IMPLEMENTASI SISTEM GROUNDING NGR PADA GENERATOR UNTUK MEREDUKSI ARUS GANGGUAN SATU FASA KE TANAH PADA PLTD TERONG RAYON ADONARA

Lau, Ricardo Stenli (2019) IMPLEMENTASI SISTEM GROUNDING NGR PADA GENERATOR UNTUK MEREDUKSI ARUS GANGGUAN SATU FASA KE TANAH PADA PLTD TERONG RAYON ADONARA. Skripsi thesis, Institut Teknologi Nasional Malang.

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Abstract

IMPLEMENTASI SISTEM GROUNDING NGR PADA GENERATOR UNTUK MEREDUKSI ARUS GANGGUAN SATU FASA KE TANAH PADA PLTD TERONG RAYON ADONARA Ricardo Stenli Lau Email : ricardo_stenly@yahoo.com Dosen Pembimbing : Dr. Eng. Ir. I Made Wartana, MT Ir. Ni Putu Agustini, MT Peminatan Teknik Energi Listrik Program Studi Teknik Elektro S-1 Fakultas Teknologi Industri, Institut Teknologi Nasional Malang Jl. Raya Karanglo Km. 2 Malang Abstrak Gangguan arus hubung singkat (1 fasa ketanah) yang besar pada generator dapat mengakibatkan generator terganggu dan berbahaya dengan sistem pentanahan solid yang masih digunakan pada PLTD Terong Adonara. Sistem pengamanan yang digunakan untuk mengisolasi gangguan yaitu penggunaan rele Ground Fault Relay (GFR) dimana GFR tidak dapat bekerja jika tidak ada sistem pentanahan netralnya. Penggunaan pentanahan netral solid dan Neutral Grounding Resistor (NGR) digunakan dalam penelitian ini guna mengetahui setting rele yang tepat ketika terjadi gangguan 1 fasa ke tanah serta melakukan perbandingan antara sistem pentanahan netral yang digunakan dalam setting rele GFR. Hasil analisa hubung singkat dengan pentanahan solid diketahui arus gangguan maksimum sebesar 1,47 kA, sedangkan dengan pentanahan NGR diketahui arus gangguan maksimum sebesar 0,110 kA. Setting waktu kerja rele yang didapat dari sistem pentanahan solid (settingan awal PLN) yaitu 0,3 s pada Penyulang 1 dan penyulang 2. Setting waktu kerja rele yang didapat dari sistem pentanahan NGR yaitu 0,283 s pada penyulang 1 dan 0,297 s pada penyulang 2. Dalam hal ini penggunaan NGR lebih efektif sebagai pentanahan netral karena bisa mereduksi besar arus hubung singkat yang terjadi sehingga tidak membahayakan peralatan dan manusia di sekitar. Kata Kunci – Solid Grounding, NGR (Neutral Grounding Resistance), GFR (Ground Fault Relay) NGR GROUNDING SYSTEM IMPLEMENTATION OF GENERATOR TO REDUCE SINGLE PHASE TO GROUND FAULT CURRENT IN PLTD TERONG RAYON ADONARA Ricardo Stenli Lau Email : ricardo_stenly@yahoo.com Advisor : Dr. Eng. Ir. I Made Wartana, MT Ir. Ni Putu Agustini, MT Specialization of Electrical Energy Engineering Electrical Engineering Study Program S-1 Faculty of Industrial Technology, National Institute of Technology Malang Jl. Raya Karanglo Km. 2 Malang Abstract The high short circuit fault current level (single-phase-to-ground) in generator can causing the generator disturbed and dangerous with solid system that still used in PLTD Terong Adonara. The security system used to isolate the fault is the use of Ground Fault Relay (GFR), where GFR can not work properly if there is no neutral grounding system. The use of solid neutral ground and neutral grounding resistor (NGR) are used in this study to determine the proper setting of relay when single phase to ground fault occurs and to compare the neutral grounding system used in the GFR release setting. The result of solid ground is known the maximum fault current is 1,47 kA, whereas with NGR grounding it is known that maximum fault current is 0,110 kA. Setting the working time of relay obtained from solid grounding sytem (PLN settings) that is 0,3 s at feeder 1 and feeder 2. Setting the working time of relay obtained from NGR system that is 0.283 s at feeder 1 and 0.297 s at feeder 2. In this case the use of NGR is more effective as a neutral grounding because it can reduce the high short circuit current that occurs so that not harm the equipment and humans around. Keyword – Solid Grounding, NGR (Neutral Grounding Resistance), GFR (Ground Fault Relay)

Item Type:	Thesis (Skripsi)
Additional Information:	Ricardo Stenli Lau NIM 12.12.046
Uncontrolled Keywords:	Solid Grounding, NGR (Neutral Grounding Resistance), GFR (Ground Fault Relay)
Subjects:	Engineering > Electrical Engineering
Divisions:	Fakultas Teknologi Industri > Teknik Elektro S1 > Teknik Elektro S1(Skripsi)
Depositing User:	Ms Nunuk Yuli
Date Deposited:	04 Jan 2020 02:37
Last Modified:	04 Jan 2020 03:12
URI:	http://eprints.itn.ac.id/id/eprint/4517

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