基于虚拟功率控制双向有源全桥电路电流应力优化  

Improved Resonant Boost Converter with Three-Winding Transformer

作　　者：黄亚峰[1] 孙晓清 严干贵[1] 王淳民 吴光琴 Huang Yafeng;Sun Xiaoqing;Yan Gangui;Wang Chunmin;Wu Guangqin(College of Electrical Engineering,Northeast Electric Power University,Jilin Jilin 132012)

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012

出　　处：《东北电力大学学报》2020年第5期17-25,共9页Journal of Northeast Electric Power University

基　　金：国家自然科学基金委员会-国家电网公司智能电网联合基金项目(U1866601);吉林省科技发展计划项目(20160101346JC)。

摘　　要：为了减小双有源全桥DC-DC变换器的电流应力,提高变换器的效率,同时显著增强变换器的动态性能,文中在双重相移控制的基础上提出一种基于虚拟功率的电流应力优化方法.该方法通过建立变换器输出电压的虚拟功率模型,同时结合电流应力优化计算,可以实现变换器效率优化并显著地提高其对于负载突变和输入电压突变的响应能力.同时,该方法可以有效地改善变换器的起动特性,使得输出电压在无明显超调的情况下直接达到给定电压值.最后,搭建了基于PSIM软件的双有源全桥DC-DC变换器仿真模型,以传统的单重相移控制方法和双相移电流应力优化控制为参考,对所提出的基于虚拟功率的电流应力优化方法进行对比仿真,仿真结果验证了所提控制方法的正确性与有效性.In this paper,a improved resonant boost converter with three-winding transformer is proposed.The active clamping technology is adopted at the primary side,which not only suppress voltage spikes,but also provides zero-voltage turn-on switching and the core reset of transformer,thus the utilization of the transformer is improved.The resonant soft switching technology is used in the secondary side to achieve the zero-current turn-off switching of diodes,eliminate the reverse recovery problem and reduce the switching losses.Since the high frequency transformer adopts three-winding structure,the voltage stress of the secondary winding is reduced,and the forward-flyback mode is conducted alternately to improve the overall efficiency of the converter.The working mode of the DC-DC converter is analyzed in detail in this paper,and the design method of the main power circuit parameters is given.Finally,a 400W prototype is implemented,the experimental results verify the theoretical analysis and the feasibility of design of this paper.

关 键 词：双有源全桥DC-DC变换器 双相移 电流应力优化 虚拟功率 动态响应 

分 类 号：TM46[电气工程—电器]