A Power Shaping Stabilizing Control Strategy for DC Power Systems With Constant Power Loads

This paper describes a novel stabilizing control strategy for dc power systems with constant power loads. The destabilizing element associated with a constant power load is eliminated by reformulating the system dynamic equations in terms of the rate of change of energy, or instantaneous power. A power shaping control strategy is employed to regulate the output voltage, while essentially maintaining large-signal system stability with increased region of attraction. The proposed control strategy is simple and easy to design and implement. Its utility and effectiveness are demonstrated by simulations and experiments.