Abstract
Aiming at the nonlinear output voltage equation of PWM rectifier, based on the topology with voltage-current double-loop control, a novel control method-fuzzy/PI+direct nonlinear control method for the output voltage is present. If the active current error is smaller than a threshold, PI+direct nonlinear control is used in order to ensure the linear control and stabilization precision of the output voltage. If the active current error is larger than the threshold, fuzzy+direct nonlinear control is applied for the nonlinear disturber thanks to current error and other uncertain reasons. In d-q synchronous reference frame, a decoupled control method is applied, which constrains the active current and the reactive current be controlled linearly and separately. The MATLAB simulation results indicate that the controller has super performance
Published Version
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