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This paper presents a modelling and experimental verification system for a group of induction motors during starting in medium voltage networks including its effects on other nearby running units in different operating conditions. The simulation model is based on a real-life case study which is an agricultural drain pump station. The dynamic model was built with MATLAB®/SIMULINK® where a thorough performance analysis can be achieved. For system verification, the simulation curve results were compared with real-life data curves which were recorded by a suitable device located on worksite. The verified model was used to perform six practical scenarios based on the real station’s operating instructions. For each studied Received: 27 December, 2018 Accepted: 14 May, 2019 M. El-Hayes. Author graduated from faculty of engineering, Kafr ElSheikh University. He is doing a Master degree at faculty of engineering, Mansoura University, Mansoura, Egypt. (e-mail: mahmoud.elhayes@eng.kfs.edu.eg). E. Gouda. Author is with the Electrical Engineering Department, Mansoura University, Mansoura, Egypt, (e-mail: eid.gouda@yahoo.fr). G. A. El-Salam. Author is with the Electrical Engineering Department, Mansoura University, Mansoura, Egypt, (e-mail: gabr47@hotmail.com). S. Abdelkader. Author is with the Electrical Engineering Department, Mansoura University, Mansoura, Egypt, (e-mail: sobhy_abdelkader@yahoo.com). scenario, a group of parameters such as voltage dip, its duration and voltage regulation are discussed in detail and compared in a tabular form considering the recommended adjustments for the protection relay settings.

Practical Transient State Assessment for Induction Motors Starting in Medium Voltage Networks