文章摘要
索南加乐,顾嘉,薛晓辉,刘东,焦在滨.基于工频量补偿算法的长线距离保护[J].电力系统自动化,2007,31(23):57-60. DOI: .
SUONAN Jiale, GU Jia, XUE Xiaohui, LIU Dong, JIAO Zaibing.Distance Protection Based on Frequency-domain Compensation Algorithm[J].Automation of Electric Power Systems,2007,31(23):57-60. DOI: .
基于工频量补偿算法的长线距离保护
Distance Protection Based on Frequency-domain Compensation Algorithm
DOI:
关键词: 距离保护  补偿算法  工频  分布电容
KeyWords: distance protection  compensation algorithm  power frequency  distributed capacitance
上网日期:2007-12-03
基金项目:国家自然科学基金;国家十五重点科技攻关项目
作者单位
索南加乐,顾嘉,薛晓辉,刘东,焦在滨 西安交通大学电气工程学院陕西省西安市 710049 
摘要:
      特高压长线路的分布参数特性使传统距离保护的测量阻抗不与故障距离成正比,容易造成保护的超越或拒动。文中分析距离保护正确动作的条件:测距误差不大于故障距离与整定距离之差,提出将保护安装处的电流、电压补偿到距离Ⅰ段末端测距。仿真表明,该算法提高了距离Ⅰ段末端的测距精度,符合保护正确动作的条件,使保护正确动作。
Abstract:
      The distributing parameter characteristics of UHV long transmission line lead to the nonlinear relationship between the measured impedance of traditional distance protection and fault distance, which may cause exceeding-to-trip or failure-to-trip problems on distance protection. According to the authors' analysis, the condition for correct action of distance protection is that the error of fault location be no greater than the difference between fault distance and setting distance. It is proposed that the voltage and current at the measuring point be compensated to the terminal of distance section to locate the fault. Simulation results show that this new method can improve the measuring accuracy of the terminal of distance section, which meets the condition for correct action of distance protection, and makes the protection act correctly.
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