CN-122017400-A - Method, device, equipment, storage medium and program product for monitoring ground resistance in low-voltage transformer area in power grid

CN122017400ACN 122017400 ACN122017400 ACN 122017400ACN-122017400-A

Abstract

The embodiment of the application provides a method, a device, equipment, a storage medium and a program product for monitoring ground resistance in a low-voltage transformer area in a power grid. The method comprises the steps of obtaining a first resistance value and an environmental parameter of a grounding resistor in a low-voltage platform area in a power grid at a historical time, optimizing the first resistance value of the grounding resistor in the low-voltage platform area at the historical time based on the first resistance value of each other grounding resistor in the low-voltage platform area at the historical time, obtaining a target resistance value of the grounding resistor in the low-voltage platform area at the historical time, determining and displaying monitoring information of the grounding resistor in the low-voltage platform area according to the target resistance value and the environmental parameter of the grounding resistor in the low-voltage platform area at the historical time, and judging whether the grounding resistor has faults or not according to the monitoring information. The method is used for improving the accuracy of fault monitoring of the grounding resistance in the low-voltage transformer area in the power grid.

Inventors

LI LINGYONG
LIU JINGYE

Assignees

广东电网有限责任公司梅州供电局

Dates

Publication Date: 20260512
Application Date: 20260115

Claims (12)

1. A method for monitoring ground resistance in a low voltage transformer area in an electrical network, comprising: acquiring a first resistance value and an environmental parameter of a grounding resistor in a low-voltage transformer area in the power grid at a historical moment; Optimizing the first resistance value of the grounding resistor in the low-voltage platform area at the historical time based on the first resistance value of each other grounding resistor in the low-voltage platform area at the historical time so as to eliminate the influence of the other grounding resistors on the first resistance value of the grounding resistor and obtain a target resistance value of the grounding resistor in the low-voltage platform area at the historical time; And determining and displaying monitoring information of the grounding resistance in the low-voltage platform area according to the target resistance value and the environmental parameter of the grounding resistance in the low-voltage platform area at the historical time, wherein the monitoring information represents whether the grounding resistance has faults or not.
2. The method of claim 1, wherein optimizing the first resistance value of the ground resistance in the low-voltage transformer area at the historical time based on the first resistance values of the other ground resistances in the low-voltage transformer area at the historical time to obtain the target resistance value of the ground resistance in the low-voltage transformer area at the historical time includes: for each grounding resistance, repeating the following steps until reaching the preset condition: Generating an adjustment resistance value of each grounding resistor at the historical time according to a second resistance value of each other grounding resistor at the historical time, wherein the initial value of the second resistance value is a first resistance value; Updating the second resistance value of each grounding resistor at the historical moment according to the second resistance value, the adjusting resistance value and the first resistance value of each grounding resistor at the historical moment; And when the preset conditions are met, determining the second resistance value of each obtained grounding resistor at the historical time as the target resistance value of each grounding resistor at the historical time.
3. The method of claim 2, wherein for each ground resistance, generating an adjusted resistance value for each ground resistance at a historical time based on a second resistance value for each of the other ground resistances at the historical time, comprises: and summing the derivatives of the second resistance values of the other grounding resistors at the historical time points aiming at each grounding resistor to obtain the adjustment resistance value of each grounding resistor at the historical time points.
4. The method of claim 2, wherein the updated second resistance value of each ground resistance is: ; Wherein, the The updated second resistance value of the ith grounding resistance at the historical time after the kth updating operation is represented; a first resistance value of the ith grounding resistance at a historical time is represented; Representing the adjusted resistance value of the ith grounding resistance at the historical time during the kth updating operation, the And the second resistance value of the ith grounding resistance at the historical time in the kth updating operation.
5. The method of claim 1, wherein determining and displaying monitoring information of the ground resistance in the low voltage zone at the historical time based on the target resistance value and the environmental parameter of the ground resistance in the low voltage zone at the historical time comprises: Aiming at each grounding resistor, obtaining the environmental difference value of the grounding resistor at the adjacent time according to the difference value of the environmental parameter of the grounding resistor at the adjacent time; And aiming at each grounding resistor, if the target resistance value of the grounding resistor at the continuous adjacent time is determined to be larger than a preset resistance threshold value, and the environment difference value of the grounding resistor at the continuous adjacent time is determined to be smaller than the preset environment difference value threshold value, determining that the monitoring information of the grounding resistor represents that the grounding resistor has faults.
6. The method according to any one of claims 1-5, further comprising: and processing the first resistance value of the grounding resistor at the current moment and the environmental parameter based on a preset regression model, and predicting to obtain the first resistance value of the grounding resistor at the future moment.
7. The method of claim 6, wherein the method further comprises: Establishing a regression model of the change of the resistance influence value of the grounding resistor along with the change of the environmental parameter according to the environmental parameter of the grounding resistor at each historical moment, wherein the resistance influence value represents the resistance difference value of the grounding resistor influenced by the environment between any two adjacent historical moments; And carrying out parameter tuning on the regression model according to the environmental parameters of the grounding resistor at each historical moment based on a preset objective function to obtain the preset regression model, wherein the objective function is used for minimizing the sum of resistance influence values of the grounding resistor at a plurality of historical moments.
8. The method according to any one of claims 1-5, wherein the environmental parameters include at least one of: Temperature, humidity, and electromagnetic interference information of the environment in which the ground resistor is located.
9. A device for monitoring ground resistance in a low voltage transformer area in an electrical network, comprising: the acquisition module is used for acquiring a first resistance value and an environmental parameter of the grounding resistance in the low-voltage transformer area in the power grid at a historical time; The optimizing module is used for optimizing the first resistance value of the grounding resistor in the low-voltage platform area at the historical time based on the first resistance value of each other grounding resistor in the low-voltage platform area at the historical time so as to eliminate the influence of the other grounding resistor on the first resistance value of the grounding resistor and obtain a target resistance value of the grounding resistor in the low-voltage platform area at the historical time; and the monitoring module is used for determining and displaying monitoring information of the grounding resistance in the low-voltage transformer area according to the target resistance value and the environmental parameter of the grounding resistance in the low-voltage transformer area at the historical time, wherein the monitoring information represents whether the grounding resistance has faults or not.
10. The monitoring device for the grounding resistance in the low-voltage transformer area in the power grid is characterized by comprising a memory and a processor; The memory stores computer-executable instructions; The processor executing computer-executable instructions stored in the memory, causing the processor to perform the method of any one of claims 1-7.
11. A computer readable storage medium having stored therein computer executable instructions which when executed by a processor are adapted to carry out the method of any one of claims 1-7.
12. A computer program product comprising a computer program which, when executed by a processor, implements the method of any of claims 1-7.

Description

Method, device, equipment, storage medium and program product for monitoring ground resistance in low-voltage transformer area in power grid Technical Field The present application relates to the field of electrical technologies, and in particular, to a method, an apparatus, a device, a storage medium, and a program product for monitoring a ground resistance in a low-voltage transformer area in a power grid. Background In a power system, monitoring the ground resistance in a low-voltage transformer area in a power grid to acquire fault information of the ground resistance becomes an important link for guaranteeing safe operation of the power grid. In the related art, the measured resistance values of the ground resistors are respectively subjected to data analysis processing by measuring the resistance values of the ground resistors, so as to obtain the monitoring result of the ground resistors. However, the measured value of the resistance value of the ground resistance in the low-voltage transformer area is easily affected by other ground resistances and environmental changes, and thus, the related art has a technical problem in that the monitoring result of the ground resistance is inaccurate. Therefore, how to improve the accuracy of the monitoring result of the ground resistance in the low-voltage transformer area in the power grid is a problem to be solved. Disclosure of Invention The embodiment of the application provides a method, a device, equipment, a storage medium and a program product for monitoring the grounding resistance in a low-voltage transformer area in a power grid, which are used for improving the accuracy of the monitoring result of the grounding resistance in the low-voltage transformer area in the power grid. In a first aspect, an embodiment of the present application provides a method for monitoring a ground resistance in a low-voltage transformer area in a power grid, including: acquiring a first resistance value and an environmental parameter of a grounding resistor in a low-voltage transformer area in the power grid at a historical moment; Optimizing the first resistance value of the grounding resistor in the low-voltage platform area at the historical time based on the first resistance value of each other grounding resistor in the low-voltage platform area at the historical time so as to eliminate the influence of the other grounding resistors on the first resistance value of the grounding resistor and obtain a target resistance value of the grounding resistor in the low-voltage platform area at the historical time; And determining and displaying monitoring information of the grounding resistance in the low-voltage platform area according to the target resistance value and the environmental parameter of the grounding resistance in the low-voltage platform area at the historical time, wherein the monitoring information represents whether the grounding resistance has faults or not. In one possible implementation manner, for the ground resistance in the low-voltage platform area, based on the first resistance value of each other ground resistance in the low-voltage platform area at the historical time, the optimizing process is performed on the first resistance value of the ground resistance in the low-voltage platform area at the historical time to obtain the target resistance value of the ground resistance in the low-voltage platform area at the historical time, including: for each grounding resistance, repeating the following steps until reaching the preset condition: Generating an adjustment resistance value of each grounding resistor at the historical time according to a second resistance value of each other grounding resistor at the historical time, wherein the initial value of the second resistance value is a first resistance value; Updating the second resistance value of each grounding resistor at the historical moment according to the second resistance value, the adjusting resistance value and the first resistance value of each grounding resistor at the historical moment; And when the preset conditions are met, determining the second resistance value of each obtained grounding resistor at the historical time as the target resistance value of each grounding resistor at the historical time. In one possible implementation manner, for each ground resistor, generating an adjusted resistance value of each ground resistor at a historical time according to a second resistance value of each other ground resistor at the historical time includes: and summing the derivatives of the second resistance values of the other grounding resistors at the historical time points aiming at each grounding resistor to obtain the adjustment resistance value of each grounding resistor at the historical time points. In one possible implementation, the updated second resistance value of each ground resistor is: ; Wherein, the The updated second resistance value of the ith grounding resistance at the