Under the action of non-sinusoidal load current,there is a periodic harmonic signal in the electricity meter,so the de-tection method of non-sinusoidal harmonic signal based on generalized delayed signal superposition operator is proposed.Based on generalized delayed signal superposition operator,the harmonic frequency signal and its corresponding orthogonal signal are obtained.After processing the harmonic frequency signal obtained by the generalized S transform,the amplitude and phase in-formation of the signal at the corresponding time and frequency sampling point can be obtained.The harmonic and inter-har-monic parameters are calculated through the three-point line interpolation,and the complete ensemble empirical mode decompo-sition of adaptive noise is used to detect the non-sinusoidal harmonic signal.The test results show that the proposed method has good transformation performance,and can reliably complete the harmonic signal transformation processing and obtain the IMF component results of the signal.The maximum error results of frequency,amplitude and phase detection are 0.000 37,0.000 42 and 0.000 39 respectively,and the maximum efficiency is 99.54％,which can effectively detect non-sinusoidal har-monic signal in electric energy metering.
关键词
通用信号/延迟叠加算子/电能计量/非正弦谐波/信号检测/三线谱插值
Key words
generalized signal/delay superposition operator/electric energy measurement/non-sinusoidal harmonic/signal de-tection/three-point line interpolation
维普
万方数据