North Taranaki Regional Supply Project

Region Map
Electricity consumers
46,640
in Northern Taranaki
Number of options being considered
5
to keep Northern Taranaki secure

We need to continually operate, maintain and develop New Zealand's transmission network - the National Grid - to ensure we meet the ongoing electricity needs of New Zealanders.

We have several projects planned or underway in the Taranaki region to improve supply there.  These include:

  • decommissioning and removing our equipment from the existing New Plymouth substation (at Port Taranaki);
  • constructing new 33 kV indoor switchgear at Carrington Street substation, enabling the connection of new 33 kV underground cables (owned by Powerco and connecting to their Moturoa zone substation);
  • installing a new 220 kV/110 kV interconnecting transformer at Stratford substation and converting the existing 220 kV New Plymouth to Stratford transmission line to 110 kV operation.

The work to decommission and remove our equipment from the New Plymouth substation will initially see a temporary connection of our two lines just outside the Port.  Longer term we will be seeking a permanent location for that connection and we have begun to consult with the community on that.

 

 

Why we're doing it

The New Plymouth substation connects the Taranaki regional 110 kV network to the national grid via one 220/110 kV interconnecting transformer which provides approximately half of the supply to the Taranaki area.  We are vacating this site as it is now required by Port Taranaki for its own purposes, and we have (together with Powerco) determined a suitable option (underground cabling from our Carrington Street substation to Powerco’s Moturoa zone substation) to ensure supply is not at risk for consumers.  Connecting the two lines servicing the Port together helps provide needed support to the one substation (Carrington St) that will be left supplying New Plymouth.

More information about the project

Information (including information from public submissions) about potential constraints and opportunities associated with the 5 potential routes/locations for the permanent line connection has been evaluated. The preliminary finding is that Option 2 is favoured. Further work is underway to refine some of the information, and a final recommendation will be made to Transpower management in late February for approval.  A summary of submissions document is now available below.

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