Design and simulation of PI control for paralleled positive output elementary Luo converters for distributed power supplies

The switch mode DC-DC converters are used to convert the unregulated DC input voltage into a controlled DC output voltage at a desired level. They are mostly used in computer power supplies, servo motor drives, medical equipments etc. Luo converter is a recently developed DC-DC converter. Positive output Luo converter performs the voltage conversion from positive source voltage to positive load voltage. Parallel connection of Luo converters are used when available converters are of lower current rating but load requires higher current. Because of dissimilarities in devices and components used in converters, current drawn or supplied by each converter is unequal which will lead to converter failure or malfunction. Therefore the main control issues in parallel connected converters are to ensure proper current sharing and equalize the output currents among converters and also to ensure regulated output voltage under load and supply disturbances. The objectives of this work are to design and develop PI control for paralleled positive output Luo converters using MATLAB software. The simulation results are presented. They validate the PI control developed