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介绍了一种在电网正常工作条件下，利用单片机实现煤矿电网对地电容的测量，测量方法简单、可靠，测量精度较高，可直接显示出单相接地电容的大小。
This paper introduces a method to measure the capacitance of coal mine power grid by using single chip microcomputer under the normal working condition of power grid. The measuring method is simple and reliable, and the measuring precision is high. It can directly show the size of single phase grounding capacitor.