Electrical half hourly raw and cleaned datasets for Great Britain from 2009-11-05

2021-03-02: Version 4.0.0 was created. Due to a new interconnecter (IFA2 - https://en.wikipedia.org/wiki/IFA-2) being commissioned in Q1 2021, there is an additional column with data from National Grid - this is called 'POWER_NGEM_IFA2_FLOW_MW' in the espeni dataset. In addition, National Grid has dropped the column name 'FRENCH_FLOW' that used to provide the value for the column 'POWER_NGEM_FRENCH_FLOW_MW' in previous espeni versions. However, this has been changed to 'IFA_FLOW' in National Grid's original data, which is now called 'POWER_NGEM_IFA_FLOW_MW' in the espeni dataset. Lastly, the IO14 columns have all been dropped by National Grid - and potentially unlikely to appear again in future. 2020-12-02: Version 3.0.0 was created. There was a problem with earlier versions local time format - where the +01:00 value was not carried through into the data properly. Now addressed - therefore - local time now has the format e.g. 2020-03-31 20:00:00+01:00 when in British Summer Time. 2020-10-03: Version 2.0.0 was created as it looks like National Grid has had a significant change to the methodology underpinning the embedded wind calculations. The wind profile seems similar to previous values, but with an increasing value in comparison to the value published in earlier the greater the embedded value is. The 'new' values are from https://data.nationalgrideso.com/demand/daily-demand-update from 2013. Previously: raw and cleaned datasets for Great Britain's publicly available electrical data from Elexon (www.elexonportal.co.uk) and National Grid (https://demandforecast.nationalgrid.com/efs_demand_forecast/faces/DataExplorer). Updated versions with more recent data will be uploaded with a differing version number and doi Pre-print of methodology can be downloaded from: http://arxiv.org/abs/2006.15717 All data is released in accordance with Elexon's disclaimer and reservation of rights. https://www.elexon.co.uk/using-this-website/disclaimer-and-reservation-of-rights/ This disclaimer is also felt to cover the data from National Grid, and the parsed data from the Energy Data Analytics Group at the University of Birmingham too.Grant funding as part of Research Councils (UK) EP/L024756/1 - UK Energy Research Centre research programme Phase 3 Grant funding as part of Research Councils (UK) EP/V012053/1 - The Active Building Centre Research Programme (ABC RP