Bidirectional isolated dual active bridge is a vital component for low voltage distribution network. Conventionally dual active bridge is operated using single phase shift control technique. At unity voltage conversion ratio, it operates efficiently, but when voltage conversion ratio differs from unity, its efficiency decreases and current stress increases due to more reactive power. Moreover, voltage obtained at primary side of high frequency transformer is of 2‐level only, which increases voltage stress across switching devices. Furthermore, it has only one degree of freedom, which confines its ability to regulate power flow. In this paper, a transistor clamped dual active bridge DC‐DC converter is proposed with three degrees of freedom, which improves its ability to regulate power flow, and because of incorporation of 5‐level voltage on primary side of high frequency transformer, current stress in switches decreases significantly. It also leads to reduction in voltage stress across switching devices. Modeling of the proposed converter has been carried out to obtain power flow equation. In addition to the phase shift control, proposed converter has two more control parameter, which enhances the power flow controllability of the converter. It has higher efficiency as compared to conventional 2‐level DAB. Performance of the proposed converter is validated via simulation and experimentation on developed laboratory prototype.

中文翻译：

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晶体管钳位双有源桥DC-DC转换器可降低低压配电网络中的电压和电流应力

双向隔离双有源桥是低压配电网络的重要组成部分。常规地，双有源桥使用单相移控制技术来操作。在单位电压转换比下，它可以高效地工作，但是当电压转换比与单位电压不同时，由于无功功率增加，效率降低，电流应力增加。此外，在高频变压器的初级侧获得的电压仅为2级，这会增加开关设备上的电压应力。此外，它只有一个自由度，这限制了它调节功率流的能力。本文提出了一种具有三个自由度的晶体管钳位双有源桥式DC-DC转换器，从而提高了其调节功率流的能力，并且由于在高频变压器的初级侧加入了5级电压，开关中的电流应力显着降低。它还可以降低开关设备两端的电压应力。已经对提出的转换器进行了建模以获得功率流方程。除了相移控制，提出的转换器还具有两个以上的控制参数，从而增强了转换器的潮流控制能力。与传统的2级DAB相比，它具有更高的效率。通过对开发的实验室原型进行仿真和实验验证了拟议转换器的性能。已经对提出的转换器进行了建模以获得功率流方程。除了相移控制，提出的转换器还具有两个以上的控制参数，从而增强了转换器的潮流控制能力。与传统的2级DAB相比，它具有更高的效率。通过对开发的实验室原型进行仿真和实验验证了拟议转换器的性能。已对提出的转换器进行了建模以获得功率流方程。除了相移控制，提出的转换器还具有两个以上的控制参数，从而增强了转换器的潮流控制能力。与传统的2级DAB相比，它具有更高的效率。通过对开发的实验室原型进行仿真和实验验证了拟议转换器的性能。