CAJ | 학술논문

与准 Z 源逆变器相比，开关电感准 Z 源逆变器具有更高的升压性能，但在新能源发电领域，光伏或燃料电池的输出电压变化范围大，现有的开关电感准 Z 源逆变器依然存在实际升压能力不高的缺点，在开关电感准 Z 源逆变器基础上，将开关电感单元中的一个二极管用电容来代替，形成新的升压单元，提出了一种基于新的升压单元的高增益准 Z 源逆变器。与开关电感准 Z 源逆变器相比，高增益准 Z 源逆变器减小了一个二极管的导通压降，可获得更高的增益，并保持了输入电流的连续、输入电压源与逆变桥侧共地的优点。在相同的输入输出条件下，高增益准 Z 源逆变器减小了桥臂直通时间，降低了系统直通时产生的导通损耗，提高了效率。在实验室中制作了开关电感准 Z 源逆变器和高增益准 Z 源逆变器两台原理样机，实验结果验证了理论的正确性。
여준 Z 원역변기상비，개관전감준 Z 원역변기구유경고적승압성능，단재신능원발전영역，광복혹연료전지적수출전압변화범위대，현유적개관전감준 Z 원역변기의연존재실제승압능력불고적결점，재개관전감준 Z 원역변기기출상，장개관전감단원중적일개이겁관용전용래대체，형성신적승압단원，제출료일충기우신적승압단원적고증익준 Z 원역변기。여개관전감준 Z 원역변기상비，고증익준 Z 원역변기감소료일개이겁관적도통압강，가획득경고적증익，병보지료수입전류적련속、수입전압원여역변교측공지적우점。재상동적수입수출조건하，고증익준 Z 원역변기감소료교비직통시간，강저료계통직통시산생적도통손모，제고료효솔。재실험실중제작료개관전감준 Z 원역변기화고증익준 Z 원역변기량태원리양궤，실험결과험증료이론적정학성。
Compared to the quasi-Z-source inverter,the switched-inductor quasi-Z-source inverter (SL-qZSI) provides a higher DC-link voltage.But in some new energy power generation systems,the input voltage is environmentally affected and sometimes is too low,the boost ability of SL-qZSI may be still insufficient.By just replacing one of the diodes in the switched-inductor unit with a capacitor,a voltage-lifting unit is formed.This paper deals with a high set-up quasi-Z-source inverter based on the voltage-lifting unit(VL-qZSI).The proposed VL-qZSI has an improved boost factor while retaining the advantages of SL-qZSI,the continuous input current and a common ground with the dc source.This paper presents the operating principle and an analysis on VL-qZSI and has it compared with the quasi-Z-source inverter and SL-qZSI.A prototype of SL-qZSI and VL-qZSI is established in the lab,the experiment results verifying the correctness of the analysis.