Analisis Karakteristik Kemunculan Partial Discharge Akibat Kontaminasi Pada Sambungan Kabel Tegangan Tinggi

Pratama, Cahya Dwi (2025) Analisis Karakteristik Kemunculan Partial Discharge Akibat Kontaminasi Pada Sambungan Kabel Tegangan Tinggi. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Efisiensi transfer energi listrik sangat bergantung pada kualitas isolasi kabel, khususnya pada sambungan yang rentan mengalami kegagalan akibat kontaminasi. Kegagalan isolasi dapat memicu partial discharge (PD), yang mempercepat degradasi material isolasi dan meningkatkan risiko kerusakan sistem. Penelitian ini bertujuan menganalisis karakteristik PD pada sambungan kabel XLPE akibat kontaminan seperti partikel konduktif, debu, dan air, yang disimulasikan melalui tiga jenis defect: floating discharge, surface sliding discharge, dan water bubble discharge. Sebelum pengujian PD dilakukan, pengujian tahanan isolasi menggunakan High Voltage Insulation Tester (Megger) dilakukan berdasarkan parameter Polarization Index (PI) dan Dielectric Absorption Ratio (DAR) untuk mengevaluasi kualitas isolasi sebelum dan sesudah diberi defect. Selanjutnya, pengujian PD dilakukan dengan tegangan AC pada tiga level: Partial Discharge Inception Voltage (PDIV), 1,3 PDIV, dan 1,5 PDIV. Metode Phase Resolved Partial Discharge (PRPD) digunakan untuk memetakan distribusi pulsa PD berdasarkan fase dan magnitudo-nya. Pengambilan data dilakukan menggunakan PD detector dan osiloskop digital, sedangkan analisis pola PRPD dilakukan menggunakan MATLAB. Hasil menunjukkan bahwa sambungan tanpa defect memiliki nilai PDIV tertinggi sebesar 17,97 kV, sedangkan defect water bubble menghasilkan PDIV terendah sebesar 9,86 kV. Pada tegangan 1,5 PDIV, defect water bubble juga menunjukkan aktivitas PD tertinggi dengan 84.578 titik PD dan pola PRPD yang luas dan merata. Sebaliknya, floating discharge menunjukkan jumlah titik PD terendah, yaitu 8.135 titik, tetapi memiliki peak magnitude tertinggi sebesar 0,189 V. Surface sliding discharge menghasilkan 74.687 titik PD dan berada di antara keduanya. Temuan ini diharapkan dapat menjadi referensi dalam pengembangan metode diagnosis gangguan yang terjadi pada sambungan kabel.
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The efficiency of electrical energy transfer is highly dependent on the quality of cable insulation, particularly at joints that are prone to failure due to contamination. Insulation failure can trigger partial discharge (PD), which accelerates the degradation of insulation material and increases the risk of system damage. This study aims to analyze the characteristics of PD in XLPE cable joints caused by contaminants such as conductive particles, dust, and water, simulated through three types of defects: floating discharge, surface sliding discharge, and water bubble discharge. Before PD testing was conducted, insulation resistance testing using a High Voltage Insulation Tester (Megger) was performed based on the Polarization Index (PI) and Dielectric Absorption Ratio (DAR) parameters to evaluate insulation quality before and after defect introduction. Next, PD testing was conducted with AC voltage at three levels: Partial Discharge Inception Voltage (PDIV), 1.3 PDIV, and 1.5 PDIV. The Phase Resolved Partial Discharge (PRPD) method was used to map the distribution of PD pulses based on their phase and magnitude. Data acquisition was performed using a PD detector and a digital oscilloscope, while PRPD pattern analysis was conducted using MATLAB. The results showed that the defect-free joint had the highest PDIV value of 17.97 kV, while the water bubble defect produced the lowest PDIV value of 9.86 kV. At a voltage of 1.5 PDIV, the water bubble defect also showed the highest PD activity with 84,578 PD points and a wide and uniform PRPD pattern. Conversely, floating discharge showed the lowest number of PD points, namely 8,135 points, but had the highest peak magnitude of 0.189 V. Surface sliding discharge produced 74,687 PD points and was between the two. These findings are expected to serve as a reference in developing diagnostic methods for faults occurring in cable joints.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Partial Discharge, Sambungan Kabel, Kontaminan, PRPD, Partial Discharge, Cable Joint, Contaminant, Phase Resolve PD
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK201 Electric Power Transmission T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3401 Insulation and insulating materials
Divisions:	Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	Cahya Dwi Pratama
Date Deposited:	24 Jul 2025 05:19
Last Modified:	24 Jul 2025 05:19
URI:	http://repository.its.ac.id/id/eprint/121120

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