Contingency analysis on 500kV Jawa-Bali Transmission Line System based on Power Load Performance Index

The line outage of a power system may cause overloads on the lines, overvoltage on buses, and undervoltage on buses that can threat the power system security itself. The effect of the contingency of each power system element is vary. Power Load Performance Indexes as one of the contingency indexes can be implemented to rank the contingency level of each power system lines. N-1 contingency line is applied at 500 kV Jawa Bali Transmission System to rank the severe of contingency and to evaluate the effect of contingency of each element. Tanjung Jati-Ungaran line has the biggest contingency index which means it would be the worst scenario of the line outage.