中国电机工程学报2016，Vol.36Issue(21)：5741-5749,9.DOI:10.13334/j.0258-8013.pcsee.160099
基于边界特性的多端柔性直流配电系统单端量保护方案
Single-ended Protection Scheme Based on Boundary Characteristic for the Multi-terminal VSC-based DC Distribution System
摘要
Abstract
Several technical difficulties are still confronting us when it comes to the multi-terminal flexible DC distribution system, among which is the DC fault identification. The protection principles for the AC system and conventional DC transmission system are not applicable to the multi-terminal flexible DC distribution system. Thus the paper designed a novel DC line protection scheme. Based on the boundary characteristic, it extracted the transient characteristic difference between the internal fault and external fault to realize the fault identification. And the directionality of the protection was achieved by the DC-reactor voltage-drop criteria. The proposed scheme could identify the internal fault and external fault quickly without communication, which could satisfy the speed, reliability and selectivity requirement of the DC distribution system. Corresponding simulation cases were carried out to verify the feasibility and superiority of the proposed scheme.关键词
多端柔性直流配电系统/故障识别/小波变换/暂态能量Key words
multi-terminal flexible DC distribution system/fault identification/wavelet transform/transient energy分类
信息技术与安全科学引用本文复制引用
李斌,何佳伟,李晔,欧逸哲..基于边界特性的多端柔性直流配电系统单端量保护方案[J].中国电机工程学报,2016,36(21):5741-5749,9.基金项目
国家高技术研究发展计划(863计划)项目资助(2015AA050101)。Project Supported by the National High Technology Research and Development Program of China 863 Program (2015AA050101) （863计划）
