南方电网技术2017，Vol.11Issue(1)：14-22,9.DOI:10.13648/j.cnki.issn1674-0629.2017.01.003
基于直流电压变化率的直流电网直流故障保护
DC Fault Protection Based on Change Rate of DC Voltage in DC Grid
摘要
Abstract
DC fault detection and DC fault isolation based on change rate of DC voltage in DC grid are studied.The principle of change rate of DC voltage is introduced.The influence factors on change rate of DC voltage are analyzed, including current limited reactor, fault location, fault type, fault resistance and measurement time constant.A four-terminal MMC-MTDC is established in PSCAD/EMTDC and setting values of direct current circuit breakers(DC CBs) are chosen.When change rate of DC voltage exceeds setting values, internal DC faults are judged and DC CBs receive the tripping singal to isolate the DC faults.The feasibility of the proposed protection method is proved by simulating pole-to-ground DC fault and pole-to-pole DC fault.关键词
直流断路器/电压变化率/直流电网/故障保护Key words
direct current circuit breaker (DC CB)/change rate of voltage/DC grid/fault protection分类
信息技术与安全科学引用本文复制引用
张峻榤,林卫星,文劲宇..基于直流电压变化率的直流电网直流故障保护[J].南方电网技术,2017,11(1):14-22,9.基金项目
国家重点研发计划(2016YFB0901002) （2016YFB0901002）
中国博士后科学基金资助项目(2015M580643).Supported by National Key Research and Development Program (2016YFB0901002) （2015M580643）
China Postdoctoral Science Foundation (2015M580643). （2015M580643）
