Dear Miguel,

Regarding power quality, please have a look on some of our paper based on signal processing (attached papers).

Regards,

Mohamed

Dear Miguel,

Other recent and last papers!!

Regards,

Mohamed

please refer to following link for see a paper about "Comparison of S-transform and Wavelet Transform in Power Quality Analysis ". May be it help you.

http://waset.org/publications/6884/comparison-of-s-transform-and-wavelet-transform-in-power-quality-analysis

S-Transform is better. Now a days researchers have also proposed a modified version of S-transform known as FAST-S transform which reduces computation burden on the processor. Further a matrix version of S-transform known as sparse transform is also available in the literature.

The following paper may help you:

http://www.ijareeie.com/upload/2013/december/40_CLASSIFICATION.pdf