Publication: Risk of transient stability using rotor trajectory index as severity function
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Date
2017
Authors
Elghali E.B.
Marsadek M.
Ramasamy A.K.
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Advanced Engineering and Science
Abstract
This paper presents a new approach to determine the risk of transient stability. It describes the implementation of rotor trajectory index (RTI) to assess the severity of power systems when it is subjected to a three-phase fault. The (RTI) is proposed as an index used to represent severity of transient instability. Risk of transient stability for three-phase fault is calculated using a well-known risk formula. Risk of transient stability provides a quantitative measure to evaluate the potential loss of synchronism of a generator that takes into account the probability and consequences. RTI index is calculated based on the machines rotor angles obtained at each step of a time domain simulation. RTI is proposed as an index to show the severity of the three-phase fault towards transient stability since it allows a fast and accurate measurement of the degree of stability of the system facing a fault. The proposed technique is implemented on the IEEE 39-bus system. � 2017 Institute of Advanced Engineering and Science. All rights reserved.