Adaptive Active Capacitor Converter for Improving Stability of Cascaded DC Power Supply System
Adaptive Active Capacitor Converter for Improving Stability of Cascaded DC Power Supply System
复制标题
提高级联直流电源系统稳定性的自适应有源电容变换器
DOI：
10.1109/tpel.2012.2213268
复制
发表时间：
2013-04
影响因子：
6.7
通讯作者：
Tse, Chi K.
中科院分区：
文献类型：
--
作者：
Zhang, Xin;Ruan, Xinbo;Kim, Hyok;Tse, Chi K.
变换器级联是直流分布式电源系统的一种基本结构.单独设计的变换器之间的阻抗相互作用可能使级联系统不稳定。以往提出的级联系统稳定方法需要修改电源和/或负载变换器的内部结构，如拓扑结构和控制电路，这与直流DPS的模块化特性相矛盾。本文提出了一种自适应有源电容变换器（AACC）来稳定级联系统。AACC与级联系统的中间母线并联，只需检测母线电压，而不需要对现有子系统进行任何更改。因此，它可以被设计为直流DPS的标准模块。AACC作为一个等效的总线电容，以减少源变换器的输出阻抗，从而避免与负载变换器的输入阻抗的交叉，因此，级联系统变得稳定。AACC所模拟的等效母线电容根据级联系统的输出功率自适应调整，从而使AACC的功率损耗最小，系统的动态响应优于采用无源电容的系统。此外，由于AACC中不需要电解电容器，因此延长了级联系统的寿命。本文讨论了AACC的工作原理、控制和设计考虑，并建立了一个由两个移相全桥变换器组成的480 W级联系统。实验结果验证了所提出的AACC的有效性。
Connecting converters in cascade is a basic configuration of dc distributed power systems (DPS). The impedance interaction between individually designed converters may make the cascaded system unstable. The previous presented approaches of stabilizing the cascaded systems need to modify the source and/or load converter's internal structure such as the topology and control circuit that are contradictory to the modularization characteristic of dc DPS. In this paper, an adaptive active capacitor converter (AACC) is introduced to stabilize the cascaded system. The AACC is connected in parallel with the cascaded system's intermediate bus and only needs to detect the bus voltage without any change of the existing subsystems. Hence, it can be designed as a standard module for dc DPS. The AACC serves as an equivalent bus capacitor to reduce the output impedance of the source converter, thus avoiding the intersection with the load converter's input impedance, and as a result, the cascaded system becomes stable. The equivalent bus capacitor emulated by the AACC is adaptive according to the output power of the cascaded system, and thus, the power loss of AACC is minimized and the dynamic response of the system is better than that of the system using a passive capacitor. Furthermore, since no electrolytic capacitor is needed in the AACC, the cascaded system's lifetime is prolonged. The operation principle, control, and design consideration of the AACC are discussed in this paper, and a 480 W cascaded system comprising two phase-shifted full-bridge converters has been built and evaluated. The experimental results verify the validity of the proposed AACC.
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DOI：
10.1109/pesc.1989.48485
发表时间：
1989-06
期刊：
20th Annual IEEE Power Electronics Specialists Conference
影响因子：
--
作者：
L. R. Lewis;B. Cho;F. C. Lee;B. A. Carpenter
通讯作者：
L. R. Lewis;B. Cho;F. C. Lee;B. A. Carpenter
DOI：
10.1109/7.869517
发表时间：
2000-07
期刊：
IEEE Trans. Aerosp. Electron. Syst.
影响因子：
--
作者：
S. P. Karatsinides
通讯作者：
S. P. Karatsinides
影响因子：
4.4
作者：
F. Blaabjerg;A. Consoli;J. Ferreira;J. V. van Wyk
通讯作者：
F. Blaabjerg;A. Consoli;J. Ferreira;J. V. van Wyk
影响因子：
6.7
作者：
Xiaogang Feng;Jinjun Liu;F. Lee
通讯作者：
Xiaogang Feng;Jinjun Liu;F. Lee
影响因子：
6.7
作者：
Jiabin Wang;D. Howe
通讯作者：
Jiabin Wang;D. Howe