EMK:Water Values

Example Water Value Contour File

EMarket has a facility for auto-calculating Water Values. If you have changed settings within a particular Run Definition you will need to use the Calculate Water Values Now Button on the Run Resource Window if you require fresh Water Values; alternatively you need to set the Auto Calc Water Values field to True.

Water Value Contour Files

The Water Value file is named <Run Name>_WV.csv in the WVs sub-directory of the Data directory. When the Water Values are calculated using a Run Definition, the name given is the name of that Run Definition, e.g. if Water Values are provided for a Run Definition named "RunA" then the Water Value file created will be named "RunA_WV.csv".

The format of the file is as shown to the right (click to enlarge). All rows of the file are delimited by an equal number of commas so that it can be edited in Excel. The file contains the Water Values for the Hydro Systems and Hydro Stations. Due to lack of space the entire format is not shown here. The rows extend downward so there is a row for the contours for each week 1 through to 53. There is an n x 53 block of entries for the Waikato contours below the Waikato block, then another three n x 53 blocks for Waitaki, Clutha and Manapouri respectively, where n is the number of contours. After the Hydro Systems there are blocks corresponding to any hydro stations (such as: Cobb, Coleridge) in your Connections Resource.

The Water Value contour prices and names in the first and second rows apply to the contours for all four Hydro Systems and Hydro Stations, if any. Note that Water Values must increase in price from left to right across each row. Maximum storage figures and contour values are in GWh.

Calculating Water Values

Example Water Value Profile

Water Values are calculated on the basis of an entire Run Definition and are dependent on nearly all of the parameters defined for a Run. A Run Definition must have a Water Value file associated with it.

To see which file is being used in the Run Definition click the Hydro Parameters Button in the Run Window and look in the Water Value Profile field.

EMarket can calculate Water Values at any time using a specific Run's resource files. To do this use the Calculate Water Value Now button in the Water Values Options Box in the special parameters area of Run window.

Alternatively, Water Values can also be automatically calculated at run time. This can be done by setting Auto Calc Water Values field to 'True' in the Water Values Options Box in the Run Window.

The results of a Water Value calculation can be viewed graphically by double-clicking the Water Value Profile field in the Water Values Options Box in the Run Window. The Water Values Profile Window will be displayed showing individual Water Value contours. A Water Value contour relates storage levels to a particular Thermal Generator's Offer Price, and is used to determine which Offers Hydro Generators will make.