This chapter describes the modeling and stability analysis of turbine governing system of hydropower plant without and with surge tank, respectively. Under the assumptions of isolated operation and rigid water hammer, the linearized complete mathematical model for the hydroturbine governing system of hydropower plant without and with surge tank, which is used for analyzing the transient process and dynamic performance of the turbine governing system under load disturbance, is established. The stability of turbine governing system without and with surge tank is analyzed, which includes the criterion of stability, stable domain and the effects of influencing factors on stability. Finally, according to the homogeneous differential equation of turbine governing system, the analytical formula of critical stable sectional area is deduced.
Modeling and stability analysis of turbine governing system of hydropower plant, Page 1 of 2
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