NDLI: A voltage sag-based procedure for determining transient stability models of conventional loads

Content Provider	IEEE Xplore Digital Library
Author	Rylander, M. Grady, W.M. Arapostathis, A. Powers, E.
Copyright Year	2005
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA (Rylander, M.; Grady, W.M.; Arapostathis, A.; Powers, E.)
Abstract	Conventional linear load models for stability studies use an exponential relationship to represent active and reactive power consumed as a function of voltage. Typical composite loads are modeled as constant power, current, impedance, or a combination of the three. There is a need for better procedures to produce more exact composite load models for use in stability studies. This paper discusses a method for extracting composite load characteristics using disturbances created by transmission voltage sags. Voltage sags, which are particularly frequent during thunderstorms, present the opportunity to refine stability load models for power systems. Fault and pre-fault power flow data are decomposed into active and reactive components, and are then further examined to extract the nonlinear load component. With the nonlinear loads removed from the data, the voltage variation of the remaining linear load active and reactive powers can be observed and the best stability models determined. The entire procedure is illustrated using actual data for a distribution feeder in Austin, TX, and the results match well with commonly cited references.
Starting Page	321
Ending Page	324
File Size	620635
Page Count	4
File Format	PDF
ISBN	0780392590
DOI	10.1109/ESTS.2005.1524695
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-07-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Reactive power Voltage fluctuations Power system transients Power quality Power system stability Data mining Impedance Power system modeling Power system faults Load modeling
Content Type	Text
Resource Type	Article

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