避雷器接地电阻的测量与预测方法

摘要

介绍了避雷器三极法测量接地电阻的接线、测量原理及测量电压的选取,根据测得的历史数据建立了基于回归分析的接地电阻变化趋势预测模型,并通过标准离差检验证明了该预测模型可用于实际接地电阻的预测.实践表明,该测量与预测方法切实可行,能在一定程度上避免因接地电阻超标而引发的雷击事故.%The paper introduced principle of connection, measuring principle and selection of measuring voltage of three-pole measurement method of grounding resistance of arrester, established a trend prediction model of grounding resistance based on regression analysis according to measured history data of grounding resistance, and proved the model can be used to predict actual grounding resistance by standard deviation testing. The practice showed that the methods of measurement and prediction are practical and feasible, which can avoid lightning strokes caused by over standard of grounding resistance in a way.