02 April 2018
- Last edited 11 July 2018
Prices are determined at nodes or points of connection (POCs) on the grid by the SPD model. There are about 240-260 nodes at which a price is published, although the precise number changes over time. I believe it is currently 242.
Join POC_Code in the generation file with Node in the price file.
Join Trading_date in the generation file with Trading_date in the price file.
Trading periods are denoted 1, 2, .. 48 or TP1, TP2, ... TP48. Trading period 1 starts at midnight, trading period 2 starts at 12:30am, trading period 3 starts at 1:00am, etc. Be aware of daylight saving. On the day daylight saving commences there are only 46 trading periods and on the day it ends, there are 50.
A site is just the the three letter code formed by stripping off the first three characters of the node or POC label - it denotes the geographic location. See also the NSP table. Nwk_Code is the label for the network. There are 29 distribution networks in New Zealand. Gen_code is a name given to the generating plant doing the injecting at the POC. Fuel and Tech codes are fuel and technology descriptors. For the purpose of joining generation data to price data you can ignore, Site, Nwk_code, Gen_code, Fuel_Code and Tech_Code.
Prices are $/MWh.
I trust this helps,