电网技术2017，Vol.41Issue(7)：2353-2362,中插10-中插11,12.DOI:10.13335/j.1000-3673.pst.2016.2830
柔性直流配电网接地方式对故障特性的影响分析
Effects of Grounding Mode on Fault Characteristics in Flexible DC Distribution System
摘要
Abstract
Effect of grounding modes on fault characteristic of flexible DC distribution system (FDCDS) was investigated with both theoretic analysis and simulation. Firstly, FDCDS architecture was presented, and grounding mode of DC side capacitors was determined. Theory about unbalanced voltage recovery was presented, used as theoretical basis for subsequent analysis. Impact of grounding modes of transformer on fault characteristics of AC-side single-phase fault was studied. Then, its effect on DC-side pole-to-ground fault was analyzed, and fault characteristic for different fault resistances was discussed. Unlike analytic methods used in VSC-HVDC projects, in order to improve power supply reliability in FDCDS, IGBT block was not applied in fault analysis of DC-side pole-to-ground faults. Finally, methods of ensuring IGBT work under unblocked condition were discussed. Results show that system grounding mode has a great influence on fault characteristics and restoration procedure. It also provides reference for selecting grounding modes and deciding protection configuration.关键词
柔性直流配电网/接地方式/故障分析/交流侧不对称故障/单极接地故障Key words
flexible DC distribution system/grounding mode/fault analysis/AC-side asymmetric fault/pole-to-ground fault分类
信息技术与安全科学引用本文复制引用
戴志辉,葛红波,严思齐,焦彦军,陈曦..柔性直流配电网接地方式对故障特性的影响分析[J].电网技术,2017,41(7):2353-2362,中插10-中插11,12.基金项目
国家重点研发计划专项课题(2016YFB0900203) （2016YFB0900203）
国家自然科学基金项目(51307059) （51307059）
河北省自然科学基金项目(E2014502065).Project Supported by National Key Research and Development Program (2016YFB0900203) （E2014502065）
National Natural Science Foundation of China (51307059) （51307059）
Natural Science Foundation of Hebei Province (E2014502065). （E2014502065）
