POWER SYSTEM TRANSIENT SIMULATION CONSIDERING DETAILED MODELS OF HYDRAULIC SYSTEM

Taking the Xiaolangdi hydropower station as research object, different forms of mathematical models of hydraulic systems for power system transient stability analysis including uneven single pipe rigid water-hammer model, elastic water-hammer model, elastic water-hammer model of two-unit conduit system which takes the hydraulic coupling between the units into account, and the linearized and nonlinear models of hydroturbine, are built up. Using the user’s define function provided by power system analysis software package (PSASP) the transient simulation of Henan power system is carried out and the influences of different hydraulic system models and hydraulic coupling on the power system transient stability are analyzed.