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电流型双有源桥式DC-DC变换器的建模与解耦控制
Modeling and Decoupling Control of Current-Fed Dual Active Bridge Bidirectional DC-DC Converter
投稿时间:2018-11-15  修订日期:2018-12-20
DOI:
中文关键词:  电流型双有源桥式双向DC-DC变换器  状态方程  小信号建模  解耦控制
英文关键词:current-fed dual active bridge bidirectional DC-DC converter  equation of state  small signal modeling  decoupling control.
基金项目:湖北省微电网工程技术研究中心开放基金(2015KDW03)
作者单位E-mail
王归新 三峡大学电气与新能源学院 47424715@qq.com 
肖波涛 三峡大学电气与新能源学院 2930729177@qq.com 
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中文摘要:
      对于电流型双有源桥式双向DC-DC变换器,分析了其工作原理与稳态特性。通过列出变换器半周期内的状态方程,对变换器进行小信号建模并推导出系统传递函数。由于系统在进行闭环控制时移相角与占空比之间的相互耦合会降低系统动态性能,因此需要采用解耦控制来解除二者之间的相互耦合,进而提出了一种稳态解耦控制策略。一方面通过建立相对增益矩阵来分析控制量与被控制量间的匹配关系来设计控制器;另一方面基于系统稳态过程增益矩阵得到系统稳态解耦矩阵。两个回路的相互影响通过加入系统稳态解耦矩阵而大大降低。最后通过仿真与实验对所提控制策略的有效性和合理性进行了验证。
英文摘要:
      for the current-fed bidirectional DC-DC converter, its operating principle and steady-state characteristics are analyzed. By listing the state equations in the half-cycle, the small-signal model of the converter is established and the transfer function of the system is derived. Since the intercoupling between the phase shift angle and the duty cycle, which will reduces the dynamic performance of the system during closed-loop control. In order to solve the above problems, a steady-state decoupling control strategy is proposed. On the one hand, To designe controllers, the best pairing of the control volumes and the controlled volumes should be analyzed, which is based on relative gain array; on the other hand, the system steady-state decoupling matrix is obtained based on the system steady-state process gain matrix. The interactions of the two control loops is approximately solved by connecting the steady-state decoupling matrix. Finally, the effectiveness and feasibility of the proposed control strategy areverified by simulation and experimental.
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