Title :
Experiment and Simulation of a Modular Push–Pull PWM Converter for a Battery Energy Storage System
Author :
Hagiwara, Manabu ; Akagi, Hirofumi
Author_Institution :
Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol., Tokyo, Japan
Abstract :
This paper presents a modular push-pull PWM converter (MPC) for a battery energy storage system, which is intended for grid connections to medium- or high-voltage power systems. The converter per phase consists of a center-tapped transformer and two arms based on a cascade connection of multiple bidirectional PWM chopper-cells with floating dc capacitors. This paper discusses the operating performance and control method of the MPC, focusing on voltage balancing of all the floating dc capacitors. Moreover, a comparison is made between the MPC and a modular multilevel converter (MMC), under an assumption that both are used as the same battery energy storage system. The validity of the operating performance and control method is confirmed by both computer simulation using the “PSCAD/EMTDC” software package and experiment using a three-phase, 200-V, 5-kW downscaled model.
Keywords :
PWM power convertors; battery storage plants; capacitors; choppers (circuits); power grids; transformers; MMC; MPC; PSCAD-EMTDC software package; battery energy storage system; center-tapped transformer; floating dc capacitors; grid connection; high-voltage power systems; medium-voltage power system; modular multilevel converter; modular push-pull PWM converter; multiple bidirectional PWM chopper-cells; power 5 kW; three-phase downscaled model; voltage 200 V; Batteries; Inductors; Inverters; Pulse width modulation; Voltage control; Windings; Battery energy storage systems; multilevel converters; voltage-balancing control;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2013.2274471
