A New Switched Capacitor Inverter Topology With BoostFacility

Abstract

A new switched capacitor inverter topology suitable for photovoltaic applications is proposed in this paper. The inverter is capable of boosting up low voltage DC in to high voltage DC and then invert it to the required voltage level with high quality in single stage. The proposed inverter has a special extended structure, which minimizes the number of components and devices when compared to the conventional multilevel inverter topology. Further some of the switches in the topology operate in the low frequency and this result in reduction in switching losses there by increasing the efficiency. The inverter is switched by the means of level shifting carrier based Pulse Width Modulation (PWM) methodology which maintains the capacitor voltages at a balanced level. The proposed topology operation is verified through simulation in MATLAB/SIMULINK and the results are presented. A detailed comparison of the proposed inverter with other inverter proposed in the literature is also presented