基于二次电弧的单相自适应重合闸判据分析

为了避免单相故障时自动重合闸装置重合于永久性故障,针对高压输电线路,通过对单相接地故障时瞬时性故障与永久性故障的相电压特点进行分析,从原理上揭示了二次电弧燃烧阶段两种故障的电压信号能量分布明显不同.基于此,提出了利用小波包能谱来甄别单相故障性质的方法.理论分析和大量电磁暂态程序EMTP-RV的仿真结果表明该方法能够较为精准地模拟实际故障,具有较好的实践应用价值.

Analysis to Single-phase Adaptive Reclose Criteria Based on Secondary Arc

In order to avoid a failure in the single-phase automatic reclosing device＇s permanent fault, in view of the high voltage transmission lines, single-phase grounding fault based on instantaneous fault and permanent fault phase voltage characteristic analysis reveals that from the principle of the secondary arc combustion phase it is obviously different from two kinds of fault voltage of the signal energy distribution. Based on this, the single-phase fault using wavelet packet energy spectrum is put forward to identify the nature of the method. Theoretical analysis and a large quantity of electromagnetic transient program EMTP - RV results show that the method can more accurately simulate the actual fault, and has good practical application value.