基于串补线性化模型的含串补线路距离保护整定方法  

Distance protection setting method of series-compensated line based on series compensation linearized model

作　　者：黄宗超 王帆 刘一民 雷淇 李银红[1] HUANG Zongchao;WANG Fan;LIU Yimin;LEI Qi;LI Yinhong(State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science and Technology,Wuhan 430074,China;North China Branch of State Grid Corporation of China,Beijing 100000,China)

机构地区：[1]华中科技大学强电磁工程与新技术国家重点实验室,湖北武汉430074 [2]国家电网公司华北分部,北京100000

出　　处：《电力自动化设备》2019年第11期133-138,共6页Electric Power Automation Equipment

摘　　要：在含串联补偿装置(简称串补)线路的距离保护整定中,往往忽略金属氧化物非线性电阻(MOV)动作时串补对外呈现的非线性阻抗特性,这使得距离保护整定存在不准确、灵敏度低的不足。采用串补线性化模型描述串补MOV的影响,分析了含串补线路距离保护测量阻抗的分布特性,提出了一种基于串补线性化模型的距离保护整定方法,实现了含串补线路距离保护的精细化整定。采用某实际电网算例,验证了所提方法的有效性。仿真结果表明,该方法所得保护定值较传统整定方法具有更高的灵敏性。In the distance protection setting of series-compensated lines,the nonlinear impedance characteristics of the series compensation devices when the MOV(Metal Oxide Varistor)acts are often neglected,which causes inaccuracy and low sensitivity of distance protection setting.The series-compensated linearization model is used to describe the influence of series-compensated MOV.The distribution characteristics of the measured impedance of the distance protection of series-compensated lines are analyzed.A distance protection setting method based on the series-compensated linearization model is proposed,which realizes the refined setting of the distance protection of series-compensated lines.The effectiveness of the proposed method is verified by an actual power grid example.The simulative results show that the setting values obtained by the proposed method are more sensitive than those obtained by traditional setting methods.

关 键 词：串联补偿装置 线性化模型 距离保护整定 继电保护 灵敏性 

分 类 号：TM77[电气工程—电力系统及自动化]