特高压直流输电线路保护研究综述  

A Summary of Protection Study of Extra-high Voltage DC Transmission Lines

作　　者：农惠中 杨东睿 张小平 朱鸿儒 凌艺榕 曾祥云 NONG Hui-zhong;YANG Dong-rui;ZHANG Xiao-ping;ZHU Hong-ru;LING Yi-rong;ZENG Xiang-yun(Bose Power Supply Bureau,Southern Grid Co.Ltd.,UHV Transimmision Compary,Baise 533000,China;Guangxi Beitou Information Science and Technology Investment Company,Nanning 530000,China;Liuzhou Power Supply Bureau,Southern Grid Co.Ltd.,HUV Transimmision Company,Liuzhou 545000,China)

机构地区：[1]南方电网有限责任公司超高压输电公司百色局,广西百色533000 [2]广西北投信创科技投资有限公司,广西南宁530000 [3]南方电网有限责任公司超高压输电公司柳州局,广西柳州545000

出　　处：《电气开关》2023年第5期1-5,共5页Electric Switchgear

摘　　要：文章对现阶段特高压直流输电线路保护进行分析研究。发现行波保护动作迅速,但是易受干扰、对采样频率要求高、对高阻接地故障不灵敏,还缺乏成熟的整定原则;微分欠压保护可靠性比行波保护高但是存在缺点与行波保护类似;纵联差动保护能检测出高阻接地故障但是对通讯要求较高而且受线路分布电容电流影响较大,响应速度较慢。针对上述问题文章对国内外特高压直流输电线路保护的研究进行了总结并对后续研究进行了展望。This paper focuses on the analysis and study on the protection of UHVDC transmission lines at the present stage.It is found that the traveling wave protection is fast,but the shortages lie on the susceptibility to interference,the demands to high sampling frequency,the insensitivity to high resistance ground fault and lack of mature setting principle.The reliability of differential undervoltage protection is higher than that of traveling wave protection,but the disadvantages are similar to those of traveling wave protection.Longitudinal differential protection can achieve the detection of high resistance ground fault.However,it has high requirement for communication and is greatly affected by the distributed capacitance current of the line,with low responding speed.In view of the above problems,this paper summarizes the research on UHVDC transmission line protection at home and abroad and gives prospects to the subsequent research.

关 键 词：特高压直流输电 行波保护 微分欠压保护 纵联差动保护 

分 类 号：TM72[电气工程—电力系统及自动化]