Study of Bi-directional DC-DC Converter of Micro-grid Hybrid Energy Storage System

被引：0
|
作者：
Jin Li-jun [1 ,2 ]
Yang Guang-yao [1 ]
Jiang Miao-miao [1 ]
Cheng Yi-fan [1 ]
Zhu Hai-peng [3 ]
Zhou Ke [3 ]
机构：
[1] Tongji Univ, Sch Informat Engn, Shanghai 200092, Peoples R China
[2] State Key Lab Elect Insulat & Power Equipment, Xian, Peoples R China
[3] Tongji Univ, Jining Power Supply Co, Shandong Elect Power Corp, Shanghai 200092, Shandong, Peoples R China
来源：
PROCEEDINGS OF THE 2015 10TH IEEE CONFERENCE ON INDUSTRIAL ELECTRONICS AND APPLICATIONS | 2015年
关键词：
Buck/Boost bi-directional converter; dc bus voltage; hybrid energy storage; super capacitor; battery;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hybrid energy storage can take advantage of super capacitor's high power density and battery's high energy density. At the same time, hybrid energy storage cost less. So it's suitable for micro-grid power balance control. This paper presents a main circuit structure which is Buck/Boost converters connecting super capacitor and battery with PWM (pulse width modulation) inverter to achieve bi-directional power adjustment and improve utilization of super capacitor. DC bus voltage is sensitive to and fluctuates with switching of PWM inverter's working conditions. To solve this problem a combination of voltage-current close loop control and power feed-forward control is adopted in super capacitor control while achieving fast power tracking; peak current control is adopted in battery control, this control strategy has simple control circuit and high reliability. Meanwhile peak current control can limit maximum current of battery, so it can protect battery and prolong battery life. Simulation confirmed the effectiveness of the method with voltage fluctuations within the range of 10%.
引用
收藏
页码：1171 / 1174
页数：4
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