ANALISA KONDISI TRANSFORMTOR BERDASARKAN GAS TERLARUT DALAM MINYAK TRANSFORMTOR DENGAN MENGGUNAKAN METODE DISSOLVED GAS ANALYSIS (DGA) PADA PLTGU MUARA KARANG BLOK 2
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Institusion
Institut Teknologi Perusahaan Listrik Negara
Author
Abdal, Rivai Nur
Ispranyoto, Edy
Ispranyoto, Edy
Subject
Teknik Elektro
Datestamp
2019-12-05 12:50:48
Abstract :
Failures that generally occur in power transformers are both temperature failure and electrical failure. generally produce harmful gases which are commonly known as fault gases. By identifying the type and amount of gas concentration dissolved in oil can provide information that there is an indication of failure in the transformer. This research will discuss the method of DGA (Dissolved Gas Analysis) which is used as a treatment for transformer oil by using two methods of the Total Combustible Gas method and the Key Gas method to analyze the use of oil transformers. The results obtained are the transformer is still in normal conditions, the action that can be done is to improve testing / diagnosis of the transformer. In the transformer that was tested was in one condition or in normal conditions using a flammable gas analyzer detected as much as 297 ppm of gas. By using the key gas, the results show that there are two dominant gases in the transformer namely ethane gas of 35,690% and carbon monoxide gas of 36,700%. this indicates heating of the insulating oil at a temperature of 300-500?C and overheating of cellulose paper. In addition to testing the gas content in oil, a breakdown voltage test is also carried out to determine the extent of the oil's ability to withstand stress stress, a satisfactory result is obtained, with an average value of 62.4 kV and based on the provisions of the standard value for voltage testing is above 50 kV.
Failures that generally occur in power transformers are both temperature failure and electrical failure. generally produce harmful gases which are commonly known as fault gases. By identifying the type and amount of gas concentration dissolved in oil can provide information that there is an indication of failure in the transformer. This research will discuss the method of DGA (Dissolved Gas Analysis) which is used as a treatment for transformer oil by using two methods of the Total Combustible Gas method and the Key Gas method to analyze the use of oil transformers. The results obtained are the transformer is still in normal conditions, the action that can be done is to improve testing / diagnosis of the transformer. In the transformer that was tested was in one condition or in normal conditions using a flammable gas analyzer detected as much as 297 ppm of gas. By using the key gas, the results show that there are two dominant gases in the transformer namely ethane gas of 35,690% and carbon monoxide gas of 36,700%. this indicates heating of the insulating oil at a temperature of 300-500?C and overheating of cellulose paper. In addition to testing the gas content in oil, a breakdown voltage test is also carried out to determine the extent of the oil's ability to withstand stress stress, a satisfactory result is obtained, with an average value of 62.4 kV and based on the provisions of the standard value for voltage testing is above 50 kV.
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