Report prepared by Alan Dick
Technical Committee 13 of the International Electrotechnical Commission (IEC) met on 7 and 8 October 2008 in Poitiers, France. TC13 is concerned with standards for electricity meters and associated equipment. Its Chairman is Dr. Bernd Schulz (Germany) and its Secretary is Gyozo Kmethy (Hungary). Meetings are held at three to four yearly intervals to review progress and to set a future work programme.
Dr. Schulz opened the meeting by referring to the changing background against which TC13 was working. Since the last TC13 meeting in 2005, these included, amongst other things:
- Procurement continues to become more international as large utilities operate in several countries following deregulation
- The latest situation with the world economy may affect investment in infrastructures and also lead to downward pressures on product prices. This latter must not affect product quality
- Environmental issues and the need to conserve energy continue to be important. Metering is seen as a useful tool in influencing customer demand
- Many countries are considering introducing ‘smart’ meters and TC13 will need to consider what new standards may be required in support. Also a new buzz term in this context was ‘smart grids’
- As regards Europe, the EU has been enlarged creating a larger market. Deregulation has not proceeded as fast as expected and clarification is still needed about metering responsibilities in some Member States.
The standards produced by TC13 must serve the needs of parties having to react to these changes and to technology developments generally.
TC13 has four active Working Groups and two Project Teams (dealing respectively with Safety and Reactive static meters)
WG 11 is concerned with standards for meter products including test criteria. Convenor Bruno Ricciardi (Switzerland) reported that work to migrate to the new IEC 62052/3 series was largely complete. New standards since 2005 were:
- 62053-52 (Symbols)
- 62058-11, 21 and 31 (Acceptance inspection)
- 62052-31 (Safety)
- 62053-24 (Static meters for reactive energy of Class 1 and 0.5)
The first and second were now published. The last two were being dealt with by Project Teams, which was a new IEC concept (see later). Also a new work proposal had been raised for revision of IEC 60736 (Test Equipment), to be 62057-11 in the new series.
As regards the safety standard, work had progressed and it was hoped that a CD would be available for circulation in December 2008. This would follow the format of IEC 61010 (General equipment safety) although it had been agreed that electricity meters would not be subject to this generic standard if a representative of the TC66 committee dealing with 61010 acted as liaison with TC13. Kris Szajdicki was present at the Plenary in this capacity. There had been some discussion as to whether meters should remain with Class III creepage and clearance protection or should comply with 61010’s Class IV, but it was agreed that TC13 could set the required level. Following agreement to this new standard, safety requirements in the product standards 62052-11 and 62053- 11 and -21 would need to be reviewed and relevant sections had, in fact, been identified in document 13/1446/INF.
As regards static reactive meters, a previous proposal for new work in 2004 had expired before anything had been done. However, a further NWP had been issued this year and it was expected that this would receive a positive vote. Sweden had offered to provide a Convenor.
As regards test equipment, the result of the NWP vote – which closed on 15/08 – was not yet known. A draft of a proposal for Parts 1 and 2 (Stationary test systems and Portable test systems) was available but only in German. India asked to submit a proposal but was told that they needed to nominate an expert to any new group set up.
WG13 is concerned with dependability (reliability) aspects of meters. Convenor Jacques Talbot (France) reported that work had progressed on the IEC 62059 series of standards, as follows:
- Parts -11 and –12 (General concepts and Collection of field data) were published
- Part -31-1 (Accelerated reliability testing) was at FDIS stage
- Part -31-2 (Testing of metrological stability) was at CD stage
- Part -41 (Reliability prediction) was published
- Part –51 (Software aspects of reliability) had not been started.
Jacques reported that a practical test of Part –31-1 had been carried out on an EDF meter in production for 10 years, and the results of predicted life were in accord with practical experience. Part -31-2 applied only to Europe as it was intended as a test which would give a reasonable level of confidence as regards the Durability requirements of the Measuring Instruments Directive (MID). Part –51 would take account of the WELMEC Guide 7.2 and the next step was to produce a NWP.
WG 14 is concerned with communications for metering, tariff and load control. Convenor Thomas Schaub (Switzerland) reported on the status of the 62056 series, which were published documents maintained though a Type D liaison by the DLMS User Association. WG14 dealt with data modelling as well as data exchange. As regards the former, these were standards for ‘OBIS’ and interface classes: as regards the latter, various implementations of DLMS over differing physical layers had been defined, including use of TCP/IP protocols. Additionally IEC 62056-21 (Direct local data exchange – formerly IEC 1107) had been modified to allow switching to DLMS. Future work included:
- Review of security aspects (authentication and encryption) of DLMS, following work being done on communications security elsewhere in IEC
- Definition of additional application models to cover possible smart metering requirements
- Cooperation with TC57 (Standards for Distribution Automation) to allow interfacing of DLMS to ‘smart Grids’ applications.
As regards the last, a meeting had been scheduled between representatives of TC13 and TC57.
WG15 is concerned with payment (prepayment) systems. Convenor Bob Loe (UK) reported that the status of the 62055 series was:
- Part -11 (Glossary) had not been published
- Parts -21 and -31 (Framework and Particular requirements Class 1and 2 static meters) had been published
- Parts –41 and –51 (Standard Transfer Specification) had been progressed through the South African STS Association in type D liaison
- Parts –41 and –51 had not been parallel voted in CENELEC as the ‘token’ system (energy based rather than monetary based) did not apply in Europe.
A NWP had been circulated for 62055-32 (Multi-part payment metering systems) and positive voting was expected. It was intended to produce a CD by May 2009. There was some discussion of the relationship of this to smart metering – it could be thought of as a sub-set of smart metering functionality.
It was reported that many countries are considering implementation of so-called ‘smart meters’ and there was discussion of what the role of TC13 might be as regards standards for these. There are some existing standards of relevance, particularly referring to the DLMS communications protocol (IEC 62056 series) which was designed to accommodate a range of typical smart meter functions. Gyozo Kmethy drew attention to a Dutch specification (NTA 8130) for a smart metering system which used DLMS and M-bus as communications protocols. This included functions such as firmware update, remote disconnection, load limiting and 128-bit encryption, areas where the DLMS COSEM standards – interface standards and OBIS codes – may need to be updated. It was agreed that the DLMS User Association (see below) would keep abreast of developments in this area.
TC13 liaises with several other IEC TCs and other bodies relevant to its work, and some presentations were made to indicate implications of the following:
- IEC TC8 (System aspects of electricity supply) and TC56 (Dependability) where new cooperative links were needed (no actual reports were received)
- IEC TC66 (Group safety of electrical equipment) which has agreed that TC13 can produce a product safety standard related to IEC 61010 (see WG11 report above)
- IEC TC57 (Communications for network control) where there was a need to define interfaces between SCADAtype systems and AMR control stations
- IEC TC38 (Instrument transformers) where Pascal Tantin (FR) could act as liaison member
- The DLMS User Association which would maintain DLMS standards and handle matters such as user registration and conformity assessment
- The Standard Transfer System Association which would do likewise for the South African PAS related standards
- OIML where work on revision of IR46 (Electricity meters) appeared to have stalled
- EURELECTRIC (Association of the European Utilities) which had an expert group concerned with metering standardisation.
Summary of ongoing and new work for TC13
|WG11||Prepare IEC 62053-24 (Static reactive energy meters Class 1 and 0.5)
Progress work on IEC 62052-31 (Safety) to CD stage and beyond
Review IECs 62052-11 and 62053–11 and –21 (take out safety aspects once Part –31
Progress revision of IEC 60736 (Test equipment) to be IEC 62057-11
|WG13||Complete IEC 62059-31-1 (Accelerated reliability testing)
Complete IEC 62059-31-2 (Durability test)
Progress IEC 62059-51 (Software)
|WG14 (to be done by the DLMS User Association)||Liaise with TC57 regarding object models
Consider security aspects of DLMS
Extend object models to cover smart meter applications
|WG15||Progress IEC 62055-32 (Multi-part payment systems)|
|Liaison||Intensify cooperation with IEC TC57|
|General||Revise the Strategic Policy Statement
Update the TC13 Work Program
CHANGES IN IEC
On behalf of IEC Central Office, Gyozo Kmethy indicated changes in IEC organisation and procedures over the last 3 years. These were aimed both at assisting experts involved in standards production and speeding up the process and included:
- An option to add comment files to an FDIS vote was to be stopped
- There was new use of Project Teams as an alternative to Working Groups (PTs disbanded once work complete)
- CDVs which have no negative votes can go straight to publication (skipping FDIS stage)
- Revised IEC web site with 100% electronic support and on-line access to the International Electrotechnical Vocabulary (as to what is defined)
- National conditions in Forewords or Informative Annexes (“in some countries….”) were permitted and could include transitional arrangements.
STRATEGIC POLICY STATEMENT/WORK PROGRAMME
TC13 (as with other TCs) is required to issue and periodically update a Strategic Policy Statement which sets out their scope, the background within which they operate and their work programme. There was discussion of a proposed update to this Statement, and comments made by members would be taken into account by the Secretary in producing a revised version. The proposed ongoing and new work would be used to update the IEC database (summarised as in following Table).
It was agreed that the next meeting should be in 2010, date and location to be confirmed.
CD Committee Draft
CDV Committee Draft for Voting
FDIS Final Draft International Standard
NWP New Work Proposal
WELMEC Western European Legal Metrology Cooperation
OIML International Legal Metrology Organisation