Simulation modeling of the dynamics of the process of charging the pumped hydro storage station from wind turbine installation

Abstract

Mathematical and simulation models of the dynamics of the process of water flow rate by a multi-unit hydraulic pumping station powered by wind electric installation taking into account the stochastic change of the instantaneous value of wind speed have been developed. The simulation model implements the solution of differential nonlinear equations describing the dynamics of rotational motion of a two-mass electro-hydro-mechanical system. The mutual influence of one inertial component on another is carried out through the electrical connection between the wind turbine generator and the electric motor of the hydraulic turbine. The model takes into account the nonlinearity of the aerodynamic characteristics of the wind turbine from the speed and angle of rotation of the blades the nonlinearity of the hydromechanical characteristics of the hydraulic turbine from the speed. The results of modeling shown certify the reduction of energy efficiency of wind turbines during the accumulation of their energy at the pumped hydro storage station due to the presence of wind speed pulsations.