基于形态学梯度与FBC的HVDC输电网故障处理方法  

Fault Processing Method of HVDC Transmission Network Based on Morphological Gradient and FBC

作　　者：刘洪亮 杨俊 韩舒 司鑫尧 Liu Hongliang;Yang Jun;Han Shu;Si Xinyao(Nanjing Yuanneng Power Engineering Co.,Ltd.,Nanjing Jiangsu 210000,China;State Grid Jiangsu Electric Power Co.,Ltd.,Research Institute,Nanjing Jiangsu 210003,China)

机构地区：[1]南京远能电力工程有限公司,江苏南京210000 [2]国网江苏省电力有限公司电力科学研究院,江苏南京211103

出　　处：《电气自动化》2023年第5期16-19,共4页Electrical Automation

基　　金：国家重点研发计划项目(2018YFB0904700)。

摘　　要：针对高压直流(high voltage direct current,HVDC)输电网直流故障处理中存在的耗时长且影响范围较广等问题,提出了基于形态学梯度与故障阻断换流器(fault blocking converter,FBC)的HVDC输电网故障处理方法。首先,利用多分辨形态学梯度算法提取故障电流信号特征,并进行滤波处理以消除噪音干扰;然后,设计了基于FBC的HVDC直流网故障处理策略,结合FBC与高速开关实现快速且有选择性地处理直流故障;最后,利用PSCAD模拟HVDC输电网直流故障。试验结果表明,所提方法的故障处理耗时仅为10 ms,准确率高达95%,能够高效且准确地处理故障。Aiming at the problems of long time-consuming and wide influence range in DC fault treatment of high voltage direct current(HVDC) transmission network,a fault treatment method of HVDC transmission network based on morphological gradient and fault blocking converter(FBC) was proposed.Firstly,the characteristics of fault current signal were extracted by multi-resolution morphological gradient algorithm,and filtered to eliminate noise interference;then,the fault handling strategy of HVDC DC network based on FBC was designed,which combined FBC and high-speed switch to deal with DC faults quickly and selectively;finally,PSCAD was used to simulate the DC fault of HVDC transmission network.The experimental results show that the fault processing time of proposed method is only 10 ms,and the accuracy is as high as 95%.It can handle faults efficiently and accurately.

关 键 词：故障阻断换流器 形态学梯度 直流故障 高速开关 高压直流输电网 

分 类 号：TM711[电气工程—电力系统及自动化]