Setting Rele Proteksi Differensial Pada Generator Transformator 13,8/150 kV di unit 2 PLTP Star Energy Wayang Windu
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Institusion
Institut Teknologi Perusahaan Listrik Negara
Author
Eriantono, Ashari
Mangapul T, Juara
Mangapul T, Juara
Subject
Teknik Elektro
Datestamp
2020-01-16 12:04:52
Abstract :
To fulfill the electricity needs of system reliability in order to smooth production, PLTP Wayang Windu Star Energy is one of the power generation companies that generate electricity to meet the needs of PLN system. But in it is necessary protection system which is useful to protect its component of equipment, different relay is one of transformer transformer generator relay by using current balance principle, with current transformer as component of measurement and protection, which is connected with different relay. Differential Relay Setting itself has several requirements that must be met as a safety, such as the CT used must have the same ratio of comparison so that the primary current is equal to the secondary current and the connection and polarity of CT1 and CT2 are equal. For that need to do relay differential setting with calculation of CT ratio selection, setting the relay differential itself and error mismatch. After performing the calculation, the result of choosing ideal CT ratio is 1/7000 A for the primary side of the transformer and 1/600 A, this ratio selection is based on the nominal current of the transformer on each side, the mismach error is 0.8% on the 13.8kV side of the transformer and 0.687% on the transformer side of 150kV this result can still be said good considering the limit of error mismatch is 5%. After calculating the ideal CT ratio, the differential current is calculated and the current settings obtained values of 0.528 A and 0527 A.
To fulfill the electricity needs of system reliability in order to smooth production, PLTP Wayang Windu Star Energy is one of the power generation companies that generate electricity to meet the needs of PLN system. But in it is necessary protection system which is useful to protect its component of equipment, different relay is one of transformer transformer generator relay by using current balance principle, with current transformer as component of measurement and protection, which is connected with different relay. Differential Relay Setting itself has several requirements that must be met as a safety, such as the CT used must have the same ratio of comparison so that the primary current is equal to the secondary current and the connection and polarity of CT1 and CT2 are equal. For that need to do relay differential setting with calculation of CT ratio selection, setting the relay differential itself and error mismatch. After performing the calculation, the result of choosing ideal CT ratio is 1/7000 A for the primary side of the transformer and 1/600 A, this ratio selection is based on the nominal current of the transformer on each side, the mismach error is 0.8% on the 13.8kV side of the transformer and 0.687% on the transformer side of 150kV this result can still be said good considering the limit of error mismatch is 5%. After calculating the ideal CT ratio, the differential current is calculated and the current settings obtained values of 0.528 A and 0527 A.
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