Analise e otimização da operação de usinas hidreletricas

AUTOR(ES)
DATA DE PUBLICAÇÃO

1994

RESUMO

The directions to simulate the operation of a Hydroelectric Power Plants (Reversible) in a real time by a mathematics model, in that, all the operational conditions of the system components (ENOS) are described, are presented in this research. Steady, transient and oscilatory in a extensive period simulations allow to evaluate the adequate configuration to design a Pumped Storage Scheme, including the regulator parameters and the several common maneuvers, such as, total or partial load acceptance/rejection, with one or more hydraulic machines. The regulator can be a adaptive one, and the computational procedure developed allow to define the optimum control to any load demand, by setting the machine speed for the best efficiency point. The use of a Programable Logical Controllers (PLC) connected to the actuator system provides the adaptive operational control in a real time. The structured process for the description of the hydraulic network topology make easy the application of proposed method, applying the Method of Caracteristics(MOC), to simulate Power Plant operation. As showed the representation of the hydraulic machine characteristics by using Fourier Series, allowing interpolations to any operational conditions, which are definided in a Suter Plane. The PID regulator, with adaptive control, can adjust to any operational condition and provide the optimum solution for the rotate set, using cyclo con verter system, as recently used in a Reversible Power Storage Schemes. The determination of the system natural or vibration modes, done in a time domain, shows unmistakable advantages providing to analyse oscillatory flow from inner disturbance that self excitates the system. The guidelines here proposed are validated by illustratives computer simulations, in which stands out the advantages for modeling mathematically a general hydroelectric system with all elements (ENOS) dynamically represented in a real time

ASSUNTO(S)

otimização matematica usinas hidreletricas

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