输入串联输出并联直流变换器建模与解耦控制

输入串联输出并联直流变换器系统(Input-Series Output-Paralleled，ISOP converter)十分适用于高输入电压大功率场合。每个DC-DC模块输入电压均分、输出电流均流是其正常工作的关键。本文提出的一种新颖的输入均压控制方法，在确保模块输入电压均分、输出电流均流的同时，使得控制各个模块输入电压的同时不影响输出电压的调节，有利于分别独立设计输入电压控制闭环和输出电压的控制闭环。本文选择全桥(Full Bridge，FB)变换器作为基本的DC-DC模块，建立了FB-ISOP小信号数学模型，基于该控制方案将整个FB-ISOP解耦为多个单输入单输出的控制闭环。并以两个全桥输入串联输出并联为例，给出了闭环调解器的设计方法。论文最后给出了实验验证。

Modelling and Decoupling Control of Input-Series Output-Paralleled Converter

The input-series output-paralleled (ISOP) converter are very attractive in the high input voltage and high power conversion applications. The modules of the ISOP converter should be ensured to be input voltage sharing and output current sharing of. A novel input voltage sharing control strategy is proposed in this paper, which is independent of the output voltage regulation, so the input voltage sharing regulator and the output voltage regulator can be designed independently. The small-signal model of the ISOP converter, in which the basic module is full-bridge DC-DC converter, is derived, and based on the proposed control strategy, the ISOP converter is decoupled to several independent single input and single output systems. A ISOP converter consisting of two full-bridge DC-DC modules is taken as the example to illustrate the design of the regulators. A 3kW prototype is fabricated and tested in the lab, and the experimental results verified the proposed control strategy.