摘要
研究了一种新型LCL谐振型双有源全桥双向DC-DC变换器。根据LCL谐振网络的基本特性,在双移相控制方式下,使得初、次级全桥的交流侧电压与电流同相位,实现了单位功率因数,基本可以消除双有源全桥变换器中普遍存在的回流功率。在时域波形分析的基础上,建立了各次谐波的交流等效模型,计算了各次谐波传输功率相对于基波传输有功功率的比值,并通过基波近似法进一步研究了变换器的功率传输特性。最后,设计了一台额定功率为3.6kW的实验样机,特征波形、回流功率的实验与分析结果吻合,并验证了其运行在宽负载电压和功率范围内的良好特性。
A novel dual active bridge（DAB）DC-DC converter based on LCL resonant network is analyzed.According to the basic characteristics of LCL resonant network,AC side voltage and current in primary and secondary full-bridges have the same phase under the dual phase shift（DSP）control,and unit power factor is achieved.Thus the backflow power generally existing in the DAB converter can be eliminated.Based on a time-domain waveform analysis,AC equivalent model of each harmonic has been developed,and the transmission power ratio of each harmonic relative to fundamental active power is calculated.The power transmission characteristics of the converter are further investigated through fundamental harmonic approximation.Finally,a 3.6kW experimental prototype has been designed,and waveform characteristics and backflow power experiment data are in good agreement with the theoretical analysis.Experimental results also verify its excellent properties over a wide load voltage and power range.
出处
《电力系统自动化》
EI
CSCD
北大核心
2016年第19期82-86,93,共6页
Automation of Electric Power Systems
基金
北京市科技计划项目(Z141100004014019)~~
