A New 5-Level ANPC Switched Capacitor Inverter Topology for Photovoltaic Applications

In this paper, a new active neutral point clamped (ANPC) five-level (5L) inverter is proposed. The conventional ANPC output voltage is half of the input voltage. To rectify the above problem, a floating capacitor is used to boost the output voltage equal to the input voltage, which further reduces the size of the dc-link capacitors. In addition to this, the proposed topology does not need any sensors to balance the floating capacitor, which minimize the complexity of the inverter. Further, in the proposed topology, the neutral point is directly connected to the mid-point of dc-link capacitors, which reduces the leakage current and common mode voltage due to the presence of two clamping diodes. Moreover, a new carrier signal is introduced, and the advantages are discussed. The performance of proposed 5L inverter topology is analysed in terms of dynamic loading condition. To show the superiority of the proposed topology, it is simulated in MATLAB and results are discussed.