CAJ | 학술논문

为满足直流分布式系统间的能量调度需求,提出了一种新颖的双向DC/DC变换器--串联谐振型双重有源全桥变换器.通过对激励谐振、自由谐振和零自由谐振3种模式的分析,详细介绍了以高频谐振电流为基础传递能量的谐振变换器的工作原理.能量的双向传输是通过控制谐振电流来实现的.以不同母线间的电压差作为能量流动方向的判断依据,给出了基于谐振槽瞬时能量控制的双闭环控制方案.实验验证了串联谐振型双重有源全桥变换器工作原理分析的正确性,同时也验证了所提出的直流分布式母线问能量双向流动控制方案的可行性.研究结果表明,该变换器可双向传输能量,所有开关工作于定频、定宽状态,全程可实现零电流开关,能量传输效率高.
위만족직류분포식계통간적능량조도수구,제출료일충신영적쌍향DC/DC변환기--천련해진형쌍중유원전교변환기.통과대격려해진、자유해진화령자유해진3충모식적분석,상세개소료이고빈해진전류위기출전체능량적해진변환기적공작원리.능량적쌍향전수시통과공제해진전류래실현적.이불동모선간적전압차작위능량류동방향적판단의거,급출료기우해진조순시능량공제적쌍폐배공제방안.실험험증료천련해진형쌍중유원전교변환기공작원리분석적정학성,동시야험증료소제출적직류분포식모선문능량쌍향류동공제방안적가행성.연구결과표명,해변환기가쌍향전수능량,소유개관공작우정빈、정관상태,전정가실현령전류개관,능량전수효솔고.
To meet the need of energy dispatch among distributed DC systems, a bidirectional DC / DC converter,the series resonant dual active full-bridge converter,is presented. The powering resonant mode,free resonant mode and zero-free resonant mode are analyzed,and the operating principle of the resonant converter based on high-frequency resonant current is introduced. The bidirectional power flow is actually realized by controlling the resonant current. A dual close-loop control strategy based on the instantaneous energy control of resonant tank is given where the power flow direction is determined by the voltage difference between the distributed DC buses. The correctness of the working principle analysis and the feasibility of the control strategy are proved by the experiments. The study shows that, the bidirectional power flow is realized,the switch operates in constant-frequency and constant-width,ZCS is implemented within load range and the energy conversion efficiency is high.