Development of a 500-kW Modular Multilevel Cascade Convertor for battery energy storage systems

Author

Kawakami, Noriko ; Ota, Sadao ; Kon, Hiroyuki ; Konno, Shuji ; Akagi, Hirofumi ; Kobayashi, Hideo ; Okada, Norio

Author_Institution

Power Electron. Dept., Toshiba Mitsubishi Electr. Ind. Syst. Co. (TMEIC), Tokyo, Japan

fYear

2013

fDate

15-19 Sept. 2013

Firstpage

3375

Lastpage

3381

Abstract

Natural energy sources such as wind turbines and photovoltaic power generators cause instability of the power grid due to their output fluctuations. Battery energy storage systems (BESSs) are being considered as a countermeasure for this issue. A Modular Multilevel Cascade Convertor (MMCC) is one suitable circuit topology for BESSs, because each cell can control each battery´s state-of-charge independently, and the level of generated harmonics is low enough to eliminate the AC filter normally installed in conventional two level converters. This paper describes the development of a real-scale (500 kW) H-bridge MMCC for BESSs and reports successful test results of the control functions with a scale down grid model and a 6.6-kV real-scale distribution line.

Keywords

bridge circuits; harmonics; network topology; power distribution lines; power grids; solar cells; AC filter; BESS; battery energy storage systems; battery state-of-charge; circuit topology; control functions; harmonics generation; level scale H-bridge MMCC; modular multilevel cascade convertor; natural energy sources; output fluctuations; power 500 kW; power grid; real-scale distribution line; two level converters; voltage 6.6 kV; Batteries; Fluctuations; Frequency control; Insulated gate bipolar transistors; Integrated circuit modeling; System-on-chip; Test equipment;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2013 IEEE

Conference_Location

Denver, CO

Type

conf

DOI

10.1109/ECCE.2013.6647144

Filename

6647144