煤矿井下低压电网对地绝缘电阻及分布电容的测量方法分析

摘要

为了验证交流伏安法和交直流伏安法测量煤矿井下低压电网对地绝缘电阻值及分布电容值的准确性,介绍了这两种方法的理论分析和计算公式推导,并利用井下低压电网模拟电路对这两种方法的测量结果进行了比较,得出了交直流伏安法测量的对地绝缘电阻值和分布电容值误差较小的结论.%In order to verify accuracy of values of grounding insulation resistance and distributed capacitance of underground low-voltage power grid measured by AC voltammetry and AC-DC voltammetry, the paper introduced theory analysis and deduction of calculating formula of the two methods, and made comparison for measuring results of the two methods by use of analog circuit of underground low-voltage power grid.It got conclusion that the error of values of grounding insulation resistance and distributed capacitance measured by AC-DC voltammetry is smaller.