Multi-target selected harmonics suppression pulse width modulation method of modular multilevel converter
A modular multi-level, specific harmonic technology, applied in the field of power electronics, can solve the problems of uneven distribution of non-dominated solutions, slow convergence speed, high computational complexity, etc., and achieve simple implementation, low switching loss, and high optimization efficiency Effect
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[0042] The present invention will be further described below in conjunction with the accompanying drawings, and the purpose and effect of the present invention will be more obvious.
[0043] figure 1 It is a schematic diagram of the principle of the multi-target specific harmonic suppression pulse width modulation method for the modular multi-level converter. Among them, V mr is the reference voltage, V l and I l Indicate the detected load voltage and load current respectively, and first pass the detected V through the fast Fourier transform module l Fourier transform is performed by interacting with V mr After the comparison, then through the PI controller module, and then according to the specific harmonic suppression target and modulation ratio M required by the actual project a and the set optimization parameter values, using the multi-objective adaptive extremum optimization solver to optimize the multi-objective optimization mathematical model for the specific harmo...
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