ANALISIS KONTINGENSI SISTEM TENAGA LISTRIK DENGAN METODE FAST DECOUPLED UNTUK MENGHITUNG ALIRAN DAYA DI GARDU INDUK TELLO

Abstrak

Contingency is a disturbance in the form of the release of one or more elements of the electric power system. This condition is related to the reliability of operation of an electric power system which must still carry out its duties to serve the existing load if a disturbance occurs in one of its elements. The aim of this research is to carry out a contingency analysis (N-1) based on the Performance Index using the Fast Decoupled power flow method in the Tello Main Substation electrical system with the help of MATLAB software. By combining quantitative and qualitative research methods to provide a more comprehensive understanding of system responses to system failures. Channel ranking is done based on the highest to lowest Performance Index (PI) value. The influence of the N-1 contingency on the electric power system above results in overload on buses 5-6. The first sequence is channel 5-6 with a PI value of 2.9464. Next, the second sequence is channels 1-6 with a PI value of 0.0001, on bus 1 there is a slack bus which can be a helper if there is a bus that needs power so that it doesn't drop too far which can cause overload. Furthermore, channels 1-2, 2-3, 2-5, 3-4, 4-5 with a PI value of 0.000, these channels have a smaller PI value due to minimal overload occurring when the N-1 contingency is carried out, this is due to the load being not too big on the channel and still able to support power that is not too large. Where if the PI value is greater than 1 then the PI value can be said to be overloaded and if the PI value is less than 1 then it can be said that the channel is in good condition. After carrying out a contingency simulation on the Tello Main Substation's electrical power system, it was found that the channel was experiencing overload as an impact on the system when the channel discharge occurred.