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Bid/Offer Volumes

About

The Bid/Offer Volumes chart can show the Offer and Bid Volumes that apply in the market for a given time period. The chart also has indications for the price and has the option of showing accepted, next declared or total declared (up to MEL or down to 0). This may offer an insight into where this is because units are unable to participate or where units are not having volumes accepted.

When set to LIVE, this shows the prices at which any units are being turned up or down in the live minute. When set by period, for instance P+1 it will show volumes at all units seeing any balancing actions in the settlement period following the current period.

The data is grouped by fuel and can be filtered by “Fuel Type”. If no filter is set, it is possible to click on a column to see the same chart for all units of a given fuel type. Having done so, it is then possible to click on any column to see the balancing action at the given unit in more detail.

Included Data

The data on this chart is the Accepted (or Next Declared or Declared) Bid/Offer Volume data, which represents the volume of actions taken (or next available to be taken or available to be taken) by National Grid to reduce/increase generation via the Balancing Mechanism within gate-closure.

Data Service

The data for the Bid/Offer Volumes chart can be extracted from the API. The parameters are as follows:


Code Required/Optional Description
chart Required bovol
update Optional If false will always return data, else will return no data message if no change since submitted time
gmtupdatetime Required if update=true If update=true must put in the time of the last update. Can use the top field timestamp="2018-06-20T08:46:51" to get the last check time and then this feature can be used to only get data when a change has occurred.
format Required The type of format. The value could be xml or csv. (See 'formats' action)
targettime Required The time selection (as in the URL on the matching charts), e.g. live or 0 for current period or -2 for current period minus 2
accdecl Required Whether for accepted actions (0) or declared ones (1)
fuel Optional If not set (or equal to all) will show the summary values by fuel, else if set for battery, biomass, ccgt, coal, hydro, nuclear, ocgt, ps or wind this will show the values for each of the units of the given fuel types. The tags are as in the URL once an option has been picked on the chart view.

Example :

enprompt.netareports.com/dataService?username=xxx&password=yyy&format=xml&action=data&chart=bovol&update=false&targettime=live&accdecl=0&fuel=all