高电压技术2018，Vol.44Issue(2)：440-447,8.DOI:10.13336/j.1003-6520.hve.20180131014
基于单端量的柔性直流电网故障识别方案
Single-ended Fast Fault Detection Scheme for MMC-based HVDC
摘要
Abstract
The fast and reliable identification of direct current (DC) transmission line faults is one of the key technologies for the development of large capacity and high voltage flexible DC grid.So we proposed a single-ended fault detection scheme by analyzing voltage variation of the current limiting reactor after the DC line fault in MMC-base HVDC.In this scheme,the low voltage is used as the starting criterion,the fault zone is determined by the magnitude and polarity of the voltage change rate of the current limiting reactor,and the fault pole is confirmed through using zero sequence fault component.A Zhangbei test system is built in PSCAD,which considers the influence of hybrid DC circuit breakers,transition resistance,current limiting reactor,and arm reactor.The simulation results demonstrate that the proposed protection scheme can identify the fault quickly and accurately in all cases without communication,high sampling frequency,and sophisticated data analyses.The scheme can satisfy the protection requirements of MMC-HVDC.关键词
柔性直流电网/故障识别/模块化多电平换流器/线路保护/直流断路器/故障极判别Key words
flexible DC grid/fault identification/modular multilevel converter (MMC)/transmission line protection/DC breaker/faulty pole identification引用本文复制引用
余修勇,肖立业,林良真,邱清泉,张志丰..基于单端量的柔性直流电网故障识别方案[J].高电压技术,2018,44(2):440-447,8.基金项目
中国科学院前沿科学重点研究项目(QYZDJ-SSW-JSC025):国家重点基础研究发展计划(973计划)(2015CB251005) （QYZDJ-SSW-JSC025）
国家自然科学基金(51577179).Project supported by Key Program of the Chinese Academy of Sciences (QYZDJ-SSW-JSC025),National Key Basic Research Program of China (973 Program) (2015CB251005),National Natural Science Foundation of China (51577179). （51577179）
