基于调匝式消弧线圈的虚幻接地解决措施

Solutions for Virtual Grounding Based on Turn-adjustable Arc Suppression Coil

摘要:

针对调匝式消弧线圈系统频繁出现虚幻接地的现实情况，考虑消弧线圈设备参数及结构设置对其补偿算法的影响，对虚幻接地产生的原因进行了研究。在对消弧线圈控制原理进行理论分析的基础上，模拟实际运行情况，设计并完成了触发实验和调挡实验；进而深入分析并验证了消弧线圈自身装置对虚幻接地的影响，提出了消弧线圈触发装置升级改造的优化结构，并为消弧线圈投运前触发功能检测提供了阈值实验方案。同时考虑多台消弧线圈并列运行的安排策略，有助于保证消弧线圈能够精准补偿系统容流，避免产生虚幻接地，对减少电力调度工作中接地误判有一定的积极作用。

Abstract:

In view of the reality that virtual grounding frequently occurs in turn-adjustable arc suppression coil system, the causes of virtual grounding are studied considering the influence of equipment parameters and structure settings of arc-suppression coil on its compensation algorithm. Based on the theoretical analysis of arc-suppression coil control principle, the actual operation is simulated, the trigger experiment and shift experiment are designed and completed, and then the influence of arc-suppression coil device on the occurrence of virtual grounding is deeply analyzed and verified, and the optimized structure of trigger device of arc-suppression coil after upgrading is proposed. The threshold test scheme is provided for triggering function detection of arc-suppression coil before being put into operation, and the arrangement strategy of parallel operation of multiple arc-suppression coils is considered, which is helpful to ensure that arcsuppression coil can accurately compensate system capacity flow, avoid virtual grounding, and play a certain positive role in reducing grounding misjudgment in power dispatching.