Unified Equivalent Modeling for Stability Analysis of Parallel-Connected DC/DC Converters

被引：30
|
作者：
Li, Ming [1 ]
Tse, Chi K. [1 ]
Iu, Herbert H. C. [2 ]
Ma, Xikui [3 ]
机构：
[1] Hong Kong Polytech Univ, Elect & Informat Engn Dept, Kowloon, Hong Kong, Peoples R China
[2] Univ Western Australia, Sch Elect Elect & Comp Engn, Crawley, WA 6009, Australia
[3] Xi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R China
来源：
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2010年 / 57卷 / 11期
关键词：
Active current sharing; averaged model; bifurcation; parallel-connected buck converters; stability; DC-DC CONVERTERS; SYSTEMS; DESIGN;
D O I：
10.1109/TCSII.2010.2067751
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A unified equivalent modeling approach is proposed for enabling simple and effective analysis of stability of parallel-connected buck converters. Two kinds of active current-sharing schemes are considered, i.e., the master-slave scheme and democratic scheme. By applying elementary transformation to the Jacobian of the averaged model, two decoupled subsystems (which determine common-mode and differential-mode stabilities, respectively) have been found, irrespective of the specific type of active current-sharing scheme. From the decoupled subsystems, the parameters of interest that affect different stability issues are clearly identified. Results from this work greatly simplify the stability analysis and design of parallel-connected dc-dc converters.
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页码：898 / 902
页数：5
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