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Chapter: Flexible Alternating Current Transmission System - Co-Ordination of FACTS Controllers

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Co-Ordination of FACTS Controllers

Flexible ac transmission system (FACTS) controllers either extend the powertransfer capability of existing transmission corridors or enhance the stability and security margins for given power-transmission limits.

CO-ORDINATION OF FACTS CONTROLLERS

 

Introduction

 

Ø   Flexible ac transmission system (FACTS) controllers either extend the powertransfer capability of existing transmission corridors or enhance the stability and security margins for given power-transmission limits. Fast controls associated with FACTS controllers do provide these system improvements, but they also can interact adversely with one another. In an interconnected power system, when the controller parameters of a dynamic device are tuned to obtain the best performance, the remaining power system is generally assumed to be passive or represented by slowly varying elements. This assumption is strictly not true; hence the adjusted parameters may not prove optimal when the dynamics of the various other controllers are, in effect, found in real systems


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