| Title | Date | Description |
Whirinaki Dispatch [173kB]
|
Jul 2010 |
Query on why Whirinaki (WHI) station was dispatched on 15 June 2010.(additional report) |
Whirinaki Dispatch [116kB]
|
Jul 2010 |
Query on why Whirinaki (WHI) station was dispatched on 9 June 2010. |
Whirinaki Dispatch [206kB]
|
Jun 2010 |
Query on why Whirinaki (WHI) station was dispatched on 15 June 2010. |
Multiple Frequency Keepers Project Report [353kB]
|
Apr 2010 |
Details a strawman approach for implementing AGC with details of the proposed interface to generators and the HVDC. |
Whirinaki Dispatch [180kB]
|
Mar 2010 |
Query on why Whirinaki (WHI) station was dispatched on 18 February 2010. |
Real Time Pricing Issues [68kB]
|
Nov 2009 |
On 12 November 2009, Real-Time Prices (5 minutes prices) were incorrectly published to the market. This report explains how this occurred, the steps taken to resolve the issue and the action undertaken to minimise the likelihood of recurrence. |
Whirinaki Dispatch [50kB]
|
Oct 2009 |
Query on why Whirinaki (WHI) station was dispatched on 10 September 2009. |
South Island Frequency Event [278kB]
|
Sep 2009 |
A summary report on the South Island frequency event that occured on 1 August 09. |
Huntly Unit 5 Commissioning [122kB]
|
Nov 2007 |
Learnings from the Huntly Unit 5 commissioning (2007). |
North Island Frequency Excursion [45kB]
|
May 2007 |
A summary report on the North Island frequency excursion that occurred on 29 April 07. |
Benmore Tripping Event 30 Mar 07 [86kB]
|
Apr 2007 |
Initial investigation report for the 30 March 2007 tripping at Benmore Power Station and the HVDC Pole 1 that resulted in the loss of 326 MW from the South Island power system. |
Otahuhu and Huntly Tripping Event [214kB]
|
Dec 2006 |
Summary of events on 1st December 2006 when restoring the power system after the tripping of the Otahuhu CCGT coincided with a further loss of generation at Huntly, resulting in a Grid Emergency |
Huntly Unit 5 Commissioning Information Overview Document [103kB]
|
Nov 2006 |
This paper provides an overview of the changes required to the System Operator’s scheduling and dispatch process to enable the commissioning of the new unit 5 generating unit at Huntly |
Wellington Voltage Stability Study During HVDC South Transfer [226kB]
|
Sep 2006 |
Report to determine the system limits for power flow from Bunnythorpe to Haywards while HVDC is in south transfer for the Wellington |
Summary of South Transfer Limits post May 2006 [186kB]
|
Sep 2006 |
This presentation is to explain the transmission limits for future dry year events and comment on SI reserves interaction with HVDC dispatch |
Review of 19th June Generation Shortfall [92kB]
|
July 2006 |
Report to determine what factors contributed to the shortfall and the changes in availability of generation on the 19th June and the previous day |
Initial Report on 19th June Generation Shortfall [902kB]
|
June 2006 |
Report for the Minister of Energy into the Operation of the New Zealand Electricity Power System on Monday 19th June 2006 |
System Operator Constraint Audit [191kB]
|
April 2006 |
Review of the Process for Design, Development, Testing, Application, Real-Time Use, and Removal of Security Constraints |
System Operator Constraint Audit Recommendations & Actions [66kB]
|
April 2006 |
Recommendations and Actions from the Review of the Process for Design, Development, Testing, Application, Real-Time Use, and Removal of Security Constraints |
Otahuhu 220 kV Fault [41kB]
|
Feb 2006 |
Report of system event at Otahuhu Substation on 15th February 2006 at 09:34 hrs |
NI Frequency Excursion Report [39kB]
|
Jan 2006 |
Report on frequency excursion on 11 Dec 2005 |
SI Frequency Excursion Report [24kB]
|
Dec 2005 |
Report on frequency excursion on 04 Dec 2005 |
HVDC Pole 1 Unplanned Outage [36kB]
|
Mar 2004 |
|