ABSTRACT

Fiqri Mulwy, Security Constrained Optimal Power Flow with Post-Contingency Corrective Rescheduling (supervised by Muhammad Arief and Nadjamuddin Harun).

Security control is a prevention effort to maintain the normal condition of an electrical power system. This is a case study to describe the condition of the electrical power system in South Sulawesi, Indonesia, when a generation outage or line outage occurs and the generation units are rescheduled as a contingency plan. The main concerns are the continuity of the power flow, the optimization of the operation and the quality of customer services. 

The application of network sensitivity method has been used to determine the power flow when a disturbance occurs and the abnormal operating condition of the system is optimized by rescheduling the power generation using merid loading and linear-programming methods. 

The simulation has shown that an outage of Sengkang generator bus is causing all Sidrap-Parepare; Soppeng-Sidrap and Sengkang-Soppeng transmission lines change 138.1 MW in average. It has also shown that the outage of Parepare-Pangkep transmission line is causing Pare-pare-Barru and Barru-Pangkep transmission lines change 75.158 MW in average. The outage of Pangkep-Tello transmission line, is overloading Pangkep-Bosowa transmission line additional 38.5031 MW of power. The outage of Sengkang-Soppeng transmission line is causing all Parepare-Barru, Bosowa-Tello and Mandai-Daya transmission lines change 61.97 MW in average, while the outage of Tello-Tallo Lama transmission line is causing Barru-Pangkep transmission line changes at the level of 21.72 MW.  The rescheduling of the generators at the peak load of 413.2 MW is optimized economically at the rate of Rp. 526,27/kWh.

The case study has shown that the optimal power flow can be maintained by rescheduling the generators when disturbances due to power outage occur. 

Keywords: Optimal Power Flow (OPF), system security, contingency, rescheduling.