Academic Writing

The main objective of an automatic voltage regulator (AVR) is the accurate control and regulation of the terminal voltage and the reactive power flow of a synchronous machine. In order to fulfill these requirements, the field voltage must react quickly to changes of the operating conditions, i.e. with a response time that does not exceed a few milliseconds. To accomplish this, a high-speed controller is required. It continuously compares the actual values with the set point values and changes the final control element (firing angle for the converter) with an insignificant delay. The main control device calculates the controlled variable from the measured values in very short time intervals. The result is a quasi-continuous behavior with a negligible time delay. In recent years, the scale of power systems has been expanding, and with that expansion smooth power operation is becoming increasingly important. One of the solutions is to realize a practical high speed, highly reliable exciter system that is suitable for stable operation of a power system. In this work, a model of a static excitation system of an alternator connected to a network via a transformer have been built using MATLAB-SIMULINK