摘要
光纤复合架空地线(OPGW)兼具防雷和通讯的功能,在各电压等级输电线路中得到了广泛应用。750 kV输电线路输送容量大、负荷电流水平高,OPGW若采用逐基接地的方式将产生较大的环路电流损耗。为此,采用ATP/EMTP建模对750 kV输电线OPGW上的感应电压和电流进行仿真计算,研究比较了OPGW逐基接地、分段绝缘和换位接地等3种不同接地方式下的环流损耗;为验证计算结果,对OPGW的上的感应电压和电流进行了现场测量。研究表明:测量结果与仿真计算结果一致性较好;提出的OPGW换位接地的方式可大幅降低OPGW上的环流损耗,可作为今后设计的参考。
On transmission line,OPGW is usually grounded at every tower.With a larger capacity and higher level of load current than 500 kV and lower voltage class transmission line,the 750 kV AC transmission line has a great loop current which will bring about great OPGW grounding losses if it is grounded at every tower.Consequently,the induced voltage and current on the OPGW of 750 kV AC transmission line were simulated and calculated by ATP/EMTP modeling,and three different OPGW grounding modes were comparatively studied.Moreover,the induced voltage and current were on-spot measured.The measurement results are well in agreement with calculation results,and the transposition grounding mode can greatly reduce the grounding loss of OPGW and can be a reference for the design transmission line.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2011年第2期497-504,共8页
High Voltage Engineering
基金
国家电网公司科技项目(SGKJJSKF[2008]505)~~
