基于锁频环控制的多逆变器孤岛检测方法  

Multi-inverter Islanding Detection Method Based on Frequency-locked Loop Control

作　　者：李文龙 张新慧[1] 彭克[1] 张军 王锐 郭爱玉 LI Wenlong;ZHANG Xinhui;PENG Ke;ZHANG Jun;WANG Rui;GUO Aiyu(School of Electrical and Electronic Engineering,Shandong University of Technology,Zibo 255000,China)

机构地区：[1]山东理工大学电气与电子工程学院,淄博255000

出　　处：《高电压技术》2023年第12期5217-5227,共11页High Voltage Engineering

基　　金：国家自然科学基金(51807112);张店区校城融合发展计划项目(2021JSCG0006)。

摘　　要：为了解决多分布式电源(distributed generation,DG)孤岛检测时因注入扰动量相互抵消而产生的稀释效应问题,提出了一种基于锁频环控制的主从控制多DG孤岛检测方法。该方法通过锁频环控制和锁定孤岛发生时的相位,使孤岛发生时逆变器输出电压、电流的相位相同;然后,选择1台锁相环控制的DG作为主逆变器,其余的DG均采用锁频环控制。MATLAB/Simulink建模仿真和RTBox物理实验结果表明:该方法能够消除稀释效应,实现多DG孤岛检测。所提方法能够降低DG“反送电”的发生概率,提高供电的安全性。To solve the problem of dilution effect caused by mutual cancellation of the injected disturbances in the multi-distributed generation(DG)islanding detection,a master-slave control multi-DG islanding detection method based on frequency-locked loop control is proposed.In this method,the phases when islanding occurs are controlled and locked through the frequency-locked loop,so that the phases of the inverter’s output voltage and current are the same.Then,a DG controlled by a phase-locked loop is selected as the main inverter,and the rest of the DGs are controlled by the frequency-locked loop.The results of MATLAB/Simulink simulation and RT Box physical experiments show that the di-lution effect can be eliminated and the multi-DG islanding can be detected.The proposed method can reduce the probability of DG’s“reverse power transmission”and improve the security of power supply.

关 键 词：配电网 分布式电源 孤岛检测 锁频环控制 主从控制 稀释效应 

分 类 号：TM464[电气工程—电器]