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This folder provides access to datasets that relate to the operation of the retail electricity market.


The wholesale folder provides access to a wide range of data relating to the operation of the wholesale electricity market. For example, final pricing raw case files, vSPD input GDX files, and CSV files containing final prices, half hourly metered data, bids and offers, and much more.

Ancillary services

This folder provides access to datasets that relate to the operation of markets for ancillary services. Electricity markets require ancillary services to ensure the quality and reliability of the electricity supply is maintained at acceptable levels. Offers to supply frequency keeping services are an example of the data available to be downloaded.

Forward markets

This folder provides access to information and datasets relating to forward markets. For example, the weekly report summarising activity on the ASX New Zealand electricity futures and options exchange and the New Zealand electricity hedge disclosure system. Forward markets can take many forms, and enable parties to manage price or location risks by trading contracts derived from the spot market for electricity.


Environmental factors such as weather can significantly influence outcomes in the electricity market. This folder provides access to environmental datasets. For example, lake levels and inflows into hydro storage reservoirs.

Supplementary information

This folder provides access to supplementary information that supports reports published elsewhere by the Electricity Authority. For example, the analysis undertaken to support a consultation project or an industry study.


vSPD is an independently audited, mathematical replica of the Scheduling, Pricing and Dispatch (SPD) market clearing engine used in the administration and operation of the New Zealand electricity market.


GEM, which stands for Generation Expansion Model, is a GAMS-based, long-term capacity expansion model of the New Zealand electricity sector.


Doasa is a version of the stochastic dual dynamic programming technique applied to the solution of hydro-thermal scheduling problems.


The Hydro Supply Security (HSS) test applies a deterministic methodology to calculate the risk of a storable hydro supply shortage by assuming that storable hydro is treated as the last resort supply of energy. The HSS test is encapsulated in a simplified version of the vSPD model.

Short Link


Name Date modified File size
2009 24/02/2014 8:23:31 p.m.
2010 24/02/2014 8:24:04 p.m.
2011 19/02/2014 8:45:08 p.m.
2012 31/01/2014 11:36:47 a.m.
2013 31/01/2014 12:09:57 p.m.
2014 1/01/2015 8:00:47 p.m.
2015 5/01/2016 8:00:34 p.m.
2016 1/01/2017 8:52:14 a.m.
2017 23/08/2017 12:31:32 p.m.
MSS_111112017031100071_0X.ZIP 13/03/2017 4:30:26 p.m. 6,235 KB
MSS_11112017041100044_0X.ZIP 4/04/2017 9:36:26 a.m. 6,093 KB
MSS_11112017041100966_0X.ZIP 4/04/2017 11:00:12 a.m. 6,478 KB
MSS_11112017071200123_0X.ZIP 3/07/2017 7:39:37 a.m. 6,270 KB
MSS_141112017021100811_0X.ZIP 16/02/2017 8:04:02 a.m. 6,285 KB
MSS_161112017061200688_0X.ZIP 18/06/2017 7:50:48 a.m. 6,277 KB
MSS_161112017061200692_0X.ZIP 18/06/2017 7:50:33 a.m. 6,277 KB
MSS_171112016101100887_0X.ZIP 19/10/2016 11:29:29 a.m. 6,269 KB
MSS_171112017061200524_0X.ZIP 19/06/2017 8:20:33 a.m. 6,277 KB
MSS_181112017061200421_0X.ZIP 20/06/2017 7:55:33 a.m. 6,286 KB
MSS_191112017021100656_0X.ZIP 22/02/2017 9:23:14 a.m. 6,272 KB
MSS_191112017061200313_0X.ZIP 21/06/2017 7:55:40 a.m. 6,298 KB
MSS_201112017061200162_0X.ZIP 22/06/2017 7:39:38 a.m. 6,297 KB
MSS_211112017061200976_0X.ZIP 23/06/2017 7:49:38 a.m. 6,290 KB
MSS_21112017071200967_0X.ZIP 4/07/2017 7:49:39 a.m. 6,278 KB
MSS_221112017061200798_0X.ZIP 24/06/2017 8:19:38 a.m. 6,285 KB
MSS_231112017061200591_0X.ZIP 26/06/2017 2:04:35 p.m. 6,277 KB
MSS_241112017061200348_0X.ZIP 26/06/2017 7:39:28 a.m. 6,272 KB
MSS_251112016081200334_0X.ZIP 29/08/2016 3:05:36 p.m. 6,246 KB
MSS_251112017061200212_0X.ZIP 27/06/2017 7:39:31 a.m. 6,290 KB
MSS_261112016081200091_0X.ZIP 29/08/2016 3:05:21 p.m. 6,233 KB
MSS_261112017061200196_0X.ZIP 28/06/2017 11:29:29 a.m. 6,302 KB
MSS_271112016081200835_0X.ZIP 29/08/2016 2:53:22 p.m. 6,225 KB
MSS_271112017061200899_0X.ZIP 29/06/2017 7:39:31 a.m. 6,294 KB
MSS_281112017061200752_0X.ZIP 30/06/2017 7:39:35 a.m. 6,289 KB
MSS_291112017061200161_0X.ZIP 3/07/2017 8:39:36 a.m. 6,274 KB
MSS_301112017061200353_0X.ZIP 2/07/2017 7:54:36 a.m. 6,294 KB
MSS_31112017071200770_0X.ZIP 5/07/2017 7:54:08 a.m. 6,280 KB
MSS_41112016111100461_0X.ZIP 8/11/2016 10:36:17 a.m. 6,275 KB
MSS_41112016111100744_0X.ZIP 7/11/2016 1:13:14 p.m. 6,253 KB
MSS_61112017081200078_0X.ZIP 8/08/2017 10:44:36 a.m. 6,270 KB

Link to this folder: