• Increased South Island reserve offer prices May 2012

  Published: 09/12/2013 12:00am

  During May 2012, south flow on the HVDC link was at times constrained due to high reserve prices. Read More

• Reduced energy offers at Arapuni on 13, 14 and 16 April 2012

  Published: 09/12/2013 12:00am

  The system operator issued Grid Emergency notices on 13 and 16 April 2012 relating to low generation offers from Arapuni power station and consequently implemented a network reconfiguration at the Arapuni bus. Read More

• Locally net pivotal generation

  Published: 09/12/2013 12:00am

  This review started as an enquiry into the net pivotal status of Genesis Power Ltd at Tekapo A. Read More

• Analysis of Transpower reports relating to 13 December 2011 event

  Published: 09/12/2013 12:00am

  We're analysing technical information provided by Transpower relating to events of 13 December 2011. Read More

• Frequency keeping costs for trading period 31 on 13 December 2011

  Published: 09/12/2013 12:00am

  Two frequency keepers were cleared for trading period 31 on 13 December 2011. Read More

• Impact of reduced HVDC south constraint on South Island reserves

  Published: 09/12/2013 12:00am

  Low South Island hydro storage has increased reliance on North Island generation, increasing the amount of HVDC south flow. Read More

• Market impact assessment of Arapuni split

  Published: 09/12/2013 12:00am

  Transpower has implemented a permanent bus split at Arapuni to relieve transmission constraints in the upper North Island region, and reduce the need to constrain back generation from Arapuni. Read More

• Final pricing error identified by vSPD

  Published: 03/12/2013 12:00am

  On the morning of 11 December 2012 our vectorised scheduling pricing and dispatch (vSPD) model indicated final prices at Dargaville (DAR0111) were slightly higher than prices published by the pricing manager for two trading periods on 10 December 2012. Read More