Abstract：Through theoretical analysis, leakage errors within sub-bands of wavelet transform harmonic power measurement algorithms exist when signal is non-synchronously sampled, and the simulation shows that the relative errors in sub-bands are 5×10-2. In order to reduce leakage errors, the relative error expressions were derived and an anti-leakage-error algorithm for wavelet transform harmonic power measurement was proposed based on integer lapped window.The simulation shows that,for the new algorithm,the relative errors caused by leakage in sub-bands are less than 1.2×10-4, much improved the that conventional wavelet transform harmonic power measurement algorithms.
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2010, Vol. 31 
