Induced overvoltage while ±500 kV pole line and neutral line using common-tower

被引：0
|
作者：
Chen, Shuiming [1 ]
Xie, Haibin [2 ]
Tu, Youping [2 ]
Zeng, Rong [1 ]
Ding, Lijian [2 ]
Fan, Lingmeng [3 ]
机构：
[1] State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments, Tsinghua University
[2] Ningxia Electric Power Corporation
[3] Extra High Voltage Power Transmission Company, China Southern Power Grid Co. Ltd.
来源：
Gaodianya Jishu/High Voltage Engineering | 2012年 / 38卷 / 05期
关键词：
±500; kV; Common-tower; High voltage direct current (HVDC); Induced overvoltage; Lightning protection; Neutral line;
D O I：
10.3969/j.issn.1003-6520.2012.05.024
中图分类号：
学科分类号：
摘要：
Combined with the actual situation that bipolar block comes from lightning on DC pole line on one ±500 kV HVDC project in China Southern Power Grid, the recurrence was given by electromagnetic transient analysis software EMTDC/PSCAD. We researched and analyzed that the neutral line in common-tower caused the induced over-voltage and insulation flashover, leading to DC system bipolar block, when HVDC pole line was hit by lightning in the DC system. The results show that, in the common-tower with the pole line and neutral line, due to the big insulation difference, when HVDC pole line is hit by lightning, the neutral line on the common-tower will produce very high induced over-voltage and lightning wave propagation process, and the induced voltage of the neutral line has a cumulative effect to reach its insulation levels many times, thus, multi point flashover occurred in the insulation of neutral line. The results of this study on the common-tower with different voltage grade line are of significance to the design.
引用
收藏
页码：1186 / 1191
页数：5
相关论文
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