Power distribution network power quality disturbance detection method based on EWT and MFDE
A technology of power quality disturbance and detection method, which is applied in the direction of measuring electrical variables, measuring electricity, and measuring devices, and can solve problems such as inability to decompose signal complexity and high computational complexity
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[0110] The realization mode of the empirical wavelet decomposition EWT and MFDE detection disturbance signal of the present invention is:
[0111] The present invention uses the optical voltage transformer to extract the signal in the active distribution network, and after preprocessing the analog signal, adopts the empirical wavelet transform to analyze the 11 types of power quality disturbance signals C1- C11, perform mode decomposition, extract the intrinsic mode function (BLIMF) containing characteristic information, and use it as the input signal of multi-scale oscillation dispersion entropy MFDE, so as to realize the detection and classification of power quality.
[0112] The signal extraction of the optical voltage transformer is based on the Pockels effect, which mainly includes the sensor unit on the high voltage side, the photoelectric unit on the low voltage side and the electro-optic crystal. There are many types of electro-optic crystals, among which BGO crystals ...
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