采用零电压移相全桥变换器的电力电子变压器的仿真研究

Simulation Research of Power Electric Transformer with ZVS Full-Bridge Phase-Shift DC/DC Converter

将可以实现软开关功能的零电压(ZVS)移相全桥直流变换器应用于电力电子变压器中,分析其各个环节的作用并设定相应的控制策略,仿真结果表明:该变换器在电力电子变压器中仍然可以实现软开关功能,适合工作于高频状态下,有利于降低装置的体积和提高装置的工作效率。通过采用合适的控制策略,电力电子变压器的输入电流和输出电压波形情况良好,证明电力电子变压器在实现电压等级变换和能量传递的基本功能的同时,还具备应对电压波动和网侧谐波含量大等电能质量问题的功能。

This paper adopts the full-bridge phase-shift DC/DC converter which has the function of realizing zero voltage switching into power electronic transformer,analyses the functions of every part and uses proper control strategy.The simulation results showed that this converter could still realize the function of soft-switching in PET and it was appropriate to work in high frequency state to reduce the size and improve the efficiency of the device.The simulation waveform input current and output voltage of PET were in good condition,which proves that PET has the ability of dealing with power quality problem such as voltage fluctuation and web side harmonic as well as realizing voltage level transformation and energy transfer.MoreBack AbstractFilter（＇EnChDivSummary＇,＇ChDivSummaryMore2＇,＇ChDivSummaryReset2＇）; 【Keywords in Chinese】 零电压移相全桥变换器; 电力电子变压器; 电能质量; 【Key words】 ZVS full-bridge phase-shift DC/DC converter; power electronic transformer; power quality;