Study on the Short Distance Testing Method of Substation Grounding Resistance

Traditional testing method of grounding resistance needs long test leads,so some time it is difficult to realize due to the restriction by substation environment.This paper studies a more practical short distance testing method of grounding resistance.By this method,under the circumstance of fixed position of current electrode,the testing position of voltage electrode is decided through simulation calculation.The actual testing is performed to a simulated grounding network by this method,and the result is compared and discussed with the results by voltage drop method and 0.618 method.The result of test shows that by using short distance testing method the grounding resistance could be correctly measured,meantime the length of test current electrode leads are greatly shortened.