超导故障限流器接入电网后单相接地短路距离保护整定的改进措施  

Improved Distance Protection Setting Method for the Single-Phase Ground Fault with Grid-Connected SFCL

作　　者：刘宾[1,2] 梅军[1,2] 郑建勇[1,2] 姚磊[1,2] 

机构地区：[1]东南大学电气工程学院,南京210096 [2]东南大学苏州研究院,江苏苏州215123

出　　处：《华东电力》2012年第5期793-798,共6页East China Electric Power

基　　金：江苏省科技支撑计划--工业部分(BE2009053);江苏省产学研前瞻性联合研究项目(BY2011157);东南大学重大科学研究引导基金(2011seuzd09)~~

摘　　要：当电力系统发生单相接地短路时,超导故障限流器的接入会对其继电保护尤其是距离保护产生很大影响,以电阻型超导故障限流器接入电网为例,首先分析系统发生单相接地短路时限流器的接入对接地距离保护的影响,然后提出一种新的距离保护整定方法,最后采用PSCAD/EMTDC软件搭建模型仿真分析,结果表明在新的整定方式下,测量阻抗误差大大降低,超导故障限流器可以与线路距离保护正确地配合使用。The access of SFCL （ superconducting fauh current limiter） in the power system will have significant impact on its relay protection, especially on the distance protection in case of the single-phase ground fault. In this paper, the resistive SFCL connected to the grid exemplified how SFCL influenced the ground distance protection when single-phase ground short circuit occurred, then an improved setting method of distance protection for the SFCL-equipped line is proposed. Finally, a power system model is built to simulate and analyze the method by using PSCAD / EMT- DC simulation software. The results show that in the new setting mode, impedance measurement error is greatly reduced; therefore, SFCL and line distance protection can work in coordination with each other properly.

关 键 词：超导故障限流器 距离保护 整定 PSCAD 

分 类 号：TM471[电气工程—电器] TM26[一般工业技术—材料科学与工程]