SRAT-distribution voltage sags and reliability assessment tool

Koner, Prabhat K. & Ledwich, Gerard F. (2004) SRAT-distribution voltage sags and reliability assessment tool. IEEE Transactions on Power Delivery, 19(2), pp. 738-744.

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Interruptions to supply and sags of distribution system voltage are the main aspects causing customer complaints. There is a need for analysis of supply reliability and voltage sag to relate system performance with network structure and equipment design parameters. This analysis can also give prediction of voltage dips, as well as relating traditional reliability and momentary outage measures to the properties of protection systems and to network impedances. Existing reliability analysis software often requires substantial training, lacks automated facilities, and suffers from data availability. Thus it requires time-consuming manual intervention for the study of large networks. A user-friendly sag and reliability assessment tool (SRAT) has been developed based on existing impedance data, protection characteristics, and a model of failure probability. The new features included in SRAT are a) efficient reliability and sag assessments for a radial network with limited loops, b) reliability evaluation associated with realistic protection and restoration schemes, c) inclusion of momentary outages in the same model as permanent outage evaluation, d) evaluation of the sag transfer through meshed subtransmission network, and e) simplified probability distribution model determined from available faults records. Examples of the application of the tools to an Australian distribution network are used to illustrate the application of this model.

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ID Code: 10216
Item Type: Journal Article
Refereed: Yes
Keywords: distribution networks, object, oriented programming, power engineering computing, power supply quality, power system dynamic stability, power system reliability
DOI: 10.1109/TPWRD.2003.822966
ISSN: 0885-8977
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2004 IEEE
Copyright Statement: Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Deposited On: 17 Oct 2007 00:00
Last Modified: 29 Feb 2012 13:09

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