Analysis on electrical parameters and electromagnetic transient of 1000 kV compact transmission line

被引：0

作者：

Wang, Xiaotong ^{[1
]}

Ban, Liangeng ^{[1
]}

Lin, Jiming ^{[1
]}

Xiang, Zutao ^{[1
]}

Zheng, Bin ^{[1
]}

机构：

[1] China Electric Power Research Institute, Haidian District, Beijing 100192, China

来源：

Dianwang Jishu/Power System Technology | 2012年 / 36卷 / 03期

关键词：

Metals - UHV power transmission - Electric network parameters - Electric surges - Electric grounding - Electrolysis - Electric reactors - Surge protection;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Electrical parameters, power frequency overvoltages, secondary-arc currents, switching surges and so on of inverse triangle arranged 1000 kV compact transmission lines are analyzed and compared with those of conventional types of transmission lines. Comparison results show that the compact transmission lines possess higher natural power and their electrical parameters are balanced better. To meet the demand on restricting power frequency overvoltage and secondary-arc current, it is necessary for compact transmission line to possess higher capacity of high voltage shunt reactor and larger reactance value of grounding reactor connected to the neutral. It is found in the research that the neutral voltage of high voltage shunt reactor for 1000 kV compact transmission lines is high, and in the calculation example of this paper it exceeds corresponding withstand voltage level in ultra high voltage (UHV) pilot project. For this reason, it is recommended to properly enhance the insulation level of the neutral of high voltage shunt reactor for 1000 kV compact transmission lines. Besides, in view of that the phase spacings of compact transmission lines are obviously less than those of conventional transmission lines, so it is necessary to check the inter-phase insulation level. If necessary, the four-star connection of metal oxide arresters (MOA) could be adopted to restrict the inter-phase switching surge of compact transmission lines.

引用

页码：9 / 14