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An improved three‐phase reactive power measurement algorithm using walsh functions transform
Author(s) -
Aliyu Garba,
Khalid Saifulnizam Bin Abd.,
Mustafa Mohd Wazir,
Shareef Hussein
Publication year - 2014
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.21930
Subject(s) - ac power , harmonic , nonlinear system , algorithm , three phase , power (physics) , electricity , fourier transform , computer science , fast fourier transform , reliability (semiconductor) , voltage , electrical engineering , engineering , mathematics , mathematical analysis , physics , quantum mechanics
This paper proposes an improved algorithm for three‐phase power component measurement using the Walsh function (WF), which takes into account the advantages offered by the algorithm in the analysis of nonlinear load problems to improve the accuracy and reliability of measurement. In the pricing of electricity based on the value of the integral of the load active power measured using a kilowatt‐hour meter, the electric utility loses some revenue for the energy delivered to current harmonic generating customers and customers whose load causes current asymmetry. An improved algorithm based on the WF for measuring the active and reactive power of a network with linear and or nonlinear and sinusoidal or nonsinusoidal network is developed and tested, and the result compared with IEEE standard 1459–2000 which is based on fast Fourier transformation. The method does not require phase shifting of the phase current signals by π /2 with respect to the voltage signals. The proposed algorithm enables reactive power measurement for proper electricity billing to the consumer with nonlinear loads. © 2013 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.