This work presents a novel current sharing control technique based on an improved droop control scheme for a modular power supply composed of n output parallel-connected DC-DC converters. Each converter is connected to the load through individual line resistance and modeled as a dependent voltage source. In order to provide proper load sharing, a voltage reference adjustment for the main control loop is done through the load current controller output. A distributed power supply composed by three buck converters with their outputs connected in parallel designed for a 75 W Light Emitting Diode (LED) street lighting fixture is tested through simulations to prove the feasibility of the idea.
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Oberto et al. (2014) studied this question.
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