ANALISIS UMUR INTERBUS TRANSFORMATOR (IBT) 275/150 kV 2X250 MVA TERHADAP PERUBAHAN PEMBEBANAN DAN SUHU
LINGKUNGAN DI GARDU INDUK BENGKAYANG
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Institusion
Institut Teknologi Perusahaan Listrik Negara
Author
CHANDRA CHARISMA, VERGUSTA
Pasra, Nurmiati
Pasra, Nurmiati
Subject
Teknik Elektro
Datestamp
2022-11-07 07:49:54
Abstract :
The Bengkayang Extra High Voltage Substation has 2 Interbus Transformer (IBT) 275/150 kV which were commercially operated in 2016 to interconnect West Borneo electricity system with Sarawak (Malaysia). In 2021, around 25% of west borneo electricity system were supplied from Malaysia. Therefore, it needs more attention to the lifetime of the transformer. The purpose of this research was to analyze the effect of loading and ambient temperature on transformer lifetime by quantitative research methods and descriptive statistical analysis technique. Based on data analysis and calculation there are correlation that the greater the load and higher the ambient temperature, the higher is the hotpost temperature. Each increase in the hot spot temperature will increase the rate of loss-of-life of the transformer, which will result in shorter transformer lifetime. Based on the average loading data in 2021, the worst rate of loss-of-life for IBT unit 1 is 0,0131 in February with an estimated remaining life is 20,52 years. Meanwhile, the worst rate of loss-of-life for IBT unit 2 is 0,0067 in April with an estimated remaining life is 20,53 years. The optimum load so that rate of loss-of-life IBT doesn?t exceed 100% is 98,3% or 81,9 MVA with ambient temperature 32,09 0C
The Bengkayang Extra High Voltage Substation has 2 Interbus Transformer (IBT) 275/150 kV which were commercially operated in 2016 to interconnect West Borneo electricity system with Sarawak (Malaysia). In 2021, around 25% of west borneo electricity system were supplied from Malaysia. Therefore, it needs more attention to the lifetime of the transformer. The purpose of this research was to analyze the effect of loading and ambient temperature on transformer lifetime by quantitative research methods and descriptive statistical analysis technique. Based on data analysis and calculation there are correlation that the greater the load and higher the ambient temperature, the higher is the hotpost temperature. Each increase in the hot spot temperature will increase the rate of loss-of-life of the transformer, which will result in shorter transformer lifetime. Based on the average loading data in 2021, the worst rate of loss-of-life for IBT unit 1 is 0,0131 in February with an estimated remaining life is 20,52 years. Meanwhile, the worst rate of loss-of-life for IBT unit 2 is 0,0067 in April with an estimated remaining life is 20,53 years. The optimum load so that rate of loss-of-life IBT doesn?t exceed 100% is 98,3% or 81,9 MVA with ambient temperature 32,09 0C
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