Generator Excitation Controller

Abstract

Traditionally, the generator excitation systems were meant only to provide field current to the field winding of the synchronous generators. Hence initially, dc generator based excitation controllers were used. With the advent of fast acting semiconductor switches, static excitation systems were developed that were having very fast response time. With the development of static excitation systems, Automatic Volt- age Regulators (AVR) and Power System Stabilizers (PSS) were also developed to improve the transient stability and small signal stability respectively. The aim of this project is to design a generator excitation controller that have faster response and can improve the transient stability as well as small signal stability with reduced cost and increased robustness. Currently the AVR and PSS function separately and in many cases the hardware is also different. Hence the project aims at designing the controller that can perform the function of both the AVR and PSS. The different control strategies proposed by authors are compared and analyzed on Single Machine Infinite Bus and according to the excitation response of algorithms, the response of exciters are also obtained.