Abstract：This paper proposes a method for dynamic voltage flicker measurement based on Taylor-Fourier filter (TFF).Firstly,the envelope of voltage flicker is extracted by TFF,and the envelope parameters can be expressed by the Taylor coefficients.The estimation of the modulation depth,modulation frequency and detection of the envelope transients can thus be achieved.Secondly,the TFF of the extracted envelop is performed to estimate the time and frequency domain information of each flicker component.Finally,based on the estimated envelope parameters,the flicker values are calculated according to the definitions of IEC (international electrotechnical commission).Compared with the S-transform method based on Teager energy operator,the proposed method has higher accuracy and smaller calculation amount.The proposed method can achieve the measurement of time-varying voltage flicker.The measured results verify the accuracy and usefulness of the proposed method.
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2020, Vol. 35 
