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Protective Relaying, 4th Edition by Thomas J. Domin, J. Lewis Blackburn

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Chapter 14

Stability, Reclosing, Load Shedding, and Trip Circuit Design

14.1 Introduction

The emphasis in the preceding chapters has been directed toward the protection of the various components of the power system. In this chapter, we examine the operation of the power system as a whole or unit, how the protection is effected, and how relaying can be applied or modified to minimize system disturbances.

The normal operation of generating, transmitting, distributing, and using ac electric power is of little concern to the protection systems as long as the load current does not exceed the specified maximums. Regulating relays and equipment are involved, but these are beyond the scope of this book. However, faults, system abnormalities, sudden ...

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