Closed Consultations

DCRP/18/04/PC - GC0079 Frequency Changes during Large Disturbances and their impact on the Total System - Phase 2

This Distribution Code consultation is seeking comments from stakeholders in particular Manufactures of Type Tested Generators and New developers of embedded generation on the proposals to modify Engineering Recommendations G59 and G83. Any interested party is able to make a response in line with the guidance set out in Section 7 of the consultation paper.

The joint Grid and Distribution Panel workgroup recommends that the Distribution and Planning Code be changed to ensure that all type tested generation commissioned on or after 1 July 2018 should demonstrate stability for defined RoCoF and vector shift disturbances.

The proposal contained in the consultation will be of importance to Manufactures of Type Tested Generators as they may need to re-test their plant to ensure compliance with the proposed requirements.

Responses to this consultation should be sent to the Distribution Code Review Panel Secretary at dcode@energynetworks.org by 17:00 on 23 February 2018 on the pro-formas provided expressly for the purpose. Responses after this date may not be considered.

DCRP/18/03/PC - Revision to Engineering Recommendation P2 - Security of Supply

This Distribution Code public consultation is seeking the views from industry stakeholders on the proposed modification to Engineering Recommendation (EREC) P2.

Security of Supply requirements previously provided in ER P2 Issue 6 (2006), would, if approved, be superseded by the modified Engineering Recommendation (EREC) P2 Issue 7 (2018).

The recommended revision to EREC P2 will ensure that DNOs can efficiently utilise Distributed Energy Resources (DER) within their network designs.

EREC P2 is an Annex 1 qualifying standard to the GB Distribution Code1 and governed by the Distribution Code Review Panel (DCRP). The DCRP establish and maintain governance arrangements for Qualifying Standards that have a material effect on Users of the Distribution System. Annex 1 documents are approved by the Authority before publication. EREC P2 is also a Distribution licence requirement.

Responses to this consultation should be sent to the Distribution Code Review Panel Secretary at dcode@energynetworks.org by 17:00 Friday 12th February 2018 on the pro-formas provided expressly for the purpose. Responses after this date may not be considered.

DCRP/18/02/PC - Requirements for all Generators – Distribution Code Amendments and new EREC G98 and EREC G99

This Distribution Code public consultation is seeking the views from stakeholders on the proposed modifications to the Distribution Code[1] and the publication of Engineering Recommendations (EREC) G98 and G99 which together implement the EU Network Code Requirements for all Generators (RfG).EREC G98 and G99 are completely new documents.They will become Annex 1 documents in the Distribution Code and therefore subject to Authority (Ofgem) approval before final publication.

[1] http://www.dcode.org.uk/

Responses to this consultation should be sent to the Distribution Code Review Panel Secretary at dcode@energynetworks.org by 17:00 Thursday 1st February 2018 on the pro-formas provided expressly for the purpose. Responses after this date may not be considered.

If you have any questions or would like to discuss this consultation further, please contact David Spillett on 020 7706 5124 or email dcode@energynetworks.org

Consultation Responses

Responses to Comments

DCRP/18/01/PC - Revision to Engineering Recommendation P28 - Voltage fluctuations and the connection of disturbing equipment to transmission systems and distribution networks in the United Kingdom

The requirements in EREC P28 are intended for persons who:

• propose to connect disturbing equipment to the public electricity supply system that have the potential for causing voltage fluctuations
• propose to alter disturbing equipment/installations connected to the public electricity supply system that would result in material changes in voltage fluctuations
• carry out assessments of disturbing equipment and resultant voltage fluctuations
• measure voltage fluctuations caused by disturbing equipment for the purpose of checking conformance with requirements and limits in EREC P28.

This Distribution Code public consultation is seeking the views from industry stakeholders on the proposed modification to Engineering Recommendation P28, subsequently referred to as EREC P28 Issue 2.

This modification has been prepared under the authority of the Distribution Code Review Panel (DCRP) of Great Britain – EREC P28 being a Qualifying Standard and Licence Standard under the Distribution Code[1]. However, given Engineering Recommendation P28 is also referenced within the Grid Code and there is potential for consequent modification of the Grid Code, the views from Grid Code stakeholders are also being sought.

The DCRP establish and maintain governance arrangements for Qualifying Standards that have a material effect on Users of the Distribution System. Annex 1 documents, such as EREC P28, are approved by the Authority (Ofgem) before publication.

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).

[1] http://www.dcode.org.uk/the-gb-distribution-code/

Responses to this consultation should be sent to the Distribution Code Review Panel Secretary at dcode@energynetworks.org by 17:00 Wednesday 31 January 2018 on the pro-formas provided expressly for the purpose. Responses after this date may not be considered.

DCRP/17/06/PC - Revision to Technical Specification 41-24 (TS 41-24) and Engineering Recommendation S34 (EREC S34)

This Distribution Code public consultation is seeking the views from industry stakeholders on the proposed modification to TS 41-24 and EREC S34.

Guidance relating to design, installation, testing and maintenance of main earthing systems in substations and assessing the rise of earth potential at electrical installations will be superseded by the modified TS 41-24 and EREC S34.

The modified TS 41-24 and EREC S34 have been completely re-drafted as a result of the publication of BS EN 50522, “Earthing of power installations exceeding 1 kV a.c.” and the need to update both documents in the light of revised legislation and British Standards. EREC S34 is a more technical supporting document to TS 41-24. The two are extensively cross-referenced and therefore this consultation is for both documents together.

TS 41-24 and EREC S34 are both Annex 1 qualifying standards to the GB Distribution Code and governed by the Distribution Code Review Panel (DCRP). The DCRP establish and maintain governance arrangements for Qualifying Standards that have a material effect on Users of the Distribution System. Annex 1 documents are approved by the Authority (Ofgem) before publication.

Responses to this consultation should be sent to the Distribution Code Review Panel Secretary at dcode@energynetworks.org by 17:00 Friday 26 January 2018 on the pro-formas provided expressly for the purpose. Responses after this date may not be considered.

DCRP/17/05 Public Consultation - GC0079 Frequency Changes during Large Disturbances and their impact on the Total System.

The workgroup recommends the modification of the Distribution and Planning Code, Engineering Recommendations G59 and G83 to ensure that all embedded generators with a commissioning date on or after the date of implementation of these proposals comply with the following:

a) That if rate of change of frequency (RoCoF) protection is used as Loss of Mains protection, the applied setting should be 1Hzs-1 with a definite time delay of 500ms.

b) That all generation (whether using discrete relays or loss of mains techniques included in the overall control scheme for type tested generation) should demonstrate stability for appropriate RoCoF and vector shift disturbances

c) That vector shift protection technique should not be used as Loss of Mains protection.

Responses to this consultation should be sent to the Distribution Code Review Panel Secretary at dcode@energynetworks.org by 17:00 Friday 1 September 2017 on the pro-forma provided expressly for the purpose. Responses after this date may not be considered.