Method research on measurement with short leads of grounding resistance of grounding grids

摘要

Grounding resistance is the main technical qualification of grounding system about Power plant and substation. We analyzed the feasibility of the method of measurement with short leads and discussed the current electrode lead length by comparing Common measurement methods of grounding resistance, a MATLAB software calculating program was compiled, and we calculated the position of measurement compensation point under the condition of uniform and vertical layered soil; The potential distribution of grounding grids was simulated under the uniform and vertical layered soil with ground simulation software CDEGS, the revised position of the result of measurement with short leads was compared with the real grounding resistance of grounding grids. Comparison results show that the rationality of the Measurement with short Leads method and the modifier formulas.