Control of Modular Multilevel Converter Fed 3-Phase Induction Motor using DTC with PI Controller
Sriramulu Naik Mudhavath1, Gudapati Sambasiva Rao2

1Sriramulu Naik Mudhavath*, Research Scholar, Dept of EEE, Acharya Nagarjuna University, Guntur, A.P.
2Dr. Gudapati Sambasiva Rao, Associate Professor, Dept of EEE,RVR&JC College of Engineering, Guntur, A.P
Manuscript received on December 12, 2019. | Revised Manuscript received on December 22, 2019. | Manuscript published on January 10, 2020. | PP: 3451-3456 | Volume-9 Issue-3, January 2020. | Retrieval Number: C8591019320/2020©BEIESP | DOI: 10.35940/ijitee.C8591.019320
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Abstract: In this paper 3-level Modular Multilevel Converter fed direct torque control (DTC) of Induction Motor (IM) is proposed. The proposed Modular Multilevel Converter (MMC) replaces a three-level Neutral Point Clamping (NPC) converter to drive an Induction Motor, because of its high voltage power range. The main drawback of the DTC of NPC fed IM using conventional PI controller is high torque, stator flux ripples and speed of IM is decreasing under transient and steady state operating conditions. The work of this paper is to study, evaluate and compare the techniques of the conventional DTC with NPC and DTC with MMC using PI controller, applied to the induction motor through MATLAB/Simulation. 
Keywords: NPC-Neutral Point Clamping, MMC-Modular Multilevel Converter, IM-Induction Motor, DTC-Direct Torque Controlling, Conventional PI Controller THD-Total Harmonic Distortion.
Scope of the Article: Control and Automation