广东电力2018，Vol.31Issue(6)：139-146,8.DOI:10.3969/j.issn.1007-290X.2018.006.021
利用电容主动放电脉冲的直流配电网故障选线方法
Faulted Line Selection Method for DC Power Distribution Network by Using Active Capacitance Discharge Pulse
摘要
Abstract
In order to improve power supply reliability of the flexible DC power distribution network and keep the DC line running with fault as monopolar grounding fault happens,this paper analyzes monopolar short-circuit fault paths of voltage-sourced converter (VSC)and modular multilevel converter (MMC)under small current grounding mode,calculates and veri-fies change features of transient faulted current. Thus,it proposes an active faulted line selection method of using the two-level VSC DC capacitor to control transient discharge pulse during the monopolar fault. This method can realize active faul-ted line selection without adding external signal injection equipment,especially suitable for flexible DC power distribution networks with complex structure,multiple branch lines and short line length. Finally,it builds a simulation model for typical flexible DC power distribution network in PSCAD／EMTDC. The result indicates the proposed method can accurately realize monopolar short-circuit faulted line selection for the flexible DC power distribution network.关键词
直流配电网/直流单极接地/高阻接地/故障选线/主动式脉冲Key words
DC power distribution network/DC monopolar grounding/high resistance grounding/faulted line se-lection/active pulse分类
信息技术与安全科学引用本文复制引用
谈竹奎,徐玉韬,吕黔苏,肖永,刘斌..利用电容主动放电脉冲的直流配电网故障选线方法[J].广东电力,2018,31(6):139-146,8.基金项目
中国南方电网有限责任公司科技项目(GZKJQQ00000417) （GZKJQQ00000417）
