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Optimal Power Flow (OPF) is to optimize power flow in interconnection systems to decrease production costs and increase system reliability, quality, and stability. This research was conducted on power generation 150 KV systems in South Sulawesi, Southeast Sulawesi, and West Sulawesi, abbreviated as Sulselrabar. The number of buses is 44, 15 generator buses before penetration with the Sidrap Wind Power Plant (PLTB), and 16 bus generators after penetration with PLTB. The method used in this study is Improved Particle Swarm Optimization (IPSO) and Lagrange. The results showed that IPSO showed better results compared to Lagrange and the results of existing systems.

This study presents stability analysis using a new approach to model the disturbances that occur in multi-machine systems connected with wind turbines. Consideration of stability and operability of conventional electric power systems planning and developing facing problems with the integration of installations in wind power plants (WPP) is needed because the current system is connected with renewable energy. This study highlighting the effects of WPP connected to a multi-engine 9 bus system from the effect of changes in disturbances occurring on several buses when operating. Disruption in multi-machine systems connected with wind turbines can affect system stability. The noise changes from bus to bus in the voltage drop effect on the system bus. The effect of wind turbine when a fault has a small moment of inertia can make the system unstable on the bus. The results of simulations carried out using ETAP to observe system stability have been carried out. The simulation results show that a system disruption that occurs in a multi engine system connected to the wind turbine does not result in a decrease in the bus near the fault then the stability decreases.

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