PROJECT TITLE :

Design and Development of an Efficient Multilevel DC/AC Traction Inverter for Railway Transportation Electrification

ABSTRACT:

This paper presents a brand new trend within the transportation industry to adopt the multilevel inverter-primarily based propulsion systems and gives the design procedure of a replacement dc/ac 3-section six-level inverter for powering the rail metro cars. The proposed inverter is based on the multilevel converter as it possesses abundant lower component voltage stress compared with the pulsewidth-modulated (PWM) topologies. Space vector pulsewidth modulation (SVPWM) with back-to-back clamped diode voltage modulation operation is used to realize voltage regulation and high potency at any loading condition. Zero-current-switching operation is achieved while not using an auxiliary circuit, that ends up in minimum switching losses. The novelty of the proposed inverter lies inside the proposed control methodology, that uses a brand new switching pattern that guarantees a changed SVPWM to eliminate the unwanted harmonics from the output voltage. The new algorithm is developed using numerical iterative answer using the Newton–Raphson technique that was downloaded to the processor using Digital Signal Processing developed code. The mathematical model is straightforward however proven to be effective. Hence, a higher operating efficiency at full load of 98.five% is achieved as compared to previous potency of 97%. Analytical, simulation, and experimental results of a 150zero Vdc/70zero Vac 400-kW converter are presented to offer the proof of concept. The converter provides realty savings for the train underneath floor layout, higher operating potency with higher value price than the standard 2-level PWM laborious-switched converters.