Silaen, Daniel Pardomuan (2018) Analisis Tegangan Jatuh pada Sistem Distribusi Listrik Kapal AHTS BNI Castor Akibat Penggunaan Motor Elektrik pada Mode Dynamic Positioning Menggunakan Metode Simulasi. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kapal dengan dynamic positioning memiliki kemampuan khusus antara lain, menjaga posisi kapal pada lokasi yang ditetapkan, mengikuti refrence point untuk bergerak sesuai dengan jalur yang ditentukan dan pekerja lainnya. Beberapa pekerjaan kapal dengan dynamic positioning memiliki risiko tinggi jika terjadi kegagalan dalam hal ini kehilangan posisinya. Oleh karena itu, terdapat tiga kelas dynamic positioning yaitu DP1,DP2, dan DP3 kelas tersebut ditentukan dari tingginya risiko kegagalan pada suatu pekerjaan laut. Hampir seluruh peralatan penunjang dynamic positioning merupakan instalasi kelistrikan, menurut data statistic tahun 1994-2003 kegagalan kehilangan posisi yang fatal akibat suplai daya sebesar 10,6% dan sistem elektrikal 6,1% (Li, 2013). Oleh karena itu kualitas tegangan listrik menjadi Salah satu faktor penting pada sebuah sistem kelistrikan kapal. Buruknya kualitas tegangan yang dihasilkan dapat mengakibatkan penurunan keandalan sistem tenaga listrik dan dapat mengurangi lifetime dari peralatan listirk tersebut. Tegangan jatuh yang terjadi pada beban listrik di kapal sering dihiraukan oleh ABK dan jarang mendapat perhatian khusus. Pada penelitian ini dilakukan simulasi tegangan jatuh menggunakan software simulasi untuk mengetahui tegangan jatuh. Simulasi dilakukan pada beberapa konfigurasi suplai daya dan variasi beban. Hasil simulasi dengan load flow analysis didapatkan tegangan jatuh pada setiap skenario konfigurasi dan variasi beban. terdapat 5 skenario konfigurasi yang mengalami tegangan jatuh melewati standar IEC (+/-5%). Upaya perbaikan dilakukan pada salah satu skenario 5 konfigurasi suplai daya yaitu closed bus (dua generator thruster+satu diesel generator). Metode perbaikan dengan pergantian kabel dilakukan pada kabel 3,5,9,33 dan 35 yang memiliki status overload, kabel diubah dari ukuran 120 mm menjadi 400 mm. Upaya ini meminimalkan tegangan jatuh yang terjadi pada bow thruster 1 5,65 % turun menjadi 2,14 %, bow thruster 2 dari 5,28% turun menjadi 1,99%, dan steering gear starter 1 dari 5,58% turun menjadi 3,55%. Kemudian perbaikan dengan metode penambahan kapasitor diterapkan pada bus beban bow thruster 1 dan 2, masing-masing sebesar 703 KVAR. Upaya ini meminimalkan tegangan jatuh yang terjadi pada bow thruster 1 5,65 % turun menjadi 3,42 %, bow thruster 2 dari 5,28% turun menjadi 3,2%, dan steering gear starter 1 dari 5,58% turun menjadi 4,41% ========================================================================================================
Ships with dynamic positioning have special abilities such as, maintain the position of the ship at a designated location, following the refrence point to move in accordance with the path which have been planned and so on. The task of Ship with dynamic positioning usually has a high risk if there is a failure, in this case losing its position. Therefore, there are three classes of dynamic positioning that are DP1, DP2, and DP3 class are determined from the high risk of failure in a marine job. Almost all of the supporting equipment for dynamic positioning is electrical installation, according to statistical data of 1994-2003 failure of fatal position loss due to power supply of 10.6% and 6.1% electrical system (Li, 2013). Therefore, the quality of the electric voltage becomes one of the important factors in a ship electrical system. The poor quality of the resulting voltage can lead to a decrease in the reliability of the electrical power system and can reduce the lifetime of the electrical equipment. The falling voltage occurring on the electrical load on the ship is often ignored by ship crew and rarely gets special attention. In this study simulation of voltage drop using simulation software to know the voltage drop. Simulations are performed on several power supply configurations and load variations. The simulation result with load flow analysis obtained voltage drop in each scenario configuration and load variation. there are 5 configuration scenarios that experience voltage drop across IEC standard (+/- 5%). The improvement is done in one scenario. that is on scenario 5th. the 5th scenario have power supply configuration that is closed bus (two generator thruster + one diesel generator). Repair method with cable replacement is done on cable 3,5,9,33 and 35 which has overload status, with software simulation those cables being replaced from size 120 mm to 400 mm. This effort minimizes the drop voltgae that occurs on the bow thruster 1 from 5,5% decreases to 2.14%, the 2nd bow thruster from 5.28% decreases to 1.99%, and the steering gear starter 1 from 5.58% decreases to 3 , 55%. Then the improvement by the method of adding capacitors is applied to the bus load of bow thruster 1 and 2, each of 703 KVAR. This effort minimizes the drop voltage that occurs on the bow thruster 1 from 5,5% decrease to 3.42%, the 2nd bow thruster from 5.28% decreases to 3.2%, and the steering gear starter 1 from 5.58% decreases to 4 , 41%
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSSP 623.850 3 Par a-1 3100018077793 |
| Uncontrolled Keywords: | Dynamic positioning; Drop Voltage; IEC; Load Flow Analysis; ship electrical system. |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2785 Electric motors, Induction. V Naval Science > VC Naval Maintenance > VC 270-279 Equipment of vessels, supplier,allowances,etc V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM731 Marine Engines V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM773 Ship propulsion, Electric |
| Divisions: | Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis |
| Depositing User: | Daniel Pardomuan |
| Date Deposited: | 19 Feb 2019 08:50 |
| Last Modified: | 30 Dec 2020 05:42 |
| URI: | http://repository.its.ac.id/id/eprint/57709 |
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