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The Walsh Functions Based Method for Reactive Power Measurement

In this paper a Walsh function based method is proposed for Reactive Power (RP) measurement. As the main advantage, the Walsh function based algorithm provides a convenient calculating process and simplifies the multiplication procedure in order to obtain reactive component from entire instant power signal. The advantages of the proposed method for the measuring of the reactive power have been verified by experimental studies. One of these advantages is that in contrast to the known existing methods which involve time delay or shifting of the input signal, the proposed method does not require the time delay of the current signal to the pi/2 with respect to the voltage signal. To test the validity and effectiveness of the suggested method for evaluation of the active and the reactive components of the electrical power a simulation tool have been developed using "Matlab".