Septiawan, Hadwim (2019) Analisis Pre Energize Pada Transformator 3 Fasa dengan Mempertimbangkan Fluks Tiap Fasa. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Arus inrush merupakan fenomena transien yang terjadi ketika transformator pertama kali dihubungkan dengan sumber tegangan pada saat kondisi tanpa beban, sehingga menimbulkan lonjakan arus yang bernilai tinggi. Arus inrush berdampak buruk bagi sistem tenaga listrik dan dapat menyebabkan kesalahan operasi rele pengaman. Tujuan dari studi ini adalah untuk mengetahui besarnya arus inrush dan meminimalisir besarnya arus inrush dengan menggunakan metode prefluxing. Pada studi ini dilakukan perngujian dengan menggunakan transformator uji 3 fasa 3 kVA tipe inti. Pengujian ini dilakukan dengan cara memberikan fluks DC mula sebelum transformator dihubungkan dengan sumber tegangan, kemudian ketiga fasa transformator di-energize secara bersamaan pada sudut tegangan tertentu sehingga arus inrush dapat diminimalisir. Hasil pengujian menunjukkan trafo yang diberi fluks DC mula selalu menghasilkan arus inrush yang lebih kecil Pada pengujian ini arus inrush bernilai minimum pada sudut penyalaan 90 derajat dengan nilai arus inrush sebesar 0.74 A pada fasa R, 3.41 A pada fasa S, dan 3.80 A pada fasa T.
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Inrush current is a transient phenomena that occur when energizing transformers for the first time at no load condition, so a high transient current will be drawn by the transformer. Inrush current have a negative impact on the power system and cause operation error on the protection relay. The purpose of this study is to determine the magnitude of the inrush current and minimize the inrush current using the prefluxing method. In this study a test was carried out using a 3-phase 3 kVA core type transformer. This test is done by giving an initial DC flux before the transformer is connected to the voltage source, then at certain voltage angle the three transformer phases are connected to the voltage source simultaneously so the inrush current can be reduced. The test results show that the fluxed transformer always draw a smaller inrush current. In this test the minimum inrush current is at 90 degree voltage angle with an inrush current value of 0.74 A in phase R, 3.41 A in phase S, and 3.80 A in phase T.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSE 621.314 Sep a-1 2019 |
| Uncontrolled Keywords: | Arus inrush, Transformator, Fluks, Transien, Inrush current, Transformers, transient |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2551 Electric transformers. T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3226 Transients (Electricity). Electric power systems. Harmonics (Electric waves). T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK6565.T7 Transformers |
| Divisions: | Faculty of Electrical Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis |
| Depositing User: | Hadwim Septiawan |
| Date Deposited: | 22 Feb 2023 02:34 |
| Last Modified: | 22 Feb 2023 02:34 |
| URI: | http://repository.its.ac.id/id/eprint/63556 |
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