This paper proposes a switched-capacitor based single-phase five-level inverter configuration that operates under boost operation and generates a voltage that is more than the DC source voltage. The proposed five-level inverter uses a capacitor and boots the output voltage. In this proposed inverter, capacitor gets charged in parallel while it discharges in series connections so that output voltage may attain higher magnitude than the DC source voltage. Sinusoidal Pulse Width Modulation-based techniques are considered to produce the required gate pulses for operating the switching devices of the inverter. The five-level switched-capacitor inverter is combined with the PV system via DC–DC boost converters to extract the maximum power using MPPT algorithm. To verify its capability, the PV-based system is further integrated to the utility grid. The operation and performance of the suggested switched-capacitor inverter coupled with the grid-connected PV system are also analyzed by developing its model in MATLAB/Simulink environment.

本文提出了一种基于开关电容器的单相五电平逆变器配置，该配置在升压操作下运行并产生高于直流电源电压的电压。所提出的五电平逆变器使用电容器并启动输出电压。在这个建议的逆变器中，电容器在串联连接时并联充电，因此输出电压可以获得比直流电源电压更高的幅度。基于正弦脉冲宽度调制的技术被认为可以产生操作逆变器开关设备所需的门脉冲。五电平开关电容逆变器通过 DC-DC 升压转换器与光伏系统结合，使用 MPPT 算法提取最大功率。为了验证其能力，基于光伏的系统进一步集成到公用电网中。