基于GIS快速接地开关的自适应重合闸研究

Adaptive Reclosure Technology Based on High Speed Ground Switch of GIS

单相自适应重合闸技术具有诸多传统重合闸技术所不具有的优势,技术的关键是自动化装置如何准确地区分瞬时性故障和永久性故障,提出了基于GIS快速接地开关(HSGS)的一种区分输电线路单相瞬时性故障与永久性故障的新方法。其基本思想是根据在瞬时性故障情况下故障点潜供电弧熄灭后流过快速接地开关的电流峰值明显升高与永久性故障情况下流过快速接地开关的电流变化不明显来区分故障类型。通过公式推导和Simulink仿真测试验证了此方法的可行性,其原理简单,易于实现。

Adaptive single-phase automatic reclosure technology has many advantages which the traditional one does not have. The key of this technology is how to accurately distinguish the transient fault and the permanent fault by the roboticized equipment. A new method is proposed to distinguish the single-phase transient fault and the permanent fault in transmission line based on high speed ground switch （HSGS） . It＇s found that under the transient fault situation after the secondary arc extinction, the peak value of current flowing over HSGS increases obviously, while under the per- manent fault situation, the current almost keeps the same, which can be used to distinguish the fault type. Both the theoretical derivation and the simulation on Simulink prove that the method is feasible, and easy for implementation.