Title :
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
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;
Conference_Titel :
Sustainable Power Generation and Supply, 2009. SUPERGEN '09. International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-4934-7
DOI :
10.1109/SUPERGEN.2009.5348242
