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Harmonic pollution has been a key issue affecting the safe operation of power system. But the traditional harmonic analysis methods are easy to be affected by the environmental factors. In order to reduce the impact of these disturbances, a novel harmonic analysis method based on center frequency shift is presented. The harmonic spectral lines located at the half frequency points is need for frequency...
To solve the problems of the existing on-site calibration methods, for instance, the methods need power off, and the standard transformers have large volume, heavy weight and small dynamic range, this paper proposes a high accuracy on-line calibration method for current transformers. By using a clamp-shape Rogowski coil as the standard current transformer, instead of traditional electromagnetic transformer,...
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