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Power System Analysis by N. V. Ramana

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CHAPTER 8

Power System Steady—State Stability Analysis

8.1 Introduction

The stability of a system is broadly defined as the property of the system that enables it to remain in a state of equilibrium under normal operating conditions and to regain an acceptable state of equilibrium after being subjected to a disturbance.

Power system stability is a term applied to a. c. electrical power systems denoting a condition in which the various synchronous machines of a system working in parallel remain in synchronism or in step with each other.

8.2 Forms of Power System Stability

There are three forms of stability conditions that need to be considered for the purpose of analysis, as indicated in Table 8.1.

 

 

Table 8.1 Forms of Stability

8.2.1 Small ...

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