基于PRONY法的超高压线路单相自适应重合闸故障识别原理  

Identification of faults occurred on the extra high voltage transmission line based on PRONY method

作　　者：胡亚平[1] 吕飞鹏[1] 周鑫[1] 焦征南[1] 钟俊毅[2] 

机构地区：[1]四川大学电气信息学院,四川成都610065 [2]四川省电力公司超高压运行检修公司,四川成都610065

出　　处：《电力系统保护与控制》2010年第9期23-26,42,共5页Power System Protection and Control

摘　　要：针对带并联电抗器的超高压输电线路,瞬时性故障时断开相恢复电压中存在由于储能元件初始储能引起的自由分量,该自由分量幅值接近或高于其稳态基波分量的幅值,频率低于且接近于工频,分析了单相瞬时性故障恢复电压的拍频振荡特点,提出了基于PRONY法对恢复电压信号进行快速辩识,通过得到的各分量的振幅、频率等信息能判别瞬时性故障与永久性故障,从而实现线路单相自适合重合闸。大量仿真结果表明该方法的有效性和准确性。Aiming at EHV transmission lines with shunt reactors, because of the initial stored energy of shunt reactors, the recovery voltage of fault phase exists a free component, whose amplitude is close to or higher than steady component, whose frequency is lower and close to industrial frequency, when transient fault occurred, the study shows that in the case of single-phase transient fault, the character of its recovery voltage is different from permanent fault. A PRONY signal analytic method is developed to fleetly identify recovery voltage, then fault type can quickly be distinguished according to the swing and frequency of the different signals. The method is validated by a lot of simulation results.

关 键 词：超高压输电线路 并联电抗器 单相自适应重合闸 普罗尼法 恢复电压 瞬时性故障 

分 类 号：TM762.2[电气工程—电力系统及自动化]