【作者】 高超； 郑涛； 毕天姝； 杜丁香；

【Author】 GAO Chao;ZHENG Tao;BI Tian-shu;DU Ding-xiang;State Key Lab of Alternate Electrical Power System with Renewable Sources,North China Electric Power University;Chinese Electric Power Research Institute;

【机构】 新能源电力系统国家重点实验室(华北电力大学)； 中国电力科学研究院；

【摘要】 通过理论分析得到特高压多串补系统在不同故障类型及不同故障位置发生电流反向的条件。文章针对我国晋东南-南阳-荆门特高压输电线路,建立含多段串补的模型,推导了在不同位置发生不同类型短路故障时的解析表达式,系统分析了在本线路和相邻线路发生对称、不对称故障时的电流特性,给出了特高压多串补系统发生电流反向的新结论,为分析特高压系统继电保护动作行为提供了依据。文章利用PSCAD搭建特高压输电线路模型并进行了仿真验证,仿真结果与理论分析一致。更多还原

【Abstract】 The conditions of current reversal in UHV transmission line with multi series compensation under different fault conditions are theoretically analyzed. Basing on Jindongnan- Nanyang- Jingmen UHV transmission line,a multi series compensation system model is established.And then,the analysis formula of current when different faults occur at different place is deduced.This paper analyses current characteristics when the local line and the adjacent line occur symmetry or asymmetry fault.The new current reverse conclusion of UHV with multi series compensation capacitors system is proposed, which is helpful for the analysis of relay performance adopted in the UHV power system.The simulation of 1000 k V transmission line with multi series compensation capacitors based on PSCAD is performed and simulation results conform to that of theoretical analysis.更多还原