Distributed photovoltaic power station control method and device, storage medium and program product
By allocating power target values to each subsystem of the distributed photovoltaic power station and allocating power generation capacity to the inverter, the problem of control equipment redundancy in the distributed photovoltaic power station is solved, thereby reducing the number of devices and lowering costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-04
- Publication Date
- 2026-03-27
AI Technical Summary
In distributed photovoltaic power stations, the independent configuration of control equipment for each outgoing line results in redundancy, which increases construction costs and maintenance difficulties. This redundancy in equipment and control equipment configuration also increases construction costs.
A distributed photovoltaic power station control method is adopted, in which the power control value of the grid dispatch terminal is allocated to each subsystem, and for each inverter, it is allocated to each transformer and inverter. Each transformer and inverter, and each control device, directly performs unified power allocation according to the power control value of the grid dispatch terminal. Each subsystem has at least one transformer and inverter. After determining the power target value of each subsystem, the corresponding power generation of each inverter in the subsystem can be allocated according to the power target value of each subsystem. In this way, all inverters can be controlled to operate according to their corresponding power generation to complete the control of the distributed photovoltaic power station.
It enables coordinated and flexible management of multiple subsystems, reduces the number of control devices, and lowers the hardware cost and subsequent operation and maintenance cost of distributed photovoltaic power station control.
Smart Images
Figure CN121749366A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power control technology for distributed photovoltaic power plants, and in particular to a control method, equipment, storage medium and program product for distributed photovoltaic power plants. Background Technology
[0002] In related technologies, distributed photovoltaic (PV) power stations typically have multiple independent outgoing lines, each with its own independent Automatic Generation Control (AGC) system; that is, each outgoing line is controlled by its own dedicated control equipment. The grid dispatch center issues power control values for each outgoing line, and the control equipment for each outgoing line controls the inverters associated with that line based on the current real-time operating conditions and the corresponding power control values, thereby achieving control of the entire distributed PV power station.
[0003] However, configuring separate control equipment for each outgoing line would lead to redundancy in the configuration of control equipment, increasing the overall construction cost of the distributed photovoltaic power station control system. Summary of the Invention
[0004] The main purpose of this application is to provide a control method, equipment, storage medium and program product for distributed photovoltaic power stations, which aims to solve the technical problems of configuration redundancy and high cost of independently configured control equipment for each outgoing line of a distributed photovoltaic power station in related technologies.
[0005] To achieve the above objectives, this application proposes a control method for a distributed photovoltaic power station, which can be used to control equipment. The control method for a distributed photovoltaic power station includes: Obtain the power control values issued by the power grid dispatching terminal; Based on the power control value, the corresponding power target value is allocated to each subsystem of the distributed photovoltaic power station; wherein, each subsystem includes at least one outgoing line of the distributed photovoltaic power station, and each outgoing line is equipped with a transformer and an inverter. For each subsystem, the corresponding power generation capacity is allocated to each inverter in the subsystem according to the power target value; Control all inverters to operate at their respective power outputs to complete the control of the distributed photovoltaic power station.
[0006] In one embodiment, before the step of allocating corresponding power target values to each subsystem of the distributed photovoltaic power station according to the power control value, the method further includes: For each outgoing line, determine whether there is an outgoing line in the distributed photovoltaic power station that is directly or indirectly connected to the outgoing line; In the case of outgoing lines that are directly or indirectly connected to the outgoing lines, the outgoing lines and the outgoing lines that are directly or indirectly connected to the outgoing lines are divided into a subsystem; In the absence of outgoing lines that are directly or indirectly connected to the outgoing lines, the outgoing lines are classified as a separate subsystem.
[0007] In one embodiment, the power control value includes the total power control value of the distributed photovoltaic power station; The steps for allocating corresponding power target values to each subsystem of a distributed photovoltaic power station based on the power control values include: Based on the total power control value, the total operating capacity of each subsystem, the total transformer loss of each subsystem, and the total line loss of each subsystem, determine the corresponding power target value for each subsystem.
[0008] In one embodiment, the step of determining the power target value for each subsystem based on the total power control value, the total operating capacity of each subsystem, the total transformer loss of each subsystem, and the total line loss of each subsystem includes: Based on Expression 1, the total power control value, the total operating capacity of each subsystem, the total transformer loss of each subsystem, and the total line loss of each subsystem, determine the corresponding power target value for each subsystem. Expression 1 is: ; in, For the first Power target values for each subsystem This refers to the total power control value of the distributed photovoltaic power station. For the first Total startup capacity of each subsystem For the first Total transformer losses in each subsystem For the first Total line loss of each subsystem The number of subsystems.
[0009] In one embodiment, the power control values include outgoing line power control values transmitted for each outgoing line; The steps for allocating corresponding power target values to each subsystem of a distributed photovoltaic power station based on the power control values include: For each subsystem, the power target value of the subsystem is determined by summing the outgoing power control values corresponding to all outgoing lines in the subsystem.
[0010] In one embodiment, the step of allocating the corresponding power generation to each inverter in each subsystem according to the power target value includes: For each inverter in each subsystem, the power generation capacity of the inverter is determined based on the target power value, the total operating capacity of the subsystem, the total transformer loss of the subsystem, the total line loss of the subsystem, and the operating capacity of the inverter.
[0011] In one embodiment, the step of determining the inverter's power generation capacity based on the target power value, the total operating capacity of the subsystem, the total transformer loss of the subsystem, the total line loss of the subsystem, and the inverter's operating capacity includes: Based on Expression 2, the target power value, the total operating capacity of the subsystem, the total transformer loss of the subsystem, the total line loss of the subsystem, and the operating capacity of the inverter, determine the power generation capacity of the inverter. Expression 2 is: ; in, For the first The first subsystem The power generation capacity of an inverter that can operate normally. For the first Total transformer losses in each subsystem For the first Total line loss of each subsystem For the first The first subsystem The operating capacity of a fully functional inverter. For the first The total number of inverters that can operate normally in each subsystem.
[0012] In addition, to achieve the above objectives, this application also proposes a control device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the distributed photovoltaic power station control method as described above.
[0013] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the distributed photovoltaic power station control method described above.
[0014] In addition, to achieve the above objectives, this application also proposes a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the distributed photovoltaic power station control method described above.
[0015] One or more technical solutions proposed in this application have at least the following technical effects: In the distributed photovoltaic (PV) power station control method proposed in this application, the control equipment can first allocate corresponding power target values to each subsystem of the distributed PV power station according to the power control value issued by the grid dispatching terminal. Each subsystem has at least one outgoing line, and each outgoing line has a corresponding inverter. After determining the power target value of each subsystem, the corresponding power generation can be allocated to each inverter within the subsystem according to the power target value of each subsystem. This allows all inverters to operate according to their respective power generation, thereby completing the control of the distributed PV power station. Using the distributed PV power station control method of this application, each distributed PV power station only needs to be configured with one control equipment, which directly performs unified power allocation according to the power control value from the grid dispatching terminal, without the need to configure separate control equipment for each outgoing line for separate management. This effectively reduces the number of control equipment and lowers the hardware cost and subsequent operation and maintenance cost of the distributed PV power station control. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a flowchart illustrating an embodiment of the distributed photovoltaic power station control method of this application. Figure 2 Here is a sample topology diagram of a distributed photovoltaic power station; Figure 3 This is a schematic diagram of the structure of a distributed photovoltaic power station control system; Figure 4 A simplified flowchart illustrating the control method for distributed photovoltaic power plants; Figure 5 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the distributed photovoltaic power station control method in the embodiments of this application.
[0018] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0019] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.
[0020] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.
[0021] The main solution of this application embodiment is: to obtain the power control value issued by the power grid dispatching terminal; to allocate the corresponding power target value to each subsystem of the distributed photovoltaic power station according to the power control value; wherein, each subsystem includes at least one outgoing line of the distributed photovoltaic power station, and each outgoing line is configured with a transformer and an inverter; for each subsystem, to allocate the corresponding power generation to each inverter in the subsystem according to the power target value; and to control all inverters to operate according to their corresponding power generation to complete the control of the distributed photovoltaic power station.
[0022] In related technologies, distributed photovoltaic power stations typically have multiple independent outgoing lines, each equipped with its own independent AGC (Automatic Generation Control) system. That is, each outgoing line is controlled by its own independent control equipment. The grid dispatch center periodically issues active power control values for each outgoing line. The AGC system then allocates these active power control values according to a specific mechanism based on the real-time operating conditions of the current outgoing line. It also assembles the instructions into messages using an agreed-upon communication protocol and sends them to the corresponding inverters on each outgoing line, achieving closed-loop power feedback regulation.
[0023] However, the aforementioned control methods typically treat each outgoing line as an independent control object, configuring a separate set of control equipment for each. On the one hand, each outgoing line is completely independent, physically unconnected, and operates in a fixed mode, making flexible adjustment impossible. On the other hand, configuring a control device for each outgoing line leads to redundancy in control equipment configuration, which increases the construction cost, commissioning work, and maintenance difficulty of distributed photovoltaic power stations.
[0024] To address this, this application provides a control method for a distributed photovoltaic (PV) power station. The control device first allocates corresponding power target values to each subsystem within the distributed PV power station based on the power control values issued by the grid dispatch center. Each subsystem has at least one outgoing line, and each outgoing line has a corresponding inverter. After determining the power target values for each subsystem, the device further allocates the corresponding power generation to each inverter within the subsystem based on the power target values of each subsystem. This allows all inverters to operate according to their respective power generation capacities, thus completing the control of the distributed PV power station. Each distributed PV power station only needs one control device, which directly performs unified power allocation across multiple subsystems based on the power control values from the grid dispatch center, eliminating the need for separate control devices for each outgoing line. This not only achieves flexible and coordinated management of multiple subsystems but also effectively reduces the number of control devices, lowering the hardware costs and subsequent operation and maintenance costs of the distributed PV power station.
[0025] It should be noted that the executing entity in this embodiment is a control device, which can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer or personal computer, or an electronic device capable of performing the above functions. Several embodiments will be described below.
[0026] Based on this, the embodiments of this application provide a control method for a distributed photovoltaic power station, referring to... Figure 1 , Figure 1 This is a flowchart illustrating an embodiment of the distributed photovoltaic power station control method of this application.
[0027] In this embodiment, the above-mentioned distributed photovoltaic power station control method includes steps S100~S400: Step S100: Obtain the power control value issued by the power grid dispatch terminal.
[0028] Step S200: Based on the power control value, allocate the corresponding power target value to each subsystem of the distributed photovoltaic power station; wherein, each subsystem includes at least one outgoing line of the distributed photovoltaic power station, and each outgoing line is equipped with a transformer and an inverter.
[0029] Specifically, the control equipment of a distributed photovoltaic power station can establish a communication protocol with the grid dispatching terminal through communication equipment to receive power control values issued by the grid dispatching terminal in real time or periodically. Based on the power control values issued by the grid dispatching terminal, a reasonable allocation algorithm (such as load-based proportional allocation method, power maximization optimization algorithm, etc.) can be used to allocate the target power output value to each subsystem.
[0030] Typically, a distributed photovoltaic (PV) power station has multiple high-voltage side outgoing lines, each equipped with a corresponding transformer and inverter. The aforementioned subsystems are the multiple components of a distributed PV power station, divided according to its topology, and each subsystem includes at least one outgoing line. In one feasible implementation, the subsystems can be divided based on the connection relationships of the outgoing lines. Therefore, steps A100 to A300 can be specifically included before step S200: Step A100: For each outgoing line, determine whether there is an outgoing line in the distributed photovoltaic power station that is directly or indirectly connected to the outgoing line.
[0031] Step A200: In the case of outgoing lines that are directly or indirectly connected to the outgoing lines, the outgoing lines and the outgoing lines that are directly or indirectly connected to the outgoing lines are divided into a subsystem.
[0032] Step A300: In the absence of outgoing lines that are directly or indirectly connected to the outgoing lines, the outgoing lines are classified as a separate subsystem.
[0033] Assuming a distributed photovoltaic power station S There are a total m This will qualify for the next round. m The outgoing lines are respectively denoted as For a given outgoing line, if it has no physical connection to any other outgoing line, it can be considered a subsystem. If it is directly or indirectly connected to other outgoing lines via a bus tie switch, these connected outgoing lines can be collectively classified as a subsystem. Therefore, based on the connection relationships between the outgoing lines in actual operating conditions, a distributed photovoltaic power station can be divided into... A subsystem, which can be denoted as ;in, Distributed photovoltaic power station S The Subsystem; if the first The number of outgoing lines contained in each subsystem is ( ),but , Indicates the first The first subsystem One line out.
[0034] For ease of understanding, this section combines... Figure 2 Provided as an example, Figure 2 This is a sample topology diagram of a distributed photovoltaic power station. It should be noted that... Figure 2 The illustrations shown are for illustrative purposes only and do not constitute a limitation thereof.
[0035] like Figure 2 The distributed photovoltaic power station shown includes four outgoing lines (outgoing lines) drawn from the high-voltage side busbar. Qualifying Qualifying And qualifying Each outgoing line is equipped with a transformer and an inverter; the inverter is connected to the low-voltage bus via collector lines and switches, and the transformer is connected between the low-voltage bus and the high-voltage bus via collector lines and corresponding switches to achieve high / low voltage transformation. Figure 2 In the middle, they qualified. and qualifying The bus tie switch between them is in the open state, therefore the outgoing line There is no connection between the outgoing lines and other outgoing lines; the outgoing lines can be... As a separate subsystem, it is represented as ; Figure 1 middle, It is not connected to other outgoing lines and constitutes its own subsystem, represented as ; qualifying With qualifying The bus tie switch between them is in the closed state, and the outgoing line... With qualifying The bus tie switch between them is in the closed state, therefore the outgoing line With qualifying Direct connection, outgoing line With qualifying Direct connection, outgoing line With qualifying They can be indirectly connected, thus allowing the outgoing lines to be connected. Qualifying and qualifying These three components are collectively classified into a subsystem, which can be represented as follows: The aforementioned distributed photovoltaic power stations S Based on this, it is divided into two subsystems, which can be represented as follows: .
[0036] After the control equipment identifies each subsystem, it can allocate the target power output value to each subsystem based on the power control value issued by the grid dispatching terminal. In one feasible implementation, the power control value includes the total power control value for the distributed photovoltaic power station; that is, the grid dispatching terminal can adopt a whole-station control mode and directly issue the total power control value for the entire distributed photovoltaic power station; this total power control value is the expected power output value of the distributed photovoltaic power station. Therefore, step S200 can be specifically defined as step S210: Step S210: Determine the power target value for each subsystem based on the total power control value, the total operating capacity of each subsystem, the total transformer loss of each subsystem, and the total line loss of each subsystem.
[0037] Understandably, the total operating capacity of a subsystem represents its maximum output power. A larger total operating capacity means it can handle more power demand, thus allowing for a higher power target value. Total transformer losses and total line losses represent power losses during transmission; subsystems with higher losses have less usable power. Therefore, by comprehensively considering the total operating capacity, total transformer losses, and total line losses of each subsystem, the actual power generation capacity of each subsystem can be measured. Based on this, corresponding power target values can be assigned to each subsystem to achieve a reasonable distribution of the total power control value among the subsystems, avoiding subsystem overload and energy waste.
[0038] Specifically, after obtaining the total power control value issued by the power grid dispatch terminal, the power target value corresponding to each subsystem can be determined according to Expression 1, the total power control value, the total operating capacity of each subsystem, the total transformer loss of each subsystem, and the total line loss of each subsystem. The first expression above is: ; in, For the first Power target values for each subsystem This represents the total power control value for a distributed photovoltaic power station. For the first Total startup capacity of each subsystem For the first Total transformer losses in each subsystem For the first Total line loss of each subsystem The number of subsystems.
[0039] Before determining the power target values for each subsystem, we can first calculate the total operating capacity, total transformer losses, and total line losses for each subsystem. The total operating capacity of each subsystem can be denoted as... ; Indicates the first The total operating capacity of each subsystem is the installed capacity (operating capacity) of all normally functioning inverters within that subsystem. The total transformer losses of each subsystem are expressed as follows: ; Indicates the first The total transformer loss of a subsystem refers to the total active power loss of all operating transformers within that subsystem. The total line loss of each subsystem can be expressed as... ; Indicates the first The total line loss of a subsystem refers to the total active power loss of all transmission lines (i.e., collector lines) within the subsystem. Based on the above values, the corresponding power target values for each subsystem are determined. The total operating capacity, total transformer loss, and total line loss calculated above can also be used for subsequent inverter power generation allocation calculations (detailed later).
[0040] In another feasible implementation, the power control value includes the outgoing line power control value issued for each outgoing line; that is, the grid dispatching terminal can adopt an outgoing line single control mode, issuing the outgoing line power control value corresponding to each outgoing line; the outgoing line power control value is the expected output power value of that outgoing line. Therefore, step S200 can be specifically defined as step S220: Step S220: For each subsystem, determine the power target value of the subsystem based on the sum of the outgoing power control values corresponding to all outgoing lines in the subsystem.
[0041] Specifically, after the control equipment obtains the outgoing power control values sent for each outgoing line, it can summarize and superimpose the outgoing power control values corresponding to the outgoing lines in each subsystem of the distributed photovoltaic power station according to the outgoing line situation of each subsystem, to obtain the power target value corresponding to each subsystem; the calculation process can be represented by Expression 3; Expression 3 is: ; in, For the first Power target values for each subsystem For the power grid dispatch terminal to give the first The first subsystem The outgoing power control value of the outgoing line. For the first The number of lines in each subsystem.
[0042] Step S300: For each subsystem, allocate the corresponding power generation capacity to each inverter in the subsystem according to the power target value.
[0043] Step S400: Control all inverters to operate at their respective power generation capacities to complete the control of the distributed photovoltaic power station.
[0044] After determining the power target value for each subsystem, the power target value can be further allocated to each inverter in the subsystem to determine the power generation capacity of each inverter. In one feasible implementation, step S300 may specifically include step S310: Step S310: For each inverter in each subsystem, determine the inverter's power generation capacity based on the target power value, the total operating capacity of the subsystem, the total transformer loss of the subsystem, the total line loss of the subsystem, and the inverter's operating capacity.
[0045] Specifically, the power target value is the expected actual power output of each subsystem. Based on the power target value, combined with the total transformer loss and total line loss of the subsystem, the total power that all inverters in the subsystem should theoretically output can be determined. Each inverter has a maximum output power, i.e., its operating capacity. This capacity is the maximum power output that the inverter can stably provide under ideal conditions. Therefore, the workload (i.e., power generation) that the inverter can undertake can be determined by combining the inverter's operating capacity. The power generation of each inverter can be determined according to Expression 2. The second expression above is: ; in, For the first The first subsystem The power generation capacity of an inverter that can operate normally. For the first Total transformer losses in each subsystem For the first Total line loss of each subsystem For the first The first subsystem The operating capacity of a fully functional inverter. For the first The total number of inverters that can operate normally in each subsystem.
[0046] After determining the power output of each inverter, the control equipment sends control commands to each inverter to control each inverter to operate according to its corresponding power output, thereby realizing the control of the entire distributed photovoltaic power station.
[0047] It is easy to understand that the distributed photovoltaic power station control method provided in this application embodiment requires only one control device for each distributed photovoltaic power station. This control device directly performs unified power allocation for multiple subsystems based on the power control value from the grid dispatching terminal, without the need to configure separate control devices for each outgoing line for separate management. This not only achieves coordinated and flexible management of multiple subsystems, but also effectively reduces the number of control devices, thereby reducing the hardware cost of distributed photovoltaic power station control and subsequent operation and maintenance costs.
[0048] For example, to help understand the implementation process of the distributed photovoltaic power station control method in Embodiment 1, please refer to... Figures 3-4 , Figure 3 This is a schematic diagram of the structure of a distributed photovoltaic power station control system. Figure 4 This is a simplified flowchart of a distributed photovoltaic power station control method, specifically: like Figure 3 As shown, the distributed photovoltaic power station control system comprises four parts: dispatch communication equipment, control equipment, data acquisition equipment, and inverter management equipment. The specific functions of each part are as follows: The dispatch communication equipment is mainly responsible for receiving power control values sent by the power grid dispatch terminal. At the same time, it can also send the real-time operating status information of the distributed photovoltaic power station itself to the power grid dispatch terminal.
[0049] The data acquisition equipment is mainly responsible for collecting equipment information data from the high and low voltage side busbars, transformers, collector lines and their corresponding switches (circuit breakers, disconnectors, etc.) of the distributed photovoltaic power station, and sending the data to the control equipment so that the control equipment can provide a basis for the formulation of control strategies; for example, determining the division of specific subsystems based on the opening and closing status of the bus tie switch.
[0050] The inverter management device is mainly responsible for collecting real-time signal data from all inverters and uploading it to the control device to provide a basis for the formulation of control strategies. For example, the real-time signal data of each inverter can determine which inverters can operate normally. At the same time, the inverter management device can receive control commands issued by the control device and forward them to the inverters to control each inverter to operate according to its corresponding power generation capacity.
[0051] The control equipment is the main body executing the distributed photovoltaic power station control method of this application. It can obtain the power control value from the grid dispatching terminal from the dispatching communication equipment, and then formulate a control strategy based on the power control value, combined with the operating status of the distributed photovoltaic power station and various constraints. It then distributes the power control value to the inverters, forms control commands, and controls each inverter.
[0052] The specific control process of the control equipment can be referred to Figure 4 Content, such as Figure 4 As shown, the distributed photovoltaic power station can be divided into several subsystems according to the actual connection of each outgoing line in the distributed photovoltaic power station. The operating capacity of each subsystem and various losses (total transformer loss, total line loss, etc.) can be calculated. The specific calculation method can be referred to the description in the aforementioned Example 1, which will not be repeated here.
[0053] Obtain the power control command (including power control values, etc.) issued by the power grid dispatch terminal, and determine which power control mode the power grid dispatch terminal adopts. If the power control value is the total power control value of the distributed photovoltaic power station, it is a whole-station integrated control mode, and the power target value corresponding to each subsystem can be determined by the aforementioned expression one; if the power control value is the outgoing line power control value issued for each outgoing line, it is an outgoing line single control mode, and the power target value corresponding to each subsystem can be determined by the aforementioned expression three.
[0054] After determining the power target value for each subsystem, the power generation capacity can be allocated to each inverter within the subsystem. Specifically, the power generation capacity of each inverter within each subsystem can be calculated using Expression 2. Based on this, control commands can be generated according to the power generation capacity of each inverter and sent to the relevant departments. Figure 3 The inverter management device transmits information to the inverters to control each inverter to operate according to its corresponding power generation capacity, thus completing the correct power response control of the entire distributed photovoltaic power station.
[0055] This application divides the entire distributed photovoltaic power station into several subsystems based on the physical connections between each outgoing line. Based on these subsystems, an adaptive power control adjustment strategy is formulated for two scenarios: either the grid dispatching terminal issues a single total control value (the total power control value of the distributed photovoltaic power station) or multiple outgoing line control values (the outgoing line power control values issued for each outgoing line). This strategy is highly operable, flexible in control, and can greatly reduce redundant configuration of control equipment, thereby lowering the construction cost of the distributed photovoltaic power station control system.
[0056] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the distributed photovoltaic power station control method of this application. Any simple modifications based on this technical concept are within the protection scope of this application.
[0057] This application provides a control device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the distributed photovoltaic power station control method in Embodiment 1 above.
[0058] The following is for reference. Figure 5 The diagram illustrates a structural schematic of a control device suitable for implementing embodiments of this application. The control device in the embodiments of this application may include, but is not limited to, mobile terminals such as laptops, PDAs (Personal Digital Assistants), PADs (Portable Application Description), etc., and fixed terminals such as desktop computers. Figure 5 The control device shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.
[0059] like Figure 5As shown, the control device may include a processing unit 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. The RAM 1004 also stores various programs and data required for the operation of the control device. The processing unit 1001, the ROM 1002, and the RAM 1004 are interconnected 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 input / output interface 1006: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, etc.; output devices 1008 including, for example, a liquid crystal display (LCD); storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. Communication device 1009 allows the control device to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows control devices with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented alternatively.
[0060] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from read-only memory 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.
[0061] The control device provided in this application, employing the distributed photovoltaic power station control method described in the above embodiments, can solve the technical problems of configuration redundancy and high cost associated with independently configuring control devices for each outgoing line of a distributed photovoltaic power station in related technologies. Compared with related technologies, the beneficial effects of the control device provided in this application are the same as those of the distributed photovoltaic power station control method provided in the above embodiments, and other technical features of this control device are the same as those disclosed in the previous embodiment method, and will not be repeated here.
[0062] 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 suitable manner in one or more embodiments or examples.
[0063] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
[0064] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, which are used to execute the distributed photovoltaic power station control method in the above embodiments.
[0065] 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 or devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.
[0066] The aforementioned computer-readable storage medium may be included in the control device; or it may exist independently and not assembled into the control device.
[0067] The aforementioned computer-readable storage medium carries one or more programs. When the aforementioned one or more programs are executed by the control device, the control device causes the control device to: acquire power control values issued by the power grid dispatching terminal; allocate corresponding power target values to each subsystem of the distributed photovoltaic power station according to the power control values; wherein each subsystem includes at least one outgoing line of the distributed photovoltaic power station, and each outgoing line is configured with a transformer and an inverter; for each subsystem, allocate corresponding power generation to each inverter in the subsystem according to the power target values; and control all inverters to operate at their respective corresponding power generation to complete the control of the distributed photovoltaic power station.
[0068] Computer program code for performing the operations of this application can be written in one or more programming languages or a combination thereof, including object-oriented programming languages such as Java, Smalltalk, and C++, and conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).
[0069] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.
[0070] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.
[0071] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the above-described distributed photovoltaic power station control method. This solves the technical problems of configuration redundancy and high cost associated with independently configured control devices for each outgoing line in related technologies. Compared with related technologies, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the distributed photovoltaic power station control method provided in the above embodiments, and will not be elaborated upon here.
[0072] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the distributed photovoltaic power station control method described above.
[0073] The computer program product provided in this application can solve the technical problems of configuration redundancy and high cost in the independent configuration of control equipment for each outgoing line of a distributed photovoltaic power station in related technologies. Compared with related technologies, the beneficial effects of the computer program product provided in this application are the same as those of the distributed photovoltaic power station control method provided in the above embodiments, and will not be repeated here.
[0074] The above description is only a part of the embodiments of this application and does not limit the scope of protection. All equivalent structural transformations made under the technical concept of this application and using the content of this application specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection.
Claims
1. A control method for a distributed photovoltaic power station, characterized in that, The distributed photovoltaic power station control method, used for controlling equipment, includes: Obtain the power control values issued by the power grid dispatching terminal; Based on the power control value, a corresponding power target value is allocated to each subsystem of the distributed photovoltaic power station; wherein each subsystem includes at least one outgoing line of the distributed photovoltaic power station, and each outgoing line is equipped with a transformer and an inverter. For each subsystem, the corresponding power generation capacity is allocated to each inverter in the subsystem according to the power target value; Control all the inverters to operate at their respective power outputs to complete the control of the distributed photovoltaic power station.
2. The distributed photovoltaic power station control method as described in claim 1, characterized in that, Before the step of allocating corresponding power target values to each subsystem of the distributed photovoltaic power station based on the power control value, the method further includes: For each outgoing line, determine whether there is an outgoing line in the distributed photovoltaic power station that is directly or indirectly connected to the outgoing line; In the case of outgoing lines that are directly or indirectly connected to the outgoing line, the outgoing line and the outgoing lines that are directly or indirectly connected to the outgoing line are divided into a subsystem; In the absence of any outgoing lines that are directly or indirectly connected to the outgoing line, the outgoing line is classified as a separate subsystem.
3. The distributed photovoltaic power station control method as described in claim 1, characterized in that, The power control value includes the total power control value of the distributed photovoltaic power station; The step of allocating corresponding power target values to each subsystem of the distributed photovoltaic power station based on the power control value includes: Based on the total power control value, the total operating capacity of each subsystem, the total transformer loss of each subsystem, and the total line loss of each subsystem, the power target value corresponding to each subsystem is determined.
4. The distributed photovoltaic power station control method as described in claim 3, characterized in that, The step of determining the power target value corresponding to each subsystem based on the total power control value, the total operating capacity of each subsystem, the total transformer loss of each subsystem, and the total line loss of each subsystem includes: Based on Expression 1, the total power control value, the total operating capacity of each subsystem, the total transformer loss of each subsystem, and the total line loss of each subsystem, determine the power target value corresponding to each subsystem. The first expression is: ; in, For the first Power target values for each subsystem This refers to the total power control value of the distributed photovoltaic power station. For the first Total startup capacity of each subsystem For the first Total transformer losses in each subsystem For the first Total line loss of each subsystem The number of subsystems.
5. The distributed photovoltaic power station control method as described in claim 1, characterized in that, The power control values include outgoing power control values sent for each outgoing line; The step of allocating corresponding power target values to each subsystem of the distributed photovoltaic power station based on the power control value includes: For each subsystem, the power target value of the subsystem is determined based on the sum of the outgoing power control values corresponding to all outgoing lines in the subsystem.
6. The distributed photovoltaic power station control method as described in any one of claims 1 to 5, characterized in that, The step of allocating the corresponding power generation to each inverter in each subsystem according to the power target value includes: For each inverter in each subsystem, the power generation capacity of the inverter is determined based on the target power value, the total operating capacity of the subsystem, the total transformer loss of the subsystem, the total line loss of the subsystem, and the operating capacity of the inverter.
7. The distributed photovoltaic power station control method as described in claim 6, characterized in that, The step of determining the power generation capacity of the inverter based on the power target value, the total operating capacity of the subsystem, the total transformer loss of the subsystem, the total line loss of the subsystem, and the operating capacity of the inverter includes: Based on Expression 2, the target power value, the total operating capacity of the subsystem, the total transformer loss of the subsystem, the total line loss of the subsystem, and the operating capacity of the inverter, the power generation capacity of the inverter is determined. The second expression is: ; in, For the first The first subsystem The power generation capacity of an inverter that can operate normally. For the first Total transformer losses in each subsystem For the first Total line loss of each subsystem For the first The first subsystem The operating capacity of a fully functional inverter. For the first The total number of inverters that can operate normally in each subsystem.
8. A control device, characterized in that, The control device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the distributed photovoltaic power station control method as described in any one of claims 1 to 7.
9. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the distributed photovoltaic power station control method as described in any one of claims 1 to 7.
10. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the steps of the distributed photovoltaic power station control method as described in any one of claims 1 to 7.