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首页> 外文期刊>Power Electronics, IET >AC-DC-DC isolated converter with bidirectional power flow capability
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AC-DC-DC isolated converter with bidirectional power flow capability

机译：具有双向潮流能力的AC-DC-DC隔离转换器

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摘要

A novel AC-DC-DC isolated converter with bidirectional power flow capability is proposed and studied. The proposed structure consists of a three-phase current source converter and a special DC-DC isolated converter. In this DC-DC converter, the primary side of the high-frequency transformer is a current source converter and the secondary side is a voltage source converter. Based on this novel topology, a simple and efficient control strategy using the voltage of the inductor in the DC-side to control the current of the AC-side is presented. The feature of the bidirectional power flow allows the converter to provide energy as a power source or to regenerate power back to the AC power grid with high overall energy efficiency. Another feature of this converter is that the DC-side current and voltage can be regulated in a wide range from zero to the rating value. Furthermore, the AC-side current and voltage have low total harmonic distortion and unit power factor in a wide output power range. The operation of the proposed topology and control scheme are confirmed by the experimental results on a 10 kW design example.
机译：提出并研究了一种新型的具有双向潮流能力的AC-DC-DC隔离变换器。拟议的结构包括一个三相电流源转换器和一个特殊的DC-DC隔离转换器。在该DC-DC转换器中，高频变压器的初级侧是电流源转换器，并且次级侧是电压源转换器。基于这种新颖的拓扑结构，提出了一种简单有效的控制策略，该策略利用直流侧电感器的电压来控制交流侧电流。双向功率流的特征允许转换器以高的整体能量效率将能量提供为电源或将功率再生回交流电网。该转换器的另一个特点是可以在从零到额定值的宽范围内调节直流侧电流和电压。此外，在宽输出功率范围内，交流侧电流和电压具有较低的总谐波失真和单位功率因数。在一个10 kW设计实例上的实验结果证实了所提出的拓扑和控制方案的运行。

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