Integrated fuzzy and phase shift controller for output step voltage control in multilevel inverter with reduced switch count

• Main Authors: Jawahar Rahila, M. Santhi
• Format: Article
• Language: English
• Published: Taylor & Francis Group 2020-04-01
• Series: Automatika
• Subjects: fuzzy logic; phase shift control; multilevel inverter; mppt; n level
• Online Access: http://dx.doi.org/10.1080/00051144.2019.1680010

A modified multilevel inverter with a configurable level generation is proposed in this paper. The MLI is composed of a modified boost converter at the front end followed by a level generation circuit and a H-bridge configuration. The front-end converter is biased with a PV source with a Hybrid boost resonant converter. The switches are triggered out of phase through a MPP tracker which uses Fractional INC MPPT. The secondary side of the circuit is composed of a derived voltage doubler along with the voltage regulator. The output of the doubler is regulated through a level converter which integrates a fuzzy controller and a phase shift controller. The modified multilevel inverter uses a low-voltage PV source as input and generates a variable-step multilevel output voltage with lower harmonic distortion and it is suitable for low-power PV applications.