---
license: odc-by
task_categories:
- time-series-forecasting
- tabular-regression
language:
- en
tags:
- energy
- electricity
- power-generation
- carbon-intensity
- renewables
- wind-power
- solar-power
- nuclear-power
- gas
- coal
- biomass
- hydro
- uk
- great-britain
- climate
- net-zero
- grid
- timeseries
- tabular
- pandas
- duckdb
- tsfile
- modality:timeseries
- format:tsfile
pretty_name: UK Electricity Generation Mix 2019-2026 (TsFile)
size_categories:
- 100K<n<1M
modality:
- tabular
- timeseries
---

# UK Electricity Generation Mix & Carbon Intensity, 2019–2026 (TsFile)

Apache TsFile version of [`Rif-SQL/uk-electricity-generation-mix-2019-2026`](https://huggingface.co/datasets/Rif-SQL/uk-electricity-generation-mix-2019-2026).

## Overview

Half-hourly electricity generation by fuel type and carbon intensity for Great
Britain, sourced from the NESO (National Energy System Operator) Historic GB
Generation Mix. Each record is a 30-minute settlement period giving generation (MW)
per fuel, aggregated totals, each fuel's share of the mix (percent), and the grid
carbon intensity.

- **Time range:** 2019-01-01 00:00 → 2026-03-19 21:30 (UTC).
- **Granularity:** 30-minute intervals.
- **Records:** 126,476.
- **Coverage:** one continuous national (GB) series — no per-region/per-unit split.

## Schema (TsFile structure)

- **Time** (INT64, milliseconds) — the settlement-period timestamp (source `DATETIME`
  in UTC).
- No TAG columns — this is a single national series.
- **FIELD columns** (33) — all kept as-is:
  - Generation by fuel (MW): `GAS`, `COAL`, `NUCLEAR`, `WIND`, `WIND_EMB`, `HYDRO`,
    `SOLAR`, `BIOMASS`, `STORAGE`, `IMPORTS`, `OTHER`.
  - Aggregated totals (MW): `GENERATION`, `FOSSIL`, `LOW_CARBON`, `ZERO_CARBON`,
    `RENEWABLE`.
  - Per-fuel / per-group share (percent): the corresponding `*_perc` columns.
  - `CARBON_INTENSITY` — grid carbon intensity (gCO₂/kWh).

Column names are lower-cased in the TsFile table.

## Usage

Read the `.tsfile` files with the Apache TsFile Java or Python SDK.

## Source & license

- Original dataset: https://huggingface.co/datasets/Rif-SQL/uk-electricity-generation-mix-2019-2026
- Author / publisher: Rif-SQL
- Underlying source: NESO Historic GB Generation Mix (https://www.neso.energy/data-portal/historic-generation-mix/historic_gb_generation_mix)
- License: Open Data Commons Attribution License (ODC-By)

## Conversion notes

- Time comes from the source `DATETIME` column (UTC), parsed to epoch milliseconds;
  the `DATETIME` column is folded into Time and not retained as a duplicate field
  (fixed 30-minute cadence, unique timestamps → lossless).
- No TAG columns and no rows dropped; all 33 numeric measurement columns are kept as
  FIELD.