一种直流输电线路故障测距新原理  

A Novel Fault Location Principle for HVDC Transmission Line

作　　者：宋国兵[1] 周德生[1] 焦在滨[1] 索南加乐[1] 贠保记 

机构地区：[1]西安交通大学电气工程学院,陕西省西安市710049 [2]西安西瑞保护控制设备有限责任公司,陕西省西安市710075

出　　处：《电力系统自动化》2007年第24期57-61,共5页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50677051);国家科技攻关计划项目(2005BA208C)~~

摘　　要：提出了一种新的直流输电线路双端故障测距方法。该方法建立在分布参数模型基础上,利用两端电压、电流量分别从两端计算沿线电压分布,并根据所计算的沿线电压分布在故障点处相等进行故障定位。该定位方法在时域中进行,所需数据窗短,计算简单,定位精度高。在输电线路仿真模型的选择上考虑了线路参数的频变特性,PSCAD和换流站录波数据的仿真结果表明,该方法能够对直流输电线路实现快速准确的故障定位。This paper presents a novel fault location principle for HVDC transmission lines using two terminal data. Based on a distributed parameter model, the voltage distributions are calculated by the voltage and current measured in each terminal, respectively. And the fault can be located by the calculated voltage distributions. The algorithm performed in the time domain needs a very short data window and has satisfactory accuracy in practice. The effectiveness of the algorithm proposed is verified using the field data and the simulation data by the frequency-dependent line model in PSCAD. The results show that any fault of the HVDC transmission line can be located quickly and accurately.

关 键 词：直流输电线路 故障定位 分布参数 时域 双端电气量 

分 类 号：TM755[电气工程—电力系统及自动化]