电工技术学报  2017, Vol. 32 Issue (4): 12-24    DOI:
电力电子 |
基于变频-移相混合控制的L-LLC谐振双向DC-DC变换器
吕正1, 颜湘武1, 孙磊2
1. 新能源电力系统国家重点实验室(华北电力大学) 北京 102206;
2. 河北农业大学机电工程学院 保定 071001
A L-LLC Resonant Bidirectional DC-DC Converter Based on Hybrid Control of Variable Frequency and Phase Shift
Lü Zheng1, Yan Xiangwu1, Sun Lei2
1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China;
2. College of Mechanical and Electrical Engineering Agricultural University of Hebei Baoding 071001 China
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摘要 随着储能系统的不断发展及其在直流分布式系统中的广泛应用,充当储能与直流分布式系统能量交互接口,调节范围宽、运行效率高的双向直流变换器得到深入的研究。提出一种基于变频-移相混合控制的L-LLC谐振双向直流变换器,具备宽泛的增益及功率范围,可实现输入侧开关管的零电压开通和输出侧整流管的零电流关断,运行效率高。对变频-移相控制下L-LLC的运行状态及特性进行了精确的描述分析,从理论层面论证采用变频-移相混合控制的合理性并提出一种简单的变频-移相混合控制实现方法。样机实验结果验证了L-LLC谐振双向直流变换器理论分析的正确性及其在运行效率和调节范围两方面性能的优越性。
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关键词 双向直流变换器 模态分析 变频模式 移相模式 混合控制    
Abstract:Considering the development and application of the energy storage systems in DC distribution system, bidirectional DC-DC converters with high power conversion efficiency and wide adjustable range are required. According to the hybrid control of variable-frequency (VF) and phase-shift (PS), a L-LLC resonant bidirectional DC-DC converter was proposed in this paper. It not only has wide adjustable ranges of the DC voltage gain and the transmission power, but also can realize the zero-voltage switching for input switches and zero-current switching for output rectifiers simultaneously. That leads to a high overall efficiency. Operation behaviors and characteristics of the converter under single VF or PS control were described. Then the rationality of the hybrid control was proved in theory, and an easy implementation was given. The experimental results of the prototype confirmed the validity of the theoretical analysis as well as the superior performance of L-LLC converter in operational efficiency and adjustable range.
Key wordsBidirectional DC-DC converter    operation mode analysis    variable-frequency pattern    phase-shift pattern    hybrid control   
收稿日期: 2016-07-20      出版日期: 2017-03-01
PACS: TM46  
基金资助:国家高技术研究发展计划(863计划)资助项目(2015AA050603)
通讯作者: 吕 正 男,1988年生,博士研究生,研究方向为智能功率变换技术及中低压直流分布式系统等。E-mail: lvzhengbaobao@126.com   
作者简介: 颜湘武 男,1965年生,博士,教授,研究方向为电力电子控制技术、风力发电控制技术和动力电池充放电控制技术等。E-mail: xiangwuy@163.com
引用本文:   
吕正, 颜湘武, 孙磊. 基于变频-移相混合控制的L-LLC谐振双向DC-DC变换器[J]. 电工技术学报, 2017, 32(4): 12-24. Lü Zheng, Yan Xiangwu, Sun Lei. A L-LLC Resonant Bidirectional DC-DC Converter Based on Hybrid Control of Variable Frequency and Phase Shift. Transactions of China Electrotechnical Society, 2017, 32(4): 12-24.
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