孤岛检测中复小波变换与实小波变换的对比

doi:10.3969/j.issn.0255-8297.2016.01.005

Abstract

Abstract: Islanding detection is an important issue in grid-connection of a distributed photovoltaic system. The paper compares complex and real wavelet transforms used in islanding detection. Islanding is judged by extracting and analyzing changes in the amplitude and phase of wavelet transform coefficients of the voltage at common coupling points. Simulation results show that the islanding detection method based on complex wavelet transform is more effective than that based on real wavelet transform. The complex wavelet method also solves the problem of tedious layering of characteristic signal and complicated threshold selection encountered in the real wavelet based method.

Key words: islanding detection, complex wavelet, real wavelet, continuous wavelet transform, amplitude and phase of wavelet coefficient

CLC Number:

TM615

FANG Xiao-mei, LUO Xiao-shu, JIANG Pin-qun, SONG Shu-xiang, LIAO Zhi-xian. Comparison of Complex and Real Wavelet Transforms in Islanding Detection[J]. Journal of Applied Sciences, 2016, 34(1): 42-48.

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URL: https://www.jas.shu.edu.cn/EN/10.3969/j.issn.0255-8297.2016.01.005

https://www.jas.shu.edu.cn/EN/Y2016/V34/I1/42

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Comparison of Complex and Real Wavelet Transforms in Islanding Detection

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