安装故障限流器的输电线路潜供电弧特性与单相重合闸策略  

Secondary Arc Characteristics and Single-phase Autoreclosure Scheme of EHV Transmission Line With Fault Current Limiter

作　　者：刘洪顺[1] 李庆民[1] 邹亮[1] 娄杰[1] 

机构地区：[1]山东大学电气工程学院,山东省济南市250061

出　　处：《中国电机工程学报》2008年第31期62-67,共6页Proceedings of the CSEE

基　　金：山东省自然科学基金项目(Q2004F03);山东省中青年科学家基金资助项目(2005BS01011)。

摘　　要：针对安装氧化锌避雷器式故障限流器的500kV输电系统,利用电磁暂态计算程序分析了限流器旁路开关不同断开时间和不同弧道电阻对潜供电流特性的影响。基于等效阻抗网络和拉普拉斯变换方法,分析了潜供电流自然振荡频率与衰减系数的变化情况,从理论上解释了潜供电流低频分量的产生机理。提出了氧化锌避雷器式故障限流器与单相自动重合闸的时序配合策略,并进行了仿真验证。仿真结果表明,该策略可有效消除可能的潜供电流低频分量对单相自动重合闸的不利影响,既能确保自动重合闸操作的正常时序,又能兼顾故障限流器的自恢复特性。With regard to a 500 kV long-distance transmission line installed with zinc oxide surge arrester （MOA） based FCL （fault current limiter）, the influence of both the FCL bypass switch operation and the different arc resistances on the characteristics of the secondary arc current was analyzed by EMTP （electromagnetic transients program） simulations. The decay factor and the oscillation frequency of the secondary arc current were computed based on the equivalent impedance network and Laplace transformation, with a view to elucidating the nature of the low frequency behavior of the secondary arc current. A time sequence coordination scheme between the single-phase autoreclosure （SPAR） and the FCL operation was proposed and verified concretely by simulations. Simulation results show that the proposed scheme can effectively eliminate the side impact caused by the low frequency current components on the SPAR, and the scheme can guarantee the normal operational sequence of a SPAR as well as the self-restoration of a FCL.

关 键 词：故障限流器 氧化锌避雷器 单相自动重合闸 潜供电流 

分 类 号：TM762.2[电气工程—电力系统及自动化]