电力系统及其自动化学报2026，Vol.38Issue(8)：77-90,14.DOI:10.19635/j.cnki.csu-epsa.001750
有源配电网保护整定方法及分布式电源准入容量分析
Protection Setting Method for Active Distribution Networks and Analysis of Distributed Generation Penetration Capacity
摘要
Abstract
To address the issues of failure to operate or maloperation of traditional three-stage overcurrent protection in distribution networks which are caused by the integration of inverter-interfaced distributed generators represented by photovoltaic sources,a protection setting method for active distribution networks is proposed in this paper,and an analy-sis of the corresponding distributed generation penetration capacity is also performed.First,considering the influences of phase-to-phase short-circuit fault types,fault locations and operation modes,the variation patterns of fault current se-quence components,fault phase current and phase-to-phase current in the fault phase under phase-to-phase short-cir-cuit faults in active distribution networks are analyzed.On this basis,an effective simplification method aggregating mul-tiple distributed generators on the same line is adopted to comprehensively incorporate the output current from distribut-ed generators and their grid-connection locations into the protection setting.In addition,combined with the traditional three-stage overcurrent protection setting methodology,a current protection setting method for active distribution net-works based on phase-to-phase current in the fault phase is put forward.Furthermore,with the combination of selectivity and sensitivity constraints on the protection,the calculation methods for the penetration capacity of distributed genera-tors which locate upstream of the protection,within the protection zone and downstream of the protection are given,re-spectively.Modeling and fault simulation of active distribution networks conducted in PSCAD/EMTDC verify the correct-ness of the fault characteristic analysis results,as well as the effectiveness of the proposed protection setting method.关键词
逆变型分布式电源/配电网/故障特性/故障相相间电流/电流保护整定/准入容量Key words
inverter-interfaced distributed generator/distribution network/fault characteristic/phase-to-phase current in fault phase/current protection setting/penetration capacity分类
信息技术与安全科学引用本文复制引用
陈晓龙,郑郅彦,李永丽,王鸿,梁伟宸,李烜..有源配电网保护整定方法及分布式电源准入容量分析[J].电力系统及其自动化学报,2026,38(8):77-90,14.基金项目
国家重点研发计划资助项目(2022YFE0208800).国网冀北电力有限公司科技项目(B3018K24009). （2022YFE0208800）
