Power disturbances are used to identify hydroelectric system models of hydropower plants

hydroelectric power stations;  hydraulic systems;  Model identification;  Model testing

Combined with the field test of a pumped storage power station, the measured data under power disturbance were used to identify the hydraulic system model of large units with complex water transmission system. The input signal of the identification method is obtained by adjusting the given power of the governor, which does not affect the normal test and operation of the unit. The augmented least squares method was used to calculate the identification, and the identification results were verified by three methods: prior knowledge test, step response test and residual white noise test. The results show that the obtained identification model is credible, and the method of identifying the hydropower system model by using power disturbance is feasible.