ANALISA KOORDINASI SETTING PROTEKSI INCOMING DAN PENYULANG PADA TRANSFORMATOR 60 MVA DENGAN MENGGUNAKAN POLA NON-CASCADE PADA GARDU INDUK BINTARO BARU
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Institusion
Institut Teknologi Perusahaan Listrik Negara
Author
ZULVI NUR AISYAH PUTRI, RAISSYA
Widyastuti, Christine
Widyastuti, Christine
Subject
Teknik Elektro
Datestamp
2022-11-03 02:09:23
Abstract :
A widely used pattern is a type of cascade. But in reality, the cascade has not been able to provide optimal security on the incoming side and the feeder side. The problem that occurs is that there was a 20 kV busbar fault with a fault current of up to 12 kA with a long clearing time that could reduce the resistance of the transformer and cause permanent damage to the transformer. So a pattern was made, namely a non-cascade pattern. The data analysis method used is a descriptive statistical method. Before using the non cascade pattern the time is 0.4 s for MOC refiners. While the incomingtime is 0.5 s MOC. When the non cascade pattern values are for MOC 1 0.1 s and MOC 2 0.7 s, respectively. Non-cascade pattern with trip access and short circuit disturbance conditions of 4800 A, Time delay (Td) for 0.3306 s and stressload of 26,977 MegaJoules (MJ). Then when the incoming successful trip short circuit fault of 4800 A and Td of 0.5505 s, a stress load of 44.921 MJ was obtained. Then using a cascade pattern with a successful trip feeder and a disturbance current of 4800 A and a Td of 0.3306 s, a stress load of 26,977 MJ was obtained. Then the condition of the incoming successful trip with a disturbance of 4800 A and Td of 0.7 s, the stress load received by the transformer was 57.12 MJ. Changing the security pattern from a cascade pattern to a non-cascade pattern can improve the reliability of the relay and can minimize transformer damage.
A widely used pattern is a type of cascade. But in reality, the cascade has not been able to provide optimal security on the incoming side and the feeder side. The problem that occurs is that there was a 20 kV busbar fault with a fault current of up to 12 kA with a long clearing time that could reduce the resistance of the transformer and cause permanent damage to the transformer. So a pattern was made, namely a non-cascade pattern. The data analysis method used is a descriptive statistical method. Before using the non cascade pattern the time is 0.4 s for MOC refiners. While the incomingtime is 0.5 s MOC. When the non cascade pattern values are for MOC 1 0.1 s and MOC 2 0.7 s, respectively. Non-cascade pattern with trip access and short circuit disturbance conditions of 4800 A, Time delay (Td) for 0.3306 s and stressload of 26,977 MegaJoules (MJ). Then when the incoming successful trip short circuit fault of 4800 A and Td of 0.5505 s, a stress load of 44.921 MJ was obtained. Then using a cascade pattern with a successful trip feeder and a disturbance current of 4800 A and a Td of 0.3306 s, a stress load of 26,977 MJ was obtained. Then the condition of the incoming successful trip with a disturbance of 4800 A and Td of 0.7 s, the stress load received by the transformer was 57.12 MJ. Changing the security pattern from a cascade pattern to a non-cascade pattern can improve the reliability of the relay and can minimize transformer damage.
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