Design of 2MW/10kV cascaded power conversion system

Author

Ling Zhi-Bin ; Cao Yang ; Ma Qin-Dong ; Guo Hai-Feng ; Zhang Bai-hua ; Lu Zhi-Gang

Author_Institution

Key Lab. of Control of Power Transm. & Conversion, Shanghai Jiao Tong Univ., Shanghai, China

fYear

2014

Firstpage

4250

Lastpage

4255

Abstract

Cascaded power conversion system was used in battery energy storage system. It can be connected to medium-voltage grid directly and expanded to larger capacity easily. Without 50Hz booster transformer, medium voltage cascaded power conversion system can reduce power loss. In 2011, the China Southern Power Grid launched the project of 2MW/10kV battery energy storage system. In this paper, the design requirement of the cascaded power conversion system, main circuit topology and power unit topology were described. Then parameters of key part were designed, and power loss was analyzed. Besides, a prototype was built to verify the feasibility of the design.

Keywords

energy storage; power conversion; power grids; China Southern Power Grid; battery energy storage system; cascaded power conversion system; design requirement; main circuit topology; medium-voltage grid; power 2 MW; power loss; power unit topology; voltage 10 kV; Batteries; Capacitors; Inductors; Insulated gate bipolar transistors; Power conversion; Switching frequency; Batteries Energy storage; Distributed power generation; Power control; Power conversion; Power system stability; Pulse width modulation converters; Smart grids; power dissipation;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics Society, IECON 2014 - 40th Annual Conference of the IEEE

Type

conf

DOI

10.1109/IECON.2014.7049141

Filename

7049141