|
|
|
| Output Impedance Optimization and Stability for Cascade DC/DC Converter |
| Yao Yuying1, Zhang Donglai1, Xu Dianguo2 |
| 1. Harbin Institute of Technology Shenzhen Graduate School Shenzhen 518055 China; 2. Harbin Institute of Technology Harbin 150001 China |
|
|
|
|
Abstract Stability of the cascade DC/DC converter is a significant issue in distributed power supply (DPS) system design. For a single DC/DC converter, the characteristics of closed-loop output impedance are analyzed by simulations and experiments. The optimal criterion show that output impedance should be designed under the condition of manimum input voltage and no-load. The influence of capacitors on the source converter is simulated and analyzed. Several propositional rules are concluded for DC bus filter design. Furthermore, optimization principles are applied to improve the performance of a cascade DC/DC converter, and a voltage disturbance source is injected to obtain the impedance ratio for stability estimation. Experimental results show that impedance ratio optimization is a necessary stable condition for cascade system.
|
|
Received: 29 August 2008
Published: 12 February 2014
|
|
|
|
|
|
[1] Luo S G. A review of distributed power systems part I -DC distributed power system[J]. IEEE A&E Systems Magazine, 2005, 20(8): 5-16.
[2] Cho B H, Choi B. Analysis and design of multi-stage distributed power systems[C]. IEEE 13th Internat- ional Telecommunications Energy Conference (INTELEC ), 1991, 1: 220-225.
[3] Ly J H, Truong C. Stability analysis of the inter- national space station electrical power systems[C]. 32nd Intersociety Energy Conversion Engineering Conference, 1997, 1: 246-252.
[4] Seiya A, Hiroshi N, Masahiko H. Stability improvement of distributed power system by using full-regulated bus converter[C]. IEEE Industrial Electronics Conference(IECON) 2005, 31st Annual Conference, 2005, 1: 2549-2553.
[5] 朱成花, 严仰光. 一种改进的阻抗比判据[J]. 南京航空航天大学学报, 2006, 38(3): 315-320.
[6] 闻伟. 电力电子级联系统动态特性与控制研究[D]. 北京：中国科学院研究生院, 2006.
[7] 王建华, 张方华, 龚春英, 等. 电压控制型Buck DC/DC 变换器输出阻抗优化设计[J]. 电工技术学报, 2007, 22(8): 18-23.
[8] Li P, Lehman B. Performance prediction of DC-DC converters with impedances as loads[J]. IEEE Transactions on Power Electronics, 2004, 19(1): 201-208.
[9] Feng X G, Lee F C. On-line measurement on stability margin of DC distributed power system[C]. Applied Power Electronics Conference (APEC) 2000, 15th Annual IEEE, 2000, 2: 1190-1195.
[10] Liu J J, Feng X G, Lee F C. Stability margin monitoring for DC distributed power systems via perturbation approaches[J]. IEEE Transactions on Power Electronics, 2003, 18(6): 1254-1261. |
|
|
|
2009, Vol. 24 
