A simple fuzzy excitation control system for synchronous generator

The power system is a dynamic system and it is constantly being subjected to disturbances. It is important that these disturbances do not drive the system to unstable conditions. From the power system point of view, the excitation system of synchronous generator must contribute for the effective voltage control and enhancement of the system stability. The requirement for electric power stability is increasing along with the popularity of electric products. At present, power system can be simulated and analyzed based on a mathematical model; however, uncertainty still exists due to noise, lightning and change of loads and an occurrence of fault. Recently, fuzzy theory has been applied for a number of studies on power system. Being highly flexible easily operated and revised, theory is a better choice, especially for a complicated system with many variables. Hence, this work aims to develop a controller based on fuzzy logic to simulate an automatic voltage regulator in transient stability power system analysis. By adding power system stabilizer, it will suppress and damp the oscillation when the generator is subjected to disturbances. The performance of Fuzzy Logic power system stabilizer is evaluated on a single machine to infinite bus power system under different operating conditions and disturbances to demonstrate its effectiveness. In this paper, a systematic approach to fuzzy logic control design is proposed.