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Mains Signalling Project Proposal for Electricity Meters Disturbance Investigation

This project proposal by Jan Welinder from SP Swedish National Testing and Research Institute focuses on investigating disturbance problems arising from using mains for data transfer from electricity meters in the frequency range of 3–148 kHz. The project aims to identify, simulate, and provide solutions for these disturbances, exploring alternative technologies when needed. The research includes reports on current usage experiences, source characterization, simulation models, and installation suggestions. Development of measurement technology, network, procedures, and analysis methods are key project components to enhance mains signaling practices.

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Mains Signalling Project Proposal for Electricity Meters Disturbance Investigation

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  1. Signalling on the mainsa project proposal Jan Welinder SP Swedish National Testing and Research Institute + 46 33 165171 jan.welinder@sp.se

  2. SP Elektronics: EMC/Radio • Testing • EMC • Radio • HF • R&D • Numerical methods • Antenna technology • Measurement techn.

  3. Background • Monthly electricity bills (new Swedish law): • Several technologies: • Short distance radio • GSM • Modem • Optofibre • Special systems • Mains • Project KFM (Nätverk- och Kunskapsplats för Elmät) • Electricity meters and EMC at SP

  4. Standards • Mains signalling is standardized: EN 50065-series • (parts harmonized under LVD and EMCD) • Standards define: • Frequency bands (3 – 148,5 kHz) • Levels • EMC • Filters • Access rules

  5. Conducted disturbances Mains quality - 2 kHz Radio 150 kHz -

  6. Allowed levels

  7. Real environmet Read out Disturbances Meter Signal attenuation

  8. Disturbances – office (frequency domain)

  9. Frequency domain • Detectors • Peak max value (poor relation to digital signals) • Quasi peak “low pass” (poor relation to digital signals) • Average somewhat better • RMS good for white noise • APD amplitude statistics (related to BER) • No simple relations between frequency domain measurements and communication problems

  10. Technology status Mains signalling is commercial technology Echelon PLT-31xx

  11. Project description • Investigation of disturbance problems when using the mains for data transfer from electricity meters using the frequency range 3 – 148 kHz • Questions: • What are problems do exist? • When and why do they occur? • When should alternative technologies be used? • Can anything be done when disturbances occur? • Will disturbances come after installations when new installations are done?

  12. Project description • Objectives • Reports on: • Experiences from current use • Characterization of sources • Models for simulation • Advice for installations

  13. Project description • Measurement technology • Development of a measurement network • Development of measurement procedures • Amplitude statistics or traditional measurements? • Time domain and/or frequency domain? • Measurements in real installations • Lab measurements on sources

  14. Project description • Method – simulation/prediction • Development of methods to use existing simulations tools for analysis of mains net communication • A tool for computer analysis and prediction of the behaviour of installations and products

  15. Simulations - EMEC

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