Title :
Wavelet-based fault detection in grid-connected photovoltaic systems
Author :
Barreto, R.L. ; Costa, F.B. ; Rocha, T.O.A. ; Neto, Cecilio M. S. ; Lira, J.R.V. ; Ribeiro, Ricardo L. A.
Author_Institution :
Fed. Univ. of Rio Grande do Norte (UFRN), Natal, Brazil
Abstract :
This paper proposes a real-time wavelet-based fault detection as well as a real-time analysis of voltage sag/swell due to faults in a grid-connected photovoltaic system, which is the first step for a wavelet-based islanding protection. The spectral energy of the voltage is decomposed in scaling coefficient energy and wavelet coefficient energy. The real-time analysis of the scaling coefficient energy provides the undervoltage and overvoltage protection, whereas the wavelet coefficient energy provides a high-speed fault detection. The wavelet-based fault detection was assessed in an experimental grid-connected photovoltaic system.
Keywords :
distributed power generation; fault diagnosis; overvoltage protection; photovoltaic power systems; power distribution faults; power supply quality; power system protection; grid-connected photovoltaic systems; overvoltage protection; real-time analysis; spectral energy; undervoltage protection; voltage sag; voltage swell; wavelet coefficient energy; wavelet-based fault detection; wavelet-based islanding protection; Delay effects; Fault detection; Real-time systems; Voltage control; Voltage fluctuations; Wavelet analysis; Wavelet transforms; Islanding; fault detection; grid-connected photovoltaic systems; wavelet transform;
Conference_Titel :
Power Electronics Conference (COBEP), 2013 Brazilian
Conference_Location :
Gramado
DOI :
10.1109/COBEP.2013.6785245