Switching Overvoltage Research of ±500 kV Flexible HVDC Grid With Overhead Line

被引：0
作者：
Sun X. [1 ]
Chen S. [2 ]
Huang T. [2 ]
Lie X. [1 ]
Jiang W. [1 ]
Wu Y. [1 ]
Chen Y. [3 ]
机构：
[1] State Key Laboratory of Power Grid Safety and Energy Conservation, China Electric Power Research Institute, Haidian District, Beijing
[2] State Grid Fujian Electric Power Research Institute, Fuzhou, 350007, Fujian Province
[3] State Key Laboratory of HVDC, Electric Power Research Institute, China Southern Power Grid, Guangzhou, 510080, Guangdong Province
来源：
Sun, Xu (sunxu_bj@163.com) | 1600年 / Power System Technology Press卷 / 41期
关键词：
Flexible HVDC; MMC; Overhead line; Switching overvoltage; ±500; kV;
D O I：
10.13335/j.1000-3673.pst.2016.1943
中图分类号：
学科分类号：
摘要：
Firstly, this paper presents configuration, main device parameters, classic fault types and protection action sequences of ±500 kV flexible HVDC grid with overhead line. Secondly, key factors influencing its switching overvoltage are investigated. Rated voltage of DC break MOV is 550 kV with corresponding break overvoltage at 1.6 p.u.. Switching overvoltage at valve bottom and neutral line is higher for "C" chain structure, and at DC pole line is higher for "O" chain structure. Switching overvoltage in all positions is low for "O-C" chain structure and this configuration is advised in daily operation. Current limiting reactor valves can influence switching overvoltage at valve top and DC pole bus, but their main function is to limit DC fault currents. Finally, classic faults are simulated, and based on this, converter device protection level on ±500 kV flexible HVDC grid with overhead line is recommended. © 2017, Power System Technology Press. All right reserved.
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页码：1498 / 1502
页数：4
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