Synthesis of an Automatic Control System for the Excitation System of a Three-stage Synchronous Generator

The article is devoted to solving the problem of synthesis of an automatic control system for the excitation unit of a three-stage synchronous generator operating as part of an on-board power supply system. In the starter operation mode, when the excitation unit operating in the configuration of a single-phase voltage source inverter, a single-loop control system with the resonant component and a PI-controller for the current of the excitation winding has been developed. In the generator operation mode, when the excitation unit operating as DC-DC Buck converter, a two-loop control system with PI and PID controllers with main generator output voltage controlling has been created. To calculate the parameters of the controllers, a calculation technique based on the time-scale separation method is considered. The efficiency of the designed system was evaluated on the basis of simulation modeling using the PowerSIM and Matlab/Simulink software for a generator supplying a three-phase AC network, with a 115 V/400 Hz voltage with power quality based on the requirements of GOST R 54073-2017.