Modeling and control of a distributed generation system

This paper presents a new mathematical model for a standalone synchronous machine based distributed generation (DG) system, with the main aim of load voltage and machine speed control. The DG system consists of a standalone synchronous generator, connected to a controlled rectifier with a resistive load. For the mathematical model developed, a control scheme has been designed for maintaining desired voltage (at the load) and generator speed, in the presence of load variations and changing reference inputs. Results obtained both through the MATLAB programming and PSCAD/EMTDC simulation are presented to validate the derived model, and to demonstrate the better performance of the control scheme in maintaining load voltage and generator speed at the desired values.