ANALISIS KEMAMPUAN MINYAK ISOLASITRANSFORMATOR BERDASARKAN HASIL UJI DISSOLVED GAS ANALYSIS DAN BREAKDOWN VOLTAGEDI GARDU INDUK 150 KV
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Institusion
Institut Teknologi Perusahaan Listrik Negara
Author
FEBBY YULIANTINA, NANDA
Samsurizal, Samsurizal
Samsurizal, Samsurizal
Subject
Teknik Elektro
Datestamp
2022-11-01 03:11:21
Abstract :
Transformer is an important equipment in distributing electrical energy. So that the failure of the transformer can interfere with the distribution of electrical energy. The insulating oil in the transformer has an important role because in addition to functioning as insulation it also functions as a coolant in the transformer. As an insulating oil must have the ability to withstand breakdown voltages and as a coolant oil must have the ability to reduce the heat generated in the transformer. Therefore routine maintenance is important to do. The method used for testing transformer isolation is Dissolved Gas Analysis (DGA) and Breakdown Voltage (BDV). DGA diagnosis is carried out to determine the rate of gas growth in oil in parts per million (ppm). The results obtained from testing the transformer unit 6 at the 150 kV Bogor Baru Substation with the Total Dissolve Combustible Gas (TDCG) method can be used to determine the DGA test schedule, Key Gas obtained very high CO content with a percentage in the first test 34.83% and the second test 35.99% with an indication of overheated cellulose (thermal-cellulose) failure due to overheating of the transformer, resulting in deterioration of the paper insulation, while using the Duval Triangle it is indicated that the transformer has a thermal fault failure < 300?. The Breakdown Voltage value of the unit 6 transformer is 86.0 kV/2.5 mm, which means that the transformer insulation oil is still in good condition and is still suitable for use.
Transformer is an important equipment in distributing electrical energy. So that the failure of the transformer can interfere with the distribution of electrical energy. The insulating oil in the transformer has an important role because in addition to functioning as insulation it also functions as a coolant in the transformer. As an insulating oil must have the ability to withstand breakdown voltages and as a coolant oil must have the ability to reduce the heat generated in the transformer. Therefore routine maintenance is important to do. The method used for testing transformer isolation is Dissolved Gas Analysis (DGA) and Breakdown Voltage (BDV). DGA diagnosis is carried out to determine the rate of gas growth in oil in parts per million (ppm). The results obtained from testing the transformer unit 6 at the 150 kV Bogor Baru Substation with the Total Dissolve Combustible Gas (TDCG) method can be used to determine the DGA test schedule, Key Gas obtained very high CO content with a percentage in the first test 34.83% and the second test 35.99% with an indication of overheated cellulose (thermal-cellulose) failure due to overheating of the transformer, resulting in deterioration of the paper insulation, while using the Duval Triangle it is indicated that the transformer has a thermal fault failure < 300?. The Breakdown Voltage value of the unit 6 transformer is 86.0 kV/2.5 mm, which means that the transformer insulation oil is still in good condition and is still suitable for use.
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