Transpower began consulting on the need for an HVDC replacement in May 2007. The table below summarises the key activities in the IWP.
|Submission period||Transpower publishes proposed HVDC options, methodologies and assumptions information papers||IWP||
22 May - 22 June 2007
|Options Workshop||Review of Transpower’s approach, methodology and HVDC options||IWP||
8 June 2007
|Part F Timetable and Consultation Process||Transpower's workshop on proposed Part F process and timings. Requests submissions||IWP||
1 August 2007
Part F Timetable
The Part F consultation commencing in September 2007, followed conclusion of the IWP and reflects the requirements Transpower must meet for an economic investment under Part F of the Electricity Governance Rules. The table below identifies the key activities.
During this time, Transpower stood down the existing Pole 1 of the HVDC.
Part F Timetable
|HVDC Databook||Transpower publishes HVDC Databook – alternatives, methodologies and assumptions to use in GIT analysis||
28 September 2007
|Briefing session||Transpower to update stakeholders on Options Ranking, Generation expansion modelling and timeline for consultation on Transpower's application of GIT||25 October|
|Consultation & Submission period||Transpower publishes and consults on its application of the GIT|
|Consultation forums||Transpower holds consultation forums|
|Investment Proposal||Transpower submits HVDC Investment Proposal to the Electricity Commission as part of a Grid Upgrade Plan||May 2008|
In August 2007, in order to facilitate a timely consideration and submission of any proposal, Transpower divided the project into two workstreams to run concurrently:
- HVDC Pole 1 retirement workstream
- HVDC Pole 1 replacement workstream