MP165 ESME Voltage Accuracy

Proposer Alan Creighton (Northern Powergrid)
Lead Analyst Ben Giblin
Date raised 27/05/2021
StageRefinement Process
Implementation date Not yet determined
Latest update The Proposer is working with a number of industry bodies to develop the business case for this modification. Once this is completed, SECAS will open the Refinement Consultation.

What is the issue?

Electricity Network Parties have a statutory obligation to ensure that the voltage supplied to consumers premises supplied from low voltage electricity networks is between defined limits at all times. They currently do this by making planning assumptions when low voltage networks are designed.
During the development of the smart meter technical specification, Electricity Network Parties requested that the average Root Mean Square (RMS) voltage readings from ESMEs would be recorded with a mandated level of accuracy. Such a requirement is not currently codified in the Smart Metering Equipment Technical Specifications (SMETS) or the Great Britain Companion Specification (GBCS).
The uncertainty associated with the lack of a mandated level of accuracy means that Electricity Network Parties must take conservative planning assumptions when designing and analysing performance of low voltage networks of, thereby preventing them from realising the full benefits from the smart meter rollout.

Who is impacted?

Electricity Network Parties
Other SEC Parties

What SEC documents are affected?

Schedule 9 ‘Smart Metering Equipment Technical Specifications’

Timeline

27 May 2021
Draft Proposal raised
29 Jun 2021
Presented to CSC
02 Aug 2021
Discussed at Operations Group
05 Aug 2021
Discussed at TABASC

Modification documents

MP165 September 2023 SEC Working Group summary
19/09/2023
MP165 June 2022 Working Group summary
15/06/2022
MP165 request for information
25/04/2022
DP165 Modification Report v0.3
27/05/2021
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