A new improved walsh function algorithm for active and reactive power measurement

Garba Aliyu, Saifulnizam Abd Khalid, Jafaru Usman, Ahmad Fuad A. Aziz, Hussein Shareef

Research output: Contribution to journalArticlepeer-review


This paper present improved Walsh function (IWF) algorithm as an alternative approach for active and reactive power measurement in linear and nonlinear, balanced and unbalanced sinusoidal three phase load system. It takes advantage of Walsh function unified approach and its intrinsic high level accuracy as a result of coefficient characteristics and energy behaviour representation. The developed algorithm was modeled on the Matlab Simulink software; different types of load, linear and nonlinear were also modeled based on practical voltage and current waveforms and tested with the proposed improved Walsh algorithm. The IEEE standard 1459-2000 which is based on fast Fourier transform FFT approach was used as benchmark for the linear load system while a laboratory experiment using Fluke 435 power quality analyzer PQA which complies with IEC/EN61010-1-2001standards was used to validate the improved algorithm for nonlinear load measurement. The results showed that the algorithm has the potential to effectively measure three phase power components under different load conditions.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalJurnal Teknologi (Sciences and Engineering)
Issue number3
Publication statusPublished - 2014
Externally publishedYes


  • Fast fourier transform
  • Measurement
  • Nonlinear load
  • Reactive power
  • Walsh function

ASJC Scopus subject areas

  • General Engineering


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