This paper presents an improved Walsh function IWF algorithms as an alternative approach for active and reactive powers\r\nmeasurement in linear and nonlinear, balanced and unbalanced sinusoidal three-phase load system. It takes advantage of Walsh\r\nfunction unified approach, simple algorithm and its intrinsic high level of accuracy as a result of coefficient characteristics and\r\nenergy behaviour representation. The developed algorithm was modeled on the Matlab Simulink software; different types of load,\r\nlinear and nonlinear, were also modeled based on practical voltage and current waveforms and tested with the proposed improved\r\nWalsh algorithms.TheIEEE standard 1459ââ?¬â??2000 which is based on fast Fourier transformFFT approach was used as benchmark for\r\nthe linear load system. The data obtained from laboratory experiment to determine power components in harmonic load systems\r\nusing Fluke 435 power quality analyzer PQA which complies with IEC/EN61010-1-2001 standard was modeled and used to validate\r\nthe improved algorithm for nonlinear load measurement. The results showed that the algorithm has the potential to effectively\r\nmeasure three-phase power components under different load conditions.
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