PWM rectifier control comparison for aerospace applications

High-voltage DC-bus power quality is examined when the power network is supplied by a PWM rectifier controlled using different DC-bus voltage regulation schemes. Three controllers are compared, a voltage oriented control and two model predictive control schemes, predictive current fixed frequency and predictive direct power control. A set of PWM rectifier simulation models illustrate the performance of the controllers; a switched model, an ideal averaged-value model and an enhanced averaged-value model which contains the key loss mechanisms. The DC-bus transients are within the limits defined in MIL-STD-704F only when a predictive direct power control is employed.