Index

• Introduction
• Initial SOO
• Draft GPAs, 2006 - 2008
• 2008 SOO
  

Introduction

The grid planning assumptions (GPAs) are a set of information, published by the Commission, for use in the Commission's Statement of Opportunities (SOO). The information includes:

• committed projects for additional generation, transmission and demand-side management;
• a reasonable range of credible demand forecasts by region or grid exit point (i.e. high, medium, and low); and
• a reasonable range of credible future, high-level generation scenarios.

Initial SOO

The first set of grid planning assumptions prepared by the Commission was published in the 2005 SOO.

Draft GPAs, 2006 - 2008

In September 2006, the Commission developed draft GPAs as an initial step in preparing a 2007 SOO. This included the preparation and publication of demand forecasts and four generation scenarios for consultation with interested parties.

In May 2007, the Commission decided to delay the publication of the next SOO until the New Zealand Energy Strategy was finalised. However, the Commission confirmed and published the draft demand forecasts and generation scenarios that were developed and consulted on in September 2006.

Following finalisation of the New Zealand Energy Strategy and receipt of additional information from Transpower, the Commission revised the generation scenarios and other key inputs to the draft GPAs that were released in May 2007 and recommenced work on preparing a 2008 SOO.

The Commission published the draft 2008 GPAs for consultation in February 2008.

As part of its process to seek feedback from participants about the development of the GPAs, the Commission held a workshop on 29 February 2008 in Wellington. The workshop was both of a general and a technical nature and provided stakeholders with an opportunity to hear directly from Commission staff and to ask questions about various aspects of the GPAs.

• Agenda pdf [31 KB]
• Introduction pdf [62 KB]
• Demand forecasting pdf [210 KB]
• Draft 2008 SOO  generation scenarios pdf [138 KB]
• Electric vehicles demand forecast pdf [611 KB]
• Inter-regional transmission capacity analysis pdf [73 KB]

Comments on the draft 2008 GPAs were sought by 5 pm on Thursday 13 March 2008.

• Submissions received

The Commission has prepared a summary of the submissions received and its response.

• Summary of submissions pdf [229 KB]
  

Following consultation, the Commission refined its generation scenarios for inclusion in the draft SOO.

• Draft 2008 Demand Forecasts
• Draft 2008 Generation Scenarios
  

The Commission published the draft 2008 SOO for consultation on 4 July 2008.

The Commission held an industry workshop in Wellington on Monday 21 July 2008 to set out the key results of the work, describe the content and processes used and provide a forum for discussion to assist participants in their submission process.

2008 SOO

The Commission published the 2008 Statement of Opportunities on 29 August 2008. It incorporates demand forecasts and generation scenarios.

Supplementary material related to the forecasts and scenarios is referenced within the SOO document, or can be supplied by the Commission upon request.

Note: Rule 9.3 of section III of part F of the Electricity Governance Rules (Rules) provides that no liability will attach to the Board, Transpower or any other person for the accuracy of the grid planning assumptions set out in the statements of opportunities.