Development of advanced SWER models for the Ergon Energy network

Nobbs, Rebecca (2012) Development of advanced SWER models for the Ergon Energy network. [USQ Project]

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Abstract

Ergon Energy has over 65 000 km of Single Wire Earth Return (SWER) networks operating within rural and remote localities of Queensland, Australia. SWER networks provide a cost effective limited electricity supply to farms and small towns throughout rural Queensland. Like the rest of the state, consumer demand for power and energy on these SWER networks is growing and this is placing increasing constraints on the operating limits of these networks. The need to be able to accurately identify and model issues, and to simulate possible solutions is stronger than ever.

Ergon Energy’s current modelling package, DINIS, is no longer supported by the developer, and has limitations with regard to the technical modelling of SWER networks. The primary objective of this project is to create a standard set of SWER models using other modelling packages, MATLAB and PSCAD, preferred by Ergon. Configurations under investigation include isolated, unisolated, duplexed and triplexed SWER systems. The secondary objective was to provide a recommendation as to features that are desirable in a SWER modelling software package, to inform future program selection.

A literature review was conducted, which details the basic operating principles behind the construction and operational aspects of SWER networks. Also covered in the review was transmission line and load flow modelling theory.

The project methodology included construction of the SWER models in the MATLAB SimPowerSystems and PSCAD software environments. Once the operation of simple models had been verified, complex real-world systems were simulated in MATLAB. This allowed for SWER model verification by comparing to existing modelling techniques and metered data.

Initial analysis of the performance of the modelling packages concluded that MATLAB SimPowerSystems is the preferred modelling system. The developed models perform well for line segments up to a length of approximately 50 km. Finally, recommendations have been made in order to improve the accuracy and performance of the models.


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Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering
Supervisors: Ahfock, Tony; Turner, Jon
Date Deposited: 27 Feb 2013 01:53
Last Modified: 21 Feb 2014 12:20
Uncontrolled Keywords: ergon energy network; swer networks; matlab
Fields of Research : 09 Engineering > 0906 Electrical and Electronic Engineering > 090607 Power and Energy Systems Engineering (excl. Renewable Power)
URI: http://eprints.usq.edu.au/id/eprint/23101

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