Restraining method of inverter voltage feed-forward direct-current components and control method for inverter
A technology of DC component and voltage feedforward, which is applied in the direction of irreversible DC power input conversion to AC power output, AC power input conversion to DC power output, electrical components, etc. Difficulty in software processing, reduced ability of the inverter to resist grid voltage disturbances, etc.
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[0056] The method for suppressing the inverter voltage feedforward DC component of the present invention comprises the following steps:
[0057] One: phase shift 90° (lag) and difference method to achieve
[0058] The sampling power frequency is a 50Hz three-phase grid voltage signal, which contains DC components, positive and negative sequence 50Hz fundamental components, positive and negative sequence harmonic components, and the positive sequence 50Hz fundamental components are transformed into DC by Clark transformation and Park transformation component, the negative sequence 50Hz fundamental component becomes the 2nd harmonic after Clark transformation and Park transformation, the DC component in the original three-phase power grid voltage signal undergoes Clark transformation and Park transformation into 50Hz AC component, all the original n times positive sequence Harmonic components will be reduced by 1 to become n-1 harmonics, and all original n negative sequence harm...
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