Research on Modeling Technology of Hydroelectric Unit Regulation System

Positioned in the primary equipment of a hydropower station, the hydraulic turbine transforms hydraulic energy into mechanical energy [40] then into electrical energy. Simulating and enhancing the HURS transition process and controller design thus depends on mathematical modeling of the hydraulic turbine. Complex nonlinear dynamic characteristics can be produced in the operation and condition conversion process of hydraulic turbines by means of hydraulic machinery coupling effect. Consequently, it is imperative to fully consider the flow and output torque characteristics of hydraulic turbines while investigating their nonlinear dynamic properties. Although academics both domestically and internationally have studied the exact modeling of hydraulic turbines, the flow rate and output torque of hydraulic engines cannot be precisely expressed at present using exact mathematical formulations. Practical engineering experiments have shown that simulation calculations utilizing the characteristic curves of the hydraulic turbine model may investigate the dynamic characteristics and transition process of the hydraulic turbine, and to a certain extent, the errors generated by the model can be neglected when the conversion rate of the operating conditions of the hydraulic turbine remains the same much and small disturbance analysis is conducted.