For achieving highly effective reactive power compensation of distribution network

a kind of time-domain method using adjustable sampling signal processing technology is proposed in this paper for eliminating harmonic interference.The contaminated signal is firstly resampled to a higher and nearest frequency which is an integral multiple of the harmonic fundamental.Then the signal is divided into several subsets by means of lower sampling.Harmonic interference is represented by a baseline deviation for each subset.The harmonics are then eliminated by moving the baseline of each subset.Since the baseline is generated purely by harmonics

shifting of the baseline does not change any of the original signal and other noise components.It is shown by the test result that compared with the wavelet packet decomposition method

the use of new time domain method can reduce the extension length of the sample

improve the filter performance stability and assist reactive power compensation better.