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Invitation to Comment: National Market for Instantaneous Reserves (NMIR) Refinement

NMIR was implemented to take advantage of the new HVDC controls that enabled reserve response from one island to cover AC events in the other island. These changes reduced the amount of reserves required to maintain system security, releasing more generation from the reserve market to the energy market, creating market benefits.

April 2020

The Regional Coincident Peak Demand (RCPD) information on this page relates to the April 2020 pricing year and has been assessed over the related capacity measurement period (CMP) - 1 September 2018 to 31 August 2019. The peak periods were determined following the application of adjustments allowed under the Transmission Pricing Methodology (TPM) including Exceptional Operating Circumstances (EOCs), and notional embedding/prudent discount agreements to reconciled metering data related to customer/connection locations subject to interconnection transmission charges.

Potential Household Solar Generation

All about solar

Have you ever wondered what the impacts on the power system are if everyone put solar panels on their roof? Here at Transpower, so have we.

We need to understand what electricty flows into and out of a region might be at different times of the day and therefore what changes we might need to make to the Grid to enable new technologies such as PV to be widely used.

Operational Review 2

Latest update: January 2018

In June 2017, we released an Invitation to Comment on a possible Operational Review 2 of the Transmission Pricing Methodology (TPM). This was following the Electricity Authority announcement that it needed to prepare a new cost-benefit analysis before any decisions could be made about its review into the TPM Guidelines.

NMIR Project Deployment Supporting Information and Resources

National Market for Instantaneous Reserves - Background

On 20th October 2016 Transpower deployed the National Market for Instantaneous Reserves (NMIR) project, a joint initiative between Transpower and the Electricity Authority.

The project was part of the Reserves and Frequency Management Programme and introduced changes required to create a national market for reserves by allowing reserves to be procured in one island to cover generation risk in the other.