This dissertation is concerned with the improvement of the transient response of turbo-generator sets following a severe system disturbance. The improvement in response is obtained by the application of a single additional system state into the relevant controllers. The system state used is that of rotor acceleration. Theoretical studies are carried out to obtain the feedback gains required for single machine co-ordinate control of excitation and governing. The study is then extended to a multi-machine system. The control laws obtained from the theoretical studies are applied in the laboratory to micromachine systems. A method of obtaining a rotor acceleration feedback control signal is developed and applied to these laboratory micromachine systems. The acceleration transducer forms an essential part of a dedicated microprocessor data acquisition system, which, apart from the functions of data collection and processing, performs a real time simulation of the governor turbine model. The output of this simulation is then used to control the micro-machine prime mover torque. An essential feature of the microprocessor system is the determination of control laws for both the governing and excitations systems during transient conditions.
|Date of Award||1982|