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Received: 6 January 2020 Accepted: 20 March 2020 Among the renewable energy sources, solar energy has been a big part interest sources in past few years. With the development of power electronics technology, the multi-level inverters are widely used for the production of electrical energy. There are several variants of these converters, the cascaded-H bridge multi-level inverter (CHB) is more advantageous compared to the other arrangements, since each H bridge inverter has an independent DC source. In this paper, a three-phase five-level CHB inverter feeding by a PV solar-Boost converter system using a discontinuous pulse width modulation (DPWM) presented, improved the power quality by reducing the total harmonic distortion (THD) at the outputs voltage and current and also reducing inverter switching losses. The main idea of this work, is that the DPWM technique is used, studied and analyzed in detail to control the multilevel inverters topologies, and it can have many advantages to the other PWM techniques like space vector modulation (SVPWM). The simulation was performed in the MATLAB/Simulink software using an induction machine like a load and the obtained results are presented and analyzed.

Discontinuous PWM Applied for a Three-Phase Five-Level CHB Inverter Fed by PV Solar-Boost Converter