直流线路行波保护特征量动态特性与整定研究  

Dynamic Characteristics of Characteristic Parameters of Traveling Wave Protection for HVDC Transmission Line and Their Setting

作　　者：韩昆仑[1] 蔡泽祥[1] 徐敏[1] 贺智[2] 

机构地区：[1]华南理工大学电力学院,广东省广州市510640 [2]中国南方电网超高压输电公司,广东省广州市510620

出　　处：《电网技术》2013年第1期255-260,共6页Power System Technology

基　　金：国家自然科学基金资助项目(51077055);高等学校博士学科点专项科研基金资助项目(20100172110031)~~

摘　　要：现有的高压直流输电线路行波保护整定计算缺乏统一适用的方法,保护可靠性有待提高。采用基于EMTDC仿真计算的手段分析了直流线路行波保护各特征量(电压变化率、电压变化量以及电流变化量)在不同种类故障条件下以及非故障扰动条件下的动态响应特点及规律,进而研究了直流线路行波保护各判据所具有的基本功能及其相互间的逻辑关系。在此基础上提出了各判据进行整定计算所需边界条件的确定原则,从而形成了直流输电线路行波保护整定计算的基本方法。基于实际高压直流输电线路参数的行波保护整定算例验证了该整定计算方法具有良好的可靠性和灵敏性。Due to lacking in a unified and applicable setting method, the reliability of existing traveling wave protection （TWP） for HVDC transmission line is to be improved. Dynamic response characteristics and regular pattern of characteristic parameters of TWP for HVDC transmission line, namely the rate of voltage change, the variation quantity of voltage and the variation quantity of current, under different kinds of faults are simulated by EMTDC-based simulation, furthermore basic functions possessed by criteria of TWP for HVDC transmission line as well as the logical relationship among them are researched. On this basis, the principle to determine the boundary conditions for the setting of the criteria are proposed, and then a basic method for the setting of TWP for HVDC transmission line is formed. Based on the parameters of actual HVDC transmission line, results of case study on the setting of TWP show that proposed setting method possesses good performance in reliability and sensitivity.

关 键 词：直流线路行波保护 特征量 保护判据 动态特性 整定计算 

分 类 号：TM773[电气工程—电力系统及自动化]