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

Volume

50

Issue

2

fYear

2014

fDate

March-April 2014

Firstpage

1131

Lastpage

1140

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;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/TIA.2013.2274471

Filename

6566011