ANALISIS KOORDINASI PROTEKSI TRANSFORMATOR MENGGUNAKAN ETAP PADA PLTU UPK TARAHAN
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Institusion
Institut Teknologi Perusahaan Listrik Negara
Author
Nur Adi, Ramadhan
Sari, Dewi Purnama
Sari, Dewi Purnama
Subject
Teknik Elektro
Datestamp
2022-11-07 03:48:50
Abstract :
Overcurrent faults, earth faults are the types of disturbances that will be discussed in the 6.3 kV medium voltage system, the Auxiliary Transformer unit 3 located in the PLTU UPK Tarahan area. To overcome these disturbances Overcurrent Relay (OCR), Ground Fault Relay (GFR) and Differential Relay, the relay will give orders to the CB to cut off the voltage. The short circuit current line to ground is the highest short circuit fault of 26,830 kA, this disturbance is influenced by the total existing impedance. The differential relay will work when an internal fault occurs, when there is a disturbance in the external zone the differential relay works to overcome the disturbance. It takes 300 ms to read the fault on the differential relay for CB Trip simultaneously, 412 ms on the outgoing side and 1521 ms on the incoming side of the OCR relay with 3 phase fault simulation and 473 ms in the phase to ground fault simulation, the calculation results obtained that the relay overcomes the fault faster with 125 ms fault to overcome the CB fault for Trip simultaneously, 340 ms ongoing side ,and 669 incoming side as a back up
Overcurrent faults, earth faults are the types of disturbances that will be discussed in the 6.3 kV medium voltage system, the Auxiliary Transformer unit 3 located in the PLTU UPK Tarahan area. To overcome these disturbances Overcurrent Relay (OCR), Ground Fault Relay (GFR) and Differential Relay, the relay will give orders to the CB to cut off the voltage. The short circuit current line to ground is the highest short circuit fault of 26,830 kA, this disturbance is influenced by the total existing impedance. The differential relay will work when an internal fault occurs, when there is a disturbance in the external zone the differential relay works to overcome the disturbance. It takes 300 ms to read the fault on the differential relay for CB Trip simultaneously, 412 ms on the outgoing side and 1521 ms on the incoming side of the OCR relay with 3 phase fault simulation and 473 ms in the phase to ground fault simulation, the calculation results obtained that the relay overcomes the fault faster with 125 ms fault to overcome the CB fault for Trip simultaneously, 340 ms ongoing side ,and 669 incoming side as a back up
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