摘要
由于逆变型分布式电源(inverter-interfaced distributed generation,IIDG)的故障特性主要由其控制策略及电网故障情况决定,在不同故障场景和工况下,传统的被动式保护方法存在保护整定和协调困难的问题。为此,提出一种基于控保协同的有源配网主动注入式保护方法,故障期间控制IIDG主动向电网注入特征信号,保护处利用检测到的特征信号来获取IIDG的基波信息,从而消除IIDG对各支路电流及现有电流保护的影响。由于保护利用的故障特征是由IIDG主动注入的,因此该方法在不同场景和工况下都有较好的适用性,且不需要增加额外的通信和检测设备,具有经济性好和实用性高的优点。仿真结果验证了所提方法的有效性。
Since the fault characteristics of inverter-interfaced distributed generation(IIDG)are mainly determined by its control strategy and grid fault conditions,the traditional passive protection method suffers from difficulties in protection rectification and coordination in different fault scenarios and operating conditions.Thus an active distribution network active injection protection method based on control and protection coordination is proposed,in which the IIDG is controlled to actively inject characteristic signals into the grid during faults.The protection uses the detected characteristic signals to extract the fundamental information of the IIDG,thus eliminating the influence of the IIDG on each branch current and existing current protection.Since the fault features used by the protection are actively injected by the IIDG,the proposed method has good applicability in different scenarios and operating conditions,and does not require additional communication and detection equipment.This has the advantages of good economy and high practicality.The simulation results verify the effectiveness of the proposed method.
作者
戴志辉
吴桐
何静远
赵謇
DAI Zhihui;WU Tong;HE Jingyuan;ZHAO Jian(Hebei Laboratory of Distributed Energy Storage and Microgrid(North China Electric Power University),Baoding 071003,China)
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2024年第3期94-103,共10页
Power System Protection and Control
基金
国家自然科学基金项目资助(51877084)。
关键词
逆变型分布式电源
主动注入式保护
控保协同
有源配网
协调控制
inverter-interfaced distributed generator
active injection protection
control and protection synergy
active distribution network
coordinated control
