Study on a Super Capacitor Energy Storage system for improving the operating stability of Distributed Generation system

Author

Wang, Juanhua ; Zhang, Jiancheng ; Zhong, Yun

Author_Institution

Key Lab. of Power Syst. Protection & Dynamic Security Monitoring & Control, North China Electr. Power Univ., Baoding

fYear

2008

fDate

6-9 April 2008

Firstpage

2702

Lastpage

2706

Abstract

A super capacitor energy storage (SCES) can be used as energy storage element of DG (distributed generation) system and provides necessary energy buffering. And it plays a very important role in improving operating stability of power system. Based on a wide voltage change scope of the SCES system, its main circuit has been designed in this paper, where bi-directional DC-AC-DC converter is regarded as transition circuit. The working situations of the SCES system under different loads have been analyzed in detail, and the corresponding system unified model is established when super capacitor is charged or discharged. According to the operating mechanics of SCES system, the relation between the stability of DG system and SCES system has been analyzed, and a better control scheme has also been designed. At last, the investigation of the SCES system and its control strategy are done with the use of exact simulation model. The simulation results verify the validity of designed scheme and the flexibility of control system.

Keywords

AC-DC power convertors; DC-AC power convertors; distributed power generation; power generation control; power system stability; supercapacitors; SCES system; bidirectional DC-AC-DC converter; distributed generation system; energy buffering; power system control; power system stability; super capacitor energy storage system; transition circuit; Bidirectional control; Buffer storage; Capacitors; Circuit stability; Control system synthesis; Distributed control; Energy storage; Power system analysis computing; Power system stability; Voltage; SCES; bi-directional DC-AC-DC converter; distributed generation; operating stability; unified model;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Utility Deregulation and Restructuring and Power Technologies, 2008. DRPT 2008. Third International Conference on

Conference_Location

Nanjuing

Print_ISBN

978-7-900714-13-8

Electronic_ISBN

978-7-900714-13-8

Type

conf

DOI

10.1109/DRPT.2008.4523869

Filename

4523869