Deteksi Partial Discharge pada Isolasi Minyak Menggunakan Loop Antenna

Andianto, Catur (2019) Deteksi Partial Discharge pada Isolasi Minyak Menggunakan Loop Antenna. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Partial discharge merupakan suatu fenomena yang terjadi pada peralatan tegangan tinggi akibat pelepasan muatan listrik yang terjadi pada suatu bahan isolasi. Pada bahan isolasi minyak, aktivitas partial discharge menghasilkan panas, arc, dan gelembung. Aktivitas partial discharge lama kelamaan akan mengakibatkan breakdown pada bahan isolasi sehingga dapat merusak peralatan. Pada peralatan listrik, fenomena partial discharge tidak dapat terdeteksi secara visual. Gelombang elektromagnetik yang dihasilkan partial discharge dapat menembus peralatan listrik sehinga bisa dideteksi dengan suatu peralatan eksternal. Salah satu contoh peralatan yang dapat mendeteksi partial discharge adalah antena. Pada tugas akhir ini akan membahas deteksi partial discharge pada isolasi minyak menggunakan loop antenna. Pembangkitan tegangan tinggi AC akan dihubungkan dengan elektroda point to plate yang direndam pada minyak isolasi dengan variasi jarak elektroda 1cm, 1,5cm, dan 2cm. Pengujian dilakukan pada kondisi belum bertegangan (normal), pre-breakdown, dan 1 detik sebelum breakdown. Loop antenna akan dihubungkan dengan Osiloskop sehingga hasil sinyal dapat diubah kedalam nilai tegangan. Hasil sinyal tersebut akan diolah sehingga menampilkan Phase Resolved Partial discharge (PRPD) dan divalidasi dengan sinyal yang ditangkap oleh HFCT. Hasil yang didapatkan adalah semakin jauh jarak elektroda maka tegangan input semakin tinggi. Semakin tinggi tegangan input menyebabkan semakin besarnya nilai muatan dan banyaknya pulsa partial discharge.
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Partial discharge is a phenomenon that occurs in high voltage equipment due to the release of electrical charges that occur in an insulating material. In oil insulating materials, partial discharge activity produces heat, arc, and bubbles. Partial discharge activities over time will result in breakdown of insulation materials so that it can damage equipment. In electrical equipment, the partial discharge phenomenon cannot be detected visually. Electromagnetic waves produced by partial discharge can penetrate electrical equipment so that it can be detected by an external device. One example of a device that can detect a partial discharge is an antenna. In this final project, we will discuss the detection of partial discharge in oil isolation using loop antenna. The high voltage AC generation will be connected to the point to plate electrode soaked in insulating oil with variations in the electrode distance of 1cm, 1.5cm, and 2cm. Tests are carried out on a condition that has not been voltageed (normal), pre-breakdown, and 1 second before the breakdown. The antenna loop will be connected to an oscilloscope so that the signal output can be changed into a voltage value. The result of the signal will be processed so that it displays the Phase Resolved Partial discharge (PRPD) and is validated with the signal captured by the HFCT. The results obtained are the further the distance of the electrode, the higher the input voltage. The higher the input voltage causes the greater the value of the load and the number of partial discharge pulses.

Item Type:	Thesis (Other)
Additional Information:	RSE 621.319 37 And d-1 2019
Uncontrolled Keywords:	Partial discharge, loop antenna, breakdown, HFCT.
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3401 Insulation and insulating materials T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7871.6 Antennas (Electronics)
Divisions:	Faculty of Electrical Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	Catur Andianto
Date Deposited:	02 Mar 2023 01:57
Last Modified:	02 Mar 2023 01:57
URI:	http://repository.its.ac.id/id/eprint/63576

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