Rapid model establishment and accurate corrosion diagnosis method for transformer substation grounding grid

Abstract

The invention relates to a rapid model establishment and accurate corrosion diagnosis method for a transformer substation grounding grid, which is technically characterized by comprising the steps ofobtaining a drawing of the transformer substation grounding grid according to the electrical integrity test condition of a transformer substation; establishing a VISIO-based transformer substation grounding grid rapid model according to the drawing of the transformer substation grounding grid; and accurately diagnosing the corrosion according to the established model. According to the invention, VISIO software is used to carry out rapid and efficient modeling on the grounding grid, the model is processed by using a Tellegen's theorem, an epsilon-dimensional fault diagnosis equation set is constructed, and finally, the underdetermined equation set is solved by using a particle swarm algorithm for local optimization by using a least square method, so that the grounding grid can be accuratelyand quickly modeled, and the corrosion fault position and the corrosion fault degree of the grounding grid can be accurately positioned and judged through calculation.

Description

technical field [0001] The invention belongs to the field of power grounding grid fault diagnosis algorithms, in particular to a method for rapid model establishment and corrosion accurate diagnosis of a substation grounding grid. Background technique [0002] According to the standard requirements, the buried depth of the grounding grid should exceed 0.8m. Large-scale substations should measure the electrical integrity of the grounding grid every year to indirectly judge the grounding performance of the grounding grid. However, the electrical integrity of the grounding grid can still easily meet the standard requirements even if a part of the grounding body is severely corroded or even broken. When the electrical integrity of the grounding grid is abnormal, it is impossible to know the specific location of the fault, and large-scale excavation is required to find the fault point. The workload is huge and the cost is high, and it also affects the operation of the power syste...

AI Technical Summary

Problems solved by technology

When the electrical integrity of the grounding grid is abnormal, it is impossible to know the specific location of the fault, and large-scale excavation is required to find the fault point, which has a huge workload and high cost, and also affects the operation of the power system

Images