Improved Active Islanding Detection Technique for Multi-Inverter Power System  

作　　者：Jie Zhang Yu-Hua Cheng Kai Chen Gen Qiu 

机构地区：[1]School of Automation Engineering,University of Electronic Science and Technology of China,Chengdu 610054

出　　处：《Journal of Electronic Science and Technology》2021年第2期186-195,共10页电子科技学刊（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant No.61671109.

摘　　要：Due to the increased penetration of multi-inverter distributed generation(DG)systems,different DG technologies,inverter control methods,and other inverter functions are challenging the capabilities of islanding detection.In addition,multi-inverter networks connecting the distribution system point of common coupling(PCC)create islanding at paralleling inverters,which adds the vulnerability of islanding detection.Furthermore,available islanding detection must overcome more challenges from non-detection zones(NDZs)under reduced power mismatches.Therefore,in this study,a new method called parameter self-adapting active islanding detection was utilized to minimize the dilution effect and reduce NDZs in multi-inverter power systems.The method utilizes an active frequency drift(AFD)method and applies a positive feedback gain of adoption parameters,which significantly minimizes NDZs at parallel inverters.The simulation and experimental outcomes indicate that the proposed method can effectively weaken the dilution effect in multi-inverter networks connecting the distribution system PCC.

关 键 词：Active frequency drift(AFD) active islanding detection method multi-inverter power system non-detection zones(NDZs) 

分 类 号：TM61[电气工程—电力系统及自动化]