Stability study of DC DPS and the improvement with EDLC

Author

Tang, Xisheng ; Qi, Zhiping

Author_Institution

Inst. of Electr. Eng., Chinese Acad. of Sci., Beijing, China

fYear

2009

fDate

6-7 April 2009

Firstpage

1

Lastpage

5

Abstract

Stability problems of DC Distributed Power System (DPS) arise with the widely use of tightly regulated power modules including: (i) negative impedance characteristic in small-signal sense of constant power load, (ii) the interaction among the power converters. The concept of impedance specifications for a stable DPS was introduced and explained. Electric Double-Layer Capacitor (EDLC) has high power density and small Equivalent Series Resistance (ESR). A viewpoint was brought forward originally in this paper that the output impedance of DC DPS will be reduced and system stability will be improved largely by linking EDLCs to the DC bus. It was proved valid and feasible in a design instance.

Keywords

distributed power generation; electrolytic capacitors; power convertors; power system stability; DC distributed power system; EDLC; electric double-layer capacitor; equivalent series resistance; negative impedance characteristics; power converters; regulated power modules; system stability; Analog-digital conversion; Impedance; Joining processes; Multichip modules; Paramagnetic resonance; Power generation; Power system stability; Stability analysis; Supercapacitors; Voltage; Constant power load; DC DPS; EDLC; Impedance specifications; Small-signal stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Sustainable Power Generation and Supply, 2009. SUPERGEN '09. International Conference on

Conference_Location

Nanjing

Print_ISBN

978-1-4244-4934-7

Type

conf

DOI

10.1109/SUPERGEN.2009.5348242

Filename

5348242