双Buck/Boost集成双有源桥三端口DC-DC变换器  

Dual Buck/Boost Integrated Dual Active Bridge Three-Port DC-DC Converter

作　　者：孙孝峰[1] 刘飞龙[1] 熊亮亮[1] 王宝诚[1] Sun Xiaofeng Liu Feilong Xiong Liangliang Wang Baocheng(Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei ProvinceYanshan University Qinhuangdao 066004 Chin)

机构地区：[1]燕山大学电力电子节能与传动控制河北省重点实验室,秦皇岛066004

出　　处：《电工技术学报》2016年第22期73-82,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51077112);河北省自然科学基金(E2012203163)资助

摘　　要：在传统的双有源桥变换器的基础上集成两个双向Buck/Boost电路,提出了一种双Buck/Boost集成双有源桥三端口DC-DC变换器,该变换器实现了桥臂开关管的复用,提高了功率密度。以光伏-蓄电池混合发电系统为例对该变换器拓扑进行分析,采用移相+PWM进行控制,通过控制移相角实现输入与输出端口间功率传输,通过调节占空比来匹配输入端口电压等级,以实现光伏端口的最大功率点跟踪和平衡蓄电池端口的能量传递。分析了该变换器的工作原理、稳态与软开关特性,该变换器较大程度地改善了传统移相控制下DAB在移相角较小时的软开关条件,使得在宽工作范围内能够实现所有功率开关管的软开关。最后建立300W实验样机进行方案验证。In this paper, Dual Buck/Boost integrated dual active bridge （DAB） three-port DC-DCconverter combines the conventional DAB and two bidirectional Buck/Boost circuits. Hence powerswitches are shared, and the power density is improved. The PV-battery hybrid power system is takenas an example to analyze the proposed converter topology. The phase shift plus PWM control is adoptedhere. The phase shift angle is used to control the power flow between the input port and the output port,while the duty cycle is employed to match the input voltages. Thus the maximum power point tracking（MPPT） can be achieved and the power flow between PV and battery can be balanced. The basicoperation principles, steady state characteristics and zero voltage switching （ZVS） conditions areanalyzed. The ZVS conditions for the conventional DAB operating in small phase shift angle can begreatly improved, and thus the converter can operate under ZVS in a wide operation range. A 300 Wconverter prototype is built to verify all considerations.

关 键 词：多端口变换器 双向Buck/Boost电路 双有源桥电路 软开关 移相+PWM控制 

分 类 号：TM46[电气工程—电器]