Offer Table

About

The Offer Table screen offers a stack showing the volumes and prices for the next declared offer pair. Alongside this a variety of supporting data streams are available including the total declared prices and volumes (capped at MEL) and generation and dynamic data.

To see more information about a particular unit the user can click on the unit name and this will give an option of viewing the 'Bid/Offer Profile' chart (which will show the units prices and volumes at which it will increase or decrease output) or the 'BM Unit Operations' chart (which shows what the unit has been doing and what it plans to do in the market).

This chart is designed as a stack of the units most likely to see offers accepted from a price perspective. Row colour also shows bids (turquoise), offers (orange), offline units (light blue), offline units with a fast response time (blue) and offline units with both a fast response time and a short minimum generation time (dark blue). These blue and dark blue units are expected to carry a premium in the market. Further colouring shows where units have seen a significant change in values from 30 minutes ago this is particularly useful for seeing when units are starting up or going offline.

Note that when a unit is being bid down the price currently shown is the first offer price not the undo bid price although this may be corrected at a later date if requested.

Note that moving left and right when target time has been chosen by period will move from one settlement period to the next. This will take the average values across the settlement period. Within the settlement period levels of generation will change minute-to-minute and so LIVE and Custom Time allow for the selection of either the current position or the position at a particular time.

On this chart it is possible to examine the information at the accepted/declared bids/offers at a selected group of units. By default the first 20 units on the table will be selected.

Then information about these units can be seen for those selected by using 'Pricing Unit Details' > 'See Declared Offers...'. The selected units can be changed by clicking on the cell containing the unit name without click on the link on the name itself.

Included Data

The data on this chart is as follows:

• Next Price - The price for the next MWh of potential offer volumes.
• Next Volume - The volume in MW at which the next price applies for any potential offer volumes (from current output). Note that this can include more than one pair as pairs with the same price have been combined to make the data more easily consumable.
• Declared Price - The price for the complete offer volume up to the Maximum Export Limit (MEL).
• Declared Volume - The volume in MW for the complete offer volume up to the Maximum Export Limit (MEL).
• FPN - The pre-gate generation volumes in MW (final physical notification)
• BOA - The accepted volume in MW for this unit.
• EMV - The volume in MW of generation adjusted for balancing
• MEL - The availability or Max Export Limit in MW
• SEL - The Stable Export Limit in MW or minimum possible reduction in generation without switching off.
• MZT - The Minimum Zero Time (or time which the unit must stay at zero after it has been shutdown).
• NDZ - The Notice to Deviate from Zero (or time to start up from zero after being requested to).
• MIL - The import availability or Max Import Limit in MW
• SIL - The Stable Import Limit in MW or minimum possible import in generation without stopping importing.

Colours Guide

The following details the colours used in this chart:

Data Service

The data for the Offer Table can be extracted from the API. The parameters are as follows: