Ergon Energy Corporation Limited Request For Information : Supply To Mackay Northern Beaches Area Emerging Distribution Network Constraint
Where the technical limits of a distribution system will be exceeded and the rectification options are likely to exceed $10M, Ergon Energy is required under the National Electricity Rules s5.6.2(f) to consult with affected Registered Participants, AEMO and Interested Parties within the time required for corrective action and meet certain requirements, including undertaking analysis that satisfies the AER’s Regulatory Test, in selection of an appropriate solution.
Ergon Energy is responsible (under its Distribution Authority) for electricity supply to the Mackay area in central Queensland. We have identified emerging limitations in the electricity distribution network supplying the Mackay northern beaches area. The loads on Ergon Energy’s zone substation and 11kV networks in the Mackay northern beaches area have progressively increased such that augmentation is required if reliable supply is to be maintained.
To meet the security of supply criteria for the Mackay northern beaches area Ergon Energy needs an additional minimum of 6MVA firm capacity at 11kV to be provided to this area. This size has been matched to expected load requirements within Ergon Energy’s typical 10 year planning horizon.
In order to ensure that supply to customers in the Mackay northern beaches area complies with Ergon Energy’s security of supply criteria, initial corrective action will be required to be completed prior to the summer of 2011/12. However it is not considered possible to deliver a network solution by that time, so a target deadline of November 2013 has been determined based on the ability to appropriately manage the risks associated with network contingencies. A decision about the selected option is required by June 2010 if any option involving significant construction is to be completed by November 2013.
Ergon Energy published a Request for Information relating to this emerging network constraint on 8 February 2010. No submissions were received by the closing date of 8 March 2010.
Four feasible solutions to the emerging network constraint have been identified:
- Option 1 - Build 8.5km Dual Circuit 66kV Overhead Line and Convert Planella Substation to 66/11kV with larger transformers in 2013
- Option 2 - Build 8.5km Dual Circuit 66kV Overhead Line Energised at 33kV and Augment Transformer Capacity at Planella Substation in 2013
- Option 3 - Build 9.0km Dual Circuit 66kV Underground Cable Line and Convert Planella Substation to 66/11kV with larger transformers in 2013
- Option 4 - Build 9.0km Dual Circuit 66kV Mixed Overhead and Underground Cable Line and Convert Planella Substation to 66/11kV with larger transformers in 2013
This is now a Consultation and Draft Recommendation where Ergon Energy provides both economic and technical information about possible solutions, and our recommended solution, being Option 1, to convert Planella Substation to 66/11kV by November 2013.
Submissions in writing (electronic preferably) are due by 29 April 2010 and should be lodged to:
Ergon Energy Corporation Limited
P O Box 15107
City East QLD 4002
Attention: Network Planning and Development
Email: Glenys.Davies@ergon.com.au
A decision about the selected option is required by June 2010 if any option involving significant construction is to be in place by November 2013.
Updated information will be provided on Ergon's web site: http://www.ergon.com.au/network_info/consultations/default.asp
For further information, please contact: Glenys Davies
Ph (07) 4931 2661
Email: Glenys.Davies@ergon.com.au
| Ergon Energy Corporation Limited Consultation & Draft Recommendation : Supply To Mackay Northern Beaches Area - Emerging Distribution Network Constraint 16 Apr 2010 | filename: 0179-0101.pdf |
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