Title :
An improved droop control strategy for load current sharing in output parallel-connected DC-DC converters
Author :
Oberto, V.P. ; Depexe, M.D. ; Naidon, T.C. ; Campos, A.
Author_Institution :
Group of Intell. in Lighting (GEDRE), Fed. Univ. of Santa Maria (UFSM), Santa Maria, Brazil
Abstract :
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.
Keywords :
DC-DC power convertors; LED lamps; electric current control; power supplies to apparatus; street lighting; LED street lighting fixture; buck converters; current sharing control technique; distributed power supply; improved droop control strategy; light emitting diode street lighting fixture; line resistance; load current controller output; load current sharing; main control loop; modular power supply; output parallel-connected DC-DC converters; power 75 W; voltage reference adjustment; DC-DC power converters; Light emitting diodes; Load modeling; Power supplies; Resistance; Voltage control; Voltage measurement; Current sharing; DC-DC converters; Distributed control; Parallelism;
Conference_Titel :
Industry Applications (INDUSCON), 2014 11th IEEE/IAS International Conference on
Print_ISBN :
978-1-4799-5550-3
DOI :
10.1109/INDUSCON.2014.7059404
