Patent ID: 11159100

Abstract:
A modified modulated wave acquisition method includes: obtaining a modulated wave uaba; calculating a difference between the given value iNq* and the actual value iNq of the q-axis component of a grid side current, inputting the result to a proportional integral (PI) controller, and multiplying an output of the PI controller by cos ωt to obtain a modulated wave offset Δuaba; and calculating a difference between the modulated wave uaba and the modulated wave offset Δuaba to obtain a modified modulation wave uaba′, where ωt is a grid voltage phase in a sinusoidal case. The MPC method for a single-phase cascaded H-bridge rectifier includes: obtaining the modified modulated wave uaba′, where the component iNq* is 0; and replacing the modulated wave uaba with the modified modulated wave uaba′ to perform MPC for the single-phase cascaded H-bridge rectifier.