SVPWM based Transformer less Wind Energy Conversion System for 3 phase 3 level Neutral Point Clamped Inverter
Palanisamy R1, Shaurya Misra2, Deepak Kulhar3
1Palanisamy.R, SRM University, Kattankulathur, India
2Shaurya Misra, SRM University, Kattankulathur, India
3Deepak Kulhar, SRM University, Kattankulathur, India
Manuscript received on January 07, 2015. | Revised Manuscript received on January 22, 2015. | Manuscript published on February 28, 2015. PP: 73-79  | Volume-4 Issue-3, February 2015. | Retrieval Number:  C3732024315/2013©BEIESP

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Abstract: The Multilevel inverters are highly being used in high-power medium voltage applications due to their better performance compared to two-level inverters. Among various types of multilevel inverters, neutral point clamped three-level inverter (NPCTLI) is suitable for a Transformerless grid-connected wind energy conversion system. As it avoids leakage currents, common mode voltage and capacitor balancing problems. Split inductor is used to interconnect inverter with grid connected system which avoids the usage of transformer. While using split inductor neutral point clamped multilevel inverter, shoot-through problems are producing in the bridge legs of an NPC-TLI. Space Vector pulse width modulation Control (SVPWMC) offers an excellent current control and improved voltage performance to NPCTLI, which reduced amount of total harmonic distortion present in system. The proposed topology guarantees for no shoot-through possibility and capacitor balancing problem. The new topology is referred to as split-inductor NPCTLI (SI-NPCTLI). Finally, the simulation results of a proposed SI-NPCTLI system verified using MATLAB SIMULINK.
Keywords: Wind energy conversion system, PMSG, Space Vector pulse width modulation (SVPWM), Neutral point clamped three-level inverter (NPCTLI).