A modular multilevel converter with half-bridge submodules for hybrid energy storage systems integrating battery and UltraCapacitor

Author

Feng Guo ; Sharma, Ratnesh

Author_Institution

NEC Labs. America, Inc., Cupertino, CA, USA

fYear

2015

fDate

15-19 March 2015

Firstpage

3025

Lastpage

3030

Abstract

In this paper, a modular multilevel converter (MMC) and the control algorithm are proposed for hybrid energy storage systems (HESS) that combine battery and UltraCapacitor (UC). Half bridges integrated with low voltage UC modules are utilized as the submodule of the converter, and the high voltage battery pack is put at dc bus. Compared to traditional HESS topologies and other MMCs for HESS applications, the proposed MMC increases the overall system efficiency, reduces the cost of dc side passive components, and is favorable for grid energy storage systems. The mathematical model of the converter is derived. A control algorithm to independently control the power from battery and UC is proposed. Real-time simulation results are provided to verify the theoretical analysis.

Keywords

mathematical analysis; power control; power convertors; supercapacitors; DC side passive component; HESS; MMC; battery; grid energy storage system; half bridge integration; half-bridge submodule; hybrid energy storage system; low voltage UC module; mathematical model; modular multilevel converter; ultracapacitor; Batteries; Inductors; Power generation; Simulation; Topology; Voltage control; battery; hybrid energy storage system; modular multilevel converter; ultracapacitor;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2015 IEEE

Conference_Location

Charlotte, NC

Type

conf

DOI

10.1109/APEC.2015.7104783

Filename

7104783