DCRP/MP/19/03: - EREC G5 Issue 5

What is being proposed

StatusProposerThe Distribution Code Review Panel - www.dcode@energynetworks.org020 7706 5105SummaryENA Engineering Recommendation (EREC) G5 is an Annex 1 document to the Distribution Code which defines planning levels and compatibility levels for the assessment of voltage distortion from Network User’s equipment and installations with harmonic emission to be connected to transmission systems and distribution networks in the United Kingdom.In June 2010 a National Grid initiated a review of the existing ER G5/4-1 standard under Distribution Code Review Panel (DCRP) paper DCRP_10_02_07 (Appendix 1 of the RTA). The key drivers National Grid highlighted for requiring review of EREC G5 were:The DCRP agreed to the establishment of a joint DCRP/GCRP Working Group which was formally kicked off in October 2010 under GC0036. The Terms of Reference of the original GC0036 working group is detailed in Appendix 2 of the RTA. In 2017, the Grid Code Review Panel (GCRP) governance procedures were revised. A decision was taken by the working group to continue the review work under a DCRP governed Working Group DC0036. The revised Terms of Reference and the Working Group membership are detailed in Appendices 3 and 4 of the RTA respectively.The proposed modification of EREC G5 has been written in response to the review work undertaken by the Working Group. The main issues the revision working group sought to consider were:ImpactConsultationOn 13th March 2019 the DCRP formally opened up a public consultation DCRP/PC/19/03 on the proposed draft of EREC G5 Issue 5. The deadline for responses was 19th March 2019. Due to the Easter holiday period, the consultation closure was extended to 26th April 2019. The consultation material is presented in Appendix 5 of the RTA.11 responses from the public consultation were received by stakeholders which are summarised in Appendices 6 and 7 of the RTA. The commentary on the draft EREC G5 Issue 5 is addressed in Appendix 7 of the RTA whilst the stakeholder commentary on the consultation questions has been addressed in Appendix 6 of the RTA. Appendix 9 of the RTA tracks the changes made to EREC G5 Issue 5 since public consultation.Overall the responses were supportive of the proposed changes with mainly editorial and minor technical recommendations to be made to the draft EREC G5 Issue 5 to add clarity to users. One significantly piece of feedback from one stakeholder was the objection to the revised approach to the apportionment of harmonic headroom. Appendix 10 of the RTA details the rationale behind the revised approach and the working group are comfortable the revised approach aligns with the distribution code objectives.Further detail of this public consultation can be found on the DCode website under DCRP/19/03/PC Consultation PackAuthority Decision

Details

Analysis

Distribution Code code modification. See the codes page for full details.