Sample shifting technique (SST) for estimation of harmonic power in polluted environment

In this paper, an attempt has been made to estimate real and reactive power components for each harmonic in a polluted sinusoidal environment based on a newly proposed sample shifting technique (SST). A special feature of this technique is that each harmonic power component is estimated from the samples of voltage and current signals only, without measuring the power factor angle, or adopting FFT or DFT etc. as used by traditional methods. The present method also determines the DC power component along with the sinusoids. The method of SST is supported by simulation results along with experimental validation.