单相自适应重合闸相位判据的研究

自适应自动重合闸技术具有诸多传统重合闸技术所不具有的优势。提出了一种新型区分输电线路单相瞬时性故障与永久性故障的方法。当瞬时性故障发生时，短路点电弧熄灭后，在恢复电压阶段，断开相电压的大小及其相位都与永久性故障情况有本质不同。在详细分析断开相电压工频分量组成部分的基础上，利用它们的相位特性，提出了单相自适应重合闸的相位判据，并针对输电线路的实际参数、运行方式以及故障条件对判据的影响做了详尽分析，结果表明，相位判据可以准确判定故障性质。该判据方法简单、可靠，而且仅利用单端电气量，易于实现。EMTP仿真测试和现场录波数据测试都验证了该判据的有效性和准确性。

STUDY ON PHASE CRITERION FOR SINGLE-POLE ADAPTIVE RECLOSURE

Adaptive single pole auto reclosure offers many advantages over the conventional approach. Based on extensive investigation, this paper presents a new method of distinguishing the transient faults and permanent faults on transmission lines. When a transient fault occurs, after the extinction of the fault arc, the magnitude and phase of fault voltage is essentially different to those in the permanent fault case during the stage of recovery voltage. This paper analyzes the characteristics of inductance coupling voltage and capacitance coupling voltage in detail. Based on the characteristics of fault voltage phase, a phase criterion is proposed to realize the single pole adaptive reclosure. The effect of actual line parameter, operation and fault conditions are analyzed. It is concluded that the phase criterion can distinguish the fault characteristics correctly. The proposed technique is simple and reliable. EMTP simulation and actual recording data show that the phase criterion is correct and valid.