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Slow down in rate of wind generation projects: NEM connected wind generation capacity less than 700MW

Posted by gmarkets on 3 September, 2007

Dominique La Fontaine, Chief Executive Officer, of lobby-group, Auswind said “Uncertainty surrounding the economic policy drivers, technical requirements, market dispatch and other power system security obligations has led to a slow down in the rate of wind generation projects being committed”. NEM wind generation less than 700MW: Despite significant effort by Auswind members, the current NEM connected wind generation capacity was less than 700MW. Wind farms were increasing in size. At the same time manufacturers were developing more sophisticated control functions allowing these wind farms to be operated remotely. This mode of operation was efficient and, with internet oversight, sometimes operational control was provided from outside of the country where the wind farm was located.

Control to alleviate congestion: It represented a modern model of operational control unlike conventional generation. In the interest of the integration of wind energy and power system security, Auswind supported the majority of this rule change. This method provided NEMMCO with the level of control necessary to alleviate the transmission congestion in accordance with transmission network constraints implemented in the NEM Dispatch Engine. The purpose of the rule changes, as specified by NEMMCO, was “to ensure that NEMMCO can continue to efficiently control network flows within secure operating limits where significant amounts of generation of an intermittent nature (such as wind farms) are likely to emerge in the NEM.”

30MW plus wind farms to semi-schedule: It should be noted that the vast majority of the 6000 plus network constraint equations related to networks of 100kV and above. The WETAG, the WEIRG and the TSRWG all worked on the principle that NEMMCO required the ability to limit the active power output via the constraints only when there was a binding network constraint, which would only normally occur in these higher voltage transmission networks. Discussion in those forums had mooted that the dispatch requirement could be on an as needs basis, that this should be assessed during the connection stage and identified as a requirement. This rule change went beyond such discussions and mandated the inclusion of all wind farms of 30MW or more into the semi-scheduling regardless of their position in the

Certainty for investment: To an extent this would provide certainty for investment, while still increasing the cost of connection in places without reason which was contrary to the NEM objective. Where the rules have gone beyond this agreed intention, concerns have been highlighted and requested that it be returned to the agreed intention. This submission has been prepared under the management of Kate Summers, Technical Director for Auswind and Chair Auswind Industry Regulation NEM committee. Please contact Kate for further information on (03) 9615 6442

Reference: Dominique La Fontaine, Chief Executive Officer, Auswind, Re: National Electricity Rules – Request for Rule: Semi-Dispatch of Significant Intermittent Generation, 10 July 2007,

Erisk Net, 29/8/2007


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