Day Ahead Constraint Flows and Limits

The data below is a snapshot of the limits and flows at relevant boundaries at day ahead stage. These flow values are calculated at Day Ahead and will not reflect any changes in the flows following the publication of this data. The boundary flows are the forecast position after Day Ahead energy scheduling has been run.

Please note that from the 22nd April 2024 the flows no longer consider expected constraint mitigation or optimisation actions. Before this date the data did consider constraint mitigation actions. This change has happened as the software used to collate this information has been updated.

The network diagrams show the constraint boundaries and arrows indicating the positive direction of power flow across each boundary.

CKAN Data API

Access resource data via a web API with powerful query support.
Further information in the main CKAN Data API and DataStore documentation.

The Data API can be accessed via the following actions of the CKAN action API.

Query
`https://api.neso.energy/api/3/action/datastore_search`
Query (via SQL)
`https://api.neso.energy/api/3/action/datastore_search_sql`

Query example (first 5 results)
`https://api.neso.energy/api/3/action/datastore_search?resource_id=38a18ec1-9e40-465d-93fb-301e80fd1352&limit=5`
Query example (via SQL statement)
`https://api.neso.energy/api/3/action/datastore_search_sql?sql=SELECT * from "38a18ec1-9e40-465d-93fb-301e80fd1352" LIMIT 5`

A simple ajax (JSONP) request to the data API using jQuery.

var data = {
  resource_id: '38a18ec1-9e40-465d-93fb-301e80fd1352', // the resource id
  limit: 5 // get 5 results
};
$.ajax({
  url: 'https://api.neso.energy/api/3/action/datastore_search',
  data: data,
  dataType: 'jsonp',
  success: function(data) {
    alert('Total results found: ' + data.result.total)
  }
});

A simple ajax (JSONP) request to the data API using jQuery.

import urllib2
  url = 'https://api.neso.energy/api/3/action/datastore_search?resource_id=38a18ec1-9e40-465d-93fb-301e80fd1352&limit=5'
  fileobj = urllib2.urlopen(url)
  print fileobj.read()

Download (CSV)

Data Explorer

Table Information

Constraint Group

Title
Type	string
Description
Comment
Example
Unit

Date (GMT/BST)

Title
Type	datetime
Description
Comment
Example
Unit

Limit (MW)

Title
Type	any
Description
Comment
Example
Unit

Flow (MW)

Title
Type	any
Description
Comment
Example
Unit

field5

Title
Type	string
Description
Comment
Example
Unit

field6

Title
Type	string
Description
Comment
Example
Unit

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Day Ahead Constraint Flows and Limits

CKAN Data API

Data Explorer

Data Explorer

Table Information

Constraint Group

Date (GMT/BST)

Limit (MW)

Flow (MW)

field5

field6