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Dr. Omar El-Sayed Mohammed Youssef :: Publications:

Title:
Starting of induction motor fed with stand-alone DFIG
Authors: M. Sharawy; Adel A. Shaltout; Naser Abdel-Rahim; Mahmoud A. Al-Ahmar; O. E. M. Youssef
Year: 2021
Keywords: 3-phase induction motor; Constant V/f control; Indirect FOC; Stand-alone DFIG; WECS
Journal: Bulletin of Electrical Engineering and Informatics
Volume: 10
Issue: 5
Pages: 2414-2423
Publisher: Not Available
Local/International: International
Paper Link:
Full paper Not Available
Supplementary materials Not Available
Abstract:

This paper presents dynamic simulation and control of stand-alone doubly fed induction generator (DFIG) loaded with 3-phase induction motors (IMs). The study reveals that direct on-line starting of large IMs causes a large voltage sag across the generator terminals as the starting current drawn reaches up to 8-9 times the rated load current. Traditionally, this problem has tackled by oversizing of the generator or employment of special starters, under the pretext of mitigating voltage sag. This work explores ways that the starting current can be reduced economically by applying constant V/f control side by side with indirect field-oriented control (FOC) applied on the rotor side converter of the DFIG. This methodology enables starting of larger IMs and mitigation of voltage sag that occurs during the start-up period. Two different rating of IMs loaded with speed-squared mechanical torque are mainly considered. Simulation results of the system behavior under study confirm the capability of the proposed control.

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