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Power electronic transformer based on cascaded H-bridge converter

机译:基于级联H桥转换器的电力电子变压器

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摘要

In this paper the control strategy of power electronic transformer (PET) is proposed. The analyzed structure of PET uses two seven-level cascaded H-bridge (CHB) rectifiers. The electrical power of PET is transferred between DC-links of CHB converters using dual-active-bridges (DABs) and low voltage high frequency transformers. The roposed solution allows for controlling the active and reactive power with a low level of harmonic distortions. The DC-link voltages and the load of the utilized H-bridges are controlled using appropriate modulation strategy. The theoretical issues are confirmed by simulation and experimental results.
机译:提出了电力电子变压器(PET)的控制策略。PET的分析结构使用两个七电平级联H桥(CHB)整流器。PET的电力通过双有源电桥(DAB)和低压高频变压器在CHB转换器的直流链路之间传输。推荐的解决方案允许在低谐波失真水平下控制有功和无功功率。使用适当的调制策略控制所用H桥的直流链路电压和负载。仿真和实验结果证实了理论问题。

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