关于中性点接地方式不相容问题研究分析

Study on the Incompatibility of Neutral Point Grounding System

结合某110 kV变电站,在例行电容电流检测过程中,发现中性点消弧线圈接地方式与小电阻接地方式不相容问题,通过分析相关规程要求给出解决方案,同时通过理论和仿真分析研究,给出了小电阻接地方式和消弧线圈接地方式并列时、小电阻接地方式和小电阻接地方式并列时可能存在的需要解决问题,对中压电网电容电流超标治理工作有很好的指导意义。

In a 110 kV substation routine capacitance current detection process,it was found that the neutral arc extinguishing coil grounding method is incompatible with the small resistance grounding method.Solutions are given by analyzing the relevant regulatory requirements.At the same time,through theoretical and simulation analysis and research,it is given that there may be problems to be solved when the small resistance grounding method and the arc suppression coil grounding method are in parallel,and the small resistance grounding method and the small resistance grounding method are juxtaposed.This paper has good guiding significance for the control of capacitor current exceeding the standard in medium-voltage power grids.