配电网消弧线圈分散补偿接地方式的研究

消弧线圈分散补偿接地方式具有安装灵活和扩容方便的优点而备受关注,然而有关多个分散补偿消弧线圈接地系统的故障残流及过电压的研究缺乏。讨论了分散式消弧线圈容量配置原则并根据开发区变电站进行实例设计,选择了8种消弧线圈安装方式。通过仿真表明,消弧线圈集中补偿与分散补偿均能满足规程接地残流的要求,且能极大延迟间歇性电弧的重燃时间,而其非故障相弧光过电压水平基本相同,且小于中性点不接地系统,所得结论有利于消弧线圈分散补偿的推广应用。

An Investigation on Decentralized Compensation Grounding Mode for Arc Suppression Coil in D istribution Network

Decentralized compensation grounding mode for Arc suppression coil is concerned due to its advantages of flexible installation and easy expansion,however,there is a lack of investigation on fault residual current and over-voltage appeared in multiple grounding systems for arc suppression coils with decentralized compensation.This article has reviewed the principle of capacity configuration for decentralized arc suppression coil and in a case design for the substation in a development area,8 modes were selected to fix the arc suppression coil.The simulation showed that both centralized compensation and decentralized compensation of arc suppression coil can meet the requirements specified by the provisions on residual current while the re-ignition time for the intermittent arc can be delayed greatly.Whereas its overvoltage level for non-fault phase arc is substantially the same and less than the isolated neutral system.The conclusion is in favor of the extensive applications of the arc suppression coil with decentralized compensation.