Impact of hydro-turbine and governor parameters on stability of grid connected power system

Abstract

Hydro-turbine and governor parameters affect power system stability. It is essential to identify the parameters of the hydraulic system, turbine, and governor to improve the powersystem stability. In this study, we carry out the identification of parameters using popular linear analysis techniques using SIMPOW software. The grid-connected power system Tala Hydropower Station is considered for the study. We identify how the parameters of the hydraulic system, turbine, and governor affect the power-system stability. The governor parameters such as permanent droop, temporary droop, filter time constant and servo time constant affect the stability of the grid-connected system. The parameters of the hydraulic system are surge impedance, friction factor of penstock, penstock elastic time constant, partial derivative of flow with respect to head, partial derivative of mechanical torque with respect to head, partial derivative of mechanical torque with respect to gate opening and partial derivative of flow with respect to gate opening affect the grid connected system.