实用高压直流输电线路故障测距方法  

Practical Fault Location Method of HVDC Power Transmission Line

作　　者：翟永昌[1] 

机构地区：[1]中国南方电网超高压输电公司广州局,广州510405

出　　处：《电力系统及其自动化学报》2008年第5期70-73,共4页Proceedings of the CSU-EPSA

摘　　要：高压直流输电线路行波测距一般精度较高,但由于行波测距装置本身和行波测距的死区等原因,使得有些高压直流输电线路故障无法得到定位,针对现有高压直流输电线路行波测距的不足提出了单端、双端行波测距和常规量测距相结合的综合测距方法,依据现有的故障录波数据实现常规量测距。以500kV贵广直流工程为例,说明了行波测距失败的实际情况,并分析了其中的原因,验证了综合测距方案的有效性,并分析了故障行波波头检测部分、高压直流分压器和高压直流分流器的组成原理。The accuracy of travelling wave location method on HVDC （high voltage direct current） power transmission line is high. Some line fault could not be located at the same time because of the location equipment fault or travelling wave location method blind area. The integrative fault location plan which unites the single terminal, dual terminals travelling wave location method and traditional fault location method is put forward to fetch up the deficiency of the dual terminals travelling wave approach and realize the traditional fault location based on the data of transient fault recorder. The case of travelling wave fault location defeated has been enumerated in the 500 kV Gui-Guang HVDC project, and the causation is explained. The integrative fault location plan is validated in the HVDC project. The structure of the defecting fault travelling wave head parts, the current transformer and the voltage transformer in HVDC project is analyzed.

关 键 词：高压直流输电 行波测距 故障录波 小波 

分 类 号：TM8[电气工程—高电压与绝缘技术]