Measuring phase-to-ground capacitance based on displacement voltage method

机译：基于位移电压法的相地电容测量

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In order to make sure the best compensation for the grounding fault current, neutral resonant grounding mode via the arc suppression coil is widely used in medium and low voltage distribution network in our country. The key problem is measuring the phase-to-ground capacitance accurately online. Displacement voltage is a method of measuring the phase-to-ground capacitance indirectly. Choosing the suitable inductive reactance is very important to calculation accuracy. The model of neutral resonant grounding is established with the simulation software in this paper. The inductive reactance and the displacement voltage corresponding to reactance are recorded. This paper used non-linear regression method to fit the multinomial between displacement voltage and the reactance. The resonance point can be determined to get the suitable reactance for capacitance calculation. It can improve the calculation accuracy and reduce the error.

机译：为了确保对接地故障电流的最佳补偿，通过消弧线圈的中性点谐振接地方式在我国的中低压配电网中得到了广泛的应用。关键问题是在线准确测量相接地电容。位移电压是一种间接测量相接地电容的方法。选择合适的电感电抗对计算精度非常重要。本文利用仿真软件建立了中性点谐振接地模型。记录感应电抗和与电抗相对应的位移电压。本文采用非线性回归方法拟合位移电压与电抗之间的多项式。可以确定谐振点以获得合适的电抗以进行电容计算。可以提高计算精度，减少误差。

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来源
《2015 5th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies》|2015年|1273-1277|共5页
会议地点 Changsha(CN)
作者
Jie Zhou;
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作者单位

State Grid Jiangsu Economic Research Institute, Nanjing, China;

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原文格式 PDF
正文语种 eng
中图分类
关键词
Matlab simulation; arc suppression coil; non-linear regression; phase-to-ground capacitance; resonance point;

机译：Matlab仿真;电弧抑制线圈;非线性回归;相地电容;谐振点;

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Measuring phase-to-ground capacitance based on displacement voltage method

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