Journal ArticleDOI
Coordination of Load Conservation with Turbine-Generator Underfrequency Protection
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In this article, a comprehensive underfrequency protection program was developed for the Southern electric system in which digital computer simulations were used to optimize a system wide load shed program and to verify its coordination with a steam turbine-generator under-frequency protection scheme.Abstract:
A system disturbance or operating abnormality may leave a power system with a generation deficiency, which, if uncorrected, can result in an extensive power outage. The possibility of such disturbances has led to increased interest in the application of automatic underfrequency protection schemes to restore load/generation balance and to prevent equipment damage. This paper presents a comprehensive underfrequency protection program recently developed for the Southern electric system in which digital computer simulations were used to optimize a system- wide load shed program and to verify its coordination with a steam turbine-generator underfrequency protection scheme.read more
Citations
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Journal ArticleDOI
Adaptive underfrequency load shedding based on the magnitude of the disturbance estimation
TL;DR: In this article, a new approach to adaptive underfrequency load shedding (UFLS), a procedure for protecting electric power systems from dynamic instability and frequency collapse, is presented, which consists of two main stages.
Journal ArticleDOI
An adaptive method for setting underfrequency load shedding relays
P.M. Anderson,M. Mirheydar +1 more
TL;DR: In this paper, an adaptive scheme is proposed for determining the amount of load to be shed by underfrequency relays based on the observed initial slope of the frequency deviation following the system separation.
Journal ArticleDOI
Self-healing in power systems: an approach using islanding and rate of frequency decline-based load shedding
TL;DR: In this paper, the authors proposed a self-healing strategy to deal with catastrophic events when power system vulnerability analysis indicates that the system is approaching an extreme emergency state, and a load shedding scheme based on the rate of frequency decline is applied.
Proceedings ArticleDOI
Adaptive Underfrequency Load Shedding Based on the Magnitude of the Disturbance Estimation
TL;DR: In this paper, a new approach to adaptive underfrequency load shedding, a procedure for protecting electric power systems from dynamic instability and frequency collapse is presented, which consists of two main stages, in the first stage, the frequency and the rate of frequency change are estimated by the nonrecursive Newton type algorithm.
Journal ArticleDOI
Self-Healing in Power Systems: An Approach Using Islanding and Rate of Frequency Decline Based Load Shedding
Abstract: This paper provides a self-healing strategy to deal with catastrophic events when power system vulnerability analysis indicates that the system is approaching an extreme emergency state. The system is adaptively divided into smaller islands with consideration of quick restoration. Then an adaptive load shedding scheme based on the rate of frequency decline is applied. The proposed scheme is tested on a 179-bus, 20-generator sample system and shows very good performance.
References
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Journal ArticleDOI
Computer representation of excitation systems
TL;DR: This paper suggests a common nomenclature and control system representation of the various excitation systems now available that can be used to define input data requirements for computer programs, and can provide a consistent format in which manufacturers can respond to requests for excitation system data to be used for system studies.
Journal ArticleDOI
Long term dynamic response of power systems: An analysis of major disturbances
Journal ArticleDOI
Determination of frequency decay rates during periods of generation deficiency
M.S. Baldwin,H.S. Schenkel +1 more
TL;DR: In this article, a method of determining the maximum probable rates at which power system frequency will decay following a disturbance which results in an overload on the available generation is described, based on the maximum electrical load which a generator-transformer combination will accept as a function of the characteristics of the unit and the system to which it is connected and the initial operating conditions.
Off-frequency turbine-generator unit operation
R.E. Warner,T.L. Dillman,Baldwin +2 more
TL;DR: In this article, the design of steam turbines and the operation of turbogenerators are discussed and it is concluded that since generator components may over heat during off-frequency operation, power plant operators must use prudence when allowing turboglenerator frequencies to move away from the normal level.
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An adaptive method for setting underfrequency load shedding relays
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