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Conforming and non-conforming GXPs

The Electricity Authority may determine if a grid exit point (GXP) is conforming or non-conforming by following the process that is set out in clauses 13.27A to 13.27K of the Electricity Industry Participation Code 2010 (Code).

Usually a grid exit point that has a predictable demand pattern is considered to be a 'conforming' GXP while a GXP that does not follow a predictable pattern is considered to be a 'non-conforming' GXP. From 28 June 2012, a purchaser who trades at a non-conforming GXP is required to submit nominated bids, while a purchaser who trades at a conforming GXPs may elect whether to submit a difference bid.

List of conforming and non-conforming GXPs

Clause 13.27G of the Code requires the Authority to publicise and maintain a list of all non-conforming and conforming GXPs, including:

(a) the mean demand (in MW) for each GXP calculated in accordance with clause 1(b) of Schedule 17.7 of the Code; and
(b) if the mean demand for a GXP is 10 MW or more, the unpredictability measure for the GXP calculated in accordance with clause 1(c) of Schedule 13.7 of the Code.

This information is provided below.

Criteria for departing from the methodology

Under clause 13.27C(2), the Authority must make a determination in accordance with the methodology set out in Schedule 13.7 of the Code, unless:

(a) the Authority has applied the methodology; and
(b) according to the methodology, the GXP is a conforming GXP; and
(c) the Authority considers that the GXPs should be treated as a non-conforming GXP; and
(d) the Authority has publicised criteria under clause 13.27E of the Code; and
(e) making a determination that the GXP is a non-conforming GXP is in accordance with the criteria.

If paragraphs 2(a) to 2(e) apply, the Authority may make a determination in accordance with the criteria (clause 13.27C(3)).

The Authority must consult with participants before publicising the criteria or amending the publicised criteria (clause 13.27E(2) of the Code).

The Authority has completed a consultation on the criteria and these are published below.

Process for requesting the Authority to reconsider a determination

Under clause 13.27H, the system operator may request the Authority to reconsider a determination for a GXP, and a purchaser may request the Authority to reconsider a determination for a GXP at which the purchaser purchases electricity. The person making the request may provide relevant information to the Authority. Requests can be emailed to [javascript protected email address] with “Conforming and non-conforming GXPs” in the subject line, or posted to the Electricity Authority, PO Box 10041, Wellington 6143.

Back to top Last updated on 14 May 2012