An Improved Walsh Function Algorithm for Use in Sinusoidal and Nonsinusoidal Power Components Measurement

Table 1

The result of case A.

FFT approach	Active power 𝑃 (watts)	Reactive power 𝑄 (var)
Phase a	1181.1	944.8
Phase b	214.1	746.5
Phase c	492.6	1039.1
Total	1887.8	2730.4
Proposed IWF method
Phase a	1180.7	944.5
Phase b	214.8	746.7
Phase c	493.5	1040.2
Total	1889	2731.4