SYNTHESIS OF A POWER FACTOR CONTROL SYSTEM FOR PARALLEL OPERATION OF SYNCHRONOUS GENERATOR WITH A NETWORK

In the paper the synthesis of a controller based on fuzzy logic to stabilize the power factor through the control of excitation of a synchronous generator that operates in parallel with the network.To achieve the aim of the research a method for the synthesis of a graphic-analytical form of representation the procedure for converting information arguments in the functional structures of control systems objects as parts of autonomous electric power systems has been used.It made it possible to form a mathematical model of the power factor control system and to analyze the system by means of multilevel decomposition to get all the necessary information about the basic properties of its elements from the standpoint of a general systemic approach.In turn, the analysis of signal conversion processes at various levels of decomposition in the control system enabled to study its structural properties and draw a conclusion about the optimality of its structure.When designing a control system, methods of fuzzy logic theory have been used, which made it possible to consider to the fullest extent the phenomenon of interconnectedness and nonlinearity of processes in autonomous power stations.The model of the power station and simulation results of the regulator have been developed.On the basis of the performed modeling, a comparative analysis of the quality of power factor control using three types of controllers -a fuzzy controller, a three-position controller and a PID-controller has been carried out.It was found that the best indicators of the control quality are provided by the controller based on fuzzy logic.The use of the proposed control system makes it possible to increase the energy efficiency of the autonomous and ship electric power systems by implementing such a control strategy in which synchronous generators operate in optimal modes.