单端量行波保护在中压柔性直流配电网的适应性分析  

Adaptability analysis of single terminal traveling wave protection in mid-voltage DC distribution based on VSC

作　　者：陈福锋[1,2] 杨阳[3,4] 宋国兵[3] 王玉婷[1,2] 褚旭[3] 罗娟[3] 刘珮瑶 

机构地区：[1]国电南京自动化股份有限公司,江苏南京210032 [2]南京国电南自电网自动化有限公司,江苏南京211153 [3]西安交通大学电气学院,陕西西安710049 [4]国网苏州供电公司,江苏苏州215004

出　　处：《电力系统保护与控制》2016年第22期50-55,共6页Power System Protection and Control

基　　金：国家自然科学基金项目(No.51477131)~~

摘　　要：为了研究单端量行波保护原理在中压柔性直流配电网的适应性,首先通过对单端量行波保护的原理分析,得出其最佳应用条件。结合柔性直流配电线路的故障特征进行理论分析,从而得到行波保护在直流配电网中适应性的一般结论;然后搭建中压柔性直流配电网的电磁暂态模型并进行仿真,并与通过理论分析得到的结论进行了比较分析。研究结果表明,单端量行波保护能够适用于中压柔性直流配电线路的保护,且动作性能良好。仿真结果验证了理论分析的正确性。For studying the adaptability of single terminal traveling wave protection in mid-voltage DC distribution based on VSC（voltage sourced converter）, firstly the best working condition is obtained by analyzing the principle of singe terminal traveling wave protection, the general protection adaptability conclusion is reached by theoretical analysis based on the condition and the fault characteristics of DC distribution lines. Then, the electrical-magnetic model of DC distribution network is established and simulated, and the simulation results are compared with theoretical analysis results. The research shows that the single-terminal traveling wave protection can apply to VSC-based mid-voltage DC distribution line with good performance. The correctness of theoretical analysis is verified by simulation results.

关 键 词：直流配电 柔性直流 行波保护 故障特征 适应性分析 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM77