摘要
在新能源发电系统中，现有的多输入直流变换器不能同时具有电路结构简单、磁元件少、电压增益高、开关器件电压应力低等优点。该文提出3种基于开关电容的单电感高增益双输入Boost变换器拓扑，详细分析更优拓扑的工作原理和开关电容的充放电特性，提出了能量管理控制方案。变换器能够根据新能源端口的供电变化和负载需求灵活地切换工作模式，适应于新能源随机性和间接性发电的特点，提高系统供电可靠性；开关电容在不同工作模式下均发挥升压作用使其具有高利用率。实验结果验证拓扑的可行性及其控制方案的正确性。
In the renewable generation system, the existing multiple-input DC-DC converters can not have the advantages of simple circuit structure, less magnetic components, high voltage gain and low voltage stress of switch devices at the same time. This paper presents three kinds of dual-input Boost converter topologies with single-inductor based on switched-capacitor, and analyzes the working principle and switched-capacitor＇ s charge-discharge features of the better one. Besides, energy management control scheme is also proposed. The proposed converter can change the operating mode automatically according to the input new energy source and the demand of load power, which adapts to the new energy characteristics of randomness and intermitteney and enhances the reliability of power supply system. Switched-capacitor plays an important role to improve the voltage gain in every operating mode and has a high utilization rate. The experimental results verify the feasibility of the topology and its correctness of control scheme.
作者
周悦
耿晓珑
孙孝峰
王宝诚
Zhou Yue, Geng Xiaolong, Sun Xiaofeng, Wang Baocheng(Key Lab of Power Electronics for Energy Conservation ＆ Motor Drive of Hebei Province （College of Electrical Engineering, Yanshan University）, Qinhuangdao 066004, China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2018年第3期797-806,共10页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51077112)
河北省自然科学基金(E2015203407
13211907D-2)
秦皇岛市科学技术研究与发展计划(201703A002)
关键词
直流变换器
能量管理
开关电容
高增益
充放电特性
multiple-input
DC-DC converters
energy management
switched-capacitor
high-gain
charge-discharge features
