Akbar, Bagas Raihan (2022) Harmonic Analysis Due To Reconfiguration From AC To DC System Distribution On Trailing Suction Hopper Dredger King Arthur III Based On Simulation. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
The distribution system on ships usually uses an AC system, while in this study, the reconfiguration of the AC distribution system into DC will be carried out, to increase the efficiency of fuel use in ship diesel generators. By reconfiguring the distribution system, the influence of impedance on the AC current can be eliminated. But reconfiguring the distribution system has an additional component, namely the converter, so that it can increase harmonic distortion and total harmonic distortion (THD) in the ship's electrical system. This harmonic improvement can affect the quality of the power flowed in the system because it changes the waveform to not perfectly sinusoidal, so that the ship's electrical equipment can experience overheating which can reduce the performance of the ship's electrical equipment. In this study, an analysis was carried out to determine the number of harmonics that occur when the ship uses a DC electricity distribution system. Harmonic disturbance analysis is simulated using computer electrical distribution system simulator software, considering the operational conditions of the ship. From the results of the DC distribution simulation, total harmonic distortion (THD) was obtained on the generator bus, 7.30% of generator buses 1 and 7.31% of generator buses 2 in seagoing conditions, 7.30% of generator buses 1 and 7.31% of generator buses 2 in maneuvering conditions, 7.30% in generator buses 1 dredging conditions, 7.30% generator buses 1, 7.30% generator buses 2, and 7.35% generator buses 3 in at port conditions. Based on the IEEE 519-2014 standard, the limit of total harmonic distortion is 8%, so that the simulation results of total harmonic distortion are less than the specified limit, but the results of individual harmonic distortion (IHD) still exceed the limit of IEEE 519-2014, which is still above 5%, so it is still necessary to find a solution to reduce harmonic distortion that occurs. The solution to reduce harmonic distortion in this study is to install harmonic filters, which are single-tuned passive filters on buses that exceed the standard. After installing the harmonic filter, the harmonic distortion that occurs on the generator bus has decreased to, 0% of generator buses 1 and 2 in seagoing conditions, 0% of generator buses 1 and 2 in maneuvering conditions, 0% generators 1 in dredging conditions and 0% of generators 1,2, and 3 in at port conditions, and for IHD it is also below 0% so that harmonic distortion in the DC distribution system does not exceed the standard limit of IEEE 519-2014.
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Sistem distribusi pada kapal biasanya menggunakan sistem AC, sedangkan pada penelitian ini akan dilakukan rekonfigurasi sistem distribusi AC menjadi DC ini merupakan cara untuk meningkatkan effisiensi penggunaan bahan bakar pada diesel generator kapal. Dengan melakukan rekonfigurasi sistem distribusi maka dihasilkan pengaruh impedansi pada arus AC dapat dihilangkan. Tetapi merekonfigurasi sistem distribusi terdapat komponen tambahan yaitu converter, sehingga dapat meningkatkan distorsi harmonisa dan total harmonic distortion (THD) pada sistem kelistrikan kapal. Peningkatan harmonisa ini dapat mempengaruhi kualitas daya yang dialirkan pada sistem karena merubah bentuk gelombang menjadi tidak sinusoidal sempurna, sehingga peralatan listrik kapal dapat mengalami overheating yang dapat menurunkan performa dari peralatan listrik kapal. Pada penelitian ini dilakukan analisis untuk mengetahui besaran harmonisa yang terjadi ketika kapal menggunakan sistem distribusi listrik DC. Analisis gangguan harmonisa disimulasikan menggunakan software computer, dengan memperhatikan kondisi operasional kapal. Dari hasil simulasi distribusi DC, didapatkan total harmonic distortion (THD) yang terjadi pada bus generator, 7,30% bus generator 1 dan 7,31% bus generator 2 pada kondisi seagoing, 7,30% bus generator 1 dan 7,31% bus generator 2 pada kondisi maneuvering, 7,30% pada bus generator 1 kondisi dredging, 7,30% bus generator 1, 7.30% bus generator 2, dan 7.35% bus generator 3 pada kondisi at port. Berdasarkan dari standar IEEE 519-2014 batas dari total harmonic distortion sebesar 8%, sehingga hasil simulasi total harmonic distortion kurang dari dari batas yang ditentukan, tetapi hasil dari individual harmonic distortion (IHD) masih melebihi batas dari IEEE 519-2014 yaitu masih diatas 5% sehingga masih perlu dicari solusi untuk mengurangi distorsi harmonisa yang terjadi. Solusi untuk mengurangi distorsi harmonisa dalam penelitian ini adalah dengan cara pemasangan filter harmonisa, yaitu filter pasif single-tuned pada bus-bus yang melebihi standar. Setelah dilakukan pemasangan filter harmonisa distorsi harmonisa yang terjadi pada bus generator mengalami penurunan menjadi, 0% bus generator 1 dan 2 pada kondisi seagoing, 0% bus generator 1 dan 2 pada kondisi maneuvering, 0% generator 1 pada kondisi dredging dan 0% generator 1,2, dan 3 pada kondisi at port, dan untuk IHD juga sudah dibawah 0% sehingga distorsi harmonisa pada sistem distribusi DC sudah tidak melebihi batas standar IEEE 519-2014.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSKe 623.850 3 Akb h-1 2024, 3100022094126 |
| Uncontrolled Keywords: | Rekonfigurasi, THD, Harmonisa, Simulasi, Reconfiguration, THD, Harmonic, Simulation. |
| Subjects: | V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM471 Ships--Electric equipment |
| Divisions: | Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Marsudiyana - |
| Date Deposited: | 03 Mar 2026 05:49 |
| Last Modified: | 03 Mar 2026 05:49 |
| URI: | http://repository.its.ac.id/id/eprint/132685 |
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