Clutha and Upper Waitaki Lines Project Operational Information

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The system operator will use this webpage to publish updates or information related to the Clutha Upper Waitaki Lines Project (CUWLP).

Outage Information

Transpower, as grid owner, has notified outages of the following circuits for the project:

  • CML_TWZ_2 circuit, and CYD_CML_TWZ_1 and 2 circuits for thermal upgrades POCP link
  • NSY_ROX_1 and LIV_NSY_1 circuits POCP link

These outages can be viewed on POCP.  Any changes to these outages will be communicated via POCP and the usual notification processes.

Industry Briefings and Presentations

Industry briefing 16 September 2020 presentation [ pdf 1.03 MB ] link.

Recent Updates

15 September 2020

  • The grid owner has updated outages for the reconductoring of Roxburgh to Livingstone as part of CUWLP. Full details of these outages are available through POCP. Update on outages for Clutha and Upper Waitaki [ pdf 189.73 KB ] link.

9 September 2020

Customer Advice Notices (CANs)

Date Title
15/09/2020 CAN Update on outages for Clutha and Upper Waitaki [ pdf 189.73 KB ]
09/09/2020 CAN Industry Briefing on Clutha Upper Waitaki Lines Project [ pdf 271.76 KB ]
28/08/2020 CAN Power Flow Limits - Clutha Upper Waitaki Lines Project (CUWLP) [ pdf 177.68 KB ]
18/08/2020 CAN Asset Capability - Clutha Upper Waitaki Lines Project (CUWLP) [  264.1 KB ]
12/08/2020 CAN Clutha Upper Waitaki Lines Project (CUWLP) Outages [  360.77 KB ]
06/08/2020 CAN Clutha Upper Waitaki Lines Project (CUWLP) Timing Update [  258.65 KB ]
28/07/2020 CAN Outages for Clutha and Upper Waitaki Lines Project enabling works [  177.09 KB ]
23/07/2020 CAN Clutha Upper Waitaki Lines Project Timing Under Review [  178.73 KB ]

Analysis

The system operator has completed analysis of the power flow limits during the Clutha Upper Waitaki Lines Project (CUWLP). This identifies the approximate transfer limits and indicative constraints that will apply during the various stages of the Project. The system operator will advise what the transfer limits and indicative generation constraints will be at the completion of the duplexing in due course. Power Flow Limits - Clutha Upper Waitaki Lines Project (CUWLP) [ pdf 113 KB ] link.

Questions and Answers

We have listed below common questions we have received from industry along with our responses.  We will continue to update this section and share with participants any updates.

Number Description
1

What is meant by enabling works and will this result in any rating changes?

Grid Owner Response 12 August 2020

The enabling works are a thermal upgrade of the Cromwell-Twizel section of the Roxburgh-Twizel line. At the completion of these outages there will be some additional capacity on these lines.  Confirmation of these new ratings will be provided in due course.

2

Will the thermal upgrade work on Cromwell-Twizel be completed prior to the outages for the reconductoring work on the Naseby-Roxburgh circuit in January 2021?

Grid Owner Response 19 August 2020

Yes, we are planning to complete all thermal upgrade work on the Cromwell-Twizel circuits prior to this Naseby-Roxburgh outage. The planned uprated capacity of these CML-TWZ circuits is detailed in the CAN issued 18th August.

Links to Additional Information

Clutha Upper Waitaki Lines Project page

NZGB website

POCP database

Videos that explain how to perform POCP searches and receive notifications of outage changes are available on our Transpower YouTube channel, under the playlist Planned Outage Co-ordination Process