Digital Excitation System for Synchronous Generator

Abstract

Automatic voltage controllers for synchronous generators have traditionally utilized analog electronics. Modern voltage control systems are beginning to utilize the power, flexibility, and cost advantages of Digital Signal Processor for control. Digital excitation systems is a DSP based controlled devices. Digital excitation systems play a significant role in providing fast and accurate voltage control to the power system. In order to maintain system stability in interconnected system network it is necessary to have fast acting excitation system for large synchronous machines which means the field current must be adjusted extremely fast to the changing operational conditions. This paper deals with the design and simulation of a Digital excitation system for Synchronous generator excitation systems to improve the steady-state and transient stabilities. The performance of the proposed system is examined for voltage control application of synchronous Generator through simulation studies using the Psim software package.