Abstract of Thesis presented at COPPE/UFRJ as a partial fulfillment of the requirements for the degree of Master of Science (M.Sc.)

Control of an Aeroderivative Gas Turbine Applied to Ship Propulsion

Kleberson Meireles de Lima

April/2014

Advisor:

Ramon Romankevicius Costa

Department:

Eletrical Engineering

      This work presents the speed control problem of a gas turbine applied to ship propulsion. Initially, the turbine major components are presented and the some types of modelling. Each presented model is most suitable to a specific application, since power generation to plane propulsion. Then, the main control strategies for gas turbines are discussed, in particular, the PID controllers and direct and indirect adaptive schemes. Afterwards, a control problem is stated: the PID controller cannot cope with the specifications for this problem. Thus, a more elaborated controller is required. Thereafter two different kinds of controller are proposed: a PI and an adaptive PI. The PI is designed through an optimization process, it is used a simulation similar to bed tests condition. Since the adaptive PI is designed using model reference adaptive systems and Lyapunov theory is used to determine the adaptation law. Finally a performance comparison is made with both controllers. The contribution of this work is present a control strategy applied to gas turbine speed control which combine ease and versatility of PID controllers with benefits of adaptive control techniques.