Parallel operation of three-phase bi-directional isolated interleaved DC-DC converters for battery test system

Author

Hyunsik Jo ; Hanju Cha

Author_Institution

Dept. of Electr. Eng., Chungnam Nat. Univ., Daejeon, South Korea

fYear

2014

fDate

16-20 March 2014

Firstpage

1584

Lastpage

1589

Abstract

In this paper, parallel control method of two 2.5 kW three-phase bi-directional isolated interleaved dc-dc converters for the battery test system is discussed. The battery test system consists of battery modules, two three-phase bi-directional isolated interleaved dc-dc converters and three-phase inverter. In discharge mode, energy from battery is delivered to grid and energy is delivered to battery from grid in charge mode. To get decent phase margin and magnitude at crossover frequency, type 3 controller is used for voltage controller. Average current sharing control method is used for maintaining each three-phase dc-dc converter current equal. By using this method, unbalance factor is improved to 1% from 8%. Two 2.5 kW three-phase bidirectional dc-dc converter prototypes are built and the proposed methods are verified through experiments.

Keywords

DC-DC power convertors; battery storage plants; electric current control; voltage control; average current sharing control method; battery modules; battery test system; charge mode; crossover frequency; discharge mode; parallel operation; power 2.5 kW; three-phase bidirectional isolated interleaved DC-DC converters; three-phase inverter; type 3 controller; voltage controller; Batteries; Bidirectional control; Clamps; Discharges (electric); Inductors; Inverters; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2014 Twenty-Ninth Annual IEEE

Conference_Location

Fort Worth, TX

Type

conf

DOI

10.1109/APEC.2014.6803518

Filename

6803518