Research on nozzle synchronous control system in a pelton turbine based on MRAC

To keep pelton turbine running stably, it´s important to ensure that the flow of each nozzle is the same. In order to keep the elctro-hydraulic servo nozzle system of pelton turbine synchronous, adjustable gain based on the gradient method of model reference adaptive control and coupling compensation are used. Discrete transfer function and difference equation of the controlled object are obtained after linear system model is established. As coupling compensation is applied to the system, system performance is improved. In addition, Model Reference Adaptive Control is applied to the system and it can get better control result. The experiment result indicates that the control strategy can efficiently reduce the synchronous error and improve the synchronization precision.