Reactive power compensation method based on double random phase estimation
PENG Yi-chun
HE Shi-qiu
Abstract：In order to solve the problem of real time reactive power compensation, a reactive power compensation method based on double random phase estimation was proposed.The Fourier transform was carried out for the sampled power signal, and the fundamental wave of power signal and the frequency information of harmonic waves in each order were determined with the spectral peak location algorithm.In addition, the signal with the same frequency and different phase was modulated to obtain the modulated signal, and the filtered signal was attained through the low pass filtering.In combination with the specific value of filtered signal and the value of random phase trigonometric function, the signal phase information to be estimated was obtained, which could assist the reactive power compensation.The validity of the proposed algorithm was verified through the stimulated and the actually acquired power signals.The results show that the relative error of phase estimation is below 1‰, and the reactive power compensation can effectively improve the energy usage efficiency of the circuit.
Keywords：reactive power compensationrandom phasephase modulationFourier transformspectral peak locationlow pass filteringpower signalharmonic wave
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 361-365 )