A method, device, electronic device and storage medium for controlling multi-distributed photovoltaic power in a distribution area

Abstract

The present invention discloses a multi-distributed photovoltaic power control method, device, electronic device and storage medium in a distribution station area. The method includes: obtaining the voltage value of each node in the area, the current output of each distributed photovoltaic and the total load of the area; calculating the minimum guaranteed output of each distributed photovoltaic; judging whether there is a node in the area whose voltage exceeds the upper limit according to the voltage value of each node; if so, for each node whose voltage exceeds the upper limit, calculating the unit adjustment value of each distributed photovoltaic, and adjusting the distributed photovoltaic output in sequence according to the unit adjustment value until the current node voltage does not exceed the upper limit; if not, calculating the total output of the distributed photovoltaic, and when the total output of the distributed photovoltaic is greater than the total load of the area, calculating the proportion of its current output to the total output of the distributed photovoltaic for each distributed photovoltaic, and reducing the output of the distributed photovoltaic according to the proportion; by implementing the present invention, the problem of node voltage exceeding the upper limit and power backflow in the area can be solved.

Description

Technical Field

[0001] The present invention relates to the field of distributed photovoltaic control technology, and in particular to a method, device, electronic equipment and storage medium for controlling multi-distributed photovoltaic power in a power distribution area. Background Art

[0002] In recent years, with the transformation of the global energy structure and the increasing demand for renewable energy, distributed photovoltaic power generation systems have rapidly become popular across the globe. As a clean and efficient form of energy, distributed photovoltaic power generation offers the advantages of local generation and consumption, effectively reducing reliance on traditional fossil fuels and lowering greenhouse gas emissions. In particular, within the distributed structure of the power grid, photovoltaic power generation systems, as a key form of distributed power generation, not only provide users with a stable power supply but also alleviate grid load pressure to a certain extent, enhancing power supply reliability.

[0003] However, as the number and scale of distributed photovoltaic power generation connected to the grid continue to increase, traditional distribution networks are facing new challenges. The large-scale integration of distributed photovoltaic power generation has changed the direction of power flow in the power system, gradually shifting the power transmission mode within distribution areas from the traditional one-way transmission to multi-directional transmission. Under good sunlight conditions, the output of distributed photovoltaic power generation may far exceed user demand, resulting in excess power being fed back into the grid. This power backflow phenomenon not only increases the complexity of grid management but can also cause local voltage fluctuations and even cause the voltage at some nodes to exceed the set safety limit, affecting the stable operation of the grid. Summary of the Invention

[0004] Embodiments of the present invention provide a method, device, electronic device, and storage medium for controlling the power of multiple distributed photovoltaic systems within a distribution substation. Implementation of the present invention enables power control of multiple distributed photovoltaic systems within a distribution substation, resolving the existing issues of voltage exceeding upper limits and power backflow caused by excessive distributed photovoltaic output, thereby improving the operational stability of the distribution substation.

[0005] An embodiment of the present invention provides a method for controlling multi-distributed photovoltaic power in a distribution area, comprising:

[0006] Obtain the real-time voltage value of each node in the control area, the distance from each distributed photovoltaic to any node, the rated capacity of each distributed photovoltaic, the current output of each distributed photovoltaic, the power supply radius of the area and the total load of the area.

[0007] Calculate the minimum guaranteed output of each distributed photovoltaic system based on the power supply radius of the substation, the distance from each distributed photovoltaic system to the head end node of the substation, and the rated capacity of each distributed photovoltaic system;

[0008] Compare the real-time voltage value of each node in the substation with the preset voltage upper limit to determine whether there is a node whose voltage exceeds the upper limit;

[0009] If so, for each node whose voltage exceeds the upper limit, calculate the unit adjustment value of each distributed photovoltaic system based on the minimum guaranteed output and the current output of each distributed photovoltaic system. Based on the unit adjustment value, adjust the output of the corresponding distributed photovoltaic system in order from the nearest to the node whose voltage exceeds the upper limit until the voltage of the current node does not exceed the upper limit.

[0010] If not, calculate the sum of the current outputs of each distributed photovoltaic system to obtain the total output of distributed photovoltaic systems; compare the total output of distributed photovoltaic systems with the total load of the substation;

[0011] When the total output of distributed photovoltaics is greater than the total load of the substation, for each distributed photovoltaic, the proportion of its current output to the total output of distributed photovoltaics is calculated, and the output of the distributed photovoltaic is reduced according to the proportion, the total load of the substation and the minimum guaranteed output.

[0012] Furthermore, the multi-distributed photovoltaic power control method in the distribution station area also includes: when the total output of the distributed photovoltaic is less than or equal to the total load of the area, for each distributed photovoltaic, the proportion of its current output to the total output of the distributed photovoltaic is calculated, and the output of the distributed photovoltaic is increased according to the proportion and the total load of the area.

[0013] Furthermore, the calculation of the minimum guaranteed output of each distributed photovoltaic system based on the power supply radius of the substation, the distance from each distributed photovoltaic system to the substation headend node, and the rated capacity of each distributed photovoltaic system includes: for each distributed photovoltaic system, calculating the quotient of the distance from the distributed photovoltaic system to the substation headend node and the power supply radius of the substation to obtain a first value;

[0014] The minimum guaranteed output of the distributed photovoltaic system is calculated based on the first value and the rated capacity of the distributed photovoltaic system.

[0015] Furthermore, the calculating of the unit adjustment value of each distributed photovoltaic system according to the minimum guaranteed output and the current output of each distributed photovoltaic system includes: for each distributed photovoltaic system, calculating the difference between its current output and the corresponding minimum guaranteed output to obtain a first difference value;

[0016] The unit regulation value of the distributed photovoltaic is calculated based on the first difference and the preset regulation unit.

[0017] Furthermore, the step of adjusting the output of the corresponding distributed photovoltaic units in order of proximity to the node with the voltage exceeding the upper limit according to the unit adjustment value until the voltage of the current node does not exceed the upper limit includes: selecting a target distributed photovoltaic unit and repeatedly performing the output adjustment operation until the voltage of the current node does not exceed the upper limit; wherein the initial target distributed photovoltaic unit is the distributed photovoltaic unit closest to the node with the voltage exceeding the upper limit;

[0018] The output adjustment operation includes:

[0019] Determine whether the current output of the target distributed photovoltaic system is greater than its minimum guaranteed output.

[0020] If so, calculate the difference between its current output and its unit adjustment value to obtain a second difference; adjust the current output of the current target distributed photovoltaic to the larger value of the second difference and its minimum guaranteed output; measure the real-time voltage value of the current node, and compare it with the preset voltage upper limit to determine whether the node voltage exceeds the upper limit;

[0021] If not, determine whether there is distributed photovoltaic power generation that has not adjusted its output.

[0022] In the case of distributed photovoltaics that have not adjusted their output, the distributed photovoltaics that are closest to the current node and have not adjusted their output are selected as the updated target distributed photovoltaics;

[0023] In the absence of distributed photovoltaic power generation with unadjusted output, the system enters the alarm state.

[0024] Furthermore, the calculating of the ratio of the current output of the distributed photovoltaic system to the total output of the distributed photovoltaic system, and reducing the output of the distributed photovoltaic system according to the ratio, the total load of the substation, and the minimum guaranteed output, includes: calculating the ratio of the current output of the distributed photovoltaic system to the total output of the distributed photovoltaic system, and using the obtained ratio as the control ratio of the distributed photovoltaic system;

[0025] Calculate the difference between the total output of the distributed photovoltaic system and the total load of the substation to obtain a third difference; calculate the regulated power of the distributed photovoltaic system based on the third difference and the regulation ratio;

[0026] The difference between the current output of the current distributed photovoltaic system and the regulated power is calculated to obtain a fourth difference; and the current output of the current distributed photovoltaic system is adjusted to a larger value between the fourth difference and the minimum guaranteed output.

[0027] Furthermore, the calculating of the ratio of the current output of the distributed photovoltaic system to the total output of the distributed photovoltaic system, and increasing the output of the distributed photovoltaic system according to the ratio and the total load of the substation, includes: calculating the ratio of the current output of the distributed photovoltaic system to the total output of the distributed photovoltaic system, and using the obtained ratio as the control ratio of the distributed photovoltaic system;

[0028] Calculate the difference between the total load of the substation and the total output of the distributed photovoltaic system to obtain a fifth difference; calculate the regulated power of the distributed photovoltaic system based on the fifth difference and the regulation ratio; adjust the current output of the current distributed photovoltaic system to the sum of the regulated power and the current output of the current distributed photovoltaic system.

[0029] Based on the above method embodiments, the present invention provides corresponding device embodiments.

[0030] An embodiment of the present invention provides a multi-distributed photovoltaic power control device in a distribution station area, including: a data acquisition module, a minimum guaranteed output generation module, an over-limit judgment module, an over-limit adjustment module, a power backflow judgment module and a power backflow adjustment module.

[0031] The data acquisition module is used to obtain the real-time voltage value of each node in the control area, the distance from each distributed photovoltaic to any node, the rated capacity of each distributed photovoltaic, the current output of each distributed photovoltaic, the power supply radius of the area and the total load of the area;

[0032] The minimum guaranteed output generation module is used to calculate the minimum guaranteed output of each distributed photovoltaic according to the power supply radius of the substation, the distance from each distributed photovoltaic to the head end node of the substation, and the rated capacity of each distributed photovoltaic;

[0033] The over-limit judgment module is used to compare the real-time voltage value of each node in the substation with the preset voltage upper limit to determine whether there is a node whose voltage exceeds the upper limit;

[0034] The over-limit adjustment module is configured to, when there is a node whose voltage exceeds the upper limit, calculate, for each node whose voltage exceeds the upper limit, a unit adjustment value of each distributed photovoltaic system based on the minimum guaranteed output and the current output of each distributed photovoltaic system, and adjust the output of the corresponding distributed photovoltaic system in order of proximity to the node whose voltage exceeds the upper limit, from nearest to furthest, according to the unit adjustment value, until the voltage of the current node does not exceed the upper limit;

[0035] The power backflow judgment module is used to calculate the sum of the current outputs of each distributed photovoltaic system when there is no node with a voltage exceeding the upper limit, to obtain the total output of the distributed photovoltaic system; and compare the total output of the distributed photovoltaic system with the total load of the substation;

[0036] The power backflow adjustment module is used to calculate the proportion of the current output of each distributed photovoltaic to the total output of the distributed photovoltaic when the total output of the distributed photovoltaic is greater than the total load of the substation, and reduce the output of the distributed photovoltaic according to the proportion, the total load of the substation and the minimum guaranteed output.

[0037] Based on the above method embodiment, the present invention provides a corresponding electronic device embodiment.

[0038] An embodiment of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the multi-distributed photovoltaic power control method for a distribution station area described in any one of the above-mentioned method embodiments can be implemented.

[0039] Based on the above method embodiment, the present invention provides a corresponding storage medium embodiment.

[0040] An embodiment of the present invention provides a storage medium having a computer program stored thereon. When the computer program is executed by a processor, the multi-distributed photovoltaic power control method for a distribution station area described in any one of the above method embodiments can be implemented.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] The embodiment of the present invention discloses a method, device, electronic device and storage medium for controlling the power of multiple distributed photovoltaics in a distribution station area. The method compares the real-time voltage value of each node in the area with a preset voltage upper limit to determine whether there is a node with a voltage exceeding the upper limit. When it is determined that there is a node with a voltage exceeding the upper limit, the unit adjustment value of each distributed photovoltaic is calculated based on the minimum guaranteed output and the current output of each distributed photovoltaic. According to the unit adjustment value, the corresponding distributed photovoltaic output is adjusted in order from near to far from the node with a voltage exceeding the upper limit, until the current node voltage does not exceed the upper limit, thereby solving the problem of voltage exceeding the upper limit caused by excessive distributed photovoltaic output in the prior art. In addition, when the total output of distributed photovoltaics is greater than the total load of the area, for each distributed photovoltaic, the proportion of its current output to the total output of distributed photovoltaics is calculated, and the output is reduced according to the proportion, the total load of the area and the minimum guaranteed output. By reducing the output, the power backflow phenomenon caused by the output of distributed photovoltaic power generation exceeding user demand is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 The figure is a flow chart of a multi-distributed photovoltaic power control method in a distribution station area provided by an embodiment of the present invention.

[0044] Figure 2 It is a flowchart of a method for controlling multi-distributed photovoltaic power in a distribution station area provided by another embodiment of the present invention.

[0045] Figure 3 It is a structural diagram of a multi-distributed photovoltaic power control device in a distribution station area provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0046] 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] like Figure 1 As shown, an embodiment of the present invention provides a method for controlling multi-distributed photovoltaic power in a distribution station area, which includes at least the following steps:

[0048] Step S1: Obtain the real-time voltage value of each node in the control area, the distance from each distributed photovoltaic to any node, the rated capacity of each distributed photovoltaic, the current output of each distributed photovoltaic, the power supply radius of the area and the total load of the area;

[0049] The distance is the geographical distance; the nodes in the substation area include the substation head-end node and each user's grid-connected node.

[0050] Step S2: Calculate the minimum guaranteed output of each distributed photovoltaic system based on the power supply radius of the substation, the distance from each distributed photovoltaic system to the substation headend node, and the rated capacity of each distributed photovoltaic system;

[0051] In a preferred embodiment, the minimum guaranteed output of each distributed photovoltaic system is calculated using the following formula:

[0052]

[0053] in, Indicates the minimum guarantee output; Indicates the rated capacity of distributed photovoltaics; Indicates the distance from the distributed photovoltaic to the head end node of the substation; Indicates the power supply radius of the substation; The identifier of distributed photovoltaics, the maximum value of which is the number of distributed photovoltaics in the substation.

[0054] According to the formula, the farther the distributed photovoltaic system is from the head end of the substation, the smaller its minimum guaranteed output.

[0055] Step S3: Compare the real-time voltage value of each node in the substation with the preset voltage upper limit to determine whether there is a node whose voltage exceeds the upper limit;

[0056] For each substation node, compare it with the preset voltage upper limit. If the node's real-time voltage value is greater than the preset voltage upper limit, the node has exceeded the voltage upper limit. If the node's real-time voltage value is less than or equal to the preset voltage upper limit, the node has not exceeded the voltage upper limit. The preset voltage upper limit can be set according to actual conditions; here, it is set to 235V.

[0057] Step S4: If yes, for each node whose voltage exceeds the upper limit, calculate the unit adjustment value of each distributed photovoltaic system based on the minimum guaranteed output and the current output of each distributed photovoltaic system. Based on the unit adjustment value, adjust the output of the corresponding distributed photovoltaic system in order from the nearest to the node whose voltage exceeds the upper limit until the voltage of the current node does not exceed the upper limit.

[0058] In an optional embodiment, the unit regulation value of each distributed photovoltaic is calculated by the following formula:

[0059]

[0060] in, Indicates the unit adjustment value; Indicates the current output of distributed photovoltaics; Indicates the minimum guaranteed output of distributed photovoltaics; Indicates the preset control unit; The identifier of distributed photovoltaic, the maximum value of which is the number of distributed photovoltaic in the area. It can be set according to actual conditions. Here the value is 10.

[0061] Specifically, in another preferred embodiment, adjusting the output of the corresponding distributed photovoltaic units in order of proximity to the node with the voltage exceeding the upper limit according to the unit adjustment value until the voltage of the current node does not exceed the upper limit includes: selecting a target distributed photovoltaic unit and repeatedly performing the output adjustment operation until the voltage of the current node does not exceed the upper limit; wherein the initial target distributed photovoltaic unit is the distributed photovoltaic unit closest to the node with the current voltage exceeding the upper limit;

[0062] The output adjustment operation includes:

[0063] Determine whether the current output of the target distributed photovoltaic system is greater than its minimum guaranteed output.

[0064] If so, calculate the difference between its current output and its unit adjustment value to obtain a second difference; compare the second difference with its minimum guaranteed output, and use the larger value as the updated value of the current output of the current target distributed photovoltaic system; measure the real-time voltage value of the current node, and compare it with the preset voltage upper limit to determine whether the node voltage exceeds the upper limit;

[0065] If not, determine whether there is distributed photovoltaic power generation that has not adjusted its output.

[0066] In the case of distributed photovoltaics that have not adjusted their output, the distributed photovoltaics that are closest to the current node and have not adjusted their output are selected as the updated target distributed photovoltaics;

[0067] In the absence of distributed photovoltaic power generation with unadjusted output, the system enters the alarm state.

[0068] It should be noted that by reducing the output of each distributed photovoltaic system, the voltage value of each node in the distribution station area can be reduced, and overall coordinated regulation can be achieved, avoiding the problem that the isolated regulation mode makes it difficult for each distributed photovoltaic system to work together when responding to grid fluctuations, thereby reducing the overall regulation capability and efficiency of the grid.

[0069] In a preferred embodiment, in a typical operation day, there are two nodes in the substation where the voltage exceeds the upper limit, which are numbered in order from the nearest to the farthest distance from the head end. , and their voltage values ​​are There are 3 distributed photovoltaic units, numbered in order from the nearest to the farthest distance from the head end. , adjust the corresponding distributed photovoltaic output until the node The voltage does not exceed the upper limit.

[0070] First, calculate the minimum guaranteed output of each distributed photovoltaic system, and obtain 、 、 , and obtain the current output of each distributed photovoltaic 、 、 Calculate the unit regulation value of each distributed photovoltaic 、 、 , preset control unit The value is 10, and the preset voltage upper limit is 235V.

[0071] Adjust the first voltage exceeding the upper limit node The voltage of the three distributed photovoltaics is in the following order from near to far. .

[0072] Will The output is adjusted down to 37kW. Since the output has reached the minimum guaranteed output of the distributed photovoltaic system, it cannot be further reduced.

[0073] Will The output is adjusted down to 31kW. , so the first voltage exceeds the upper limit node The problem of voltage exceeding the upper limit has been solved.

[0074] Then adjust the second voltage to exceed the upper limit node The voltage of the three distributed photovoltaics is in the following order from near to far. .

[0075] Will The output is adjusted down to 28.2kW. , so the second voltage exceeds the upper limit node The problem of voltage exceeding the upper limit has been solved.

[0076] Step S5: If not, calculate the sum of the current outputs of each distributed photovoltaic system to obtain the total distributed photovoltaic output; compare the total distributed photovoltaic output with the total load of the substation;

[0077] The current output of each distributed photovoltaic is added together, and the result is the total distributed photovoltaic processing of the distribution station area. The total distributed photovoltaic output is then compared with the total load of the station area, and corresponding steps are executed according to the comparison result.

[0078] Step S6: When the total output of distributed photovoltaics is greater than the total load of the substation, for each distributed photovoltaic, calculate the proportion of its current output to the total output of distributed photovoltaics, and reduce the output of the distributed photovoltaics according to the proportion, the total load of the substation and the minimum guaranteed output.

[0079] Preferably, the calculating the ratio of the current output to the total output of the distributed photovoltaic system, and reducing the output of the distributed photovoltaic system according to the ratio, the total load of the area, and the minimum guaranteed output, includes:

[0080] Calculate the ratio of the current output of the distributed photovoltaic system to the total output of the distributed photovoltaic system, and use the obtained ratio as the control ratio of the distributed photovoltaic system;

[0081] Calculate the difference between the total output of the distributed photovoltaic system and the total load of the substation to obtain a third difference; calculate the product of the third difference and the regulation ratio to obtain a product result, and use the product result as the regulation power of the distributed photovoltaic system;

[0082] The difference between the current output of the current distributed photovoltaic system and the regulated power is calculated to obtain a fourth difference; and the current output of the current distributed photovoltaic system is adjusted to a larger value between the fourth difference and the minimum guaranteed output.

[0083] It should be noted that the current output of the distributed photovoltaic system is adjusted to the larger of the fourth difference and its minimum guaranteed output because, when the fourth difference is greater than the minimum guaranteed output, this indicates that even after reducing the output based on the current regulated power, the output of the distributed photovoltaic system is still higher than its minimum guaranteed output, thus maintaining stable operation of the distributed photovoltaic system. Conversely, if the fourth difference is less than the minimum guaranteed output, this indicates that even after reducing the output based on the current regulated power, the output of the distributed photovoltaic system is already lower than its minimum guaranteed output. Reducing the output based on the regulated power value will result in abnormal operation of the distributed photovoltaic system. Therefore, the output can only be adjusted to the minimum guaranteed output of the distributed photovoltaic system.

[0084] like Figure 2 As shown, another embodiment of the present invention provides a method for controlling multi-distributed photovoltaic power in a distribution station area. In addition to steps S1 to S6 of the above embodiment, the method further includes the following steps after step S6:

[0085] Step S7: When the total output of distributed photovoltaics is less than or equal to the total load of the substation, for each distributed photovoltaic, calculate the proportion of its current output to the total output of distributed photovoltaics, and increase the output of the distributed photovoltaics according to the proportion and the total load of the substation.

[0086] In actual operation, the calculation of the proportion of the current output to the total output of the distributed photovoltaic system and the increase of the output of the distributed photovoltaic system according to the proportion and the total load of the substation include:

[0087] Calculate the ratio of the current output of the distributed photovoltaic system to the total output of the distributed photovoltaic system, and use the obtained ratio as the control ratio of the distributed photovoltaic system;

[0088] Calculate the difference between the total load of the substation and the total output of the distributed photovoltaic system to obtain a fifth difference; calculate the regulated power of the distributed photovoltaic system based on the fifth difference and the regulation ratio; adjust the current output of the current distributed photovoltaic system to the sum of the regulated power and the current output of the current distributed photovoltaic system.

[0089] It should be noted that when the total output of distributed PV is less than or equal to the total load of the substation, the distributed PV output is increased. This is because when the substation's load demand exceeds the distributed PV's power generation output, the substation will demand additional power from the grid. This will lead to excessive dependence on the grid, increase the burden on the grid, and reduce the substation's operational independence and energy efficiency. In the long term, this dependence may not only increase the pressure on the grid, but also make the substation unable to effectively respond to grid anomalies or load peaks, affecting the stability and reliability of power supply. The purpose of increasing the output of distributed PV at this time is to reduce the power demanded by the substation from the grid, thereby improving its operational independence and energy efficiency.

[0090] Based on the above method embodiments, the present invention provides corresponding device embodiments.

[0091] like Figure 3 As shown, an embodiment of the present invention provides a multi-distributed photovoltaic power control device in a distribution station area, including: a data acquisition module 101, a minimum guaranteed output generation module 102, an over-limit judgment module 103, an over-limit adjustment module 104, a power backflow judgment module 105 and a power backflow adjustment module 106.

[0092] The data acquisition module 101 is used to obtain the real-time voltage value of each node in the control area, the distance from each distributed photovoltaic to any node, the rated capacity of each distributed photovoltaic, the current output of each distributed photovoltaic, the power supply radius of the area and the total load of the area;

[0093] The minimum guaranteed output generation module 102 is used to calculate the minimum guaranteed output of each distributed photovoltaic according to the power supply radius of the substation, the distance from each distributed photovoltaic to the substation headend node, and the rated capacity of each distributed photovoltaic;

[0094] The over-limit judgment module 103 is used to compare the real-time voltage value of each node in the substation with the preset voltage upper limit to determine whether there is a node whose voltage exceeds the upper limit;

[0095] The over-limit adjustment module 104 is configured to, when there is a node with a voltage exceeding the upper limit, calculate, for each node with a voltage exceeding the upper limit, a unit adjustment value of each distributed photovoltaic system based on the minimum guaranteed output and the current output of each distributed photovoltaic system, and adjust the output of the corresponding distributed photovoltaic system in order of proximity to the node with a voltage exceeding the upper limit, until the voltage of the current node does not exceed the upper limit, based on the unit adjustment value.

[0096] The power backflow determination module 105 is configured to calculate the sum of the current outputs of each distributed photovoltaic system when there is no node with a voltage exceeding the upper limit, to obtain the total output of the distributed photovoltaic system; and compare the total output of the distributed photovoltaic system with the total load of the substation.

[0097] The power backflow adjustment module 106 is used to calculate the ratio of the current output of each distributed photovoltaic to the total output of the distributed photovoltaic when the total output of the distributed photovoltaic is greater than the total load of the substation, and reduce the output of the distributed photovoltaic according to the ratio, the total load of the substation and the minimum guaranteed output.

[0098] It should be noted that the embodiments of the device described above correspond to the above-mentioned embodiments of the present invention, and can implement any of the methods described above in the present invention. In addition, the embodiments of the above-mentioned device are merely schematic, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the drawings of the embodiment of the device provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which can be specifically implemented as one or more communication buses or signal lines. A person of ordinary skill in the art can understand and implement it without paying any creative work.

[0099] Based on the above method embodiment of the present invention, a corresponding electronic device embodiment is provided.

[0100] An embodiment of the present invention provides an electronic device, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, the multi-distributed photovoltaic power control method for a distribution station area described in any one of the present invention is implemented, or when the processor executes the computer program, the functions of the modules in the above-mentioned device embodiments are implemented.

[0101] Exemplarily, the computer program may be divided into one or more modules, which are stored in the memory and executed by the processor to implement the present invention. The one or more modules may be a series of computer program instruction segments capable of performing specific functions, and the instruction segments are used to describe the execution process of the computer program in the terminal device.

[0102] The terminal device may be a computing device such as a desktop computer, a notebook computer, a PDA, a cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0103] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor. The processor is the control center of the terminal device and connects various parts of the entire terminal device using various interfaces and lines.

[0104] The memory can be used to store the computer programs and / or modules. The processor implements the various functions of the terminal device by running or executing the computer programs and / or modules stored in the memory and accessing the data stored in the memory. The memory may mainly include a program storage area and a data storage area. The program storage area may store an operating system, at least one application required for a function, etc.; the data storage area may store data created based on the use of the mobile phone, etc. In addition, the memory may include high-speed random access memory and non-volatile memory, such as a hard disk, internal memory, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, at least one disk storage device, a flash memory device, or other volatile solid-state storage device.

[0105] Based on the above method embodiment, the present invention provides a corresponding storage medium embodiment;

[0106] Another embodiment of the present invention provides a storage medium, which includes a stored computer program. When the computer program is executed, the device where the storage medium is located is controlled to execute any of the above-mentioned multi-distributed photovoltaic power control methods in the distribution station area of ​​the present invention.

[0107] The aforementioned storage medium is a computer-readable storage medium, and the computer program includes computer program code, which may be in source code form, object code form, an executable file, or some intermediate form. The computer-readable medium may include any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a removable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electric carrier signal, a telecommunications signal, and a software distribution medium. It should be noted that the content of the computer-readable medium may be appropriately increased or decreased based on the requirements of legislation and patent practice within a jurisdiction. For example, in some jurisdictions, based on legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunications signals.

[0108] In the description of this specification, the reference terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless they are mutually inconsistent.

[0109] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for controlling multi-distributed photovoltaic power in a distribution area, characterized in that: include: Obtain the real-time voltage value of each node in the control area, the distance from each distributed photovoltaic to any node, the rated capacity of each distributed photovoltaic, the current output of each distributed photovoltaic, the power supply radius of the area and the total load of the area; Calculate the minimum guaranteed output of each distributed photovoltaic system based on the power supply radius of the substation, the distance from each distributed photovoltaic system to the head end node of the substation, and the rated capacity of each distributed photovoltaic system; Compare the real-time voltage value of each node in the substation area with the preset voltage upper limit to determine whether there is a node whose voltage exceeds the upper limit; If so, for each node whose voltage exceeds the upper limit, calculate the unit adjustment value of each distributed photovoltaic system based on the minimum guaranteed output and the current output of each distributed photovoltaic system. Based on the unit adjustment value, adjust the output of the corresponding distributed photovoltaic system in order from the nearest to the node whose voltage exceeds the upper limit until the voltage of the current node does not exceed the upper limit. If not, calculate the sum of the current outputs of each distributed photovoltaic system to obtain the total output of distributed photovoltaic systems; compare the total output of distributed photovoltaic systems with the total load of the substation; When the total output of distributed photovoltaics is greater than the total load of the substation, for each distributed photovoltaic, calculate the ratio of its current output to the total output of distributed photovoltaics, and reduce the output of the distributed photovoltaic according to the ratio, the total load of the substation and the minimum guaranteed output; The calculation of the minimum guaranteed output of each distributed photovoltaic system based on the power supply radius of the substation, the distance from each distributed photovoltaic system to the head-end node of the substation, and the rated capacity of each distributed photovoltaic system includes: For each distributed photovoltaic, calculate the quotient of the distance from the photovoltaic to the head end node of the substation and the power supply radius of the substation to obtain a first value; Calculating the minimum guaranteed output of the distributed photovoltaic system based on the first value and the rated capacity of the distributed photovoltaic system; The calculating the unit adjustment value of each distributed photovoltaic system according to the minimum guaranteed output and the current output of each distributed photovoltaic system includes: For each distributed photovoltaic system, calculate the difference between its current output and the corresponding minimum guaranteed output to obtain a first difference value; Calculating a unit regulation value of the distributed photovoltaic system based on the first difference and a preset regulation unit; The step of adjusting the corresponding distributed photovoltaic outputs according to the unit adjustment value in order from near to far from the node whose voltage exceeds the upper limit until the voltage of the current node does not exceed the upper limit includes: Select the target distributed photovoltaic power plant and repeatedly adjust the output until the current node voltage does not exceed the upper limit. The starting target distributed photovoltaic power plant is the distributed photovoltaic power plant closest to the node where the current voltage exceeds the upper limit. The output adjustment operation includes: Determine whether the current output of the current target distributed photovoltaic is greater than its minimum guaranteed output, If so, the difference between its current output and its unit adjustment value is calculated to obtain a second difference; the current output of the current target distributed photovoltaic is adjusted to the larger value between the second difference and its minimum guaranteed output; the real-time voltage value of the current node is measured and compared with the preset voltage upper limit to determine whether the node voltage exceeds the upper limit; If not, determine whether there is distributed photovoltaic power generation that has not adjusted its output. In the case of distributed photovoltaics that have not adjusted their output, the distributed photovoltaics that are closest to the current node and have not adjusted their output are selected as the updated target distributed photovoltaics; In the absence of distributed photovoltaic power generation with unadjusted output, the system enters the alarm state.

2. The multi-distributed photovoltaic power control method for a distribution station area according to claim 1, characterized in that: Also includes: When the total output of distributed photovoltaics is less than or equal to the total load of the substation, for each distributed photovoltaic, calculate the proportion of its current output to the total output of distributed photovoltaics, and increase the output of the distributed photovoltaic according to the proportion and the total load of the substation.

3. The multi-distributed photovoltaic power control method for a distribution station area according to claim 1, characterized in that: The calculating the ratio of the current output to the total output of the distributed photovoltaic system, and reducing the output of the distributed photovoltaic system according to the ratio, the total load of the area, and the minimum guaranteed output, includes: Calculate the ratio of the current output of the distributed photovoltaic system to the total output of the distributed photovoltaic system, and use the obtained ratio as the control ratio of the distributed photovoltaic system; Calculate the difference between the total output of the distributed photovoltaic system and the total load of the substation to obtain a third difference; calculate the regulated power of the distributed photovoltaic system based on the third difference and the regulation ratio; The difference between the current output of the current distributed photovoltaic system and the regulated power is calculated to obtain a fourth difference; and the current output of the current distributed photovoltaic system is adjusted to a larger value between the fourth difference and the minimum guaranteed output.

4. The multi-distributed photovoltaic power control method for a distribution station area according to claim 2, characterized in that: The calculating the ratio of the current output to the total output of the distributed photovoltaic system, and increasing the output of the distributed photovoltaic system according to the ratio and the total load of the area, includes: Calculate the ratio of the current output of the distributed photovoltaic system to the total output of the distributed photovoltaic system, and use the obtained ratio as the control ratio of the distributed photovoltaic system; Calculate the difference between the total load of the substation and the total output of the distributed photovoltaic system to obtain a fifth difference; calculate the regulated power of the distributed photovoltaic system based on the fifth difference and the regulation ratio; adjust the current output of the current distributed photovoltaic system to the sum of the regulated power and the current output of the current distributed photovoltaic system.

5. A multi-distributed photovoltaic power control device in a distribution area, characterized in that: include: Data acquisition module, minimum guaranteed output generation module, over-limit judgment module, over-limit adjustment module, power backflow judgment module and power backflow adjustment module; The data acquisition module is used to obtain the real-time voltage value of each node in the control area, the distance from each distributed photovoltaic to any node, the rated capacity of each distributed photovoltaic, the current output of each distributed photovoltaic, the power supply radius of the area and the total load of the area; The minimum guaranteed output generation module is used to calculate the minimum guaranteed output of each distributed photovoltaic according to the power supply radius of the substation, the distance from each distributed photovoltaic to the head end node of the substation, and the rated capacity of each distributed photovoltaic; The over-limit judgment module is used to compare the real-time voltage value of each node in the substation with the preset voltage upper limit to determine whether there is a node whose voltage exceeds the upper limit; The over-limit adjustment module is configured to, when there is a node whose voltage exceeds the upper limit, calculate, for each node whose voltage exceeds the upper limit, a unit adjustment value of each distributed photovoltaic system based on the minimum guaranteed output and the current output of each distributed photovoltaic system, and adjust the output of the corresponding distributed photovoltaic system in order of proximity to the node whose voltage exceeds the upper limit, from nearest to furthest, according to the unit adjustment value, until the voltage of the current node does not exceed the upper limit; The power backflow judgment module is used to calculate the sum of the current outputs of each distributed photovoltaic system when there is no node with a voltage exceeding the upper limit, to obtain the total output of the distributed photovoltaic system; and compare the total output of the distributed photovoltaic system with the total load of the substation; The power backflow adjustment module is used to calculate the ratio of the current output of each distributed photovoltaic to the total output of the distributed photovoltaic when the total output of the distributed photovoltaic is greater than the total load of the substation, and reduce the output of the distributed photovoltaic according to the ratio, the total load of the substation and the minimum guaranteed output; The calculation of the minimum guaranteed output of each distributed photovoltaic system based on the power supply radius of the substation, the distance from each distributed photovoltaic system to the head-end node of the substation, and the rated capacity of each distributed photovoltaic system includes: For each distributed photovoltaic, calculate the quotient of the distance from the photovoltaic to the head end node of the substation and the power supply radius of the substation to obtain a first value; Calculating the minimum guaranteed output of the distributed photovoltaic system based on the first value and the rated capacity of the distributed photovoltaic system; The calculating the unit adjustment value of each distributed photovoltaic system according to the minimum guaranteed output and the current output of each distributed photovoltaic system includes: For each distributed photovoltaic system, calculate the difference between its current output and the corresponding minimum guaranteed output to obtain a first difference value; Calculating a unit regulation value of the distributed photovoltaic system based on the first difference and a preset regulation unit; The step of adjusting the corresponding distributed photovoltaic outputs according to the unit adjustment value in order from near to far from the node whose voltage exceeds the upper limit until the voltage of the current node does not exceed the upper limit includes: Select the target distributed photovoltaic power plant and repeatedly adjust the output until the current node voltage does not exceed the upper limit. The starting target distributed photovoltaic power plant is the distributed photovoltaic power plant closest to the node where the current voltage exceeds the upper limit. The output adjustment operation includes: Determine whether the current output of the current target distributed photovoltaic is greater than its minimum guaranteed output, If so, the difference between its current output and its unit adjustment value is calculated to obtain a second difference; the current output of the current target distributed photovoltaic is adjusted to the larger value between the second difference and its minimum guaranteed output; the real-time voltage value of the current node is measured and compared with the preset voltage upper limit to determine whether the node voltage exceeds the upper limit; If not, determine whether there is distributed photovoltaic power generation that has not adjusted its output. In the case of distributed photovoltaics that have not adjusted their output, the distributed photovoltaics that are closest to the current node and have not adjusted their output are selected as the updated target distributed photovoltaics; In the absence of distributed photovoltaic power generation with unadjusted output, the system enters the alarm state.

6. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the multi-distributed photovoltaic power control method for a distribution station area as claimed in any one of claims 1 to 4 can be implemented.

7. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it can implement the multi-distributed photovoltaic power control method of the distribution station area as described in any one of claims 1 to 4.

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