Optimal power flow for power system interconnection considering wind power plants intermittency

Abstract

The rise of global warming issues and limitation of fossil resources encourages a large number of power plant construction generated by renewable energy. One of the promising renewable energy power generation is the wind power plant. However, the variable of wind speeds may cause problems to its management system and power dispatch of the power grid. The fluctuation of energy demand and wind speed are the main issues regarding the wind power plants (WPP) integration into interconnected power systems. Optimal power flow (OPF) method will determine the optimal operating conditions of the electric network that experiences physical and operational barriers. Factors that determine the optimal point are formulated based on the optimization algorithm method. The primary purpose of the method is to specify the settings of the OPF variable controls and systems of equations that optimize the value function of the objective. The selection of this function should be analyzed carefully based on the electrical power system's technical and economical aspects. Currently in Indonesia, 70 MW capacity of WPP have been built in the Sidrap Regency in the Southern Sulawesi power system and this WPP will be integrated with other thermal generations in the interconnected power system to supply a 1050-1100 MW maximum load. This study evaluates the WPP's output considering the WPP intermittency constraint (the various wind speed) then assesses the optimal power flow results for the Southern Sulawesi case.

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