Setia, Tangguh Ramadhan (2019) Short Circuit Study On Ship Dynamic Positioning Electrical System Based On Laboratory Scale Experiment. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Seiring dengan tuntutan era yang terus berkembang, aktivitas manusia tidak hanya terfokus di daratan. Sekarang kegiatan lepas pantai sudah mulai ramai oleh orang- orang, baik itu kegiatan industri, eksplorasi, eksploitasi, transportasi, dan kegiatan lain yang memungkinkan manusia untuk mencari penghidupan di dunia ini. Dynamic Positioning adalah sistem kontrol yang dapat mempertahankan posisi kapal ke objek pada sumbu horizontal. Dengan derajat kebebasn pada kapal, sistem Dynamic Positioning menjaga posisi kapal dari pergerakan yang bergoyang dan bergelombang. Istilah short circuit merupakan suatu gangguan dimana konduktor pengkantar saling terhubung tanpa memlalui beban atau dengan nilai impedansi atau resistansi yang relatif rendah. Ada dua nilai kegagalan arus hubung singkat yang harus dievaluasi. Yang pertama adalah arus hubung singkat maksimum. Nilai maksimum arus hubung singkat akan terkait dengan arus hubung singkat di terminal di sekitar perangkat perlindungan. Kedua, arus hubung singkat minimal. Nilai arus ini penting untuk digunakan saat memilih kurva waktu-saat ini untuk pemutus sirkuit dan sekering. Ada beberapa metode untuk menghitung nilai arus hubung singkat termasuk impedansi, komposisi, dan metode konvensional. Pada laporan ini, penulis menggunakan metode impedansi yang berdasarkan standar IEC 60909. Berdasarkan percobaan yang diadakan di laboratorium, setiap variasi dan skenario beban memiliki nilai tren masing-masing. Arus hubung singkat simetris awal tertinggi yang diperoleh pada metode impedansi dan metode konvensional ditemukan pada skenario ke-2 dan variasi beban 60% -60%, nilai yang diperoleh dalam metode impedansi adalah 2,5158 Amphere dan nilai yang diperoleh dengan metode konvensional adalah 3,91 Amphere.
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Along with the demands of an ever-evolving era, human activities are not only focused on land. Now the offshore activites have started to be crowded by people, be it industrial activities, exploration, exploitation, transportation, and other activities that enable humans to make a living in this world. Dynamic Positioning is a controll system that can maintain ship position to the object on horizontal axis. With the degree of freedom of the ship, the Dynamic Positioning system maintains the position of the ship from sway and surge movements. The term short circuit fault is used to explain that the conductor is briefly connected. There are two values of short circuit current failure that must be evaluated. The first is the maximum short circuit current. The maximum value of the short circuit current will be related to the short circuit current in the terminal around the protection device. Second, the short circuit current is minimal. The value of this current is important to use when selecting the current-time curve for circuit breakers and fuses. There are several method to calculate the value of short circuit current including impedance, composition, and conventional method. On this papper, author use impedance method that based on IEC 60909 standart. Based on experiment that held on laboratorium, each load variation and scenario have their own trend value. The highest initial symetrical short circuit current that obtain both on impedance method and conventional method were found at 2nd scenario and 60%-60% load variation, the value that obtain in impedance method is 2.5158 Amphere and the value that obtain on with conventional method is 3.91 Amphere.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Bow thruster, AHTS vessel, Short circuit, Impedance method. |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1010 Electric power system stability. Electric filters, Passive. V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering |
| Divisions: | Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis |
| Depositing User: | Ramadhan Tangguh Setia |
| Date Deposited: | 04 Jul 2024 05:58 |
| Last Modified: | 04 Jul 2024 05:58 |
| URI: | http://repository.its.ac.id/id/eprint/69350 |
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