2018 Modifications

DCRP/MP/18/01 - EREC P28

Last Updated: 01/04/2019

Status	Approved by the Authority
Proposer	The Distribution Code Review Panel - www.dcode@energynetworks.org 020 7706 5105
Summary	The proposed EREC P28 Issue 2 constitutes a full technical revision of Issue 1 published in 1989 and has been extended, amongst other things, to cover assessment and limits for rapid voltage changes (RVCs). The review and subsequent revision of EREC P28 has been overseen by a joint Working Group of various key stakeholders with co-ordination provided by the Energy Networks Association (ENA).
Impact	High Impact: None Medium Impact: New developers of embedded generation installations, new demand users and existing users that make changes to existing installations with significant number of transformers that cause rapid voltage changes (RVCs) when energised, who are required to design their installations in accordance with the requirements and planning levels for RVCs in EREC P28. Low Impact: All Users of the Distribution System. The modifications are intended not to unduly impact on or cause interference to existing Users of public electricity systems/networks. Users that propose to connect disturbing equipment/fluctuating installations to the system, which could result in flicker, who need to carry out assessments and measurements in accordance with EREC P28.
Working Group	DCRP EREC P28 Working Group
Consultation	The Distribution Code public consultation sought views from industry stakeholders on the modification to both the ‘DCode’ and Engineering Recommendation (EREC) P28. It was published on the 8 January 2018 with a deadline for responses by 31 January 2018. DCRP/18/01/PC Consultation Pack
Report to Authority	The initial DCRP/MP/18/01 Report to Authority - EREC P28 was submitted to the Authority on 24 December 2018. Report to Authority Report to Authority Annexes The initial DCRP/MP/18/01 Report to Authority - EREC P28 was submitted to the Authority on 26 February 2019. Report to Authority Report to Authority Annexes
Authority Decision	The Authority rejected the initial submission of DCRP/MP/18/01 Report to Authority - EREC P28 Authority Decision Letter The Authority has approved the re-submission of DCRP/MP/18/01 Report to Authority - EREC P28 of 9 May 2019 to be implemented on 23 May 2019. Authority Decision Letter

DCRP/GC0106 - Implementation of the EU NC System Operation Guidelines

Last Updated: 01/04/2019

Status	Approved by the Authority
Proposer	The Distribution Code Review Panel - www.dcode@energynetworks.org 020 7706 5105
Summary	This modification is to ensure that the data exchange provisions within the Distribution Code are compliant with the requirements of the European Network Code – Transmission System Operation Guideline (SOGL) and of the KORRR.
Impact	High Impact: None Medium Impact: None Low Impact: Installers of Type A power generating modules of less than 16A per phase.
Working Group	https://www.nationalgrideso.com/codes/grid-code/modifications/gc0106-data-exchange-requirements-accordance-regulation-eu-20171485
Consultation	The Distribution Code public consultation sought views from industry stakeholders on the modification to both the ‘DCode’. It was published on the 2018 with a deadline for responses by 2018. DCRP/18/01/PC Consultation Pack
Report to Authority	DCRP/GC0106 - Report to Authority
Authority Decision	The Authority approved the submission of DCRP/GC0106 Report to Authority - Implementation of the System Operation Guidelines on 08 March 2019 with an implementation date of 14 March 2019 DCRP/GC0106 - Authority Decision

DCRP/MP/18/03 - P2/7 Security of Supply

Last Updated: 01/04/2019

Status	Approved by the Authority
Proposer	The Distribution Code Review Panel - www.dcode@energynetworks.org 020 7706 5105
Summary	ENA EREC P2 is a planning standard and an Annex 1 document to the Distribution Code. The proposed modification of this document has been written to recognise the changes to the load and generation connected to distribution networks since EREC P2/6 was published in 2006. In particular it recognises that: some demand customers are modifying their electricity consumption in response to market signals; this means that further consideration has to be given to establishing the true demand on the network; in addition to providing security of supply from network assets and distributed generation, demand side services can also contribute to security of supplies; and the nature and type of distributed generation connected to the network mean that their contribution to security of supplies is different to that in EREC P2/6.
Impact	High Impact: None Medium Impact: None Low Impact: The proposed new EREC P2/7 is expected to have a medium impact on the way in which Distribution Network Operators (DNOs) assess the network demand that needs to be secured and established the optimum means of securing that demand via a combination of network and non-network solutions.
Working Group	DCRP P2 Working Group
Consultation	The Distribution Code public consultation sought views from industry stakeholders on the modification to both the ‘DCode’ and Engineering Recommendation (EREC) P2/7. It was published on the 13 March 2018 with a deadline for responses by 19 April 2018. DCRP/18/03/PC Consultation Pack
Report to Authority	EREC P2 Report to Authority May 2018 EREC P2 Report to Authority Annexes May 2018
Authority Decision	The Authority has approved DCRP/MP/18/03 - Report to Authority - P2/7 Secuity of Supply on 14 June 2019 and implemented on 10 August 2019. DCRP/MP/18/03 - Authority Decision

DCRP/MP/18/04 -

DCRP/MP/18/05 - European Network Code – Demand Connection Code (DCC)

Status	Approved by the Authority
Proposer	The Distribution Code Review Panel - www.dcode@energynetworks.org 020 7706 5105
Summary	This modification will set out within the Distribution Code and Grid Code the following compliance obligations in the European Network Code – Demand Connection Code (DCC) 1. Technical requirements for New* Transmission-connected Demand Facilities; Transmission-connected Distribution Facilities and Distribution Systems. 2. Technical requirements for Demand Units used by a Demand Facility or a Closed Distribution System to provide Demand Response Services to System Operators. * ‘New’ is defined as not being connected to the system at the time that the code enters into force and not having concluded a final and binding contract for the purchase of main plant items by two years after entry into force.
Impact	High Impact: None Medium Impact: None Low Impact: All Users of the Distribution System
Working Group	European Network Codes
Consultation	A GC0104 consultation on the development of the proposals for the Grid and Distribution Codes was undertaken from 8 March 2018 to 29 March 2018. Feedback from the formal consultation in March, together with some specific discussions with stakeholders on their response to that consultation, were used to develop the draft of the Distribution Code for the consultation that ran from 17 May to 08 June 2018. DCRP/18/05/PC Consultation Pack
Report to Authority	Report to Authority Report to Authority Appendices
Authority Decision	The Authority approved DCRP/MP/18/05 - Report to Authority - P2/7 Secuity of Supply on 05 September 2019 with an implementation date of 07 September 2019. DCRP/MP/18/05 - Authority Decision

DCRP/MP/18/06 -

DCRP/MP/18/07 - G99 - clarification of Limited Frequency Sensitive Mode – Overfrequency requirements for Type A and B Power Generating Modules

Last Updated: 05/08/2019

Status	Approved by the Authority
Proposer	The Distribution Code Review Panel - www.dcode@energynetworks.org 020 7706 5105
Summary
Impact	High Impact: None Medium Impact: None Low Impact: None
Working Group
Consultation	The Distribution Code public consultation sought views from industry stakeholders on the modification to both the ‘DCode’ and Engineering Recommendation (EREC) G59 and EREC G83. It was published on the 02 July 2018 with a deadline for responses by 27 July 2018. DCRP/18/07/PC Consultation Pack
Report to Authority
Authority Decision	The Authority has approved DCRP/MP/18/07 - Report to Authority - Revision of Engineering Recommendation (EREC) G99 on 29 November 2018 with an implementation date of 10 December 2018. DCRP/MP/18/07 - Authority Decision

DCRP/MP/18/08 - DC0079 Frequency Changes during Large Disturbances and their Impact on the Total System

Last Updated: 05/08/2019

Status	Approved by the Authority, Awaiting Implementation
Proposer	The Distribution Code Review Panel - www.dcode@energynetworks.org 020 7706 5105
Summary	It is recommended that the Distribution Planning Code and EREC G59 should be changed to ensure that all existing embedded generators make changes to comply with the following: That where rate of change of frequency (RoCoF) protection relays are used, as part of Loss of Mains protection, the applied setting should be 1Hzs-1 with a definite time delay of 500ms. That vector shift protection technique should be removed where it is in use as Loss of Mains protection. That existing Loss of Mains protection settings for type-tested generators need not be changed. Any existing over-frequency setting relays still set at 50.5Hz should if possible be reset to 52.0Hz. Given the retrospective nature of the proposed change, the workgroup recommends the creation of an implementation team, with the governance, resourcing and stakeholder representation necessary to assure efficient and effective implementation of the proposed changes.
Impact	High Impact: All non-type-tested embedded generators with plant rated >16A per phase commissioned before 1 February 2018 Medium Impact: None Low Impact: None
Working Group	DCRP DC0079 Working Group
Consultation	The Distribution Code public consultation sought views from industry stakeholders on the modification to both the ‘DCode’ and Engineering Recommendation (EREC) G59 and EREC G83. It was published on the 31 January 2018 with a deadline for responses by 23 February 2018. DCRP/18/04/PC Consultation Pack
Report to Authority	Following the meeting of the Distribution Code Review Panel (the Panel) held on 7^th February 2019, it was agreed that the Report to Authority would be amended with minor changes before submission of the Report to Authority for approval. The Panel agreed to this submission and that the modification proposals better facilitate the objectives of the Distribution Code. Subject to the agreement of the Authority the modification should be implemented from the date the revised Distribution Code is published. This date is proposed as 01 May 2019. DC0079 Retrospective Action Report to Authority DC0079 Retrospective Action Report to Authority Annexes
Authority Decision	The Authority has approved DCRP/MP/18/08 - Report to Authority - DC0079 Frequency Changes during Large Disturbances and their Impact on the Total System on 05 August 2019 with an implementation date of 01 September 2019. DCRP/MP/18/08 - Authority Decision

DCRP/MP/18/09 - Revision of Engineering Recommendations (EREC) G98 and G99 for the storage fast track process

Last Updated: 01/04/2019

Status	Approved by Authority
Proposer	The Distribution Code Review Panel - www.dcode@energynetworks.org 020 7706 5105
Summary	In response to increasing volumes of applications for small scale storage (< 16 A per phase of storage on the same site as existing G83 generation) the ENA co-ordinated a G59 fast track storage procedure, which DNOs have implemented. This allows for a simplified connection procedure, and reduced response times (compared with a standard G59 application). During the time that ERECs G98 and G99 were under development, this was seen as an opportunity to formalise this fast track procedure in the both documents. However, the currently published versions of G98 and G99 were close to being ready for consultation prior to submission to the Authority for approval, and DNOs wanted to take sufficient time over agreeing the drafting for the fast track procedure in G99 – hence the fast track drafting forming a separate modification. DNOs considered that EREC G99 was the most appropriate document to capture the fast track procedure as: The original fast track procedure was a G59 fast track, and There were concerns about including a procedure in G98 in which total generation capacity would exceed 16 A per phase. EREC G98 has been modified to make it clear that consideration of fast track applications for storage connections will be dealt with within EREC G99. Section 6.2.2 has been added to G99 to effect this. The procedure written into G99 mirrors that in the ENA document Fast Track Application Process for EREC G59 Energy Storage Devices – Guidelines May 2018. In G99, the procedure is called Integrated Micro Generation and Storage. In addition, two new forms have been added to the G99 appendices, for use with the new procedure (A1-2 application form and A3-2 installation document). Again, these forms have drawn upon existing forms in use for the G59 fast track procedure. Copies of the draft modified G98 and G99 were included in the consultation.
Impact	High Impact: None Medium Impact: None Low Impact: Manufacturers and developers of small domestic storage devices
Working Group
Consultation	The Distribution Code public consultation sought views from industry stakeholders on the modification to both the ‘DCode’ and Engineering Recommendations (EREC) G98 and G99. It was published on the 14 August 2018 with a deadline for responses by 11 September 2018. DCRP/18/09/PC consultation pack
Report to Authority	Report to Authority Report to Authority Annexes
Authority Decision	The Authority approved DCRP/MP/18/09 Report to Authority - National Grid Legal Separation changes to the Distribution Code on 29 November 2018 with an implementation date of 10 December 2018. Authority Decision Letter

DCRP/MP/18/10 - National Grid Legal Separation

Last Updated: 01/04/2019

Status	Approved by Authority
Proposer	jackie.mesnard@nationalgrid.com - National Grid
Summary	On April 1st 2019 National Grid Electricity Transmission plc ’NGC’ is to be legally separated into two independent legal entities; National Grid Electricity System Operator Limited (NGESO), and National Grid Electricity Transmission plc (NGET), which are set to become the system operator and transmission owner respectively. The purpose of the modification is to update the Distribution Code to reflect the creation of a new entity, National Grid Electricity System Operator Limited (NGESO) that is legally separated from National Grid Electricity Transmission plc (NGET) and to ensure the system operator and transmission owner obligations are clear. This also results in a consequential change to the Constitution and Rules of the Distribution Code Review Panel of Great Britain.
Impact	Other Codes Although this modification proposal does not directly impact other industry codes, other modifications to industry codes (BSC, CUSC, DCUSA, Grid Code, SQSS and STC) are being raised in parallel to this modification proposal as a result of creating a legally separate System Operator. Does this modification impact a Significant Code Review (SCR) or other significant industry change projects, if so, how? No Does this modification impact Users of DNOs’ Systems? No Environmental Impact Assessment There are no environmental impacts associated with this proposed modification.
Working Group	N/A
Consultation	The Distribution Code public consultation sought views from industry stakeholders on the modification to both the ‘DCode’ and the ‘Constitution and Rules of the Distribution Code Review Panel of GB’. It was published on the 18 September 2018 with a deadline for responses by 2 October 2018. DCRP/18/10/PC Consultation Pack
Report to Authority	Following the meeting of the Distribution Code Review Panel (the Panel) held on 7^th February 2019, it was agreed that the Report to Authority would be amended with minor changes before submission of the Report to Authority for approval, having already agreed this course of action at the 6^th December 2018 meeting. The Panel agreed to this submission and that the modification proposals better facilitate the objectives of the Distribution Code. Subject to the agreement of the Authority the modification should be implemented from the date the revised Distribution Code is published. This date is proposed as 1^st April 2019. Report to Authority Report to Authority Appendices
Authority Decision	The Authority approved DCRP/MP/18/10 Report to Authority - National Grid Legal Separation changes to the Distribution Code on 22 February 2019 with an implementation date of 1 April 2019. Authority Decision Letter

If you would like details of any modifications listed above, please email dcode@energynetworks.org