Analisa Kegagalan Trip Penyulang Lakarsantri Trafo 2 50 MV di GIS Karangpilang (Lakarsantri 2 50 MV Feeder Trip Failure Analysis at GIS Karangpilang)

Kadarisman, Fahmi (2022) Analisa Kegagalan Trip Penyulang Lakarsantri Trafo 2 50 MV di GIS Karangpilang (Lakarsantri 2 50 MV Feeder Trip Failure Analysis at GIS Karangpilang). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.

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Abstract

Masalah yang terjadi pada sistem jaringan tegangan menengah adalah gangguan hubung singkat yaitu masih banyaknya komponen pengaman pada instalasi listrik tidak bekerja dengan baik. Kegagalan Trip dari peralatan pengamanan Penyulang 20 KV di gardu Induk ini mengakibatkan rele Proteksi Incoming 20 KV bekerja, dimana rele tersebut akan memerintahkan PMT Kubikel Incoming 20 KV Open. Trafo 2 disini sering mengalami kegagalan trip penyulang yang mengakibatkan kubikel sisi incoming mengalami trip. Pada 21 Juli 2019, penyulang Lakarsantri Gagal trip yang menyebabkan kubikel Incoming 20 KV Trafo 2 Trip. Berdasarkan kejadian tersebut akan dibahas bagaimana koordinasi rele antara Incoming dengan Penyulang Lakarantri dan Penyulang Wiyung sebagai perbandingan. serta kelayakan PMT 20 KV, dimana dengan hasil tersebut akan diketahui penyebab dari Tripnya kubikel Incoming 20 KV akibat dari kegagalan Trip Penyulang Lakarsantri. Dari hasil perhitungan manual waktu kerja rele Penyulang didapatkan waktu 0,41 s dengan waktu kerja Incoming 0,68 s dan berdasarkan data PLN 0,3 s disisi penyulang dengan 0,69 s disisi Incoming Trafo 2 dengan Arus gangguan 4500 A menunjukkan hasil yang baik. Pada simulasi gangguan hubung singkat menggunakan Software Etap 12.6 antara data perhitungan manual dan data PLN tidak jauh berbeda dimana waktu kerja rele penyulang 0,3 s lebih cepet dari pada waktu kerja incoming dengan waktu 0,7 s yang telah sesuai dengan penyetelan. Penyebab terjadinya Trip Incoming Trafo 2 disini disebabkan oleh Tahanan Tripping coil lemah dengan hasil uji keserempakan Open PMT ∆t nya 0 ms, setelah dilakukan penggantian Tripping Coil hasil uji yang diperoleh untuk ∆t sebesar 0,45s. (The problem that occurs in the medium voltage network system is a short circuit, namely there are still many safety components in electrical installations that do not work properly. Trip failure of the 20 KV feeder security equipment at this substation causes the 20 KV Incoming Protection relay to work, where the relay will order the 20 KV Incoming Cubicle PMT to Open. Transformer 2 here often experiences feeder trip failure which causes the incoming side cubicle to trip. On July 21, 2019, the Lakarsantri feeder failed to trip which caused the Incoming 20 KV 2 Trip Transformer cubicle. Based on this incident, it will be discussed how the relay coordination between Incoming and Lakarantri Feeder and Wiyung Feeder will be discussed as a comparison. and the feasibility of a 20 KV PMT, with these results it will be known the cause of the 20 KV Incoming cubicle trip due to the failure of the Lakarsantri Feeder Trip. From the manual calculation of the feeder relay working time, we get 0.41 s with an Incoming working time of 0.68 s and based on PLN data 0.3 s on the feeder side with 0.69 s on the Incoming Transformer 2 side with a fault current of 4500 A showing good results. . In the simulation of short circuit faults using Etap 12.6 software, the manual calculation data and PLN data are not much different where the feeder relay working time is 0.3 s faster than the incoming working time with a time of 0.7 s which is in accordance with the settings. The cause of the Trip Incoming Transformer 2 here is due to the weak Tripping coil resistance with the result of the Open PMT simultaneous test t of 0 ms, after replacing the Tripping Coil the test results obtained for t of 0.45s.)

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Kegagalan Trip, Keserempakan PMT 20 KV, Koordinasi Settingan Rele
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Fakultas Teknik > Program Studi Teknik Elektro
Depositing User: 1451800049 Fahmi Kadarisman
Date Deposited: 29 Aug 2022 07:45
Last Modified: 18 Mar 2024 09:54
URI: http://repository.untag-sby.ac.id/id/eprint/19740

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