Supriyadi, Sidik (2015) Peningkatan Stabilitas Proteksi Differensial Selama Ct Saturasi Dengan Transient Bias Di Saka Indonesia Pangkah Ltd. Undergraduate thesis, Institut Technology Sepuluh Nopember.
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Abstract
Dalam sistem tenaga listrik, sistem proteksi merupakan komponen
penting untuk menjaga kelangsungan dan keandalan penyaluran energi
listrik. Dimana sistem proteksi ini berfungsi untuk mengisolasi
gangguan agar tidak terjadi kerusakan pada peralatan dan menjaga
kontinuitas pelayanan pada bagian sistem tenaga listrik yang tidak
mengalami gangguan. Salah satu peralatan yang berperan dalam sistem
proteksi adalah rele diferensial yang digunakan untuk melindungi
generator dan transformator. Dalam kegiatan operasionalnya, Saka
Indonesia Pangkah Ltd mengalami gangguan selama CT (Current
Transformers) saturasi saat transformator daya 5 MVA dienergize dan
rele diferensial generator 4.3 MVA trip. Sehingga mengakibatkan
generator terputus dari sistem dan suplai daya listrik ke beban terhenti.
Pada tugas akhir ini akan dibahas adanya kegagalan proteksi diferensial
selama CT (Current Transformers) saturasi. Analisis yang dilakukan
meliputi performansi CT saat transformator daya 5 MVA dienergize.
Kemudian akan dilakukan pemodelan dan simulasi melalui software
MATLAB. Dari hasil analisis dan simulasi tersebut dapat dicari
alternatif solusi yang baik untuk mengatasi permasalahan yang ada
dengan metode transient bias. Metode ini digunakan untuk
meningkatkan batas ambang trip dari rele diferensial. Dimana
peningkatan ambang trip (operating current) diperoleh dari penambahan
arus bias dan arus transient bias.
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In electric power systems, the protection system is the most
important component to maintain the continuity and the reability of
electrical energy. It serves to isolate the disturbance to avoid damaging
equipments and maintain continuity of service on the part of electric
power systems which is not disturbed. One of the equipments that play
role in protection system is differential relay which is used to protect
generators and transformers. On its operations, Saka Indonesia Pangkah
Ltd is disturbing when the CT is saturated, 5 MVA power transformer is
being energize and differential relay of 4.3 MVA generators tripped.
Resulting the generator disconnected from the system and power supply
to the load stopped. In this thesis will be discuss the failure of
differential protection for CT (Current Transformers) saturation.
Analysis was conducted on the performance of CT when 5 MVA
transformer is being energize. Then it will be done through modeling
and simulating on MATLAB. From the analisys result can be look for
good alternative solution to solve the problem with transient bias
method. This method is used to increase the trip threshold of the
differential relay. Where an increase of the trip threshold (operating
current) obtained from the addition of bias current and bias transient
current.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSE 621.317 Sup p |
| Uncontrolled Keywords: | Proteksi Diferensial, Transformator Arus, Transient Bias |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1010 Electric power system stability. Electric filters, Passive. T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3226 Transients (Electricity). Electric power systems. Harmonics (Electric waves). |
| Divisions: | Faculty of Industrial Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Tondo Indra Nyata |
| Date Deposited: | 31 Dec 2018 03:52 |
| Last Modified: | 31 Dec 2018 03:52 |
| URI: | http://repository.its.ac.id/id/eprint/60122 |
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