NDLI: A New Synchronous Generator Out-of-Step Relay Scheme Part II Complete Version

Content Provider	IEEE Xplore Digital Library
Author	Roemish, W.R. Wall, E.T.
Copyright Year	1963
Abstract	In the complete version of the proposed generator out-of-step relay scheme, the equations solved by the powerplant computer are based on a two-machine system model which provides for the, effects of circuit resistance, constant uniform damping, and varying internal voltage of the protected generator. Transient saliency and variable damping effects are neglected. Mechanical shaft power is considered to remain constant throughout the transient period of a disturbance. The Direct Method of Lyapunov is used to determine the stability boundary for the two-machine system. The Lyanunov V-function employed in scheme computations is Mansour's generalized V-function developed via the EMA (Energy Metric Algorithm). Tripping is initiated when the iteratively computed value of the generalized V-function during a system disturbance exceeds the iteratively computed value of b(t) or when it is determined that V>O. Nondelayed tripping prior to the time system torque angle reaches 180°is permitted provided the angle is favorable for breaker operation. If the angle is not favorable at the time instability is detected, tripping is delayed until the angle becomes favorable.
Starting Page	572
Ending Page	582
Page Count	11
File Size	1645750
File Format	PDF
ISSN	00189510
Volume Number	PAS-104
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1985-03-01
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Synchronous generators Relays Power system relaying Protective relaying Power generation Damping Equations Power system modeling Circuits Voltage
Content Type	Text
Resource Type	Article
Subject	Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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