Diagnosa Gangguan Transformator Berbasis Dissolved Gas Analysis Dengan Analisa Grafik Hexagon

Mahatma Giri, Putu Raditya (2021) Diagnosa Gangguan Transformator Berbasis Dissolved Gas Analysis Dengan Analisa Grafik Hexagon. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Transformator merupakan peralatan utama dalam suatu sistem tenaga listrik sehingga kegagalan transformator sangat penting untuk dihindari guna menjaga kelangsungan penyaluran daya listrik. Selama ini sudah banyak metode diagnosis yang dikembangkan untuk mendeteksi gangguan yang akan terjadi dalam transformator, untuk transformator berisolasi minyak, metode diagnosis yang sudah banyak dilakukan pada umumnya adalah Dissolve Gas Analysis (DGA). Tujuan dikembangkannya metode DGA tersebut adalah untuk menentukan jenis gangguan yang terjadi dalam transformator dengan menggunakan minyak isolasi sebagai media diagnosis. Selama perkembangannya metode DGA ini telah banyak berevolusi, dimulai dari metode yang konvensional sampai metode komputasi dengan cara menganalisa kandungan gas-gas yang mudah terbakar akibat gangguan yang larut dalam minyak isolasi. Di antara metode-metode DGA yang telah di standarisasi, terdapat suatu metode yang secara geometris memasukkan lima jenis gas mudah terbakar menjadi suatu ukuran dalam menentukan jenis gangguan. Hanya saja kelima jenis gas ini mewakili degradasi minyak isolasi, sedangkan gas yang mewakili degradasi kertas isolasi tidak dimasukkan dalam metode geometris ini sehingga perlu metode diagnosa lain. Hal ini mengakibatkan penentuan jenis gangguan hanya berfokus pada degradasi minyak isolasi sehingga penentuan gangguan akibat degradasi kertas isolasi dilakukan dengan metode lain dengan basis yang berbeda. Penelitian ini menawarkan suatu cara untuk memasukkan gas CO yang merupakan indikator degradasi kertas isolasi ke dalam metode geometris yang menggunakan enam kombinasi gas yang semulanya lima. Penentuan jenis gangguan dilakukan dengan memetakan gangguan yang sudah diidentifikasikan dari IEC TC 10 database ke dalam bentuk geometri hexagon. Metode komputasi dengan bantuan metode centroid dari bangun segi banyak digunakan untuk membantu pemetaan batas-batas proporsi gas-gas ke dalam hexagon dengan pertimbangan jumlah data yang sangat terbatas. Diharapkan nantinya hasil dari penelitian ini bisa digunakan untuk menentukan jenis gangguan dalam transformator baik gangguan akibat degradasi minyak isolasi maupun akibat degradasi kertas isolasi. ===================================================================================================== Transformer is the main equipment in an electric power system so that the failure of the transformer is very important to avoid in order to maintain the continuity of the distribution of electric power. So far, many diagnostic methods have been developed to detect faults that will occur in the transformer, for oil insulated transformers, the diagnosis method that has been done in general is Dissolve Gas Analysis (DGA). The purpose of developing the DGA method is to determine the type of fault that occurs in the transformer by using insulating oil as a diagnostic medium. During its development, the DGA method has evolved a lot, starting from conventional methods to computational methods by analysing the content of combustible gases generated by the faults which are dissolved in the insulating oil. Among the standardized DGA methods, there is a method that geometrically incorporates five types of combustible gas into a measure in determining the type of faults. It is just that these five types of gas represent the degradation of insulating oil, while the gas that represents degradation of insulating paper is not included in this geometric method, which causes another diagnostic method is needed. This resulted the determination of the type of faults which only focused on the degradation of the insulating oil so that the determination of the disturbance due to the degradation of the insulation paper is carried out by another method with a different base. This study offers a way to incorporate CO gas which is an indicator of the degradation of insulation paper into a geometric method that uses six gas combinations instead of five. Determination of the type of faults is done by mapping the identified faults from the IEC TC 10 database into hexagon geometry. The computational method with the help of poly shape centroid is used to help maps the limits of the proportion of gases into the hexagon with consideration of the very limited amount of data. It is expected that later the results of this study can be used to determine the type of faults in the transformer both due to degradation of insulating oil or due to degradation of insulation paper.

Item Type: Thesis (Masters)
Uncontrolled Keywords: DGA, hexagon, minyak isolasi, transformator, hexagon, oil insulation, transformer
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2551 Electric transformers.
T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3401 Insulation and insulating materials
Divisions: Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20101-(S2) Master Thesis
Depositing User: Putu Raditya Mahatma Giri
Date Deposited: 26 Feb 2021 05:11
Last Modified: 26 Feb 2021 05:11
URI: https://repository.its.ac.id/id/eprint/82918

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