EV Charging System with V2G Operation using 5-Level Multi-level Inverter
Keywords:
Multi-level Inverter, 5-level, Boost Factor, Switched CapacitorAbstract
MLIs have a significant advantage over two-level inverters, including lower dv/dt, less electromagnetic interference, improved harmonic performance and reduced output filter size. NPC inverter, FC inverter and CHB inverters are three of the earliest well-established inverter topologies that have been around for a long time. These conventional topologies each have their own set of advantages and disadvantages. In the case of NPC and FC suffer the capacitor voltage balancing issues and require a complex control strategy to balance the capacitor voltage. Six unidirectional switches, one diode, and one capacitor with a PV source are used. In this topology, a leg of the switched capacitor is cascaded with the H-bridge structure. The capacitor (C) is charged to the DC input voltage of V_DC. The proposed inverter generates different output levels of 0, ±V_DC, and ±2V_DC. It archive five-voltage level at the output terminal and generates boost output voltage with levels of +200V, +100V, 0, -100V and -200V.
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