A New Topology of Single-Phase Nine-Level Inverter with Less Number of Power Elements for Grid Connection

Recently, the evolution of single phase multilevel inverters has been escalation due to its preference over traditional one. In this paper proposed a new topology of single phase Nine level inverter with less number of power elements for grid connection. In this proposed inverter have ten switches and their switches operate with fundamental frequency. The proposed inverter produced nine level output voltage from three input voltage sources. The proposed inverter reduced the switching losses (because of all switches operate with fundamental frequency), complexity, control circuit and place requirement. The proposed inverter compared to a single-phase seven level pulse width modulation (PWM) inverter for grid connection. The proposed inverter compared to conventional inverter has PWM technique have two triangular carrier signals identical to each other with an offset equivalent to the amplitude of the reference signal were used to generate PWM signals for the switches. The proposed inverter compared to conventional inverter has some switches operate at fundamental frequency and other operates at switching frequency.