Decentralized Voltage-Sharing Control Strategy for Fully Modular Input-Series–Output-Series System With Improved Voltage Regulation
Decentralized Voltage-Sharing Control Strategy for Fully Modular Input-Series–Output-Series System With Improved Voltage Regulation
复制标题
DOI：
10.1109/tie.2014.2365433
复制
发表时间：
2015-05
影响因子：
7.7
通讯作者：
Wu Chen;Guangjiang Wang
中科院分区：
文献类型：
--
作者：
Wu Chen;Guangjiang Wang
直流变换器的输入-串联-输出-串联（ISOS）系统连接适用于高输入电压和高输出电压的应用。ISOS系统各组成模块的输入电压和输出电压必须保证共享。本文提出了一种新颖的分散电压共享控制策略，该策略具有全模块化和高可靠性的优点，每个模块独立控制，不与其他模块进行任何控制通信。为了保证输入输出电压的合理共享，在各模块的参考电压上加入输入电压传感信号，形成了ISOS系统输出电压梯度正调节特性；此外，还引入了系统输出移压回路，提高了系统的电压调节能力。所提出的控制策略可以有效地提高ISOS系统的模块化和可靠性。在实验室测试了一个由三个双晶体管正激变换器模块组成的ISOS系统原型，实验结果验证了控制策略的有效性。
Input-series-output-series (ISOS) system connection of dc-dc converters is suitable for high-input-voltage and high-output-voltage applications. Input voltage sharing and output voltage sharing of the constituent modules among the ISOS system must be ensured. This paper proposes a novel decentralized voltage-sharing control strategy, which has the advantages of full modularity and high reliability, and each module is controlled independently without any control communication with other modules. In order to ensure proper sharing of input and output voltages, the input voltage sensing signal is added to the reference voltage for each module, resulting in the positive output voltage gradient regulation characteristic of the ISOS system; moreover, a system output voltage shifting loop is introduced to improve the system voltage regulation. The proposed control strategy can effectively improve the modularity and reliability of the ISOS system. An ISOS system prototype consisting of three two-transistor forward converter modules is tested in the laboratory, and the experimental results verify the effectiveness of the control strategy.