CAJ | 학술논문

光伏发电系统中输出电压随光强变化波动较大,为保证正常并网逆变,需要一种高增益的直流变换器将光伏输出电压提升到常规直流母线电压.这里主要研究一种基于Boost拓扑、Flyback拓扑的升压反激式变换器(BFC)在太阳能光伏发电系统的应用.BFC将Boost拓扑与Flyback拓扑输入并联、输出串联,反激拓扑中的初级线圈电感同时作为Boost拓扑的输入电感,变压器的漏感能量得到了利用.仿真结果表明,新型BFC直流变换器应用于光伏发电系统时,具有提高输出电压增益,减小电压纹波,跟踪效果更好等优点.
광복발전계통중수출전압수광강변화파동교대,위보증정상병망역변,수요일충고증익적직류변환기장광복수출전압제승도상규직류모선전압.저리주요연구일충기우Boost탁복、Flyback탁복적승압반격식변환기(BFC)재태양능광복발전계통적응용.BFC장Boost탁복여Flyback탁복수입병련、수출천련,반격탁복중적초급선권전감동시작위Boost탁복적수입전감,변압기적루감능량득도료이용.방진결과표명,신형BFC직류변환기응용우광복발전계통시,구유제고수출전압증익,감소전압문파,근종효과경호등우점.
The output voltage of photovoltaic power generation system changes with light intensity. In order to ensure nor-mal grid-connected inversion,a high-gain DC/DC converter is needed to elevate the PV output voltage to normal level. The appli-cation of boost-flyback converter (BFC) based on boost topology and flyback topology in photovoltaic power generation systems is discussed. The BFC puts the inputs of boost topology and fly-back topology in parallel and puts the outputs of them in series. At the same time,the primary coil inductance of flyback topology is used as input inductance of boost topology,by which the leakage inductance of transformer is used fully. Simulation results show when BFC is applied to PV power generation system , BFC has the advantages of elevating the output voltage gain and reduce the voltage ripple,and has better tracking effect.