摘要
宁东-山东±660 kV直流输电示范工程是世界首条±660 kV电压等级直流输电工程,结合工程实际,在详细介绍试验条件的基础上,对各种工况下的带电作业安全距离进行试验研究,并根据不同作业位置安全距离的放电特性,结合线路相地过电压倍数,计算得到海拔2 000 m以下地区±660 kV直流输电线路带电作业最小安全距离和最小组合间隙。所得研究结论可为±660 kV直流输电线路上开展带电作业提供依据和技术支撑。
The ±660 kV DC power transmission pilot project from Ningdong to Shandong is the first ±660 kV DC power transmission project in the world. Based on the engineering practice of this project, detailed experimental conditions for the research are determined, and experimental research on the safety distance for live-line working of ±660 kV DC power transmission line under various operating conditions is performed. On the basis of experiments, firstly, the overvoltage multiple occurred in ±660 kV DC power transmission line is determined by theoretical calculation; secondly, according to discharge characteristics of safety distances for various positions where the live-line working is carried out and considering the calculated overvoltage multiple, the minimum safety distance and minimum combined spacing, via which the operators enter into the equipotential working position, for ±660 kV DC power transmission line located at the area with the altitude lower than 2 000 m are calculated. Results of this research can offer reference and technical support for live-line working carried out on ±660 kV DC power transmission.
出处
《电网技术》
EI
CSCD
北大核心
2011年第11期183-189,共7页
Power System Technology
