Review on DC Transmission Line Protection Technologies of HB-MMC Based DC Grids

被引：0
|
作者：
Huang Q. [1 ]
Zou G. [1 ]
Gao L. [2 ]
Sun C. [3 ]
机构：
[1] Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education, Shandong University, Jinan, 250061, Shandong Province
[2] Jinan Electric Power Corporation of State Grid Shandong Electric Power Corporation, Jinan, 250001, Shandong Province
[3] State Grid Hebei Electric Power Corporation, Shijiazhuang, 050021, Hebei Province
来源：
Dianwang Jishu/Power System Technology | 2018年 / 42卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Current limiting technology; DC circuit breakers; Fault characteristics; Flexible DC grids; Half bridge modular multilevel converters (HB-MMC); Protection principles;
D O I：
10.13335/j.1000-3673.pst.2017.2593
中图分类号：
学科分类号：
摘要：
Because of particularity of the control system and topological structure of flexible DC grids based on half bridge modular multilevel converters (HB-MMC), the fault current rises fast and its peak value is very high when a short-circuit fault happens in DC transmission line. As a result, the semiconductor devices of the converters face danger of easy destruction. In addition, the DC fault current has no natural zero-crossing point, increasing difficulty for DC circuit breaker to cut off fault current. Therefore it is a challenge for protection system to keep safety of DC grids. Based on the topological structure and DC side fault characteristics of flexible DC grids, this paper systematically analyzes recent research development of protection of flexible DC grids, including DC fault current limiting methods and DC side protection principles, emphasizing on protection principles of DC lines. This paper also discusses current main challenges of fault handling and protection technologies, and foresees future research direction. © 2018, Power System Technology Press. All right reserved.
引用
收藏
页码：2830 / 2840
页数：10
相关论文
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