Akbar, Muhammad Yusuf (2021) Analisis Arus Transien Pada Belitan Transformator Daya 21/500 kV Akibat Load Shedding Di PLTU Paiton Unit 5. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Load shedding merupakan metode pelepasan beban dengan mematikan sistem pembangkit dalam waktu sementara akibat gangguan internal maupun eksternal melalui proses switching / trip. Pembuka atau penutupan switching pada CB (Circuit Breaker) menyebabkan perubahan konfigurasi rangkaian terhadap arus dan tegangan. Jika transformator mengalami proses switching atau gangguan hubung singkat maka arus yang cukup tinggi akan mengalir menuju belitan transformator yang dapat mempengaruhi kualitas transformator. Tugas akhir ini akan mengidentifikasi dan menghitung arus transien pada belitan transformator daya 21/500 kV di PLTU Paiton Unit 5 dengan memodelkan load shedding melalui simulasi di ATPDraw dan membandingkan data SFRA (Sweep Frequency Response Analysis) untuk mengetahui kualitas dari belitan transformator. Berdasarkan pada simulasi, untuk transformator daya 21/500 kV memiliki arus nominal sebesar 21 kA pada sisi primer dan 883,3 A pada sisi sekunder. Ketika load shedding akibat gangguan 1 fasa ke tanah, terjadi arus transien besar mencapai 19,937 kA di sisi primer dan 3,171 kA di sisi sekunder. Ketika load shedding akibat gangguan 3 fasa ke tanah, terjadi arus transien besar mencapai 37,401 kA di sisi primer dan 5,160 kA di sisi sekunder. Dari hasil arus transien yang didapatkan, arus transien masih dalam batas aman terhadap garis ketahanan trafo. Belitan transformator tidak mengalami deformasi dan pergeseran berdasarkan data SFRA.
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Load shedding is a method of load rejection by turning off the generation system due to internal and external disturbances through a switching/trip process. Opening or closing of a CB (Circuit Breaker) causes a configuration change to current and voltage. If the transformer experiences a switching process or a short circuit, a high enough current will flow into the transformer windings which can affect the quality of the transformer. This final project will identify and calculate the transient current in the winding of the 21/500 kV power transformer at PLTU Paiton Unit 5 by modeling the load shedding through simulation in ATPDraw and comparing SFRA (Sweep Frequency Response Analysis) data to determine the quality of the transformer winding. Based on the simulation, the 21/500 kV power transformer has a nominal current of 21 kA on the primary side and 883.3 A on the secondary side. When load shedding occurred due to a single phase to ground fault, a large transient current occurs reaching 19,937 kA on the primary side and 3,171 kA on the secondary side. When load shedding occurred due to a 3-phase to ground fault, a large transient current occurs reaching 37,401 kA on the primary side and 5,160 kA on the secondary side. From the results of the transient current obtained, the transient current is still within the safe limits of the transformer endurance line. Transformer windings is not deformed and shifted based on SFRA data.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Transient Current, Windings of Power Transformer 21/500 kV, Load Shedding, Arus Transien, Belitan Transformator Daya 21/500 kV, Load Shedding. |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2551 Electric transformers. |
| Divisions: | Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20201-(S1) Undergraduate Thesis |
| Depositing User: | Muhammad Yusuf Akbar |
| Date Deposited: | 13 Aug 2021 09:36 |
| Last Modified: | 11 Oct 2024 05:35 |
| URI: | http://repository.its.ac.id/id/eprint/86316 |
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