In this paper,the method of island detection in the case of multiple inverters connected to the grid is studied,and a passive island detection method based on wavelet transform is proposed.The common point voltage and frequency are measured,the reactive power is taken as a reference,and the entropy is calculated as an addition-al criterion for island detection.At the same time,the simulation model of PV grid connection is established,and the feasibility of the detection method is verified in different situations.Simulation results show that wavelet transform op-timizes the complicated feature stratification and detection range,identifies the shortcoming of process complexity,and shortens the detection time.Compared with the active island detection method applied to multiple inverters,this method has no dilution effect and interference to power quality.Compared with other detection methods with similar principle,this method can also effectively identify false islands.
关键词
分布式发电/孤岛检测/小波变换/被动式
Key words
distributed power generation/island detection/wavelet transform/passive
维普
万方数据