摘要
高压直流输电技术在电力系统中得到了越来越多的关注和应用,并逐步成为跨区输电的重要骨干网架。对长距离直流输电线路典型短路/接地故障进行分析研究,提出故障的识别及定位方法。采用兆欧表对故障类型进行定性,针对不同类型故障分别采用不同接线方法对故障位置进行估算,利用挂接地线配合估算的故障位置判断短路/接地故障点的相对位置,在故障标段内采用分段摇绝缘快速判断线路故障点。该定位方法在±800 k V宾金直流输电线路短路/接地故障定位排查中发挥了高效的作用。
High- voltage direct current（ HVDC） transmission technology has got more and more attention and application in power system,and gradually becomes an important backbone of interregional transmission grids. The typical short- circuit /grounding faults of long- distance HVDC transmission line are investigated,and fault recognition and location methods are put forward. Megger is used to qualitatively analyze the fault types. The locations of different type fault are estimated according to different wiring methods. Based on the estimated value of fault location,the relative fault location is judged by hanging ground line,and the precise fault location is obtained by sectional measure insulation. The location method is successfully used in± 800 k V Bin- Jin DC transmission line for positioning faults.
出处
《四川电力技术》
2015年第5期25-28,共4页
Sichuan Electric Power Technology
关键词
直流输电线路
短路/接地故障
故障定位
HVDC transmission line
short-circuit / grounding fault
fault location
