Dvorak V. Improving of the system control of a.c. generators of the autonomous ship electric station

The dissertation is devoted to investigation of the parallel work of a.c. generators of the ship electric power station. Besides, the dissertation is devoted to investigation of new methods and algorithms allowing to ensure the invariability of dynamic characteristics of the transitional process of the frequency and magnitude voltage alteration of the ship elec-tric power station. A new mathematical model of ship electric power station with diesel generators and shaft generators was developed. The model joins working parallel a.c. generators and their diesel engines. Numerical evaluation of the change of transfer factors and time constants of the mathematical model depending on destabilizing exploitation factors were obtained. The sliding mode control with fuzzy logic regulators were developed for the excitation circuit of the a.c. generator and the system of diesel engine speed regulation. The devel-oped regulators ensure the invariability of transfer factors and time constants of the transi-tional processes of the current frequency and voltage alteration of the ship electric power station in large changes of destabilizing exploitation factors. The possibility of parallel work of the shaft generator with the diesel generators by using the developed regulators was proved. Validity and reliability of the thesises and conclusions given in the work are con-firmed by accordance of the theoretical results and experimental data.