Integrated three-phase PV SiC inverter to increase self-consumption with innovative topology, flexible connection options and high efficiency

Abstract

The self-consumption of PV-systems can be increased with a battery. The proposed three-phase inverter provides three independent DC inputs that can each be connected to a battery or a PV-string. The innovative topology allows energy flow in each direction at a very high efficiency (> 98 % in each converter stage). The application of SiC transistors leads to a higher switching frequency (48 kHz) compared to commercial systems. The resulting filter elements such as inductors and capacitors are PCB mountable. Thus a highly integrated demonstrator was developed. The system is proposed in detail in this paper

Topological and Reliable based selection of Inverter module for PV application under standard parameters of Cost and life-Span

“…For better lifespan SSSD with wide band gap (WBG) are better suited in increasing overall lifespan of PV system [44]. The only drawback of this strategy is the increase in average costing of inverter unit which itself consumes 50 % of the cost of entire PV system [45]. The other way of increasing lifespan of reactive unit in PV inverter is by reducing the benchmark of ripple current and make sure that charging-discharging of capacitive unit remains natural even in highfrequency working situation which can be achieved either by shifting toward discontinuous Pulse width modulation (PWM) [46] or by switching toward selective harmonic PWM [47].…”