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System Fuel Mix

About

The System Fuel Mix chart uses the 5-minute block fuel mix data from National Grid and plots it on a chart. The embedded wind and solar forecasts are also added to complete the view, with the embedded wind and solar forecast being from National Grid (an ahead of delivery forecast).

A trace for the SNSP (System Non-Synchronous Penetration) value is added and this is the share of generation from interconnectors and renewables as a share of demand (ie = (imports + solar + wind) / (total generation + net imports)). This shows the generation levels that do not provide Inertia as a share of the total.

Included Data

The included fuel types are as follows:

  • French Interconnector - ~2GW interconnector between France and England, landing in the South East of England.
  • Britned Interconnector - ~1GW interconnector between the Netherlands and England, landing in the South East of England.
  • NEMO Interconnector - ~1GW interconnector between Belgium and England, landing in the South East of England.
  • Moyle Interconnector - ~0.5GW interconnector between Northern Ireland and England, landing in southern Scotland.
  • East-West Interconnector - ~0.5GW interconnector between the Republic of Ireland and England, landing in North Wales.
  • Pumped Storage - These are units that will pump water uphill when the price is low and then use that water to generate power when the price is high with very fast response times.
  • Oil - Generation from oil plants - now zero MWs.
  • Other - Uncategorised generation.
  • Biomass - pure biomass units and co-firing units.
  • OCGT - These are open cycle gas turbine units and are smaller gas-fired units that typically act as high priced peaking units. Gas engines are included in this class.
  • CCGT - These are combined cycle gas turbine units and are the larger gas-fired units in the GB fuel mix. Also includes CHP units alongside units on beneficial contracts such as voltage control contracts so some units may see higher than otherwise would be expected levels of generation. The CCGT class can include baseloading (on 24 hours per day) all the way to peaking units.
  • Coal - This includes coal-fired units.
  • Nuclear - Nuclear powered power stations that typically run 24/7 when available to do so.
  • Hydro - Run of river hydro plants (i.e. not pumped storage).
  • Wind - This class includes wind powered units and contains more units that those otherwise on a by-unit level.
  • Embed Wind Fore - National Grid forecast for wind not included in the metered wind figure.
  • Embed Solar Fore - National Grid forecast for solar generation (corrects to Sheffield Solar outturn after delivery as this forecast is updated by National Grid).
  • Embed Solar Fore - National Grid forecast for solar generation (corrects to Sheffield Solar outturn after delivery as this forecast is updated by National Grid).
  • Total - The sum of all values - this can drop below the sum of the stack where interconnector exports are hidden.
  • SNSP - The System Non-Synchronous Penetration (SNSP) is a calculation of (imports + wind + solar) / (generation + net imports). This shows the generation levels that do not provide Inertia as a share of the total.

Data Service

The data for the System Fuel Mix chart can be extracted from the API. The parameters are as follows:


Code Required/Optional Description
chart Required systemfuelmix
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)

Example :

enprompt.netareports.com/dataService?username=xxx&password=yyy&format=xml&action=data&chart=systemfuelmix&update=false