Wide area protection using synchrophasors

Saunders, Danielle (2017) Wide area protection using synchrophasors. [USQ Project]

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This dissertation analyses the feasibility of incorporating a wide area protection scheme using synchrophasors into the Queensland transmission network and provides a design recommendation for their integration. Synchrophasors or synchronised phasors enable continuous and close monitoring of the network to provide risk mitigation and enhanced security. The Queensland transmission system can become unstable in as little as 200ms, which is too fast for human management and can lead to widespread blackouts. The real time monitoring provided by synchrophasors enables an instantaneous response during periods of instability to mitigate the risk of network overloads. The synchrophasor scheme proposed within this dissertation is evaluated against an alternate solution currently implemented in North Queensland to monitor and manage the network. This research project aims to evaluate if synchrophasor technology can assist in a more robust grid design and promote network reliability when paired with traditional System Integrity Protection Schemes (SIPS).

A literature review forms part of this dissertation and highlights the need for wide area protection schemes in North Queensland. As one of the highest-producing regions of solar power in the world, North Queensland regularly shifts large loads across the network to supplement the inconsistency caused by solar power generation. This load shifting causes instability in the network. The research identified different design options that could be integrated into the existing North Queensland transmission system to increase visibility of the network’s function. The design process considered the current protection and communication systems installed and the geographical locations involved to determine the most cost effective solution. A number of scenarios were compared utilising a combination of standalone or integrated Phasor Measurement Units (PMUs) and Phasor Data Concentrators (PDCs). Ultimately, the design proposed herein meets the synchrophasor standards and objectives addressed within the literature review.

This research informed a design for a synchrophasor based SIPS that will monitor and detect the loss of parallel circuits and overloaded transmission feeders. The design was compared to the solution currently implemented in North Queensland and a simplified version of the design was tested and evaluated against the requirements of the North Queensland power grid. At the conclusion of the project, the synchrophasor based scheme is recommended for implementation into the Queensland transmission system once testing proves it meets the network requirements at a lower equipment cost than the current solution.

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Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of Engineering (Honours)(Electrical and Electronic Engineering)
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 - 31 Dec 2021)
Supervisors: Hills, Catherine
Date Deposited: 10 Sep 2021 05:34
Last Modified: 24 Mar 2022 06:08
URI: https://sear.unisq.edu.au/id/eprint/40811

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