电力系统自动化2017，Vol.41Issue(12)：93-99,7.DOI:10.7500/AEPS20161229015
含逆变型分布式电源的配电网正序阻抗纵联保护
Pilot Protection of Positive Sequence Impedance for Distribution Network with Inverter-based Distributed Generator
摘要
Abstract
The fault characteristics of the inverter-based distributed generator (IBDG) differ from those of traditional resources, which makes it difficult for traditional current relay to clear fault fast and reliably.Also affected is the action performance of the existing transmission line protection principle directly used in distribution network with IBDG.By drawing on current differential protection for reference, the amplitudes of the defined positive sequence differential impedance for the internal and external fault are analyzed, and a novel positive sequence differential impedance protection principle is proposed to account for the impedance amplitude difference.To further improve the performance, an operation criterion with braking characteristic is constructed to overcome the adverse effects of load branch.An auxiliary criterion based on the amplitude of positive sequence impedance and current is formulated for internal three-phase short circuit faults without transition resistance.Compared with the traditional current differential protection, the proposed protection strategy has no need for synchronized measurement.The feasibility of protection scheme is verified by simulation results.关键词
正序阻抗/差动保护/制动特性/逆变型分布式电源/配电网Key words
positive sequence impedance/differential protection/braking characteristic/inverter-based distributed generator (IBDG)/distribution network引用本文复制引用
徐萌,邹贵彬,高磊,马玉伟..含逆变型分布式电源的配电网正序阻抗纵联保护[J].电力系统自动化,2017,41(12):93-99,7.基金项目
国家高技术研究发展计划(863计划)资助项目(2012AA050213) （863计划）
山东省重点研发计划资助项目(2015GGX101011).This work is supported by National High Technology Research and Development Program of China (863 Program) (No.2012AA050213) and Shandong Province Key Plan of Research and Development (No.2015GGX101011). （2015GGX101011）
