POWER SYSTEM DYNAMICS AND STABILITY

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IPOWERSYSTEMDYNAMICSANDSTABILITYPeter W. Sauerand M. A. PaiDepartment of Electricaland ComputerEngineeringTheUniversity of Illinoisat Urbana-Champaign1406W. ,IL 61801iiCopyrightc 1997(updated2006), theproperty of andis notto be sold,reproduced,or . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interest. . . . . . . . . . . . . . . . . . .62.

INTRODUCTION 1.1 Background Power systems have evolved from the original central generating station con-cept to a modern highly interconnected system with improved technologies a ecting each part of the system separately. The techniques for analysis of power systems have been a ected most drastically by the maturity of digi-tal computing.

  Introduction, Power, Digi, D igital