Distributed Control of Parallel AC to DC Converter

This paper presents the distributed control of parallel AC to DC converter using power balance control technique. Three single-phase CUK converters based on power factor correction (PFC) are parallel connected at dc outputs. Each converter operates in continuous conduction mode. The control systems consist of the voltage loop control and hysteresis control techniques apply to the current loop control. The microcontroller is used to communication between each controller of each module for adaptive power balance technique. The simulation results, three of 250 W/module are as follows : the inductor current sharing equally, fast transient response, tight dc bus voltage regulation, system modularity, redundancy and high power factor. So, the simulation results are used to illustrate the operation and investigation of the distributed control technique.