Abstract: The conventional I- and T-type three level neutral-point-clamped (3L-NPC) inverter for low-voltage renewable energy systems is generally used in this paper. Three-level low-voltage 1-phase inverters used over the last years. For high switching frequencies, converter efficiency suffers and can be kept high only by employing cost intensive switch technology such as MOSFET switches therefore, conventional IGBT technology still prevails. In this paper, the alternative of using five-level converters for low voltage applications is addressed. The performance and the competitiveness of the five-level T-type NPC Inverter is analyzed in detail. The 5L NPC inverter basically combines the positive aspects of the five-level inverter such as low conduction losses, small part count and a simple operation principle with the advantages of the five-level converter such as low switching losses and superior output voltage quality. It is, therefore considered to be a real alternative to three-level inverters for certain low voltage applications. Here Cool MOSFET replaced for IGBT+Diode middle bidirectional switch. Therefore, it can reduce the current path in the zero vector conduction due to replacing Cool MOSFET. It has low on state resistance so voltage drop soundly reduced. Increasing the voltage level MOSFET up to five levels for getting lower Harmonics distortion.
Keywords: NPC–Neutral point clamp, IGBT-Insulated gate bipolar transistor, and MOSFET-metal oxide semiconductor field effect transistor.
Title: Design of Five Level T-Type Neutral-Point Clamped Inverter Using Cool-MOSFET for Solar Energy System
Author: G. Karthick, E. Prasanna Kumar
International Journal of Electrical and Electronics Research
ISSN 2348-6988 (online)
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