电力系统及其自动化学报2019，Vol.31Issue(10)：1-9,17,10.DOI:10.19635/j.cnki.csu-epsa.000177
识别模块化多电平直流线路故障的保护新原理
Novel Protection Principle for Identifying the Fault of Modular Multi-level DC Line
摘要
Abstract
To ensure the safe operation of high voltage direct current(HVDC)transmission system composed of modu-lar multi-level converters(MMCs),series inductors are added to the DC line in this paper. According to the results ob-tained using the fault analysis method,a novel protection principle is formulated by means of the fault component on both sides of the series inductors. This principle can identify the fault pole by using the polarity of the voltage fault com-ponent at the positive and negative poles of the HVDC line. Meanwhile,it can distinguish the internal or external fault according to the magnitude of the voltage fault component on both sides of the series inductors. At last,a simulation model of the MMC-HVDC system is established in PSCAD. In addition,various types of fault are simulated,and fault data are generated. The protection method is verified using Matlab,and simulation results show that the proposed pro-tection principle is correct.关键词
模块化多电平直流输电系统/故障分析/继电保护/电压极性/电压故障分量Key words
modular multi-level direct current transmission system/fault analysis/relay protection/voltage polarity/voltage fault component分类
信息技术与安全科学引用本文复制引用
高淑萍,胡振宇,张保会,宋国兵,牛丹..识别模块化多电平直流线路故障的保护新原理[J].电力系统及其自动化学报,2019,31(10):1-9,17,10.基金项目
国家自然科学基金联合基金重点资助项目(U1766209) （U1766209）
国家自然科学基金资助项目(51777166) （51777166）
