DESIGN OF DIFFERENTIAL PROTECTION SYSTEM AND ITS SETTINGS FOR 20MVA INDUSTRIAL TRANSFORMER

The design of a differential protection system and its settings for a 20MVA industrial transformer are discussed in this study. Transformers are crucial in power systems for scaling up or stepping down power. Any transformer fault that results in significant equipment damage raises the cost of replacement. In order to safeguard the transformer from fault, it must have an adequate protective system. Differential protection is the most often employed protection strategy for internal problems in transformers [17]. Using CT secondary impedance, this differential protection is divided into two categories. Both the low and high impedance differential protection schemes fall under this category. The differential protection is impacted by the harmonics generated in the transformer [9]. This paper explains low impedance transformer differential protection design while taking the intelligent electronic device (IED)-7UT613 into consideration.