The Grid Code details the technical requirements for connecting to and using the NI System. Compliance with the Grid Code is one of the requirements of connecting and using the Transmission System.
As the code administrator for the Grid Code, SONI maintains and oversees any proposed changes to it. All changes must be reviewed by the Grid Code Review Panel, consulted upon and approved by the Authority. For more information about the code please contact gridcode@soni.ltd.uk
The Grid Code can be found here
To view a list of updates to the SONI Grid Code click here.
The Power Park Module Settings Schedule [RfG] can be found here.
The Wind Farm Settings Schedule [non RfG] can be found here
The Synchronous Condenser Implementation Note can be found here
The Integration of Batteries Implementation Note can be found here
The Batteries ESPS Compliance Procedure can be found here
The Batteries ESPS Signal List can be found here
The Grid Code Review Panel is a standing body established and maintained by SONI. The objective of the Panel is to keep the Grid Code and its working under review; to review all suggestions for amendments to the Grid Code; to determine recommendations for amendments to the Grid Code; to issue guidance in relation to the Grid Code and its implementation, performance and interpretation; and to consider what changes are necessary to the Grid Code arising out of any unforseen circumstances
The Constitution of the SONI Grid Code can be found here
The Membership of the SONI GCRP can be found here
The Guidance for Modifications to the Grid Code can be found here
DSU Approved Modifications
Regulatory Approval Letter for Grid Code Modification application is available here.
Regulatory Approval Document 16112016 Outturn Availability is available here
Regulatory Approval Letter 16112016 Outturn Availability is available here
Regulatory Approved Document Power Park Module 16112016 is available here
Regulatory Approval Letter 16112016 Power Park Module is available here
Regulatory Approved Document Dynamic Models 16112016 is available here
Regulatory Approval Letter 16112016 Dynamic Models is available here
Regulatory Approval Letter 17122015 (retirement of plant) is available here
Regulatory Approval Letter 05102015 is available here
Regulatory Approval Letter 29092015 is available here
Regulatory Approval Letter 30042015 is available here
DSU 2013 Modification is available here
DSU Application Form Data Modification is available here
DSU Notice Time Modification is available here
DSU Signal Requirements Modification is available here
Proposed modifications to the SONI Grid Code in respect of Demand Side Units published 10th May 2013 is available here
Regulatory Approval Letter 05102015 is available here
Failure to Synchronise Grid Code Modifications (Clean) is available here
Failure to Synchronise Grid Code Modifications (Redline) is available here
WFPS Grid Code Modifications (Clean) is available here
WFPS Grid Code Modifications (Redline) is available here
Intraday Trading Grid Code Modifications (Comparison Result) is available here
Intraday Trading Grid Code Modifications (Modified Document) is available here
SONI Grid Code - Meter Code Modification can be found here
RoCoF Grid Code Modification Report to NIAUR published 27 August 2013 is available here
RoCoF Grid Code Modifications (Clean) is available here
RoCoF Modifications Proposal - TSOs Opinion is available here
RoCoF Modification Consultation Paper is available here
PPM Setting Schedule RFG Changes Redline - February 2020
SONI Grid Code RfG Redline - February 2020
FERA modification on Minimum Aggregation Value is available here
DRAI modification on Maximum Down Time is available here
SONI Grid Code Consultation - Incorporation of Approved Grid Code Modification 1Hz per sec RoCoF available here
SONI Consultation Paper: Additional Solar PV Signals available here
Integration of Batteries Implementation Note available here
Battery ESPS Compliance Procedures available here
Battery ESPS Signal List available here
SONI Consultation on Meter Code Modification Proposals is available here
SONI Consultation on Governance Rules and Constitution of the Grid Code is available here
SONI Grid Code Constitution March 2022 is available here
SONI Grid Code Governance Modifications is available here
SONI Grid Code Modification Proposal on Maximum Continuous Rating Requirement is available here
SONI Grid Code Modification Proposal on Updating the Metering Code is available here, Grid Code Modifications Redline Document available here.
FERA modification on Minimum Aggregation Value Consultation is available here
DRAI modification on Maximum Down Time Consultation is available here
UR RfG Grid Code Approval Letter October 2020 available here
SONI RfG Modification Proposals Consultation Paper May 2020 available here
PPM Setting Schedule Green Line Version RfG Mod Proposal May 2020 available here
PPM Setting Schedule Red Line Version RfG Mod Proposal May 2020 available here
Grid Code Green Line Version RfG Mod Proposal May 2020 available here
Grid Code Red Line Version RfG Mod Proposal May 2020 available here
PPM Setting Schedule Green Line Version RfG Mod Proposal July 2019 available here
PPM Setting Schedule Red Line Version - RfG Mod Proposal July 2019 available here
SONI Housekeeping and RfG Modification Proposals Consultation Paper July 2019 available here
SONI Grid Code Modification Proposal on Over-installed Units available here
SONI Consultation on Advanced Meter Reconcilation Consultation paper Appendix B is available here
SONI Consultation on Advanced Meter Reconcilation Consultation paper Appendix A is available here
SONI Consultation on Advanced Meter Reconcilation Consultation paper is available here
SONI Consultation on Advanced Meter Reconciliation Cover Letter is available here
SONI Consultation on Outturn Availability Grid Code Modification published 15 February 2016 is available here
SONI Grid Code Modification Proposal on Outturn Availability (clean) is available here
SONI Grid Code Modification Proposal on Outturn Availability (redline) is available here
Power Park Modules Grid Code Amendments Consultation Paper published 8 January 2016 is available here
Power Park Modules Grid Code Amendments Consultation Paper (Grid Code amendments - clean) published 8 January 2016 is available here
Power Park Modules Grid Code Amendments Consultation Paper (Grid Code amendments - redline) published 8 January 2016 is available here
SONI Consultation Information Letter on Notice of Intention to Disconnect due to Retirement of Plant is available here
SONI Consultation on Notice of Intention to Disconnect due to Retirement of Plant is available here
Dynamic Modelling Modification Consultation Introduction Report Final - published 2 December 2013 is available here
Draft Modelling SONI Grid Code Modification v4 redline - is available here
Demand Side Units - Grid Code Amendments Consultation Paper published 10 May 2013 is available here
Demand Side Units - Grid Code Amendments Consultation Paper published 1 November 2011 is available here
Demand Side Units - Grid Code Amendments Consultation Paper (Grid Code amendments - clean) published 1 November 2011 is available here
Demand Side Units - Grid Code Amendments Consultation Paper (Grid Code amendments - redline) published 1 November 2011 is available here
Process for the Calculation of Outturn Availability Consultation Document published 1 February 2013 is available here
Rate of Change of Frequency Modifications Grid Code Amendments Consultation Paper published 17 October 2012 is available here
Eirgrid response to the Consultation Paper on Treatment of Curtailment in Tie-break Situations (SEM-12-028) published 25 May 2012 is available here
Failure to Follow Synchronising Instruction Grid Code Amendments Consultation Paper published 23 May 2012 is available here
WFPS Ramp Rate Grid Code Amendments Consultation Paper published 8 November 2011 is available here
On 14 April 2016, Commission Regulation (EU) 2016/631 establishing a network code on requirements for grid connection of generators (hereafter referred to as ‘RfG’) entered in force. Regulation (EU) 2016/631. The incorporation of the RfG parameters into the Northern Ireland Grid Code was approved by the UR on 16.11.2018.
On 7 September 2016, the Commission Regulation (EU) 2016/1388 establishing a network code on requirements for demand connection (hereafter referred to as ‘DCC’) entered in force. Regulation (EU) 2016/1388. The incorporation of the DCC parameters into the Northern Ireland Grid Code was approved by the UR on 09.04.2019.
On 15 September 2016, Commission Regulation (EU) 2016/1447 establishing a network code on requirements for grid connection of high voltage direct current systems and direct current-connected power park modules (hereafter referred to as ‘HVDC’) entered in force. Regulation (EU) 2016/1447. The incorporation of the HVDC parameters into the Northern Ireland Grid Code was part approved by the UR on 27.06.2019.
The European Network Codes page can be found here
Information on the application of the connection codes to existing users can be found here