NDLI: Improving base case solution for on-line ATC calculations

Content Provider	IEEE Xplore Digital Library
Author	Su, C.L. Tsai, C.Y. Lu, C.N.
Copyright Year	2000
Description	Author affiliation: Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan (Su, C.L.)
Abstract	The base case for computing available transfer capability (ATC) may be from the real-time state estimation (SE) or a future postulated system condition. Many existing ATC calculations are using off-line planning models. A survey result shows that most transaction business will take place in the next hour. In a network with limited transmission margins, to accommodate the next-hour market, there exists a need for an accurate real-time network model that can be used in the on-line ATC calculations. Due to the data exchange activity in the interconnected network, measurements used in an on-line model estimation might occur, say, as much as 30 seconds or several minutes apart. This paper investigates the measurement time skew effects in the real-time ATC calculations. In order to reduce the time skew effect, three measurement treatment schemes including a linear extrapolation scheme, an exponential smoothing scheme and a dynamic state estimation (DSE) are proposed. Test results show that with proper measurement updates, SE can provide a more accurate real-time base case for security analysis and ATC calculations. Costly overdesign of communication system for interarea data exchange could be avoided by using the proposed methods.
Starting Page	27
Ending Page	31
File Size	487316
Page Count	5
File Format	PDF
ISBN	0780364201
DOI	10.1109/PESS.2000.867404
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-07-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Computer aided software engineering State estimation Time measurement Real time systems Extrapolation Smoothing methods Testing Communication system security Data security Power system protection
Content Type	Text
Resource Type	Article

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