Dynamic magnetic flux signal processing method

Abstract

The present invention relates to a dynamic magnetic flux signal processing method. The method comprises the steps of: collecting voltage signals on an electromagnetic device, and performing sampling of the voltage signals; performing EMD (Empirical Mode Decomposition) of the sampled voltage signals, and obtaining K IMF components and residual components rn; employing a threshold determination condition to perform de-noising processing of the K IMF components; and performing signal reconstruction of the de-noised IMF components, the IMF components without de-noising and the residual componentsrn, and obtaining voltage signals capable of reflecting dynamic magnetic flux change after noise filtering. The method provided by the invention can perform monitoring of the electromagnetic device inreal time, can comprehensively and effectively remove magnetic flux signal interference, can achieve effective analysis of dynamic magnetic flux signals of the electromagnetic device and finally canachieve a purpose of improving signal detection accuracy of an electric power device.

Description

technical field [0001] The invention belongs to the technical field of signal processing. Specifically, it relates to a dynamic magnetic flux signal processing method. Background technique [0002] DC bias is an abnormal working state during the operation of power equipment. Generally, some factors cause DC current to flow through the windings of power equipment, thereby generating DC flux in its magnetic circuit and triggering a series of electromagnetic reactions. DC bias will make the power equipment in half-cycle saturation, which will cause problems such as harmonics, reactive power, eddy current, and noise. If the magnetic flux signal under the DC bias cannot be processed in time, it will not only increase the reactive power loss of the power equipment, but also may cause the misoperation of the protective relay. As a result, it is impossible to effectively monitor and protect electromagnetic equipment. Therefore, the processing of magnetic flux signals under DC bi...

AI Technical Summary

Problems solved by technology

Since the magnetic flux measurement signals of electromagnetic equipment under DC bias are basically non-stationary nonlinear signals, the traditional signal processing methods cannot meet the magnetic flux signal processing of electromagnetic equipment, resulting in the inability to effectively monitor electromagnetic equipment.

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