电力系统保护与控制2025，Vol.53Issue(15)：103-112,10.DOI:10.19783/j.cnki.pspc.241442
含高比例新能源配电网的改进重合闸方案
An improved reclosing scheme for active distribution networks with high proportion of new energy
摘要
Abstract
To address the issue of automatic reclosing failure caused by continuous current injection to the fault point during low voltage ride-through(LVRT)operation of inverter-interfaced distributed generation(IIDG),an improved reclosing scheme for actively isolating the IIDG and the fault point is proposed.The impact of IIDG's LVRT operation strategy on automatic reclosing is analyzed.Circuit breakers are equipped with appropriate harmonic current protection,while the necessary condition for reclosing failure due to LVRT operation is used as the triggering condition for IIDG to inject harmonic current.On this basis,IIDG injects harmonic current when the starting criterion is met,and the harmonic current protection opens the circuit breaker between the IIDG and the fault point,thereby stopping the IIDG from injecting current into the fault point.As a result,the fault point self-extinguishes the arc and automatic reclosing succeeds.This method does not require the installation of a voltage absence detection device or extending the reclosing time,nor does it rely on a communication network.It has good adaptability in scenarios with a high proportion of new energy.Simulation results verify the effectiveness of the proposed method.关键词
重合闸/逆变型分布式电源/谐波电流保护/有源配电网/低电压穿越Key words
reclosing/inverter distributed power generation/harmonic current protection/active distribution network/low voltage ride-through(LVRT)引用本文复制引用
戴志辉,张宇,吴桐,许东瑞,柳梅元,李恒泽,石浚阳..含高比例新能源配电网的改进重合闸方案[J].电力系统保护与控制,2025,53(15):103-112,10.基金项目
This work is supported by the Science and Technology Project of the Headquarters of State Grid Corporation of China(No.5400-202340556A-3-2-ZN). 国家电网公司总部科技项目资助(5400-202340556A-3-2-ZN) （No.5400-202340556A-3-2-ZN）
