One-Cycle Control for a Double-Input DC/DC Converter

One-Cycle Control for a Double-Input DC/DC Converter
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双输入 DC/DC 转换器的单周期控制

DOI:
10.1109/tpel.2011.2164582
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发表时间:
2012-11
影响因子:
6.7
通讯作者:
Ruan, Xinbo
Ruan, Xinbo
中科院分区:
工程技术1区
文献类型:
--
作者:
Yang, Dongsheng;Yang, Min;Ruan, Xinbo

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在混合电力系统中,使用多输入转换器(MIC)代替多个单输入转换器导致电路更简单且成本更低。中等收入国家始终需要进行能源管理,以确保最大限度地利用可再生能源。基于MIC的混合动力系统是一个典型的多输入多输出耦合系统,具有多种运行模式。因此,控制器的设计非常复杂。本文提出了双输入降压变换器(DIBC)的单周控制(OCC),以消除控制回路的相互作用,从而简化控制器的设计。进一步提出了模式转换电路,根据可用的可再生能源和输出功率实现无缝模式转换。推导了DIBC在不同工作模式下的小信号模型。可以看出,使用OCC时,两个控制回路相互独立,不需要电流调节器。而且,输出电压调节器在不同操作模式下的设计条件是相同的。因此,控制器的设计大大简化。一个800-W的原型已经建成,并在实验室进行了测试,实验结果验证了所提出的OCC。
In hybrid power systems, the use of a multiple-input converter (MIC) instead of several single-input converters leads to a simpler circuit and lower cost. Energy management is always required for the MICs in order to ensure the highest utilization of renewable energy. The MIC-based hybrid power system is a typical multiple-input multiple-output coupling system, and it has multiple operating modes. As a result, the design of the controllers is very complicated. This paper proposes one-cycle control (OCC) for double-input buck converter (DIBC) to eliminate the interactions of the control loops and, thus, to simplify the design of the controllers. The mode transition circuit is further proposed to realize seamless mode transition, according to the available renewable energy and the output power. Small signal models of DIBC in different operating modes are derived. It can be seen that with OCC, the two control loops are independent of each other, and no current regulator is required. Moreover, the design conditions of the output voltage regulator in different operating modes are the same. As a result, the controller design is greatly simplified. An 800-W prototype has been built and tested in the lab and the experimental results validate the proposed OCC.
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