NDLI: A Novel Decoupled Current-Sharing Scheme Based on Circulating-Impedance in Parallel multi-Inverter System

Content Provider	IEEE Xplore Digital Library
Author	Mi Yu Yong Kang Yu Zhang Ming Yin Shanxu Duan Hongtao Shan Guoying Chen
Copyright Year	2007
Description	Author affiliation: HuaZhong Univ. of Sci. & Technol., Wuhan (Mi Yu; Yong Kang; Yu Zhang; Ming Yin; Shanxu Duan; Hongtao Shan; Guoying Chen)
Abstract	Parallel multi-inverter systems can be designed to have the advantages of expandable output power, improved reliability, and easy N+X redundancy operation. However, a current-sharing control scheme has to be employed to enable the inverters to share the load current equally. The concept of circulating impedance is proposed in the paper, and introduced into current-sharing control scheme in parallel multi-inverter systems. The mathematical model of circulating impedance is set up. By introducing circulating-impedance control regulator, the characteristic of circulating-impedance is controlled to be similar to that of the pure resistance or inductance. Then the relationship between the circulating-current phasor and the amplitude, the phase of inverter module's output voltage reference is decoupled. Experimental 220 Vac/3 KVA inverter modules are built and parallel operated. The results of experiment verify that the current-sharing scheme based on circulating impedance is available and efficient.
Starting Page	1668
Ending Page	1672
File Size	2643942
Page Count	5
File Format	PDF
ISBN	1424407834
ISSN	1553572X
DOI	10.1109/IECON.2007.4460122
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-11-05
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Inverters Impedance Power system reliability Power generation Redundancy Control systems Mathematical model Regulators Inductance Voltage
Content Type	Text
Resource Type	Article

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