配电网单相接地故障消弧方法探究

Research on Arc Suppression Method for Single-phase Grounding Fault in Distribution Network

配电网发生单相接地故障时,由于接地电流较大,若不及时处理,将导致线路损坏。本文分析了现有配电网单相接地故障有源消弧方法与无源消弧法的特点,并将PI控制应用到有源消弧方法的控制系统中,能有效实现对指令电流的无静差追踪。仿真结果表明,本文所提出方法能降低故障电流,达到可靠消弧目的。

When a single-phase grounding fault occurs in the distribution network, due to the large grounding current,if it is not dealt with in time, the line will be damaged. This paper analyzes the characteristics of active arc suppression methods and passive arc suppression methods for single-phase grounding faults in distribution networks. The PI control is applied to the control system of the active arc suppression method, which can effectively realize the static-free tracking of the command current. The simulation results show that the method proposed in this paper can reduce the fault current and achieve the purpose of reliable arc suppression.