ANALISA INRUSH CURRENT DAN TRANSIENT OVERVOLTAGE TRANSFORMATOR 292 MVA DENGAN PENGUJIAN LINE CHARGING STUDI KASUS PADA PLTGU CILEGON

PRABOWO, RIZKY DRAJAT (2021) ANALISA INRUSH CURRENT DAN TRANSIENT OVERVOLTAGE TRANSFORMATOR 292 MVA DENGAN PENGUJIAN LINE CHARGING STUDI KASUS PADA PLTGU CILEGON. S1 thesis, Universitas Mercu Buana Jakarta.

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Abstract

The reliability of systems and equipment that provide electricity supply to consumers is the main focus in efforts to provide electrical energy, to ensure that reliability, a series of tests are carried out in the electrical system, one of these tests is line charging testing, line charging testing is a condition where the generating machine operates isolated for provide supply to transmission lines, transmission equipment and to loads, under conditioned situations. The important equipment that has the possibility of failure in the test is the transformator. The impact of transformator operation in line charging testing is the occurrence of inrush current and transient overvoltage, this has the potential to reduce transformator reliability. This study was conducted to determine the value of inrush current, transient overvoltage and determine the impact on transformators from modeling simulation data and actual data of line charging tests. Based on the results of the analysis, the largest inrush current and transient overvoltage were obtained from modeling with the switching method at 52L with a value of 6.56 kA and 307.3 kV. The transient overvoltage value from the simulation results shows a result of 2.5 times the nominal voltage. If it done continuously will cause the failure transformator operation. The most effective method to reduce the inrush current is the switching method on 52G with sequential switch, with this method the inrush current decreased by 83.6% from the 52G method. Keywords : Line charging, transformator, inrush current, transient overvoltage Kehandalan sistem dan peralatan yang memberikan supply listrik kepada konsumen menjadi fokus utama dalam upaya penyediaan energi listrik. Untuk memastikan kehandalan tersebut dilakukan serangkaian pengujian dalam sistem kelistrikan, salah satu pengujian tersebut adalah pengujian line charging. Pengujian line charging adalah kondisi dimana mesin pembangkit beroperasi isolated untuk memberikan supply ke saluran transmisi, peralatan transmisi dan ke beban, dalam situasi yang dikondisikan. Peralatan penting yang memiliki kemungkinan failure dalam pengujian tersebut adalah transformator. Dampak operasi transformator dalam pengujian line charging adalah terjadinya inrush current dan transient overvoltage. Hal tersebut memiliki potensi mengurangi kehandalan transformator. Penelitian ini dilakukan untuk mengetahui nilai inrush current, transient overvoltage dan mengetahui dampaknya terhadap transformator dari data hasil simulasi pemodelan dan data aktual pengujian line charging. Berdasarkan hasil analisa yang dilakukan inrush current dan transient overvoltage terbesar diperoleh dari pemodelan dengan metode switching pada 52L dengan nilai 6.56 kA dan 307.3 kV. Nilai transient overvoltage dari hasil simulasi menunjukkan hasil 2.5 kali dari tegangan nominalnya, hal ini jika dilakukan terus menerus akan menyebabkan kegagalan operasi transformator. Metode yang paling efektif untuk menurunkan inrush current adalah metode switching pda 52G dengan sequential switch, dengan metode ini didapatkan penurunan inrush current sebesar 83.6 % dari metode 52G. Kata Kunci : Line charging, transformator, inrush current, transient overvoltage

Item Type: Thesis (S1)
NIM/NIDN Creators: 41419120164
Uncontrolled Keywords: Line charging, transformator, inrush current, transient overvoltage
Subjects: 600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan
600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 621 Applied Physics/Fisika terapan
Divisions: Fakultas Teknik > Teknik Elektro
Depositing User: Dede Muksin Lubis
Date Deposited: 02 Nov 2023 01:33
Last Modified: 02 Nov 2023 01:33
URI: http://repository.mercubuana.ac.id/id/eprint/83687

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