Optimasi Pengaturan Tap Changer Transformator Menggunakan Artificial Bee Colony Untuk Meminimalkan Kerugian Daya ( Studi Kasus: Pt. Inalum)

Abstract

The transformer provides an additional facility in the form of an on load tap changing transformer which can be used for voltage stability as well as repairing and regulating the power flow and voltage profile of a distribution network system. The position of the transformer tap can also change the impedance of the transformer so that it will affect the flow of power in the system. Changing the transformer tap changer will directly change the voltage profile of the bus associated with the transformer tap. The influence of the transformer tap will also affect the flow of system power and the amount of power supplied to the system. Changes in the voltage and power flow of this system will also change the amount of current flowing between these buses and will also affect other buses and affect system power losses. In this thesis, setting the tap changer value of the transformer is carried out on the PT.INALUM (persero) Kuala Tanjung network system, where the transformer in that company has the tap changer value already tapped, therefore an evaluation is carried out for each tap changer value on the transformer that has been tapped in that company using the Artificial Bee Colony (ABC) Algorithm to obtain the value of the newly reviewed transformer tap changer from minimum power losses. System power flow studies were carried out on changes in the value of the transformer tap changer after being evaluated and the values of power losses, total power supplied to the system, current and voltage profile were obtained. By comparing the results of the power flow study before and after the evaluation, it was found that the power losses decreased from 1666.1 kW and 56741.9 kvar before the evaluation decreased to 1586 kW and 54042.6 kvar after the evaluation, the system power losses decreased of 80.1 kW or 4.8% for active power losses and 2699.3 kvar or 4.75% for reactive power losses.