基于可变电感的双有源桥隔离DC/DC变换器功率控制  

Power Control of Dual-active-bridge Isolated DC/DC Converter Based on Variable Inductance

作　　者：王亮 王春斌 史宇欣 郭卓麾 徐自远 WANG Liang;WANG Chunbin;SHI Yuxin;GUO Zhuohui;XU Ziyuan(Electric Power Research Institute,State Grid Shanxi Electric Power Company,Taiyuan 030001,China;State Grid Shanxi Electric Power Company,Taiyuan 030021,China;Nanjing University(Suzhou)High-tech Research Institute,Suzhou 215000,China)

机构地区：[1]国网山西省电力公司电力科学研究院,太原030001 [2]国网山西省电力公司,太原030021 [3]南京大学(苏州)高新技术研究院,苏州215000

出　　处：《电源学报》2024年第4期66-73,共8页Journal of Power Supply

摘　　要：针对传统双有源桥DAB(dual-active-bridge)变换器存在开关损耗大、循环电流大、负载变化范围窄且运行效率偏低等问题,提出1种基于可变电感和移相PS(phase shift)角相结合的新型双有源桥变换器功率控制方法。该方法将可变电感和移相角作为主要控制参数,以提升DAB在更宽的负载变化范围内的运行效率。此外,将DAB变换器的传递函数线性化,以提高控制器的实用性和便利性。基于所提方法中器件饱和可控,通过减小磁芯尺寸来优化变换器尺寸。最后,通过实验验证了所提方法的有效性和优越性,结果表明在最大PS角条件下,电感变化显著影响DAB变换器的功率传输,在轻载和重载条件下,其整体运行效率均比传统DAB变换器高约5%。Aimed at the problems of a traditional dual-active-bridge (DAB) converter such as large switching loss,large circulating current,narrow range of load variation and low operating efficiency,a novel power control method for DAB converter based on variable inductance and phase shift (PS) angle is proposed,in which the variable inductance and PS angle are taken as the main control parameters to improve the operating efficiency of the DAB converter in a wider range of load variations.In addition,the transfer function of the DAB converter is linearized to improve the practicality and convenience of the controller.Because the device saturation is controllable in the proposed method,the core size can be reduced to optimize the converter size.Finally,the effectiveness and superiority of the proposed method were verified by experiments.Results show that under the condition of maximum PS angle,the inductance variation significantly affected the power transmission of the DAB converter,and its overall operating efficiency was about 5% higher than that of the traditional DAB converter under both the light and heavy load conditions.

关 键 词：可变电感 双有源桥 DC/DC变换器 高频变压器 

分 类 号：TM28[一般工业技术—材料科学与工程]