摘要
电流型开关逆变器(CFSI)是一种高增益的逆变器拓扑结构,适用于输入直流电源电压有限的场合,如屋顶太阳能。交流输出和直流输入之间非常高的阶跃比以及固有的直通保护,使其适合于低功率独立逆变器应用场合。提出了一种新的采用驱动交错拓扑PWM方案的CFSI交错拓扑结构(ICFSI),以提高其额定功率。介绍了ICFSI的各种工作模式以及所提PWM方案的稳态模型和动态分析,与CFSI相比,最大交流增益提高了33%。最后推导并验证了ICFSI的小信号模型,对CFSI和ICFSI的损耗进行了比较分析。仿真结果表明,在额定功率为600 W时,交错运行可使效率提高4%,实验室研制的600 W样机证明了仿真结果的有效性。
Current fed switched inverter(CFSI)is a kind of high gain inverter topology structure,which is suitable for the occasions with limited input DC power supply voltage,such as roof solar energy. The high step ratio between AC output and DC input and inherent direct-pass protection make it suitable for the low-power independent inverter applications. A new interleaved current fed switched inverter(ICFSI)with drive interleaved topology PWM scheme was proposed to improve rated power,and various working modes of ICFSI were introduced,as well as the steady-state model and dynamic analysis of the proposed PWM scheme. Compared with CFSI,the maximum AC gain was increased by 33%. Finally,the small signal model of ICFSI was deduced and verified,and the loss of CFSI and ICFSI were compared and analyzed. The simulation results show that when the rated power is 600 W, interleaving operation can improve the efficiency by 4%. The 600 W prototype developed in the laboratory proved the effectiveness of the simulation results.
作者
张丽珍
王红燕
ZHANG Lizhen;WANG Hongyan(Department of Electric Power Engineering,Shanxi Electric Power Vocational and Technical College,Taiyuan 030021,Shanxi,China)
出处
《电气传动》
2021年第23期15-20,32,共7页
Electric Drive
关键词
电流型开关逆变器
交错
高增益
阻抗源逆变器
current fed switched inverter(CFSI)
interleaved
high gain
impedance source inverter(ZSI)
