基于模块级联技术的混合型高压直流断路器研究-中国电机工程学报.pdf

第37 卷 第5 期 中 国 电 机 工 程 学 报 Vol.37 No.5 Mar. 5, 2017 1560 2017 年3 月5 日 Proceedings of the CSEE ©2017 Chin.Soc.for Elec.Eng. DOI ：10.13334/j.0258-8013.pcsee.152715 文章编号：0258-8013 (2017) 05-1560-08 中图分类号：TM56 基于模块级联技术的混合型高压直流断路器研究 1 2 1 1 朱晋 ，刘单华 ，尹靖元 ，韦统振 (1．中国科学院电工研究所，北京市 海淀区 100190 ；2．中国科学院大学，北京市 海淀区 100190) Research on Hybrid DC Breaker Based on Modular Cascaded Structure 1 2 1 1 ZHU Jin , LIU Danhua , YIN Jingyuan , WEI Tongzhen (1. The Institute of Electrical Engineering (Chinese Academy of Sciences), Hiandian District, Beijing 100190, China; 2. University of Chinese Academy of Sciences, Haidian District, Beijing 100190, China) ABSTRACT: The high voltage DC breaker is considered as 然而，直流电网技术的应用目前还存在尚待突 one of core devices of DC grid. This paper proposed a new 破的难题。例如直流系统的阻尼较低，与交流系统相 hybrid DC breaker topology based on module cascaded 比，直流系统的控制保护难度更大。并且对基于全控 structure and comparative ，Analysis between the proposed topology and the existing topologies was given. The 型半导体器件的柔性直流输电系统而言，器件耐受过 proposed topology has unique advantages in several aspects 电流的能力较弱，故障电流可能在数毫秒内超过器件 such as breaking speed, cost and reducing the engineering 的最高耐受值，使关键器件乃至整个换流站损毁。因 implementation difficulty. This paper described the working 此有必要快速限制并切断故障电流，以维持直流电网 principle of this topology in details. The simulation verified the effectiveness of the proposed new hybrid DC breaker topology. 安全稳定运行并保护电网中的关键设备。高压直流断 路器成为有效甚至唯一的技术手段[5-7] 。由于直流电 KEY WORDS: DC grid; DC