基于电压谐波信号分析的单相自适应重合闸

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。经研究提出了一种新型的区分输电线路单相瞬时性故障与永久性故障的方法。当故障发生时，对于不同的故障性质（瞬时性故障或永久性故障），重合闸安装处母线的电压信号在不同时刻所蕴含的谐皮分量有所不同。根据对故障电弧电压信号的具体分析，提出了判别故障性质的奇次谐波能量判据，该判据适用于发生金属性故障或经过渡电阻故障时判故障性质。通过EMTP软件中的TACS功能对电弧故障的大量仿真，验证了该算法的有效性和准确性。且该判据仅利用了电压信号，所以基于此判据的单相自适应合闸是易于实现的。

STUDY ON SINGLE-POLE ADAPTIVE RECLOSURE BASED ON ANALYSIS OF VOLTAGE HARMONIC SIGNAL

Adaptive single-pole auto-reclosure possessesmany advantages that a lot of conventional reclosing does not have. On the basis of detailed research a new method isproposed which can distinguish the temporary faults frompermanent faults in transmission lines. When fault occurs, in the light of the different fault characteristics (temporary fault or permanent fault), the harmonic component implicated in the voltage signals at the busbar where the autoreclosure device is installed varies with time. According to the analysis of the arc voltage signals a criterion based on the energy of oddharmonics is put forward for the judgment of the type of fault. This criterion is suitable to judge the fault characteristics when ordinary or high impedance fault occurs. The results ofsimulation of arcing fault by the TACS in EMTP show that the correctness and effectiveness of this criterion is verified.Besides, only voltage signals of the faulty phase are used in this criterion, so with this criterion the adaptive single-pole reclosure can be easily implemented.