基于双重移相的双向有源全桥DC-DC变换器优化控制策略

doi:10.16180/j.cnki.issn1007-7820.2023.12.012

摘要/Abstract

摘要：

针对双向有源全桥变换器存在回流功率过大、开关器件硬开通损耗以及动态响应速度较差等问题,文中基于双重移相控制提出一种虚拟直接功率的回流功率优化方法。通过对双重移相控制下的工作原理及工作特性进行分析,推导出零电压开关软开关边界,并以软开关为约束条件,利用KKT(Karush-Kuhn-Tucker)条件优化算法得到全功率范围内的回流功率优化方案。该方案与所提虚拟直接功率法相结合并同时作用,当运行状态发生变化后,系统不仅可以有效减小变换器的回流功率,而且也能够增强变换器的动态响应速度。最后搭建MATLAB/Simulink仿真模型以及小功率变换器实验样机,通过不同控制策略下的对比实验,验证了该策略的正确性以及优越性。

关键词: 双向有源全桥变换器, 双重移相控制, 软开关, KKT, 回流功率, 虚拟直接功率控制, 动态性能

Abstract:

In view of the problem of high backflow power, the hard opening loss of the switching device and poor dynamic performance of bidirectional active full-bridge converter,a control scheme based on dual phase shifting combining backflow power optimization and virtual direct power control is proposed in this study. By analyzing the working principle and working characteristics of the dual phase shift control, the soft switching boundary of zero voltage switching is derived as the constraint condition,with the soft switching as the constraint condition, The blackflow power optimization scheme in the whole power range is obtained by KKT(Karush-Kuhn-Tucker) conditional optimization algorithm.This scheme is combined with virtual direct power method and works simultaneously.When the operation condition changes,it could not only reduced effectively backflow power,but also enhance fast dynamic response.Finally,the MATLAB/Simulink simulation model and a small power converter prototype is built for the comparison experiment to verify the correctness and superiority of the proposed control strategy.

Key words: bi-directional active full bridge converter, dual-phase-shift control, soft switch, KKT, backflow power, virtual direct power control, dynamic performance

中图分类号:

TP273

李玉东,罗新全,李佩峰,黄鑫. 基于双重移相的双向有源全桥DC-DC变换器优化控制策略[J]. 电子科技, 2023, 36(12): 87-94.

LI Yudong,LUO Xinquan,LI Peifeng,HUANG Xin. Optimal Control Strategy for Bi-Directional Active Full Bridge DC-DC Converter Based on Dual Phase Shift[J]. Electronic Science and Technology, 2023, 36(12): 87-94.

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参数	数据
输入电压U₁/V	100
参考电压U_2ref/V	60
输入端电容C₁/μF	470
负载端电容C₂/μF	470
开关频率f/kHz	10
电感L/μH	50
变压器变比n	1