Abstract

Growing penetration of renewable sources of power generation around the world causes a decline in the inertia of power grids. This poses a direct risk to safe operation of power systems, as frequency stability becomes difficult to be maintained and managed. Being able to predict and react to grid frequency variations is crucial to ensure reliable supply of electricity. This paper developed an integrated model of wind turbine system with power grid model for frequency stability investigation with the objective to evaluate how renewable wind generation impacts the frequency stability. A model of the conventional 10 GW power generation system based on load frequency control (LFC) and automatic generation control (AGC) incorporated with 2 MW full power converter wind turbine, was demonstrated in this paper. The proposed model will demonstrate a loss of 1 GW of generation for a 10 GW grid, the model will then be examined and simulated to ensure the validity of the results. It has been concluded that load frequency control LFC was not able to restore system frequency to nominal on its own and automatic generation control AGC is needed to fully restore the 50 Hz of the grid.