Power distribution network voltage regulation method, apparatus, and electronic device

Abstract

The application provides a power distribution network voltage regulation method, device and electronic equipment, and belongs to the technical field of new energy consumption. The method comprises the following steps: determining the output power regulation result of all photovoltaic inverters connected to the power distribution network based on the comparison result of the current voltage measurement value of the power distribution network and the set voltage out-of-limit threshold value of the power distribution network; constructing a target function based on the output power regulation result of all photovoltaic inverters; the target function represents that the output power of all photovoltaic inverters is maximized under the condition that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold value; solving the target function, and adjusting the output power of all photovoltaic inverters based on the solving result of the target function, so that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold value. The application is used to solve the voltage out-of-limit problem caused by high-density distributed photovoltaic access to the power distribution network.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy consumption, in particular to a power distribution network voltage regulation method, a power distribution network voltage regulation device, an electronic device, a machine readable storage medium and a computer program product. BACKGROUND

[0002] Distributed photovoltaic power generation, as a new type of energy comprehensive utilization mode, has the advantages of flexible form, low management and operation cost, etc. In the case of no noise, no air and water pollution, it has significant environmental benefits. Distributed photovoltaic power generation has great significance for optimizing energy structure and achieving energy saving and emission reduction.

[0003] When small-scale distributed photovoltaic power generation is connected to the grid, its impact on the grid is minimal. However, when large-scale distributed photovoltaic power generation is connected to the grid or concentrated in a certain power supply line, area or substation, it will have a greater impact on the grid. After high-density (large amount) distributed photovoltaic power generation is connected to the distribution network, due to the large number of distributed photovoltaic power generation access locations and inconsistent distributed photovoltaic power generation access capacities, the node voltage distribution law will be more complex, and multiple node voltage increases may occur, or even a large number of node voltages may exceed the upper limit. That is, the voltage out-of-limit problem caused by high-density distributed photovoltaic power generation connected to the distribution network needs to be solved urgently. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a power distribution network voltage regulation method, device and electronic device to solve the voltage out-of-limit problem caused by high-density distributed photovoltaic power generation connected to the distribution network.

[0005] To achieve the above purpose, the embodiments of the present application provide a power distribution network voltage regulation method, comprising:

[0006] determining an output power adjustment result of all photovoltaic inverters connected to the power distribution network based on a comparison result of a current voltage measurement value of the power distribution network and a set voltage out-of-limit threshold value of the power distribution network;

[0007] constructing a target function based on the output power adjustment result of all photovoltaic inverters; the target function represents maximizing the output power of all photovoltaic inverters under the condition that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold value;

[0008] solving the target function, and adjusting the output power of all photovoltaic inverters based on the solving result of the target function to realize that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold value.

[0009] Optionally, determining the output power adjustment result of all photovoltaic inverters connected to the distribution network based on a comparison result of a current voltage measurement value of the distribution network and a set voltage over-limit threshold of the distribution network includes:

[0010] Repeat the following steps until the set stop condition is reached:

[0011] Get the current voltage measurement value of the distribution network;

[0012] When a comparison result of a current voltage measurement value of the distribution network and a set voltage over-limit threshold value of the distribution network is a first result, determining a product of a first proportional factor and a current output power of each photovoltaic inverter as an output power adjustment result of each photovoltaic inverter;

[0013] When a comparison result of a current voltage measurement value of the distribution network and a set voltage over-limit threshold value of the distribution network is a second result, determining a product of a second proportional factor and a current output power of each photovoltaic inverter as an output power adjustment result of each photovoltaic inverter;

[0014] The absolute value of the difference between the first scale factor and 1 is greater than the absolute value of the difference between the second scale factor and 1.

[0015] Optionally, the first result represents that the current voltage measurement value of the distribution network is greater than the set voltage over-limit threshold, the first proportional factor represents a first reduction proportional factor, and when the comparison result of the current voltage measurement value of the distribution network and the set voltage over-limit threshold of the distribution network is the first result, determining the product of the first proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter includes:

[0016] When the current voltage measurement value of the distribution network is greater than the set voltage over-limit threshold, determining the product of the first reduction proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter;

[0017] The second result represents that the current voltage measurement value of the distribution network is less than or equal to the set voltage over-limit threshold, the second proportional factor is represented by a first increase proportional factor, and when the comparison result of the current voltage measurement value of the distribution network and the set voltage over-limit threshold of the distribution network is the second result, determining the product of the second proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter, including:

[0018] determining, in a case that the current voltage measurement of the power distribution network is less than or equal to the set voltage out-of-limit threshold, a product of the first increasing proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter;

[0019] wherein the first decreasing proportional factor is less than 1, and the first increasing proportional factor is greater than 1.

[0020] Optionally, the determining, in a case that the current voltage measurement of the power distribution network is less than or equal to the set voltage out-of-limit threshold, a product of the first increasing proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter, comprises:

[0021] determining, in a case that the current voltage measurement of the power distribution network is less than or equal to the set voltage out-of-limit threshold and the current output power of each photovoltaic inverter is less than a set output power, a minimum value of the product of the first increasing proportional factor and the current output power of each photovoltaic inverter and the set output power as the output power adjustment result of each photovoltaic inverter.

[0022] Optionally, the method further comprises:

[0023] determining, in a case that the current voltage measurement of the power distribution network is less than or equal to the set voltage out-of-limit threshold and the current output power of each photovoltaic inverter is greater than or equal to a set output power, the set output power as the output power adjustment result of each photovoltaic inverter.

[0024] Optionally, the first result represents that the current voltage measurement of the power distribution network is less than or equal to the set voltage out-of-limit threshold, the first proportional factor represents a second increasing proportional factor, and the determining, in a case that the comparison result of the current voltage measurement of the power distribution network and the set voltage out-of-limit threshold of the power distribution network is the first result, a product of the first proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter, comprises:

[0025] determining, in a case that the current voltage measurement of the power distribution network is less than or equal to the set voltage out-of-limit threshold, a product of the second increasing proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter;

[0026] The second result represents that the current voltage measurement of the power distribution network is greater than the set voltage out-of-limit threshold, the second proportional factor represents a second reduction proportional factor, and the product of the second proportional factor and the current output power of each photovoltaic inverter is determined as the output power adjustment result of each photovoltaic inverter in the case that the comparison result of the current voltage measurement of the power distribution network and the set voltage out-of-limit threshold is the second result, comprising:

[0027] In the case that the current voltage measurement of the power distribution network is greater than the set voltage out-of-limit threshold, the product of the second reduction proportional factor and the current output power of each photovoltaic inverter is determined as the output power adjustment result of each photovoltaic inverter.

[0028] The second increase proportional factor is greater than 1, the second reduction proportional factor is less than 1, and the second increase proportional factor is greater than the first increase proportional factor, and the second reduction proportional factor is greater than the first reduction proportional factor.

[0029] Optionally, the target function is represented by the following formula:

[0030] ;

[0031] The set of all photovoltaic inverters connected to the power distribution network is represented by P, and the output power of the i th photovoltaic inverter is represented by P i.

[0032] In another aspect, the embodiment of the present application also provides a power distribution network voltage adjustment device, comprising:

[0033] A comparison module is configured to determine the output power adjustment result of all photovoltaic inverters connected to the power distribution network based on the comparison result of the current voltage measurement of the power distribution network and the set voltage out-of-limit threshold.

[0034] A construction module is configured to construct a target function based on the output power adjustment result of all photovoltaic inverters, and the target function represents that the output power of all photovoltaic inverters is maximized in the case that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold.

[0035] A solution module is configured to solve the target function, and the output power of all photovoltaic inverters is adjusted based on the solution result of the target function to realize that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold.

[0036] Optionally, the output power adjustment result of all photovoltaic inverters connected to the power distribution network is determined based on the comparison result of the current voltage measurement of the power distribution network and the set voltage out-of-limit threshold, comprising: ​​

[0037] repeating the following steps until a set stop condition is reached:

[0038] obtaining a current voltage measurement of the power distribution network;

[0039] in a case where a comparison result of the current voltage measurement of the power distribution network and a set voltage out-of-limit threshold of the power distribution network is a first result, determining a product of a first proportional factor and a current output power of each photovoltaic inverter as an output power adjustment result of each photovoltaic inverter;

[0040] in a case where the comparison result of the current voltage measurement of the power distribution network and the set voltage out-of-limit threshold of the power distribution network is a second result, determining a product of a second proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter;

[0041] wherein an absolute value of a difference between the first proportional factor and 1 is greater than an absolute value of a difference between the second proportional factor and 1.

[0042] In another aspect, the present application also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the power distribution network voltage adjustment method when executing the program.

[0043] In another aspect, the present application also provides a machine readable storage medium, having a computer program stored thereon, wherein the computer program is executable on a processor to implement the power distribution network voltage adjustment method.

[0044] In another aspect, the present application also provides a computer program product, comprising a computer program, wherein the computer program is executable on a processor to implement the power distribution network voltage adjustment method.

[0045] Through the above technical solution, the embodiment of the present application determines the output power adjustment result of all photovoltaic inverters connected to the power distribution network based on a comparison result of a current voltage measurement of the power distribution network and a set voltage out-of-limit threshold of the power distribution network, constructs a target function based on the output power adjustment result of all photovoltaic inverters, and finally solves the target function to maximize the output power of all photovoltaic inverters under the condition that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold. The embodiment of the present application solves the voltage out-of-limit problem caused by high-density distributed photovoltaic access to the power distribution network.

[0046] Other features and advantages of the embodiment of the present application will be described in detail in the following specific implementation part. BRIEF DESCRIPTION OF DRAWINGS

[0047] The accompanying drawings are included to provide a further understanding of embodiments of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application, and together with the description serve to explain embodiments of the application, but are not intended to limit the present application in any manner. In the drawings:

[0048] Figure 1 is one of flow schematic diagrams of the power distribution network voltage regulation method provided by the present application;

[0049] Figure 2 is another one of flow schematic diagrams of the power distribution network voltage regulation method provided by the present application;

[0050] Figure 3 is a structural schematic diagram of the power distribution network voltage regulation device provided by the present application;

[0051] Figure 4 is a structural schematic diagram of the electronic device provided by the present application. DETAILED DESCRIPTION

[0052] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0053] High-density photovoltaic grid connection will have an impact on power flow, node voltage, relay protection and power quality of the power distribution network. And the excessively high penetration rate, unreasonable grid connection location and unreasonable grid connection capacity of the distributed photovoltaic will cause a series of adverse effects on the power distribution network, and even the feeder voltage out-of-limit threatens the stable operation of the power distribution network.

[0054] In view of this, the purpose of the embodiments of the present application is to provide a power distribution network voltage regulation method, device and electronic device, to solve the voltage out-of-limit problem caused by high-density distributed photovoltaic access to the power distribution network.

[0055] Method embodiments

[0056] Please refer to Figure 1 The embodiments of the present application provide a power distribution network voltage regulation method, comprising:

[0057] Step 100, based on the comparison result of the current voltage measurement value of the power distribution network and the set voltage out-of-limit threshold value of the power distribution network, determine the output power regulation result of all photovoltaic inverters accessed to the power distribution network.

[0058] The electronic device can repeatedly acquire the current voltage measurement value of the power distribution network within a certain detection period (for example, the detection period is one hour, and the interval between two adjacent detection periods is 5 minutes), repeatedly compare the current voltage measurement value of the power distribution network with the set voltage out-of-limit threshold of the power distribution network, and determine the output power adjustment result of all photovoltaic inverters connected to the power distribution network based on the comparison result. For example, in the case that the current voltage measurement value of the power distribution network is greater than the set voltage out-of-limit threshold, it indicates that there is voltage out-of-limit caused by high-density distributed photovoltaic access to the power distribution network at this time, and therefore the output power of all photovoltaic inverters can be reduced and controlled through a unified control instruction based on the idea of group control. Specifically, the product of the current output power of each photovoltaic inverter and a reduction factor (for example, 0.95) can be determined as the latest output power of each photovoltaic inverter. In the case that the current voltage measurement value of the power distribution network is less than or equal to the set voltage out-of-limit threshold, it indicates that voltage out-of-limit caused by high-density distributed photovoltaic access to the power distribution network has not yet occurred at this time, and therefore the output power of photovoltaic inverters can be appropriately increased and controlled through a unified control instruction. Specifically, the product of the current output power of each photovoltaic inverter and an increase factor (for example, 1.05) can be determined as the latest output power of each photovoltaic inverter.

[0059] The present application adopts the idea of group control, first sets a set voltage out-of-limit threshold for the power distribution network voltage (referred to as power distribution network voltage), and when it is detected that the power distribution network voltage exceeds the set voltage out-of-limit threshold, the output power of all photovoltaic inverters is controlled through a unified control instruction, the coordination of the whole system range of distributed photovoltaic is realized, and the global optimization of the power distribution network voltage is realized.

[0060] It should be noted that the output power of the photovoltaic inverter in the embodiment of the present application refers to the active power of the photovoltaic inverter. The embodiment of the present application does not consider the reactive power of the photovoltaic inverter.

[0061] Step 200, constructing a target function based on the output power adjustment result of all photovoltaic inverters.

[0062] The electronic device constructs a target function based on the output power adjustment result of all photovoltaic inverters at each time obtained in step 100. The target function represents maximizing the output power of all photovoltaic inverters under the condition that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold.

[0063] In one embodiment, the target function can be represented by the following formula:

[0064] ;

[0065] wherein, a set of all photovoltaic inverters accessing the power distribution network, output power of the i-th photovoltaic inverter.

[0066] In addition, constraints can be set for the above objective function, for example, the constraints can include voltage safety constraints, photovoltaic inverter capacity constraints, power balance constraints, etc.

[0067] In one embodiment, the voltage safety constraints represent that the voltage amplitudes of all nodes of the power distribution network need to be within the allowed range:

[0068] ;

[0069] wherein is a set of all nodes of the power distribution network, is the voltage amplitude of node , and are the lower and upper limits of the node voltage, respectively.

[0070] In one embodiment, the photovoltaic inverter capacity constraints represent that the output power of the photovoltaic inverter is limited by its rated capacity:

[0071] ;

[0072] wherein is the maximum active capacity of the photovoltaic inverter at node , is a set of all nodes of the power distribution network, is the output power of the photovoltaic inverter at node , and here the reactive power regulation is not considered, so there is no reactive power output constraint.

[0073] In one embodiment, the power balance constraints are constructed based on the node power balance of the flow equation:

[0074] ;

[0075] wherein, is the output power of the photovoltaic inverter at node , P i LOAD is the load consumption power at node i, V i and V j are the voltage amplitudes of nodes i and j, respectively, and are the line conductance and susceptance, is the difference in phase angle of the node voltage.

[0076] Step 300, solving the objective function, adjusting the output power of all photovoltaic inverters based on the solving result of the objective function to realize that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold.

[0077] The electronic device can solve the objective function by various optimization methods (genetic algorithm, particle swarm algorithm, simulated annealing algorithm, etc.) to obtain the maximum output power of all photovoltaic inverters under the condition that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold, and adjust the output power of all photovoltaic inverters based on the maximum output power of all photovoltaic inverters to realize that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold.

[0078] The electronic device first determines the output power adjustment result of all photovoltaic inverters connected to the power distribution network based on the comparison result of the current voltage measurement value of the power distribution network and the set voltage out-of-limit threshold of the power distribution network, and realizes that the output power of all photovoltaic inverters connected to the power distribution network is adjusted to fully consider the network structure and load level of the power distribution network when the distributed photovoltaic is connected to the power distribution network. Then, the objective function is constructed based on the output power adjustment result of all photovoltaic inverters to maximize the output power of all photovoltaic inverters under the condition that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold, so as to realize that the access amount of the distributed photovoltaic is improved as much as possible through a reasonable control strategy on the basis of reasonably analyzing the access level of the distributed photovoltaic to the power distribution network, and the distributed photovoltaic is reasonably and orderly connected, and the voltage fluctuation level of the power distribution network is improved.

[0079] The embodiment of the application determines the output power adjustment result of all photovoltaic inverters connected to the power distribution network based on the comparison result of the current voltage measurement value of the power distribution network and the set voltage out-of-limit threshold of the power distribution network, and then constructs the objective function based on the output power adjustment result of all photovoltaic inverters, and finally solves the objective function to maximize the output power of all photovoltaic inverters under the condition that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold. The embodiment of the application realizes the solution to the voltage out-of-limit problem caused by high-density distributed photovoltaic connected to the power distribution network.

[0080] In other aspects of the embodiment of the application, step 100, determining the output power adjustment result of all photovoltaic inverters connected to the power distribution network based on the comparison result of the current voltage measurement value of the power distribution network and the set voltage out-of-limit threshold of the power distribution network, comprises:

[0081] The following steps are repeatedly executed until a set stop condition is reached:

[0082] Step 110, obtaining the current voltage measurement value of the power distribution network;

[0083] Step 120, in the case that the comparison result of the current voltage measurement value of the power distribution network and the set voltage out-of-limit threshold value of the power distribution network is a first result, determining the product of a first proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter;

[0084] Step 130, in the case that the comparison result of the current voltage measurement value of the power distribution network and the set voltage out-of-limit threshold value of the power distribution network is a second result, determining the product of a second proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter; wherein the absolute value of the difference between the first proportional factor and 1 is greater than the absolute value of the difference between the second proportional factor and 1.

[0085] The embodiment of the present application adopts the idea of group regulation and group control, and based on the comparison result of the current voltage measurement value of the power distribution network and the set voltage out-of-limit threshold value of the power distribution network, the output power of all photovoltaic inverters is regulated by a unified regulation instruction, which is first coarsely regulated and then finely regulated, i.e., first using a first proportional factor to regulate the output power of the photovoltaic inverter and then using a second proportional factor to regulate the output power of the photovoltaic inverter, so that the current voltage measurement value of the power distribution network gradually approaches the set voltage out-of-limit threshold value of the power distribution network.

[0086] For example, in one embodiment, the first result represents that the current voltage measurement value of the power distribution network is greater than the set voltage out-of-limit threshold value, and the first proportional factor represents a first reduction proportional factor. Step 120, in the case that the comparison result of the current voltage measurement value of the power distribution network and the set voltage out-of-limit threshold value of the power distribution network is a first result, determining the product of a first proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter, comprising: in the case that the current voltage measurement value of the power distribution network is greater than the set voltage out-of-limit threshold value, determining the product of the first reduction proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter;

[0087] The second result indicates that the current voltage measurement value of the distribution network is less than or equal to the set voltage over-limit threshold, and the second proportional factor is characterized as a first increase proportional factor. Step 130: When the comparison result of the current voltage measurement value of the distribution network and the set voltage over-limit threshold of the distribution network is the second result, determine the product of the second proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter, including: when the current voltage measurement value of the distribution network is less than or equal to the set voltage over-limit threshold, determine the product of the first increase proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter; wherein the first decrease proportional factor is less than 1, and the first increase proportional factor is greater than 1.

[0088] In an embodiment of the present invention, a set voltage over-limit threshold is first set for the distribution network voltage. When the distribution network line voltage is detected to have exceeded the over-limit threshold, the output of all photovoltaic inverters is regulated through a unified control instruction, first with coarse adjustment and then with fine adjustment, so that the current voltage measurement value of the distribution network gradually approaches the set voltage over-limit threshold. Based on the idea of ​​coarse adjustment followed by fine adjustment, the absolute value of the difference between the first reduction scale factor and 1 can be set to be greater than the absolute value of the difference between the second scale factor and 1. For example, in one embodiment, the first reduction scale factor can be set to 0.9, and the first increase scale factor can be set to 1.01.

[0089] For example, the variables may be defined as follows: : Current voltage measurement value of the distribution network; : Set the voltage over-limit threshold; : Current output power of the photovoltaic inverter; : first reduction scale factor; : First rise scaling factor.

[0090] First, when the current voltage measurement value of the distribution network is greater than the set voltage over-limit threshold, the product of the first reduction proportional factor and the current output power of each photovoltaic inverter is determined as the output power adjustment result of each photovoltaic inverter. That is, , then the output power regulation result of each photovoltaic inverter is ;

[0091] Here we first reduce the scale factor Take 0.9, that is, each adjustment reduces the output power of each photovoltaic inverter by 10%. This step will be repeated, and each time the current output power of each photovoltaic inverter is multiplied by the first reduction proportional factor. , until the current voltage measurement value of the distribution network is less than or equal to the set voltage over-limit threshold.

[0092] In the case that the current voltage measurement of the power distribution network is less than or equal to the set voltage out-of-limit threshold, the product of the first increase proportion factor and the current output power of each photovoltaic inverter is determined as the output power adjustment result of each photovoltaic inverter. That is, if , then .

[0093] Here, the first increase proportion factor is 1.01, and in the case that the current voltage measurement of the power distribution network is adjusted to be less than or equal to the set voltage out-of-limit threshold, each adjustment causes the output power of each photovoltaic inverter to increase by 1%. This step is repeatedly performed, each time multiplying the current output power of each photovoltaic inverter by the first increase proportion factor , until the current voltage measurement of the power distribution network exceeds the set voltage out-of-limit threshold again.

[0094] It should be noted that the set stop condition for the repeated execution of steps 110 to 130 can be reaching a set time threshold, i.e., the end of a detection period. When the set stop condition is reached, the electronic device can obtain the output power adjustment result of each photovoltaic inverter whose voltage of the power distribution network does not exceed the set voltage out-of-limit threshold at each time.

[0095] The regulation method combining the above coarse adjustment and fine adjustment in two layers of dimensions makes the power distribution voltage gradually approach the set voltage out-of-limit threshold, on the one hand, as much as possible to increase the output power (active power) of the photovoltaic inverter, and on the other hand, effectively solves the voltage out-of-limit problem of high-density distributed photovoltaic access to the power distribution network, and guarantees the stable and safe operation of the power distribution network.

[0096] In other aspects of the present application, step 130, in the case that the current voltage measurement of the power distribution network is less than or equal to the set voltage out-of-limit threshold, the product of the first increase proportion factor and the current output power of each photovoltaic inverter is determined as the output power adjustment result of each photovoltaic inverter, comprises: in the case that the current voltage measurement of the power distribution network is less than or equal to the set voltage out-of-limit threshold, and the current output power of each photovoltaic inverter is less than a set output power, the minimum of the product of the first increase proportion factor and the current output power of each photovoltaic inverter and the set output power is determined as the output power adjustment result of each photovoltaic inverter.

[0097] The electronic device redefines a variable : the set output power of the photovoltaic inverter (which can be the initial output power or the rated output power of the photovoltaic inverter). In another embodiment, when the current voltage measurement of the power distribution network is less than or equal to the set voltage excursion threshold value, and the current output power of each photovoltaic inverter is less than the set output power, the minimum value between the product of the first increase factor and the current output power of each photovoltaic inverter and the set output power is determined as the output power adjustment result of each photovoltaic inverter. That is, if , and , then .

[0098] Similarly, the first increase factor is 1.01, and the minimum value between the product of the first increase factor and the current output power of each photovoltaic inverter and the set output power is determined as the output power adjustment result of each photovoltaic inverter, so as to ensure that the current output power of each photovoltaic inverter does not exceed the set output power . This process is repeated each time the current output power of the photovoltaic inverter is multiplied by the first increase factor , until the current output power of the photovoltaic inverter returns to or the current voltage measurement of the power distribution network exceeds the set voltage excursion threshold value again.

[0099] In addition, when the current voltage measurement of the power distribution network is less than or equal to the set voltage excursion threshold value, and the current output power of each photovoltaic inverter is greater than or equal to the set output power, the electronic device determines the set output power as the output power adjustment result of each photovoltaic inverter. This ensures that the current output power of each photovoltaic inverter does not exceed the set output power of each photovoltaic inverter, so that the embodiment of the present application ensures the stable and safe operation of the power distribution network while maximizing the output power of the photovoltaic inverter.

[0100] The embodiment of the present application uses the above-mentioned coarse adjustment and fine adjustment dual-dimension combination adjustment method, comprehensively considers the set output power of the photovoltaic inverter, gradually approaches the voltage excursion threshold value of the power distribution line, further improves the output power of the photovoltaic inverter, further effectively solves the voltage excursion problem of high-density distributed photovoltaic access to the power distribution network, and further ensures the stable and safe operation of the power distribution network.

[0101] In other aspects of the embodiments of the present invention, the first result indicates that the current voltage measurement value of the distribution network is less than or equal to the set voltage over-limit threshold, and the first proportional factor is characterized as a second increase proportional factor. Step 120: When the comparison result of the current voltage measurement value of the distribution network and the set voltage over-limit threshold of the distribution network is the first result, determine the product of the first proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter, including: when the current voltage measurement value of the distribution network is less than or equal to the set voltage over-limit threshold, determine the product of the second increase proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter.

[0102] The second result indicates that the current voltage measurement value of the distribution network is greater than the set voltage over-limit threshold, and the second proportional factor is characterized as a second reduction proportional factor. Step 130: If the comparison result of the current voltage measurement value of the distribution network and the set voltage over-limit threshold of the distribution network is the second result, determine the product of the second proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter, including: if the current voltage measurement value of the distribution network is greater than the set voltage over-limit threshold, determine the product of the second reduction proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter. Wherein, the second increase proportional factor is greater than 1, the second decrease proportional factor is less than 1, the second increase proportional factor is greater than the first increase proportional factor, and the second decrease proportional factor is greater than the first decrease proportional factor.

[0103] First, when the current voltage measurement value of the distribution network is less than or equal to the set voltage over-limit threshold, the product of the second increase proportional factor and the current output power of each photovoltaic inverter is determined as the output power adjustment result of each photovoltaic inverter. That is, , then the output power regulation result of each photovoltaic inverter is ;

[0104] Here the second increase scale factor k up ' can be taken as 1.1, that is, each adjustment makes the output power of each photovoltaic inverter increase by 10%. This step will be repeated, each time the current output power of each photovoltaic inverter is multiplied by the second increase proportional factor k up ', until the current voltage measurement value of the distribution network is greater than the set voltage over-limit threshold.

[0105] In the case that the current voltage measurement of the distribution network is greater than the set voltage out-of-limit threshold, the product of the second reduction proportion factor and the current output power of each photovoltaic inverter is determined as the output power adjustment result of each photovoltaic inverter. That is, if , then .

[0106] Here, the second reduction proportion factor k down is 0.99, and in the case that the current voltage measurement of the distribution network is adjusted to be less than or equal to the set voltage out-of-limit threshold, the output power of each photovoltaic inverter is reduced by 1% each time. This step is repeatedly performed, and each time the current output power of each photovoltaic inverter is multiplied by the second reduction proportion factor k down , until the current voltage measurement of the distribution network is less than or equal to the set voltage out-of-limit threshold.

[0107] The regulation method combining the above coarse adjustment and fine adjustment in two layers of dimensions makes the distribution voltage gradually approach the set voltage out-of-limit threshold, on the one hand, improves the output power (active power) of the photovoltaic inverter as much as possible, and on the other hand, effectively solves the voltage out-of-limit problem of high-density distributed photovoltaic access to the distribution network, and guarantees the stable and safe operation of the distribution network.

[0108] In an exemplary embodiment, the variables can be defined as follows: : the current voltage measurement of the distribution network; : the set voltage out-of-limit threshold; : the current output power of the photovoltaic inverter; : the first reduction proportion factor; : the first increase proportion factor; : the set output power of the photovoltaic inverter (which can be the initial output power or the rated output power of the photovoltaic inverter).

[0109] Please refer to Figure 2 , the flow of the distribution network voltage regulation method under high-density distributed photovoltaic access proposed by the embodiment of the present application is as follows:

[0110] Step 1: initialize the current output power of the photovoltaic inverter .

[0111] Step 2: measure the current voltage measurement of the distribution network in real time .

[0112] Step 3: when , update to , and return to step 2;

[0113] Step 4: when When , if is updated to , return to step 2; otherwise, keep , return to step 2.

[0114] The embodiment of the application first sets a set voltage out-of-limit threshold, and gradually approaches the set voltage out-of-limit threshold by the regulation and control method combining coarse adjustment and fine adjustment, thereby effectively solving the voltage out-of-limit problem of the power distribution network with high-density distributed photovoltaic access. The embodiment of the application further constructs a power distribution network voltage optimization control model with the maximum output power of the photovoltaic inverter as the target when the voltage does not exceed the set voltage out-of-limit threshold, and regulates and controls the output power of the grid-connected photovoltaic inverter with voltage out-of-limit, thereby ensuring the stable and safe operation of the power distribution network.

[0115] In summary, the power distribution network voltage regulation method of the embodiment of the application has the following advantages:

[0116] 1. The embodiment of the application adopts the idea of group regulation and group control, regulates and controls the output power of all photovoltaic inverters through unified regulation and control instructions, and gradually approaches the set voltage out-of-limit threshold by the regulation and control combining coarse adjustment and fine adjustment, thereby effectively solving the voltage out-of-limit problem of the power distribution network with high-density distributed photovoltaic access.

[0117] 2. The embodiment of the application constructs a power distribution network voltage optimization control model (or target function) with the maximum output power of the photovoltaic inverter as the target when the voltage does not exceed the set voltage out-of-limit threshold, thereby improving the access amount of distributed photovoltaic as much as possible, ensuring the reasonable and orderly access of distributed photovoltaic, and improving the voltage fluctuation level of the power distribution network.

[0118] Device embodiment

[0119] Please refer to Figure 3 On the other hand, the embodiment of the application further provides a power distribution network voltage regulation device, which comprises:

[0120] A comparison module 301 is configured to determine an output power regulation result of all photovoltaic inverters connected to the power distribution network based on a comparison result of a current voltage measurement value of the power distribution network and a set voltage out-of-limit threshold of the power distribution network.

[0121] A construction module 302 is configured to construct a target function based on the output power regulation result of all photovoltaic inverters; the target function represents the maximization of the output power of all photovoltaic inverters under the condition that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold.

[0122] The solving module 303 is configured to solve the target function, and adjust the output power of all photovoltaic inverters based on a result of solving the target function, so as to realize that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold.

[0123] Optionally, the comparison result of the current voltage measurement value of the power distribution network and the set voltage out-of-limit threshold of the power distribution network is used to determine the output power adjustment result of all photovoltaic inverters connected to the power distribution network, and the method comprises the following steps.

[0124] The following steps are repeatedly performed until a set stop condition is reached:

[0125] Obtaining a current voltage measurement value of the power distribution network;

[0126] In a case where the comparison result of the current voltage measurement value of the power distribution network and the set voltage out-of-limit threshold of the power distribution network is a first result, a product of a first proportional factor and a current output power of each photovoltaic inverter is determined as the output power adjustment result of each photovoltaic inverter;

[0127] In a case where the comparison result of the current voltage measurement value of the power distribution network and the set voltage out-of-limit threshold of the power distribution network is a second result, a product of a second proportional factor and the current output power of each photovoltaic inverter is determined as the output power adjustment result of each photovoltaic inverter;

[0128] The absolute value of the difference between the first proportional factor and 1 is greater than the absolute value of the difference between the second proportional factor and 1.

[0129] Optionally, the first result represents that the current voltage measurement value of the power distribution network is greater than the set voltage out-of-limit threshold, the first proportional factor represents a first reduction proportional factor, and in the case where the comparison result of the current voltage measurement value of the power distribution network and the set voltage out-of-limit threshold of the power distribution network is the first result, the product of the first proportional factor and the current output power of each photovoltaic inverter is determined as the output power adjustment result of each photovoltaic inverter.

[0130] In a case where the current voltage measurement value of the power distribution network is greater than the set voltage out-of-limit threshold, the product of the first reduction proportional factor and the current output power of each photovoltaic inverter is determined as the output power adjustment result of each photovoltaic inverter.

[0131] The second result represents that the current voltage measurement of the power distribution network is less than or equal to the set voltage out-of-limit threshold, the second proportional factor represents a first increasing proportional factor, and the product of the second proportional factor and the current output power of each photovoltaic inverter is determined as the output power adjustment result of each photovoltaic inverter in the case that the comparison result of the current voltage measurement of the power distribution network and the set voltage out-of-limit threshold of the power distribution network is the second result, comprising:

[0132] In the case that the current voltage measurement of the power distribution network is less than or equal to the set voltage out-of-limit threshold, the product of the first increasing proportional factor and the current output power of each photovoltaic inverter is determined as the output power adjustment result of each photovoltaic inverter.

[0133] The first decreasing proportional factor is less than 1, and the first increasing proportional factor is greater than 1.

[0134] Optionally, the product of the first increasing proportional factor and the current output power of each photovoltaic inverter is determined as the output power adjustment result of each photovoltaic inverter in the case that the current voltage measurement of the power distribution network is less than or equal to the set voltage out-of-limit threshold, comprising:

[0135] In the case that the current voltage measurement of the power distribution network is less than or equal to the set voltage out-of-limit threshold and the current output power of each photovoltaic inverter is less than a set output power, the minimum value of the product of the first increasing proportional factor and the current output power of each photovoltaic inverter and the set output power is determined as the output power adjustment result of each photovoltaic inverter.

[0136] Optionally, the device further comprises:

[0137] The determination module is configured to determine the set output power as the output power adjustment result of each photovoltaic inverter in the case that the current voltage measurement of the power distribution network is less than or equal to the set voltage out-of-limit threshold and the current output power of each photovoltaic inverter is greater than or equal to the set output power.

[0138] The first result represents that the current voltage measurement of the power distribution network is less than or equal to the set voltage out-of-limit threshold, the first proportional factor represents a second increasing proportional factor, and the product of the first proportional factor and the current output power of each photovoltaic inverter is determined as the output power adjustment result of each photovoltaic inverter in the case that the comparison result of the current voltage measurement of the power distribution network and the set voltage out-of-limit threshold of the power distribution network is the first result, comprising:

[0139] determining, in a case that the current voltage measurement of the power distribution network is less than or equal to the set voltage out-of-limit threshold, a product of the second increasing proportional factor and the current output power of each photovoltaic inverter as an output power adjustment result of each photovoltaic inverter;

[0140] The second result represents that the current voltage measurement of the power distribution network is greater than the set voltage out-of-limit threshold, the second proportional factor is represented as a second decreasing proportional factor, and the determining the product of the second proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter in a case that the comparison result of the current voltage measurement of the power distribution network and the set voltage out-of-limit threshold of the power distribution network is the second result includes:

[0141] determining, in a case that the current voltage measurement of the power distribution network is greater than the set voltage out-of-limit threshold, a product of the second decreasing proportional factor and the current output power of each photovoltaic inverter as an output power adjustment result of each photovoltaic inverter;

[0142] The second increasing proportional factor is greater than 1, the second decreasing proportional factor is less than 1, and the second increasing proportional factor is greater than the first increasing proportional factor, and the second decreasing proportional factor is greater than the first decreasing proportional factor.

[0143] Optionally, the objective function is represented by the following formula:

[0144] ;

[0145] wherein, is a set of all photovoltaic inverters accessing the power distribution network, is an output power of the i th photovoltaic inverter.

[0146] The power distribution network voltage regulation device includes a processor and a memory, and the above-mentioned comparison module 301, construction module 302 and solving module 303 and the like are stored in the memory as program units, and the corresponding functions are realized by the processor executing the above-mentioned program units stored in the memory.

[0147] The processor contains a core, and the corresponding program units are called from the memory by the core. The core can be provided with one or more than one.

[0148] The memory can include a non-permanent memory in a computer readable medium, a random access memory (RAM) and / or a non-volatile memory such as a read-only memory (ROM) or a flash memory (flash RAM), and the memory includes at least one memory chip.

[0149] Figure 4 An example of an electronic device is shown in the schematic diagram of the physical structure, such asFigure 4 As shown, the electronic device can include a processor 410, a communications interface 420, a memory 430, and a communications bus 440, wherein the processor 410, the communications interface 420, and the memory 430 complete mutual communication through the communications bus 440. The processor 410 can invoke a logical instruction in the memory 430 to execute a power distribution network voltage regulation method, which includes: determining an output power regulation result of all photovoltaic inverters connected to the power distribution network based on a comparison result of a current voltage measurement value of the power distribution network and a set voltage out-of-limit threshold value of the power distribution network; constructing a target function based on the output power regulation result of the all photovoltaic inverters; the target function represents maximizing the output power of all photovoltaic inverters in the case that the power distribution network voltage does not exceed the set voltage out-of-limit threshold value; solving the target function, and adjusting the output power of all photovoltaic inverters based on a solving result of the target function to achieve that the power distribution network voltage does not exceed the set voltage out-of-limit threshold value.

[0150] In addition, the logical instruction in the memory 430 described above can be implemented in the form of a software functional unit and sold or used as an independent product, which can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

[0151] In another aspect, the present application also provides a computer program product comprising a computer program, which can be stored on a machine readable storage medium, and the computer program can be executed by a processor to enable a computer to perform a power distribution network voltage regulation method, which comprises: determining output power regulation results of all photovoltaic inverters connected to the power distribution network based on a comparison result of a current voltage measurement value of the power distribution network and a set voltage out-of-limit threshold value of the power distribution network; constructing a target function based on the output power regulation results of the all photovoltaic inverters; the target function representing that the output power of all photovoltaic inverters is maximized under the condition that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold value; solving the target function, and regulating the output power of all photovoltaic inverters based on a solution result of the target function to achieve that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold value.

[0152] In another aspect, the present application also provides a machine readable storage medium, which stores a computer program, and the computer program can be executed by a processor to implement a power distribution network voltage regulation method, which comprises: determining output power regulation results of all photovoltaic inverters connected to the power distribution network based on a comparison result of a current voltage measurement value of the power distribution network and a set voltage out-of-limit threshold value of the power distribution network; constructing a target function based on the output power regulation results of the all photovoltaic inverters; the target function representing that the output power of all photovoltaic inverters is maximized under the condition that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold value; solving the target function, and regulating the output power of all photovoltaic inverters based on a solution result of the target function to achieve that the voltage of the power distribution network does not exceed the set voltage out-of-limit threshold value.

[0153] The apparatus embodiments described above are merely illustrative, wherein the units shown as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the present embodiment scheme. Those skilled in the art can understand and implement it without creative labor.

[0154] Those skilled in the art can clearly understand the technical solutions of the various embodiments from the above description of the embodiments, and the various embodiments can be implemented by means of software with the necessary general hardware platforms, and of course, can also be implemented by hardware. Based on such understanding, the above technical solutions, essentially or in other words, the part of the prior art that makes a contribution, can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, and the like, and includes a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in the various embodiments or some parts of the embodiments.

[0155] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for regulating voltage in a distribution network, characterized in that: include: Determining an output power adjustment result for all photovoltaic inverters connected to the distribution network based on a comparison result of a current voltage measurement value of the distribution network and a set voltage over-limit threshold of the distribution network; Constructing an objective function based on the output power regulation results of all the photovoltaic inverters; The objective function represents maximizing the output power of all photovoltaic inverters when the distribution network voltage does not exceed the set voltage over-limit threshold; Solving the objective function, and adjusting the output power of all photovoltaic inverters based on the solution of the objective function to ensure that the distribution network voltage does not exceed the set voltage over-limit threshold; The step of determining the output power adjustment result of all photovoltaic inverters connected to the distribution network based on a comparison result of a current voltage measurement value of the distribution network and a set voltage over-limit threshold of the distribution network includes: Repeat the following steps until the set stop condition is reached: Get the current voltage measurement value of the distribution network; When a comparison result of a current voltage measurement value of the distribution network and a set voltage over-limit threshold value of the distribution network is a first result, determining a product of a first proportional factor and a current output power of each photovoltaic inverter as an output power adjustment result of each photovoltaic inverter; When a comparison result of a current voltage measurement value of the distribution network and a set voltage over-limit threshold value of the distribution network is a second result, determining a product of a second proportional factor and a current output power of each photovoltaic inverter as an output power adjustment result of each photovoltaic inverter; The absolute value of the difference between the first scale factor and 1 is greater than the absolute value of the difference between the second scale factor and 1.

2. The method for regulating voltage in a distribution network according to claim 1, wherein: The first result represents that the current voltage measurement value of the distribution network is greater than the set voltage over-limit threshold, the first proportional factor represents a first reduction proportional factor, and when the comparison result of the current voltage measurement value of the distribution network and the set voltage over-limit threshold of the distribution network is the first result, determining the product of the first proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter, including: When the current voltage measurement value of the distribution network is greater than the set voltage over-limit threshold, determining the product of the first reduction proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter; The second result represents that the current voltage measurement value of the distribution network is less than or equal to the set voltage over-limit threshold, the second proportional factor is represented by a first increase proportional factor, and when the comparison result of the current voltage measurement value of the distribution network and the set voltage over-limit threshold of the distribution network is the second result, determining the product of the second proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter, including: When the current voltage measurement value of the distribution network is less than or equal to the set voltage over-limit threshold, determining a product of a first increase proportional factor and a current output power of each photovoltaic inverter as an output power adjustment result of each photovoltaic inverter; The first reduction scale factor is less than 1, and the first increase scale factor is greater than 1.

3. The distribution network voltage regulation method according to claim 2, characterized in that: The method further comprises determining, when the current voltage measurement value of the distribution network is less than or equal to the set voltage over-limit threshold, a product of a first increase proportional factor and a current output power of each photovoltaic inverter as an output power adjustment result of each photovoltaic inverter, including: When the current voltage measurement value of the distribution network is less than or equal to the set voltage over-limit threshold and the current output power of each photovoltaic inverter is less than the set output power, the minimum value of the product of the first increase proportional factor and the current output power of each photovoltaic inverter and the set output power is determined as the output power adjustment result of each photovoltaic inverter.

4. The method for regulating voltage in a distribution network according to claim 3, wherein: The method further comprises: When the current voltage measurement value of the distribution network is less than or equal to the set voltage over-limit threshold and the current output power of each photovoltaic inverter is greater than or equal to the set output power, the set output power is determined as the output power adjustment result of each photovoltaic inverter.

5. The method for regulating voltage in a distribution network according to claim 2, wherein: The first result represents that the current voltage measurement value of the distribution network is less than or equal to the set voltage over-limit threshold, the first proportional factor represents a second increase proportional factor, and when the comparison result of the current voltage measurement value of the distribution network and the set voltage over-limit threshold of the distribution network is the first result, determining the product of the first proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter, including: When the current voltage measurement value of the distribution network is less than or equal to the set voltage over-limit threshold, determine the product of the second increase proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter; The second result represents that the current voltage measurement value of the distribution network is greater than the set voltage over-limit threshold, the second proportional factor represents a second reduction proportional factor, and when the comparison result of the current voltage measurement value of the distribution network and the set voltage over-limit threshold of the distribution network is the second result, determining the product of the second proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter, including: When the current voltage measurement value of the distribution network is greater than the set voltage over-limit threshold, determining the product of the second reduction proportional factor and the current output power of each photovoltaic inverter as the output power adjustment result of each photovoltaic inverter; The second increase scale factor is greater than 1, the second decrease scale factor is less than 1, the second increase scale factor is greater than the first increase scale factor, and the second decrease scale factor is greater than the first decrease scale factor.

6. The method for regulating voltage in a distribution network according to claim 1, wherein: The objective function is expressed by the following formula: ； in, is the set of all photovoltaic inverters connected to the distribution network, is the output power of the i-th photovoltaic inverter.

7. A distribution network voltage regulating device, characterized in that: include: a comparison module, configured to determine an output power adjustment result for all photovoltaic inverters connected to the distribution network based on a comparison result of a current voltage measurement value of the distribution network and a set voltage over-limit threshold of the distribution network; A construction module, configured to construct an objective function based on the output power regulation results of all photovoltaic inverters; The objective function represents maximizing the output power of all photovoltaic inverters when the distribution network voltage does not exceed the set voltage over-limit threshold; A solution module, configured to solve the objective function and adjust the output power of all photovoltaic inverters based on the solution result of the objective function so as to ensure that the distribution network voltage does not exceed the set voltage over-limit threshold; The step of determining the output power adjustment result of all photovoltaic inverters connected to the distribution network based on a comparison result of a current voltage measurement value of the distribution network and a set voltage over-limit threshold of the distribution network includes: Repeat the following steps until the set stop condition is reached: Get the current voltage measurement value of the distribution network; When a comparison result of a current voltage measurement value of the distribution network and a set voltage over-limit threshold value of the distribution network is a first result, determining a product of a first proportional factor and a current output power of each photovoltaic inverter as an output power adjustment result of each photovoltaic inverter; When a comparison result of a current voltage measurement value of the distribution network and a set voltage over-limit threshold value of the distribution network is a second result, determining a product of a second proportional factor and a current output power of each photovoltaic inverter as an output power adjustment result of each photovoltaic inverter; The absolute value of the difference between the first scale factor and 1 is greater than the absolute value of the difference between the second scale factor and 1.

8. 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 program, the distribution network voltage regulation method according to any one of claims 1 to 6 is implemented.

9. A machine-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the distribution network voltage regulation method according to any one of claims 1 to 6 is implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the distribution network voltage regulation method according to any one of claims 1 to 6 is implemented.

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