Study of methods for detecting inrush current in power transformers

ISBN-13: 9786204740232 / Angielski / Miękka / 92 str.

Elham Salamat Nia; Azin kalantar Hormozi; Fatemeh Konari Zadeh Dezful

Opis

Power transformer As one of the most expensive and vital elements of the power system, it requires accurate, fast and reliable protection in all transformer operating conditions. The differential protection design is used as the main protection in all transformers. One of the problems in the proper functioning of this protection is the issue of intrusion current. The inrush current often flows when the transformer is initially energized or the transformer returns to the mains after the short-circuit fault in the primary head has been rectified. The amplitude of this current is up to ten times the rated current of the transformer and can be mistaken for fault current by differential relays. Issuing a trip command in this situation will prevent the transformer from starting. Since the attack current gradually dampens over ten cycles and decreases to its nominal value, it does not damage the transformer, so it is necessary to use a design in the differential protection system to prevent this current from other transient currents. Detected and prevent relays from operating. Because inrush currents are perharmonic currents, and especially the second harmonic amplitude is significant in

O autorze

Salamat Nia, ElhamElham Salamatnia is born in Abadan , Iran . she has gradulated of Electrical power engineering in Msc. with more than 17 years of Work experience and teaching. She is the author of 6 books in the field of electricity and technology that have been translated into 7 languages and made available to the public.So far more than 30 articles has published