage area, the excess generated electric energy is stored in the energy storage area to execute the charging strategy.

[0064] Specifically, if the state of charge is determined to be lower than 90%, and the instantaneous power generation of the photovoltaic power plant exceeds the total power load of all electrical equipment in the energy storage area, the control station will store the excess electricity in the batteries in the energy storage area, thereby performing charging operations, ultimately ensuring the rational distribution and storage of electricity.

[0065] This embodiment acquires and analyzes the operating status of the system in real time and reasonably allocates the generated electricity, effectively solving the energy storage management problem caused by the large output of electricity in photovoltaic power generation, improving the utilization efficiency of electricity and promoting the widespread application of renewable energy.

[0066] In one embodiment, after step S330, the method further includes:

[0067] S350. When the real-time state of charge value is greater than or equal to 90% and the power generation power of the photovoltaic power plant is greater than the total load power of all the electrical equipment in the energy storage area, the charging of the energy storage area is stopped and the power generation energy of the photovoltaic power plant is directly supplied to the electrical equipment to implement the floating charge strategy.

[0068] Specifically, in this embodiment, step S350 is performed after determining that the real-time state of charge (SOC) value reaches or exceeds 90%. When the control station detects that the SOC of the energy storage area is high and the current generated power still exceeds the total load power of all power-consuming devices, further battery charging will be stopped. Excess power will be directly supplied to the power-consuming devices to maintain normal operation. This process is known as a floating charge strategy. In this floating charge strategy, the power output of the photovoltaic power plant is prioritized to meet immediate power needs, preventing overcharging and battery loss in the energy storage area.

[0069] The photovoltaic power generation system can rationally manage power distribution at different states of charge based on the state of the energy storage area and the immediate power output. This not only effectively prevents battery overcharging, but also ensures the stability and safety of the entire system, improving the application efficiency of photovoltaic power generation in renewable energy systems.

[0070] In one embodiment, after step S330, the method further includes:

[0071] S360. When the real-time state of charge value is greater than or equal to 90% and the power generation power of the photovoltaic power plant is less than the total load power of all the electrical equipment in the electric energy storage area, electric energy is output from the electric energy storage area to execute the power generation strategy when the photovoltaic power plant operates at the maximum power generation power.

[0072] Specifically, in this embodiment, when the control station detects that the state of charge of the energy storage area has reached or exceeded 90%, and the current photovoltaic power generation capacity is less than the total demand of the power-consuming equipment, the system will output power from the energy storage area to supplement the power generation shortfall. This ensures that the system can maintain load stability even when power demand exceeds power generation capacity, thus avoiding equipment shutdowns due to power shortages.

[0073] In one embodiment, after step S340, the method further includes:

[0074] S370: When the real-time state of charge value is less than 20%, a shutdown strategy is executed.

[0075] Specifically, in this embodiment, when the control station detects that the real-time state of charge of the electric energy storage area is lower than 20%, the system will immediately enter the shutdown mode to execute the shutdown strategy. The execution of the shutdown strategy may include stopping the operation of the photovoltaic power plant and disconnecting it from the power grid to avoid the energy storage area continuing to operate at an extremely low state of charge, which may cause the energy storage batteries in the battery storage area to be over-discharged or the system to fail. Step S370 not only protects the core energy storage equipment of the system, ensures the long-term reliability of the battery, but also avoids sudden power outages caused by insufficient energy storage power. Of course, even when executing the grid-connected operation strategy, the shutdown strategy will be executed when the real-time state of charge value is less than 20%.

[0076] In one embodiment, step S300 further includes:

[0077] S380: When the real-time difference is a positive value, the operation mode of the photovoltaic power plant is switched to the grid-connected operation strategy.

[0078] Specifically, in this embodiment, when the control station monitors a positive real-time difference, indicating that the PV farm's generated power is sufficient to meet current electricity demand and has a surplus, the control station automatically switches to grid-connected operation. Grid-connected operation involves the PV farm meeting the power needs of local consumers and then connecting any excess power to the external grid to distribute the excess generated power.

[0079] S390: When the power generated by the photovoltaic power plant is greater than the total load power of all the electrical devices, the excess electric energy is boosted by the high-voltage substation and then transmitted to the external power grid.

[0080] In grid-connected operation, the control station monitors the relationship between the PV farm's generated power and the total load power of the power consumers. When the PV farm's generated power exceeds the needs of all power consumers, the control station boosts the excess power through a high-voltage substation, ensuring that the power transmission meets the output standards of the external power grid. The power is then transmitted to the external grid for further use. This ensures efficient power conversion and transmission, avoids energy waste, and maintains load stability on the external power grid.

[0081] In one embodiment, step S390 includes:

[0082] S391. When the power generation power of the photovoltaic power plant is greater than the total load power of all the electrical equipment, the current load status value of the electric energy storage area is collected.

[0083] In this embodiment, when the PV farm's generated power exceeds the demand of local power users, the control station immediately collects the current load status of the energy storage area to accurately reflect the energy storage device's power status. The current load status value indicates the percentage of energy storage area power, which determines the subsequent power distribution strategy.

[0084] S392: When the current load state value is less than 90%, a charging strategy is executed for the electric energy storage area.

[0085] Specifically, if the current load state value is below 90%, the system prioritizes replenishing the energy storage area. This charging strategy aims to utilize excess power to charge the energy storage area, ensuring sufficient backup power is available during peak demand. Executing step S392 helps maintain the optimal charge level of the energy storage device, thereby enhancing the stability of the overall power system.

[0086] S393: When the current load state value is greater than or equal to 90%, the excess electric energy is boosted by the high-voltage substation and then transmitted to the external power grid.

[0087] When the energy storage area is fully loaded or near full, excess energy is no longer stored in the energy storage equipment. Instead, it is converted and boosted to a voltage suitable for connection to the external grid through a high-voltage substation. This boosted energy is then transmitted to the external grid, supporting power supply over a wider area and avoiding energy waste.

[0088] Based on the same technical concept, in the second aspect, the present invention also proposes a photovoltaic power generation electric energy regulation and control device, which includes a processor and a memory, and the memory stores a photovoltaic power generation electric energy regulation program. When the photovoltaic power generation electric energy regulation program is executed by the processor, the photovoltaic power generation electric energy regulation method described in the first aspect is implemented.

[0089] The photovoltaic power generation electric energy regulation and control equipment in the embodiments of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted control terminals), etc., as well as fixed terminals such as digital TVs, desktop computers, etc.

[0090] The photovoltaic power generation electric energy regulation and control device may include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. Various programs and data required for the operation of the photovoltaic power generation electric energy regulation and control device are also stored in RAM 1004. The processing device 1001, ROM 1002, and RAM 1004 are connected to each other via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, hard disk, etc.; and communication devices 1009. The communication device 1009 can allow the photovoltaic power generation electric energy regulation and control device to communicate wirelessly or wired with other devices to exchange data. Although the figure shows a photovoltaic power generation electric energy regulation and control device with various systems, it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems can be implemented or have instead.

[0091] In particular, according to the embodiments disclosed in the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program comprising program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0092] The photovoltaic power generation and electric energy regulation and control device provided in this application adopts the photovoltaic power generation and electric energy regulation method of the above-mentioned embodiment, which can solve the technical problem that the photovoltaic power generation field will continue to operate after construction is completed, which may result in a large amount of electric energy generated, thereby bringing new hidden dangers to the storage and use of electric energy. Compared with the existing technology, the beneficial effects of the photovoltaic power generation and electric energy regulation and control device provided in this application are the same as the beneficial effects of the photovoltaic power generation and electric energy regulation method provided in the above-mentioned embodiment, and the other technical features of the photovoltaic power generation and electric energy regulation and control device are the same as the features disclosed in the method of the previous embodiment, and are not further described here.

[0093] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0094] Based on the same technical concept, in the third aspect, the present invention also proposes a photovoltaic power generation system, including a photovoltaic power field, an electric energy storage device, a control station, a high-voltage substation and the photovoltaic power generation and electric energy regulation and control device described in the second aspect. The photovoltaic power field is electrically connected to the control station through a line network, and the control station is respectively connected to the electric energy storage device and the high-voltage substation through a line network. The plateau substation is electrically conductive with the external power grid. The electric energy storage device is used to supply power to multiple electrical devices. The photovoltaic power generation and electric energy regulation and control device are all communicatively connected to the photovoltaic power field, the electric energy storage device, the control station and the high-voltage substation.

[0095] In addition, the photovoltaic power generation and energy control system provided in the embodiment of the present application can solve the technical problem that, since the photovoltaic power plant will continue to work after the construction is completed, the electric energy generated by the power generation may have a large output, which brings new hidden dangers to the storage and use of electric energy. Compared with the existing technology, the beneficial effects of the photovoltaic power generation and energy control system provided in the embodiment of the present application are the same as the beneficial effects of the photovoltaic power generation and energy control method provided in the above embodiment, and the other technical features of the photovoltaic power generation and energy control system are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0096] Based on the same technical concept, in the fourth aspect, the present invention also proposes a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by one or more processors, the photovoltaic power generation and electric energy regulation method described in the first aspect is implemented.

[0097] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0098] The computer-readable storage medium may be included in the photovoltaic power generation electric energy regulation and control device; or it may exist independently without being assembled into the photovoltaic power generation electric energy regulation and control device.

[0099] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the photovoltaic power generation power regulation and control device, the photovoltaic power generation power regulation and control device can implement the photovoltaic power generation power regulation method described above.

[0100] Computer program code for performing the operations of the present application may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on the remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0101] The flow charts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order than that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0102] The modules described in the embodiments of the present application may be implemented in software or hardware, wherein the name of a module does not necessarily limit the unit itself.

[0103] The readable storage medium provided in this application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., a computer program) for executing the above-mentioned photovoltaic power generation and energy regulation method. This can solve the technical problem that after the construction of the photovoltaic power plant is completed, the photovoltaic power plant will continue to operate, which may result in a large amount of electricity generated, which may bring new hidden dangers to the storage and use of electricity. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as the beneficial effects of the photovoltaic power generation and energy regulation method provided in the above-mentioned embodiment, and will not be repeated here.

[0104] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A photovoltaic power generation energy control method, characterized in that: Applied to a photovoltaic power generation system, the photovoltaic power generation system includes a photovoltaic power plant, an energy storage area, a control station and a high-voltage substation. The photovoltaic power plant is electrically connected to the control station via a wire network. The control station is respectively connected to the energy storage area and the high-voltage substation via a wire network. The plateau substation is electrically connected to an external power grid. The energy storage area is used to supply power to multiple electrical devices. The photovoltaic power generation system protection method comprises the following steps: The control station monitors the power generation of the photovoltaic power plant and the power consumption of the energy storage area in real time to obtain a real-time difference between the power generation and the power consumption; Determine whether the real-time difference is greater than 0; According to the size of the real-time difference, the operation mode of the photovoltaic power field is switched and the power generated by the photovoltaic power field is regulated; when the real-time difference is 0 or a negative value, the off-grid operation strategy is executed; when the real-time difference is a positive value, the grid-connected operation strategy is executed.

2. The photovoltaic power generation electric energy control method according to claim 1, characterized in that: The step of switching the operation mode of the photovoltaic power plant and regulating the power generation of the photovoltaic power plant according to the size of the real-time difference includes: When the real-time difference is 0 or a negative value, the operation mode of the photovoltaic power plant is switched to the off-grid operation strategy; Real-time collection of the real-time state of charge value of the electric energy storage area; Determining whether the real-time state of charge value is less than 90%; When the real-time state of charge value is less than 90% and the power generation power of the photovoltaic power plant is greater than the total load power of all the electrical equipment in the energy storage area, the excess generated electric energy is stored in the energy storage area to implement the charging strategy.

3. The photovoltaic power generation energy control method according to claim 2, characterized in that: After the step of determining whether the real-time state of charge value is less than 90%, the method further includes: When the real-time state of charge value is greater than or equal to 90% and the power generation power of the photovoltaic power plant is greater than the total load power of all the electrical equipment in the energy storage area, the charging of the energy storage area is stopped and the power generated by the photovoltaic power plant is directly supplied to the electrical equipment to implement the floating charge strategy.

4. The photovoltaic power generation electric energy control method according to claim 2, characterized in that: After the step of determining whether the real-time state of charge value is less than 90%, the method further includes: When the real-time state of charge value is greater than or equal to 90% and the power generation power of the photovoltaic power plant is less than the total load power of all the electrical equipment in the energy storage area, electric energy is output from the energy storage area to implement the power generation strategy when the photovoltaic power plant operates at the maximum power generation power.

5. The photovoltaic power generation energy control method according to claim 2, characterized in that: After the step of storing excess generated electric energy in the electric energy storage area to execute the charging strategy when the real-time state of charge value is less than 90% and the generated power of the photovoltaic power plant is greater than the total load power of all the electric devices in the electric energy storage area, the method further includes: When the real-time state of charge value is less than 20%, the shutdown strategy is executed.

6. The photovoltaic power generation electric energy control method according to any one of claims 1 to 5, characterized in that: The step of switching the operation mode of the photovoltaic power plant and regulating the power generated by the photovoltaic power plant according to the size of the real-time difference further includes: When the real-time difference is a positive value, the operation mode of the photovoltaic power plant is switched to the grid-connected operation strategy; When the power generated by the photovoltaic power plant is greater than the total load power of all the electrical devices, the excess electric energy is boosted by the high-voltage substation and then transmitted to the external power grid.

7. The photovoltaic power generation electric energy control method according to claim 6, characterized in that: When the power generated by the photovoltaic power plant is greater than the total load power of all the power-consuming devices, the step of boosting the excess electric energy through the high-voltage substation and transmitting it to the external power grid includes: When the power generation power of the photovoltaic power plant is greater than the total load power of all the electrical equipment, the current load state value of the electric energy storage area is collected; When the current load state value is less than 90%, a charging strategy is executed for the electric energy storage area; When the current load state value is greater than or equal to 90%, the excess electric energy is boosted by the high-voltage substation and then transmitted to the external power grid.

8. A photovoltaic power generation power regulation and control device, characterized in that: The photovoltaic power generation electric energy regulation and control device includes a processor and a memory, and the memory stores a photovoltaic power generation electric energy regulation program. When the photovoltaic power generation electric energy regulation program is executed by the processor, the photovoltaic power generation electric energy regulation method according to any one of claims 1 to 7 is implemented.

9. A photovoltaic power generation system, characterized in that: It includes a photovoltaic power plant, an electric energy storage device, a control station, a high-voltage substation and the photovoltaic power generation and electric energy regulation and control device as described in claim 8. The photovoltaic power plant is electrically connected to the control station through a wire network, and the control station is respectively connected to the electric energy storage device and the high-voltage substation through a wire network. The plateau substation is electrically connected to the external power grid. The electric energy storage device is used to supply power to multiple electrical devices. The photovoltaic power generation and electric energy regulation and control device is communicatively connected to the photovoltaic power plant, the electric energy storage device, the control station and the high-voltage substation.

10. A computer-readable storage medium, characterized in that The storage medium stores a computer program, and when the computer program is executed by one or more processors, the photovoltaic power generation electric energy control method according to any one of claims 1 to 7 is implemented.

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