Low-frequency and low-voltage power grid load shedding method, device, equipment and medium

Abstract

The invention discloses a low-frequency and low-voltage power grid load shedding method, device and equipment and a medium, and relates to the field of power grid regulation and control, and the method comprises the steps: obtaining the load operation data of each load point in a to-be-regulated and controlled low-frequency and low-voltage power grid; inputting the load operation data of each load point into the power grid power flow model to obtain load change data of each load point, and analyzing the load change data of each load point to obtain a load shedding influence factor of each load point; wherein the power grid power flow model is obtained based on the node topology of the low-frequency and low-voltage power grid; according to the load shedding influence factor of each load point and the current power grid capacity, combining an optimization algorithm to obtain a power grid load shedding strategy of the low-frequency and low-voltage power grid; and regulating and controlling the low-frequency and low-voltage power grid according to the power grid load shedding strategy. According to the invention, the technical problem of unreasonable load shedding of the existing low-frequency and low-voltage power grid can be solved.

Description

Technical Field

[0001] The present application relates to the field of power grid regulation, and in particular to a method, device, equipment and medium for reducing load on a low-frequency and low-voltage power grid. Background Art

[0002] When the power system of the power grid is too low or the voltage is too low due to a fault in the power grid, it is necessary to cut off part of the load to prevent the power or voltage from continuing to drop. This is the cause of low frequency / low voltage in the power grid and its load reduction measures. As an important safety measure, it can ensure the normal operation of the power grid. The traditional low-frequency and low-voltage load reduction method usually generates a load reduction strategy based on line acquisition feedback, and takes action in combination with the preset frequency and voltage constants. It has the problems of low sensitivity, slow response speed and unreasonable load reduction strategy. Therefore, how to improve the rationality of load reduction in low-frequency and low-voltage power grids is still a technical problem that needs to be solved urgently in the prior art. Summary of the invention

[0003] The present application provides a method, device, equipment and medium for reducing load of a low-frequency and low-voltage power grid, so as to solve the technical problem of unreasonable load reduction of the existing low-frequency and low-voltage power grid.

[0004] According to a first aspect of an embodiment of the present application, a method for reducing load on a low-frequency and low-voltage power grid is provided, comprising:

[0005] Obtain load operation data of each load point in the low-frequency and low-voltage power grid to be regulated;

[0006] Inputting the load operation data of each load point into the power grid flow model to obtain the load change data of each load point, and analyzing the load change data of each load point to obtain the load reduction impact factor of each load point; wherein the power grid flow model is obtained based on the node topology of the low-frequency and low-voltage power grid;

[0007] According to the load shedding influence factor of each load point and the current grid capacity, combined with the optimization algorithm, a grid load shedding strategy for the low-frequency low-voltage grid is obtained;

[0008] According to the grid load reduction strategy, the low-frequency and low-voltage grid is regulated.

[0009] The present application first obtains the load operation data of each load point in the low-frequency and low-voltage power grid, inputs the power grid flow model to obtain the load change data of each load point, and then analyzes to obtain the load reduction influence factor of each load point, and can determine the load reduction influence of each load point on the low-frequency and low-voltage power grid based on the load change of each load point. Considering the load reduction influence brought by the load change of the load point can improve the rationality of load reduction, and then combining the current power grid capacity and the optimization algorithm to obtain the power grid load reduction strategy, which can improve the rationality of the load reduction strategy, and further improve the rationality of load reduction, so as to improve the rationality of load reduction regulation when the low-frequency and low-voltage power grid is regulated according to the power grid load reduction strategy.

[0010] In certain embodiments of the present application, the load change data of each load point is analyzed to obtain the load reduction impact factor of each load point, specifically including:

[0011] Based on the regression analysis model, the load change data of each load point is analyzed to obtain the load reduction influencing factors of each load point.

[0012] The present application analyzes the load change data through a regression analysis model to obtain the load shedding influence factor of each load point. The model is simple and easy to use, has strong adaptability and high accuracy, and can make the obtained load shedding influence factor more in line with the current power grid load shedding control task needs.

[0013] In certain embodiments of the present application, the load shedding strategy of the low-frequency low-voltage power grid is obtained based on the load shedding impact factor of each load point and the current power grid capacity in combination with an optimization algorithm, specifically including:

[0014] According to the load shedding influence factor and load operation data of each load point, combined with the current power grid capacity, an initial load shedding strategy of the low-frequency low-voltage power grid is obtained;

[0015] Based on the optimization algorithm, the initial load reduction strategy is optimized with the minimum grid load fluctuation as the optimization goal to obtain the grid load reduction strategy of the low-frequency and low-voltage grid.

[0016] This application first obtains an initial load shedding strategy based on the load shedding influence factor and load operation data of each load point in combination with the grid capacity, takes into account the load shedding impact caused by the load change of the load point, improves the rationality of the initial load shedding strategy, and then improves the rationality of the grid load shedding strategy when the grid load shedding strategy is obtained based on the optimization algorithm, thereby further improving the rationality of load shedding.

[0017] In certain embodiments of the present application, regulating the low-frequency low-voltage power grid according to the power grid load reduction strategy specifically includes:

[0018] According to a preset load shedding strategy action conversion table, corresponding to the power grid load shedding strategy, a power grid load shedding action is obtained;

[0019] According to the grid load shedding action, a corresponding grid load shedding instruction is generated, and the grid load shedding instruction is sent to the load point corresponding to the grid load shedding strategy to perform the load shedding action, so as to complete the regulation of the low-frequency and low-voltage grid.

[0020] The present application first obtains the grid load shedding action according to the load shedding strategy action conversion table, and then generates a grid load shedding instruction, and then sends the grid load shedding instruction to the corresponding load point for load shedding action. The load shedding action can be accurately converted based on the load shedding strategy, which is more in line with the current grid load shedding control task needs and improves the rationality of load shedding control.

[0021] According to a second aspect of the implementation of the present application, there is provided a low-frequency and low-voltage power grid load shedding device, comprising an operation data acquisition module, a load change analysis module, a load shedding strategy generation module and a power grid load shedding control module;

[0022] The operation data acquisition module is used to acquire the load operation data of each load point in the low-frequency and low-voltage power grid to be regulated;

[0023] The load change analysis module is used to input the load operation data of each load point into the power grid flow model to obtain the load change data of each load point, and analyze the load change data of each load point to obtain the load reduction impact factor of each load point; wherein the power grid flow model is obtained based on the node topology of the low-frequency low-voltage power grid;

[0024] The load shedding strategy generation module is used to obtain the grid load shedding strategy of the low-frequency low-voltage grid according to the load shedding influence factor of each load point and the current grid capacity in combination with an optimization algorithm;

[0025] The power grid load shedding control module is used to control the low-frequency low-voltage power grid according to the power grid load shedding strategy.

[0026] In certain embodiments of the present application, the load change analysis module includes a load change analysis unit;

[0027] The load change analysis unit is used to analyze the load change data of each load point based on a regression analysis model to obtain the load reduction influence factor of each load point.

[0028] In certain embodiments of the present application, the load shedding strategy generation module includes an initial strategy generation unit and a load shedding strategy optimization unit;

[0029] The initial strategy generating unit is used to obtain the initial load shedding strategy of the low-frequency low-voltage power grid according to the load shedding influence factor and load operation data of each load point in combination with the current power grid capacity;

[0030] The load shedding strategy optimization unit is used to optimize the initial load shedding strategy based on an optimization algorithm and taking the minimum grid load fluctuation as an optimization goal to obtain a grid load shedding strategy for the low-frequency and low-voltage grid.

[0031] In certain embodiments of the present application, the power grid load shedding control module includes a load shedding action acquisition unit and a load point action unit;

[0032] The load shedding action acquisition unit is used to obtain a power grid load shedding action corresponding to the power grid load shedding strategy according to a preset load shedding strategy action conversion table;

[0033] The load point action unit is used to generate a corresponding power grid load reduction instruction according to the power grid load reduction action, and send the power grid load reduction instruction to the load point corresponding to the power grid load reduction strategy to perform load reduction action, so as to complete the regulation of the low-frequency low-voltage power grid.

[0034] The present application first obtains the load operation data of each load point in the low-frequency and low-voltage power grid, inputs the power grid flow model to obtain the load change data of each load point, and then analyzes to obtain the load reduction influence factor of each load point, and can determine the load reduction influence of each load point on the low-frequency and low-voltage power grid based on the load change of each load point. Considering the load reduction influence brought by the load change of the load point can improve the rationality of load reduction, and then combining the current power grid capacity and the optimization algorithm to obtain the power grid load reduction strategy, which can improve the rationality of the load reduction strategy, and further improve the rationality of load reduction, so as to improve the rationality of load reduction regulation when the low-frequency and low-voltage power grid is regulated according to the power grid load reduction strategy.

[0035] According to a third aspect of the implementation scheme of the present application, a computer device is provided, comprising: a processor; a memory; a computer program stored in the memory and configured to be executed by the processor; wherein when the processor executes the computer program, a low-frequency and low-voltage power grid load reduction method described in the present application is implemented.

[0036] According to a fourth aspect of the implementation manner of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a plurality of instructions, wherein the instructions are suitable for loading by a processor to execute a low-frequency and low-voltage power grid load reduction method described in the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 : is a flow chart of a method for reducing load of a low-frequency and low-voltage power grid shown in certain embodiments of the present application;

[0038] Figure 2 : A module structure diagram of a low-frequency and low-voltage power grid load reduction device shown in certain embodiments of the present application. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below in conjunction with the accompanying drawings are exemplary and are only used to explain some embodiments of the present application, and should not be construed as limitations on the embodiments of the present application. Based on the embodiments shown in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0040] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, unless otherwise clearly and specifically defined, "multiple" and "several" mean two or more.

[0041] Traditional low-frequency and low-voltage load shedding methods usually generate load shedding strategies based on line collection feedback and take action in combination with preset frequency and voltage values. They have problems such as low sensitivity, slow response speed, and unreasonable load shedding strategies. Therefore, how to improve the rationality of load shedding in low-frequency and low-voltage power grids is still a technical problem that needs to be solved urgently in the existing technology.

[0042] Based on the above technical background, please refer to Figure 1 The embodiment of the present application provides a method for reducing load of a low-frequency and low-voltage power grid, including steps S101 to S104, each of which is specifically as follows:

[0043] Step S101: Obtain load operation data of each load point in the low-frequency and low-voltage power grid to be regulated.

[0044] In certain embodiments of the present application, the load operation data includes voltage data and frequency data of each load point. It should be understood that since both voltage data and frequency data fluctuate over a long period of time, the data type of the load operation data is specifically a time series type.

[0045] In certain embodiments of the present application, the method of obtaining the load operation data of each load point in the low-frequency and low-voltage power grid to be regulated is specifically: obtaining the initial load operation data of each load point in the low-frequency and low-voltage power grid to be regulated; filtering and denoising the initial load operation data of each load point to obtain the load operation data of each load point.

[0046] Step S102: input the load operation data of each load point into the power grid flow model to obtain the load change data of each load point, and analyze the load change data of each load point to obtain the load reduction impact factor of each load point; wherein the power grid flow model is obtained based on the node topology of the low-frequency and low-voltage power grid.

[0047] In certain embodiments of the present application, the load change data of each load point is analyzed to obtain the load reduction impact factor of each load point, specifically including:

[0048] Based on the regression analysis model, the load change data of each load point is analyzed to obtain the load reduction influencing factors of each load point.

[0049] In certain embodiments of the present application, the regression analysis model can be a linear regression model, specifically a univariate linear regression model or a multivariate linear regression model; it can also be a logit regression model, specifically a binary logit regression model, a multinomial logit regression model or an ordered logit regression model; preferably, a multivariate linear regression model.

[0050] The present application analyzes the load change data through a regression analysis model to obtain the load shedding influence factor of each load point. The model is simple and easy to use, has strong adaptability and high accuracy, and can make the obtained load shedding influence factor more in line with the current power grid load shedding control task needs.

[0051] Step S103: According to the load shedding influence factor of each load point and the current grid capacity, in combination with an optimization algorithm, a grid load shedding strategy for the low-frequency low-voltage grid is obtained.

[0052] In certain embodiments of the present application, the load shedding strategy of the low-frequency low-voltage power grid is obtained based on the load shedding impact factor of each load point and the current power grid capacity in combination with an optimization algorithm, specifically including:

[0053] According to the load shedding influence factor and load operation data of each load point, combined with the current power grid capacity, an initial load shedding strategy of the low-frequency low-voltage power grid is obtained;

[0054] Based on the optimization algorithm, the initial load reduction strategy is optimized with the minimum grid load fluctuation as the optimization goal to obtain the grid load reduction strategy of the low-frequency and low-voltage grid.

[0055] In certain embodiments of the present application, the optimization algorithm may be a linear programming algorithm or a genetic algorithm and any one of their improved algorithms, preferably a linear programming algorithm.

[0056] This application first obtains an initial load shedding strategy based on the load shedding influence factor and load operation data of each load point in combination with the grid capacity, takes into account the load shedding impact caused by the load change of the load point, improves the rationality of the initial load shedding strategy, and then improves the rationality of the grid load shedding strategy when the grid load shedding strategy is obtained based on the optimization algorithm, thereby further improving the rationality of load shedding.

[0057] Step S104: regulating the low-frequency low-voltage power grid according to the power grid load reduction strategy.

[0058] In certain embodiments of the present application, regulating the low-frequency low-voltage power grid according to the power grid load reduction strategy specifically includes:

[0059] According to a preset load shedding strategy action conversion table, corresponding to the power grid load shedding strategy, a power grid load shedding action is obtained;

[0060] According to the grid load shedding action, a corresponding grid load shedding instruction is generated, and the grid load shedding instruction is sent to the load point corresponding to the grid load shedding strategy to perform the load shedding action, so as to complete the regulation of the low-frequency and low-voltage grid.

[0061] The present application first obtains the grid load shedding action according to the load shedding strategy action conversion table, and then generates a grid load shedding instruction, and then sends the grid load shedding instruction to the corresponding load point for load shedding action. The load shedding action can be accurately converted based on the load shedding strategy, which is more in line with the current grid load shedding control task needs and improves the rationality of load shedding control.

[0062] Compared with the prior art, the present application first obtains the load operation data of each load point in the low-frequency and low-voltage power grid, inputs the power grid flow model to obtain the load change data of each load point, and then analyzes and obtains the load reduction impact factor of each load point, and can determine the load reduction impact of each load point on the low-frequency and low-voltage power grid based on the load change of each load point. Considering the load reduction impact caused by the load change of the load point can improve the rationality of load reduction, and then combining the current power grid capacity and the optimization algorithm to obtain the power grid load reduction strategy, which can improve the rationality of the load reduction strategy, and further improve the rationality of load reduction, so as to improve the rationality of load reduction regulation when the low-frequency and low-voltage power grid is regulated according to the power grid load reduction strategy.

[0063] Corresponding to the previous method, see Figure 2 , the embodiment of the present application provides a low-frequency and low-voltage power grid load shedding device, including an operation data acquisition module 210, a load change analysis module 220, a load shedding strategy generation module 230 and a power grid load shedding control module 240;

[0064] The operation data acquisition module 210 is used to acquire the load operation data of each load point in the low-frequency low-voltage power grid to be regulated;

[0065] The load change analysis module 220 is used to input the load operation data of each load point into the power grid flow model to obtain the load change data of each load point, and analyze the load change data of each load point to obtain the load reduction impact factor of each load point; wherein the power grid flow model is obtained based on the node topology of the low-frequency low-voltage power grid;

[0066] The load shedding strategy generating module 230 is used to obtain the load shedding strategy of the low-frequency low-voltage power grid according to the load shedding influence factor of each load point and the current power grid capacity in combination with an optimization algorithm;

[0067] The power grid load shedding control module 240 is used to control the low-frequency low-voltage power grid according to the power grid load shedding strategy.

[0068] In certain embodiments of the present application, the load change analysis module 220 includes a load change analysis unit;

[0069] The load change analysis unit is used to analyze the load change data of each load point based on a regression analysis model to obtain the load reduction influence factor of each load point.

[0070] In certain embodiments of the present application, the load shedding strategy generation module 230 includes an initial strategy generation unit and a load shedding strategy optimization unit;

[0071] The initial strategy generating unit is used to obtain the initial load shedding strategy of the low-frequency low-voltage power grid according to the load shedding influence factor and load operation data of each load point in combination with the current power grid capacity;

[0072] The load shedding strategy optimization unit is used to optimize the initial load shedding strategy based on an optimization algorithm and taking the minimum grid load fluctuation as an optimization goal to obtain a grid load shedding strategy for the low-frequency and low-voltage grid.

[0073] In certain embodiments of the present application, the power grid load shedding control module 240 includes a load shedding action acquisition unit and a load point action unit;

[0074] The load shedding action acquisition unit is used to obtain a power grid load shedding action corresponding to the power grid load shedding strategy according to a preset load shedding strategy action conversion table;

[0075] The load point action unit is used to generate a corresponding power grid load reduction instruction according to the power grid load reduction action, and send the power grid load reduction instruction to the load point corresponding to the power grid load reduction strategy to perform load reduction action, so as to complete the regulation of the low-frequency low-voltage power grid.

[0076] The present application first obtains the load operation data of each load point in the low-frequency and low-voltage power grid, inputs the power grid flow model to obtain the load change data of each load point, and then analyzes to obtain the load reduction influence factor of each load point, and can determine the load reduction influence of each load point on the low-frequency and low-voltage power grid based on the load change of each load point. Considering the load reduction influence brought by the load change of the load point can improve the rationality of load reduction, and then combining the current power grid capacity and the optimization algorithm to obtain the power grid load reduction strategy, which can improve the rationality of the load reduction strategy, and further improve the rationality of load reduction, so as to improve the rationality of load reduction regulation when the low-frequency and low-voltage power grid is regulated according to the power grid load reduction strategy.

[0077] It should be understood that the device provided in the embodiment of the present application corresponds to the aforementioned method, and a low-frequency and low-voltage power grid load reduction device provided in the embodiment of the present application can implement a low-frequency and low-voltage power grid load reduction method provided in any embodiment of the present application.

[0078] Adaptively, the embodiments of the present application also provide a computer device and a computer-readable storage medium.

[0079] The computer device comprises: a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor;

[0080] Wherein, when the processor executes the computer program, a low-frequency and low-voltage power grid load reduction method of the present application is implemented.

[0081] The computer-readable storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor to execute a low-frequency and low-voltage power grid load reduction method of the present application.

[0082] The above are some implementation methods of the present application, and the purpose, technical scheme and beneficial effects of the present application are further described in detail. It should be clear that the above-mentioned partial implementation methods of the present application cannot be understood as limiting the present application. It is particularly pointed out that for those skilled in the art, any changes, modifications, equivalent substitutions and variations made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A method for reducing load on a low-frequency and low-voltage power grid, characterized in that: include: Obtain load operation data of each load point in the low-frequency and low-voltage power grid to be regulated; Inputting the load operation data of each load point into the power grid flow model to obtain the load change data of each load point, and analyzing the load change data of each load point to obtain the load reduction impact factor of each load point; wherein the power grid flow model is obtained based on the node topology of the low-frequency and low-voltage power grid; According to the load shedding influence factor of each load point and the current grid capacity, combined with the optimization algorithm, a grid load shedding strategy for the low-frequency low-voltage grid is obtained; According to the grid load reduction strategy, the low-frequency and low-voltage grid is regulated.

2. A method for reducing load on a low-frequency and low-voltage power grid according to claim 1, characterized in that: The load change data of each load point is analyzed to obtain the load reduction influence factor of each load point, specifically including: Based on the regression analysis model, the load change data of each load point is analyzed to obtain the load reduction influencing factors of each load point.

3. A method for reducing load on a low-frequency and low-voltage power grid according to claim 1, characterized in that: The load shedding strategy of the low-frequency low-voltage power grid is obtained based on the load shedding influence factor of each load point and the current power grid capacity in combination with the optimization algorithm, specifically including: According to the load shedding influence factor and load operation data of each load point, combined with the current power grid capacity, an initial load shedding strategy of the low-frequency low-voltage power grid is obtained; Based on the optimization algorithm, the initial load reduction strategy is optimized with the minimum grid load fluctuation as the optimization goal to obtain the grid load reduction strategy of the low-frequency and low-voltage grid.

4. A method for reducing load on a low-frequency and low-voltage power grid according to claim 1, characterized in that: The regulating the low-frequency low-voltage power grid according to the power grid load reduction strategy specifically includes: According to a preset load shedding strategy action conversion table, corresponding to the power grid load shedding strategy, a power grid load shedding action is obtained; According to the grid load shedding action, a corresponding grid load shedding instruction is generated, and the grid load shedding instruction is sent to the load point corresponding to the grid load shedding strategy to perform the load shedding action, so as to complete the regulation of the low-frequency and low-voltage grid.

5. A low-frequency and low-voltage power grid load reduction device, characterized in that: It includes operation data acquisition module, load change analysis module, load reduction strategy generation module and power grid load reduction control module; The operation data acquisition module is used to acquire the load operation data of each load point in the low-frequency and low-voltage power grid to be regulated; The load change analysis module is used to input the load operation data of each load point into the power grid flow model to obtain the load change data of each load point, and analyze the load change data of each load point to obtain the load reduction impact factor of each load point; wherein the power grid flow model is obtained based on the node topology of the low-frequency low-voltage power grid; The load shedding strategy generation module is used to obtain the grid load shedding strategy of the low-frequency low-voltage grid according to the load shedding influence factor of each load point and the current grid capacity in combination with an optimization algorithm; The power grid load shedding control module is used to control the low-frequency low-voltage power grid according to the power grid load shedding strategy.

6. A low-frequency and low-voltage power grid load reduction device according to claim 5, characterized in that: The load change analysis module includes a load change analysis unit; The load change analysis unit is used to analyze the load change data of each load point based on a regression analysis model to obtain the load reduction influence factor of each load point.

7. A low-frequency and low-voltage power grid load reduction device according to claim 5, characterized in that: The load shedding strategy generation module includes an initial strategy generation unit and a load shedding strategy optimization unit; The initial strategy generating unit is used to obtain the initial load shedding strategy of the low-frequency low-voltage power grid according to the load shedding influence factor and load operation data of each load point in combination with the current power grid capacity; The load shedding strategy optimization unit is used to optimize the initial load shedding strategy based on an optimization algorithm and taking the minimum grid load fluctuation as an optimization goal to obtain a grid load shedding strategy for the low-frequency and low-voltage grid.

8. A low-frequency and low-voltage power grid load reduction device according to claim 5, characterized in that: The power grid load shedding control module includes a load shedding action acquisition unit and a load point action unit; The load shedding action acquisition unit is used to obtain a power grid load shedding action corresponding to the power grid load shedding strategy according to a preset load shedding strategy action conversion table; The load point action unit is used to generate a corresponding power grid load reduction instruction according to the power grid load reduction action, and send the power grid load reduction instruction to the load point corresponding to the power grid load reduction strategy to perform load reduction action, so as to complete the regulation of the low-frequency low-voltage power grid.

9. A computer device, characterized in that: include: processor; Memory; a computer program stored in the memory and configured to be executed by the processor; Wherein, when the processor executes the computer program, a low-frequency and low-voltage power grid load reduction method as described in any one of claims 1 to 4 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor to execute a low-frequency and low-voltage power grid load reduction method as described in any one of claims 1 to 4.

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