雷击暂态全响应监测系统在直流输电线路故障诊断中的应用  

Application of Lightning Transient Full Response Monitoring System in Fault Diagnosis of DC Transmission Line

作　　者：冯万兴[1] 严碧武[1] 赵淳[1] 王韬[1] 窦宪鹤 裴浩威 

机构地区：[1]国网电力科学研究院武汉南瑞有限责任公司,武汉430074 [2]武汉三相电力科技有限公司,武汉430074

出　　处：《电瓷避雷器》2015年第6期142-147,共6页Insulators and Surge Arresters

摘　　要：运行中的输电线路极易遭受各种自然因素的影响而导致跳闸故障,严重威胁电力系统的安全运行与可靠供电,其中雷害是造成输电线路跳闸故障的最主要原因。因此,准确判断输电线路雷击故障,并找出其发生的具体位置,有助于维护人员及时发现故障并制定相应的针对性措施,对输电线路安全运行具有重要意义。以国家电网500 kV直流江城线雷击跳闸故障为例,介绍了雷击暂态全响应监测系统在故障定位和故障原因辨识中的应用。该系统采用分布式监测技术,依据行波电流进行精确定位,根据行波电流脉宽智能辨识故障原因,通过理论分析以及实际巡线结果论证了分布式故障监测系统的高效性、准确性。Tripping failure is very likely to occur on transmission line during its operation due to kinds of natural factors, which threaten the safe operation and reliable power supply of power system, while lightning is the main reason among all the factors. Therefore, it is very important for the maintenance personnel to find out the exact location of the transmission fine and make corresponding measures. Transmission line fault intelligent monitoring system is given introduction about fault location and identification by State grid corporation 500 kV dc line lightning tripping of the river. The system characterized in sectional traveling-wave current monitoring, which located interval by fault power- frequency current and accurate location by traveling wave and intelligently identified cause of fault by pulse width of traveling wave. Spot inspection compared diagnose of other system is quoted hereto demonstrate the efficiency and accuracy of the sectional traveling wave current monitoring.

关 键 词：跳闸故障 雷击 行波电流 原因辨识 故障定位 

分 类 号：TM863[电气工程—高电压与绝缘技术]