Open AccessA grid interconnected nested neutral-point clamped inverter with voltage synchronization using synchronous reference frame controller
Author(s) -
Bogimi Sirisha
Publication year - 2021
Publication title -
international journal of applied power engineering
Language(s) - English
Resource type - Journals
eISSN - 2722-2624
pISSN - 2252-8792
DOI - 10.11591/ijape.v10.i4.pp364-372
Subject(s) - control theory (sociology) , inverter , pulse width modulation , maximum power point tracking , grid connection , synchronization (alternating current) , reference frame , voltage , photovoltaic system , computer science , controller (irrigation) , converters , electrical engineering , engineering , topology (electrical circuits) , frame (networking) , telecommunications , agronomy , control (management) , artificial intelligence , biology
Nested neutral-point clamped multi level inverter with inter connection to grid through the synchronous reference frame (SRF) controller for synchronization of voltage to the grid is demonstrated. The system's main feature is that voltage stress in each inverter switching device is kept to a minimum, and redundant inverter switching states are utilised for neutral point and flying capacitor voltage balancing with sinusoidal pulse-width modulation (PWM) technique, synchronisation to grid voltages, and power injection with low harmonic generation. The inverter receives its input from a photovoltaic (PV) source that is coupled to DC-DC booster converters that are regulated by the maximum power point (MPP) tracking incremental conductance algorithm to maintain a constant dc voltage. The system is examined under various load conditions with MATLAB/Simulink model.