Integrated fuzzy and phase shift controller for output step voltage control in multilevel inverter with reduced switch count. (2nd April 2020)

• Record Type: Journal Article
• Authors: Rahila, Jawahar; Santhi, M.
• Is Part Of: Automatika. Volume 61:Number 2(2020)
• Page Start: 238
• Page End: 249
• Publication Date: 2020-04-02
• Subjects: Fuzzy logic -- phase shift control -- multilevel inverter -- MPPT -- n level; Automatic control -- Periodicals; 629.805
• DOI: 10.1080/00051144.2019.1680010
• Languages: English
• ISSNs: 0005-1144

Abstract

ABSTRACT: 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.