Modifications

Grid Code Modifications

This table includes modifications included in Grid Code version 6 and modifications approved and proposed since the issue of Grid Code version 6.

MPID	Title	Status	Effective Date	Grid Code Version
271	Proposed Grid Code modifications for I-SEM	Consultation response period is closed	The CER will set the effective date once the go-live date for I-SEM has been formally confirmed - CER Approval
270	Proposed Housekeeping Modification WFPS 1.6.2.5	MPID 270 Recommendation Paper	04/05/2017 - CER Approval
269	MPID 269 Power Park Proposal	MPID 269 Power Park Module Recommendation Paper	10/10/2016 - CER Approval
268	MPID 268 Outturn Availability Proposal MPID 268 Supplementary Note	MPID 268 Outturn Availability Recommendation Paper	10/10/2016 - CER Approval
239	MPID 239 Dynamic Models Proposal TSO Position Paper on Retrospective Application of MPID 239 Dynamic Model Validation Guidelines Draft Dynamic Models Specifications for Users Note on Electromagnetic Transient Models	MPID 239 Dynamic Models Recommendation Paper MPID 239 Dynamic Models Recommendation Supporting Paper	01/06/2016 - CER Approval
267	MPID 267 Failure to Follow Notice to Synchronise Definition Proposal	MPID 267 Recommendation Paper	22/03/16 - CER Approval
266	MPID 266 Acronyms Proposal‌‌‌	MPID 266 Recommendation Paper	28/09/15 - CER Approval
265	MPID 265 Reactive Power‌‌	ON HOLD Proposed Modification 11 February 2015 Proposed Modification 12 November 2014
264	‌‌MPID 264 Power Quality Harmonics‌	MPID 264 Power Quality Recommendation Paper	28/09/15 - CER Approval
263	Grid Code Constitution and Rules Version 6‌	Proposed Modification 11 February 2015 Proposed Modification 12 November 2014 Constitution and Rules of the Grid Code Review Panel
262	MPID 262 WFPS Curve 2‌	ON HOLD ‌Proposed Modification 11 February 2015 Proposed Modification 12 November 2014
261	MPID 261 Connection Offers	MPID 261 Connections Offers Recommendation Paper	28/09/15 - CER Approval
260	Housekeeping of WFPS clause WFPS1.5.4.1‌‌‌	Recommendation Paper - APPROVED	19/01/15 - CER Approval	6
259	Definition Re-ordering‌‌‌	Recommendation Paper - APPROVED	19/01/15 - CER Approval	6
258	DSU Signal List‌‌‌	‌ APPROVED	19/01/15 - CER Approval	6
257	MPID 257 DSU Performance Monitoring (GCRP 40)‌‌‌‌ DSU Performance Monitoring‌‌‌ (GCRP 39)	MPID 257 DSU Performance Monitoring of DSU Dispatch Instructions Recommendation	25/09/15 - CER Approval
256	DSU Notice Time‌‌‌	Recommendation Paper - APPROVED	19/01/15 - CER Approval	6
255	DSU Housekeeping‌‌‌	‌MPID 255 Recommendation Paper- APPROVED	19/01/15 - CER Approval	6
254	MPID 254 DSU Frequency Requirements (GCRP 40)‌‌‌‌ DSU Frequency Requirements‌‌‌ (GCRP 39)	MPID 254 DSU Frequency Requirements Recommendation Paper	28/09/15 - CER Approval
253	DSU Application‌‌‌	Recommendation Paper - APPROVED	19/01/15 - CER Approval	6
252	‌‌‌MPID 252 POR Definition‌	MPID 252 Recommendation Paper	28/09/15 - CER Approval
251	WFPS Active Power Control‌‌‌	Recommendation Paper - APPROVED	19/01/15 - CER Approval	6
250	WFPS Signal Lists‌‌‌	MPID 250 Recommendation Paper	28/09/15 - CER Approval
249	Interconnector AGC‌‌‌	Recommendation Paper - APPROVED	19/01/15 - CER Approval	6
248	WFPS Voltage Regulation‌‌‌	Recommendation Paper - APPROVED	19/01/15 - CER Approval	6
247	DS3 Clarification Post Fault Active Power Recovery‌‌	Recommendation Paper - APPROVED	19/01/15 - CER Approval	6
246	Housekeeping DS3 Reactive Power‌	Recommendation Paper‌ - APPROVED	24/02/14 - CER Approval	6
245	Housekeeping DS3 Frequency Response‌	MPID245 Recommendation Paper - APPROVED	15/04/14	6
244	Housekeeping of Clause OC10.4.5.2‌	Recommendation Paper‌ - APPROVED	24/02/14 - CER Approval	6
229	RoCof Definition Proposal	Recommendation Paper APPROVED IN PRINCIPLE RoCof Definition Proposal Rate of Change Frequency Decision Paper	Approved in Principle – 04/04/2014
223	‌MPID 223 Fail to Sync November 2014	MPID 223 Fail to Sync Recommendation Paper ESB GWN Letter to CER on MPID 223 Fail to Sync	28/09/15 – CER Approval