SIMULATION STUDIES FOR THE DIGITAL EXCITATION CONTROL OF SYNCHRONOUS GENERATORS

Abstract

A synchronous machine AVR-CUM-STABILIZER digital excitation controller utilizing the recursive least-squres identification with varying forgetting factor and a self-searching pole-shifting self-tuning control stategy is described in this dissertation. The use of varying forgetting factor in the identification algorithm improves parameter tracking under both transient and dynamic conditions, and the use of a self-searching pole-shifting self- tuning control increases the flexibility when applied to varying operating conditions encountered in power systems. Simulation studies are performed with the proposed controller fi on a single machine infinite bus system. It is observed that better system response is achieved using the proposed controller" in comparison to conventional controller.