A high-performance bidirectional DC-DC converter for DC micro-grid system application
A high-performance bidirectional DC-DC converter for DC micro-grid system application
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一种用于直流微电网系统应用的高性能双向DC-DC变换器
DOI：
10.1109/ipec.2014.6870142
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
C. S. Yang
中科院分区：
文献类型：
--
作者：
Shu;Yu;H. Chiu;Shih;Chung;C. S. Yang
提出了一种适用于直流微电网系统的高效率双半桥双向DC-DC变换器。讨论了所研究的双向变换器的工作原理和设计考虑。在大范围负载变化的情况下，可以实现零电压开关特性和自适应移相控制方法。当电源从DC_BUS侧流向电池侧时。设计了一种三阶段充电方法，既满足了快速充电的要求，又防止了电池过充，延长了磷酸铁锂电池的使用寿命。另外，采用数字信号处理（DSP）控制芯片实现了双向DC-DC变换器的功率流控制、DC_BUS电压调节和电池充放电。搭建了一台10 kW的实验室样机，并进行了微网应用试验。实验结果验证了该方案的可行性。高效率的性能，可以实现所研究的自适应相移控制方法和零电压开关特性。样机在放电模式和充电模式下的峰值效率均在98%以上。
This paper presents a high efficiency dual-half-bridge bidirectional DC-DC converter for DC micro-grid system applications. The operating principle and design consideration of the studied bidirectional converter are discussed. The zero-voltage-switching features and an adaptive phase-shift control method can be achieved under wide-range load variations. When power flow through from DC_BUS side to the battery side. A three-stage charging method is designed to meet the fast-charging demand and prevent battery overcharging to prolong the life-time of LiFePO4 batteries. Otherwise, a digital-signal-processing (DSP) control IC is used to realize the power flow control, DC_BUS voltage regulation and battery charging/discharging of the studied bidirectional DC-DC converter. A 10kW laboratory prototype converter with E-CAN communication function is built and tested for DC micro-grid system applications. The experimental results are shown to verify the feasibility of the proposed scheme. High efficiency performance can be achieved by the studied adaptive phase-shift control method and zero-voltage switching features. The measured Peak efficiency of the prototype converter expect to higher than 98% under discharging mode and charging mode.