Deteksi Partial Discharge pada Isolasi Cair dengan Teknik Ultra High Frequency (UHF)

Al'Azmi, Hadi Lizikri (2018) Deteksi Partial Discharge pada Isolasi Cair dengan Teknik Ultra High Frequency (UHF). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Partial Discharge (PD) merupakan suatu fenomena yang terjadi
pada peralatan tegangan tinggi ketika pre-breakdown. Kondisi ini menghubungkan dua elektroda yang seharusnya terpisah. Partial Discharge dapat terjadi pada isolasi minyak sehingga menyebabkan penurunan kualitas dari transformator dan circuit breaker tegangan tinggi. Kerusakan tersebut terjadi karena setelah PD akan terjadi breakdown voltage yang akan menghasilkan panas, arc dan karbonisasi. Tugas akhir ini bertujuan untuk mendeteksi PD pada beberapa kondisi serta memvalidasi hasil sehingga dapat menghindari fenomena breakdown yang menghasilkan arc. Pengujian dilakukan dengan menggunakan pembangkitan tegangan tinggi AC berelektroda point to plane. Partial Discharge yang dihasilkan pada isolasi cair akan dideteksi dengan metode UHF dan leakage current. Metode UHF mendeteksi PD dengan antenna dan menghasilkan sinyal digital dan spectrum waterfall. Sinyal tersebut akan dikonversi menjadi kuat sinyal (dBm) agar hasil dapat dianalisa. Metode leakage current mendeteksi arus bocor yang di plot menjadi sinyal arus. Analisa dilakukan pada beberapa kondisi jarak dan diameter elektroda. Hasil yang diperoleh adalah perubahan kuat sinyal yang dipengaruhi oleh diameter dan jarak elektroda. Hasil akan divalidasi dan dibandingkan dengan metode leakage current dan waterfall spectrum. Berdasarkan hasil yang diperoleh dapat diketahui bahwa Metode UHF dapat menampilkan perbedaan kuat sinyal untuk deteksi Partial Discharge mulai kondisi normal, pre-breakdown, hingga breakdown sedangkan metode leakage current hanya dapat mendeteksi PD beberapa saat sebelum breakdown. ============ Partial Discharge (PD) is a phenomenon happened in high voltage equipment when pre-breakdown condition. This condition connected two electrodes which should be separated. Partial Discharge can occur in oil insulation causing degrardation quality of transformer and high voltage circuit breaker. The damage occurs because breakdown voltage will occur after PD and will generate heat, arc and carbonization. This final project aims to detect PD in several conditions and validate the results then avoid the arc from breakdown phenomenon. Experiment using AC high voltage generation with point to plane electrode. Partial discharge that generated in liquid insulation will be detected by UHF and leakage current methods. UHF method detects PD with antenna and produces digital signal and spectrum waterfall. The signal will be converted to signal strength (dBm) for analysis purpose. Leakage current method detects leakage current then plot it into current signal. Analyzes were performed on some electrode gap distance conditions and diameter. The results are changes of power signals affected by diameter and gap distance of the electrode. The results will be validated and compared with leakage current and waterfall spectrum methods. Based on these results it is known that UHF method can detect power signal better than other method with high sensitivity. Partial Discharge (PD) is a phenomenon happened in high voltage equipment when pre-breakdown condition. This condition connected two electrodes which should be separated. Partial Discharge can occur in oil insulation causing degrardation quality of transformer and high voltage circuit breaker. The damage occurs because breakdown voltage will occur after PD and will generate heat, arc and carbonization. This final project aims to detect PD in several conditions and validate the results then avoid the arc from breakdown phenomenon. Experiment using AC high voltage generation with point to plane electrode. Partial discharge that generated in liquid insulation will be detected by UHF and leakage current methods. UHF method detects PD with antenna and produces digital signal and spectrum waterfall. The signal will be converted to signal strength (dBm) for analysis purpose. Leakage current method detects leakage current then plot it into current signal. Analyzes were performed on some electrode gap distance conditions and diameter. The results are changes of power signals affected by diameter and gap distance of the electrode. The results will be validated and compared with leakage current and waterfall spectrum methods. Based on these results it is known that UHF method can detect power signal better than other method with high sensitivity.

Item Type:	Thesis (Undergraduate)
Additional Information:	RSE 621.319 37 Ala d
Uncontrolled Keywords:	diameter, jarak, Leakage Current, Partial Discharge, UHF, Diameter, Gap distance, Leakage current, Spectrum waterfall
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7871.674 Detectors. Sensors T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7872 Electromagnetic Devices
Divisions:	Faculty of Electrical Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	Al - Azmi Hadi Lizikri
Date Deposited:	26 Nov 2018 03:12
Last Modified:	22 Apr 2021 03:53
URI:	http://repository.its.ac.id/id/eprint/52859

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