Method for estimating electromagnetic interference of power electronic conversion system based on power transmission line
A technology of power transmission lines and power electronics, applied in computing, computer-aided design, electrical digital data processing, etc., can solve problems such as circuit complexity, least squares fitting residuals, and convergence deterioration, and achieve accurate approximation and The effect of stabilizing convergence
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[0076] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0077] A method for estimating electromagnetic interference of a power electronic commutation system considering power transmission lines, comprising the following steps:
[0078] Step 1. The power transmission line between the power electronic converter device and the power system is equivalent to a transmission circuit.
[0079] Based on Maxwell's electromagnetic theory, as the frequency of the excitation signal increases, the parasitic resistance of the equivalent model of the transmission line increases due to the skin effect and proximity effect, and its AC resistance is much larger than the DC resistance. At the same time, part of the inductance reflects the magnetic field effect generated around the current-carrying line, and because the three-phase power frequency AC current flowing through the wire, the skin effect and hysteresis effec...
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