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Budapest University of Technology and Economics Faculty of Electrical Engineering and Informatics

Budapest University of Technology and Economics Faculty of Electrical Engineering and Informatics Department of Electric Power Engineering Power Systems and Environment Group. György VARJÚ, professor János LÖCHER, PhD student. Introduction.

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Budapest University of Technology and Economics Faculty of Electrical Engineering and Informatics

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  1. Budapest University of Technology and Economics Faculty of Electrical Engineering and Informatics Department of Electric Power Engineering Power Systems and Environment Group György VARJÚ, professor János LÖCHER, PhD student Cost 286 Wroclav 17-18/09/2003

  2. Introduction PLT application in open wire insulated LV power line Laboratory investigations - Introducing used PLT devices - Presenting of our PLT Laboratory - Used disturbance sources - Laboratory tests - Conclusions - “Some Strange Result” Cost 286 Wroclav 17-18/09/2003

  3. Devices (1/4): CPE (modems) Ilevo CPE LR 100 Properties: • 45/36 Mbps data transfer rate • up to 400 m coverage • Ethernet & USB connection • Configurable via SNMP • Data and VOIP services Cost 286 Wroclav 17-18/09/2003

  4. Devices (2/4): TPE Ilevo CPE LR 1000 Properties: • 45/36 Mbps data transfer rate • up to 400 m coverage • up to 63 CPE’s or IR’s • Ethernet & RS232 connection • Configurable via SNMP • Data and VOIP services Cost 286 Wroclav 17-18/09/2003

  5. Devices (3/4): Repeater Ilevo CPE LR 1100 Properties: • 45/36 Mbps data transfer rate • up to 400 m coverage • up to 63 client CPE’s • Ethernet & RS232 connection • Configurable via SNMP • Data and VOIP services Cost 286 Wroclav 17-18/09/2003

  6. Devices (4/4): Common features Based on DS2 technology • OFDM modulation • max. 768 carrier downstream • max. 512 carrier upstream • Programmable carrier power profile • Continuous channel SNR monitoring • Adaptive bit rate adjustment • 4 frequency bands: 2-4.5 MHz • 5.6-8.1 MHz • 10-12.5 MHz • 15-17.5 MHz Cost 286 Wroclav 17-18/09/2003

  7. Laboratory (1/4) • Rack system: • Four layered vertical rack system with spacing 40 cm • Rectangular layout, perimeter 30 m each • 14 winds 4x95+25mm2 AASC cable (420 m full length) • Both-end access at the measuring room • Accessible at each corner for connection Cost 286 Wroclav 17-18/09/2003

  8. Laboratory (2/4) Corners Rack system Cost 286 Wroclav 17-18/09/2003

  9. Laboratory (3/4) Connections Cost 286 Wroclav 17-18/09/2003

  10. Laboratory (4/4) Cost 286 Wroclav 17-18/09/2003

  11. Source of disturbance - 3phase fluorescent lamps - Drill with speed regulator - Compact fluorescent lamps (1phase) - Normal incandescent lamps with dimmer Cost 286 Wroclav 17-18/09/2003

  12. Measurement Configuration (1) TPE - Repeater path Cable length: 420 m Signal injection: Phase - Neutral Signal detection: Phase - Neutral Cost 286 Wroclav 17-18/09/2003

  13. Measurement Configuration (1) Results: Upload: 694 kByte/s @ 16 MHz Download: 418 kByte/s @ 11 MHz Upload: 285 kByte/s @ 11 MHz Download: 446 kByte/s @ 16 MHz Cost 286 Wroclav 17-18/09/2003

  14. Measurement Configuration (2) TPE - Repeater - CPE path Cable length: 420 m Signal injection: Phase - Neutral Signal detection: Phase - Neutral Cost 286 Wroclav 17-18/09/2003

  15. Measurement Configuration (2) Results: Upload: 359 kByte/s @ 16/7 MHz Download: 174 kByte/s @ 11/3 MHz Upload: 213 kByte/s @ 11/3 MHz Download: 162 kByte/s @ 16/7 MHz Cost 286 Wroclav 17-18/09/2003

  16. Measurement Configuration (3) TPE - Repeater - CPE path Cable length: 420 + 30 m Signal injection: Phase - Phase Signal detection: Phase - Neutral Cost 286 Wroclav 17-18/09/2003

  17. Measurement Configuration (3) Results: Upload: 792 kByte/s @ 16/7 MHz Download: 173 kByte/s @ 11/3 MHz Upload: 306 kByte/s @ 11/3 MHz Download: 175 kByte/s @ 16/7 MHz Cost 286 Wroclav 17-18/09/2003

  18. Some geography First written record from 1229. Area: 48,5 km2 (include agricultural) Population: 1200 Cost 286 Wroclav 17-18/09/2003

  19. Pictures from Bárdudvarnok Cost 286 Wroclav 17-18/09/2003

  20. Bárdudvarnok Cost 286 Wroclav 17-18/09/2003

  21. Measurement Configuration (4) U: 526 kByte/s D: 330 kByte/s U: 501 kByte/s D: 234 kByte/s U: 193 kByte/s D: 200 kByte/s U: 230 kByte/s D: 148 kByte/s U: 11 MHZ D: 16 MHz Cost 286 Wroclav 17-18/09/2003

  22. Conclusions These devices worked well during laboratory tests The real net behaviour is unknown More tests are needed, focused especially on capacitor banks for reactive power compensation Cost 286 Wroclav 17-18/09/2003

  23. Strange Result During the tests we have experienced some strange things, and we examined their source This is not belonging to the normal PLT operation, but it was worthy to investigate them. Cost 286 Wroclav 17-18/09/2003

  24. „Wireless” PLT Attenuation 20dB @ 7MHz 25dB @ 16MHZ 30dB @ 3MHz 40dB @ 11MHZ Upload: 340 kByte/s @ 3MHz Download: 550 kByte/s @ 7MHz Upload: 520 kByte/s @ 11MHz Download: 766 kByte/s @ 16MHz Cost 286 Wroclav 17-18/09/2003

  25. Disturbance of CF lamps (1/2) Conducted disturbances Test with two class of compact fluorescent lamps: - Low quality (cheap) lamps stopped the communication, although all of them have CE sign - High quality (more expensive) lamps never produced this effect) Cost 286 Wroclav 17-18/09/2003

  26. Disturbance of CF lamps (2/2) Cost 286 Wroclav 17-18/09/2003

  27. Thank you for your attention! Any questions? Cost 286 Wroclav 17-18/09/2003

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