Precise measurement of dielectric loss angle is very important for electric capacity equipment in recent power
systems. When signal-to-noise is low and fundamental frequency is fluctuating, aiming at the measuring error of dielectric
loss angle based on some recent Fourier transform and wavelet transform harmonics analysis method, we propose a novel
algorithm based on sparse representation, and improved it to be more flexible for signal sampling. Comparison
experiments describe the advantages of our method.
