中国电机工程学报2023，Vol.43Issue(24)：9509-9522,中插11,15.DOI:10.13334/j.0258-8013.pcsee.220991
基于控保结合的适配孤岛场景单相接地故障的新型距离保护方案
A Novel Distance Protection Scheme for Island Grid Based on Control Combined With Protection Under Single-phase Ground Fault
摘要
Abstract
Affected by the control strategy of inverter-interfaced generators,the performance of existing methods for improving anti-transition resistance capabilities in traditional grids deteriorate under island grid.This article first introduces the operating mode and traditional control strategy of inverter-interfaced generators during fault period.Based on that,a novel negative sequence voltage suppression strategy is proposed.Combinend with the traditional negative sequence current suppression strategy,the control strategy realized the open circuit in negative sequence branch on the side of the new energy station and the short circuit in negative sequence branch on the side of the storage station bus during the fault.Furthermore,based on the negative sequence in the composite sequence network,solution of fault distance under single-phase ground fault is proposed under single-phase ground fault.Based on the PSCAD/EMTDC,the simulation results show that the scheme has a high measurement accuracy of calculating fault distance,which greatly enhances the anti-transition resistance capabilities of distance protection under single phase ground fault.关键词
控保结合/距离保护/抗过渡电阻/孤岛电网/逆变电源/负序电流抑制/负序电压抑制Key words
control combined with protection/distance protection/anti-transition resistance/island grid/inverter-interfaced generator/negative sequence current suppression/negative sequence voltage suppression分类
信息技术与安全科学引用本文复制引用
黎钊,吴宇奇,郑宇超,肖澍昱,魏繁荣,李正天,林湘宁..基于控保结合的适配孤岛场景单相接地故障的新型距离保护方案[J].中国电机工程学报,2023,43(24):9509-9522,中插11,15.基金项目
国家电网公司总部科技项目(5100-202140339A-0-0-00).Project Supported by Key Technology Project of State Grid Corporation of China(5100-202140339A-0-0-00). （5100-202140339A-0-0-00）
