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COST 286 - JTA 2 - EMC analysis of LF unstructured telecom networks Ir. V.Beauvois

COST 286 - JTA 2 - EMC analysis of LF unstructured telecom networks Ir. V.Beauvois (V.Beauvois@ulg.ac.be) University of Liège, Belgium. Cost 286 – JTAs. Cost Action to unify people in Europe working on the same subject no fund except for traveling and organizing meetings & workshops

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COST 286 - JTA 2 - EMC analysis of LF unstructured telecom networks Ir. V.Beauvois

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  1. COST 286 - JTA 2 - EMC analysis of LF unstructured telecom networks Ir. V.Beauvois (V.Beauvois@ulg.ac.be) University of Liège, Belgium

  2. Cost 286 – JTAs • Cost Action • to unify people in Europe working on the same subject • no fund except for traveling and organizing meetings & workshops • Cost 286 • EMC aspects of diffused communication systems • PLC is one of the subject • JTA : Joint Technical Actions • JTA2 : EMC & PLC • STSMs : short term scientific missions • Prof. Catrysse, Oostende, Belgium • Prof. Heyno Garbe & Sven Batterman, Hannover, Germany • Prof. Varju, Budapest, Hungary • Prof. Feran Silva, Barcelona, Spain • Prof. Newbury, Open University, UK …

  3. Cost 286 – JTA2 & STSMs • Prof. Catrysse, Oostende, Belgium • Prof. Heyno Garbe & Sven Batterman, Hannover, Germany • Prof. Feran Silva, Barcelona, Spain • Emission of PLC & methods of measurement • (radiated, LCL, AMN, MDF…) • Prof. Newbury, Open University, UK • Emission measurements in Scotland • Prof. Varju, Budapest, Hungary • Emission of PLC & methods of measurement on one-to-one • scale LV network (BME laboratory) • … this week …

  4. Cost 286 – JTA2 & STSMs • Prof. Catrysse, Oostende, Belgium • Emission of PLC & methods of measurement • CISPR/I/PLT framework • (1) Radiated emission by an operated PLC system in situ • (related to the quality of the network and the PLC modem used)

  5. Cost 286 – JTA2 & STSMs • Prof. Catrysse, Oostende, Belgium • Emission of PLC & methods of measurement • (2) How to characterize the power mains network itself ? Unbalance ? • with LISN, LCL or MDF or … ?

  6. Cost 286 – JTA2 & STSMs • Prof. Catrysse, Oostende, Belgium • Emission of PLC & methods of measurement • (3) A PLC modem should be CE (EMC and RTTE directives) • to characterize with a well defined power mains reference network • (“artificial” power mains network needed and described by • DM and CM Z, cable-length, type of wiring, height above ground • plane, K-factor of this wiring, LCL and/or MDF) • To measure : radiated H-field, LCL and/or MDF of the unit, • conducted emission on the mains wiring using a LISN-like setup.

  7. Cost 286 – JTA2 & STSMs • Prof. Newbury, Open University, UK • Emission measurements in Scotland (Crieff & Stonehaven)

  8. JTA 2 – EMC analysis of LF unstructured telecom networks Preliminary results on a PLC U network (emission & immunity) Ir. V.Beauvois (V.Beauvois@ulg.ac.be) Thanks to Pierre and our students

  9. Initial configuration : U network (no PLC) Mains or not C1 on T.G. C2 to Receiver 2.67m 2.67m 3m H 80cm A set of 3 power cords for a total length of 8.34m

  10. Initial configuration : measurement equipments • EMI receiver ESI 26 R&S (20Hz-26GHz) • receiver mode • measurements between 1-30MHz • BW 9kHz • frequency step 6kHz • Pk & Avg detectors • with T.G. • Loop antenna HFH2-Z2 R&S • Coupling devices C1 & C2 (provided by the Open University, UK)

  11. Initial configuration : step 1 • Passive network : not connected to power mains of the building • C1 & C2 at each end of the U network • C2 to ESI receiver (Peak detector) • if C1 is not connected – green curve • if C1 to ESI T.G. (-20dBm) – blue curve

  12. Initial configuration : step 2 • Active network : connected to power mains of the building • C1 & C2 at each end of the U network • C2 to receiver (Peak detector) • if C1 is not connected – green curve • if C1 to T.G. (-20dBm) – blue curve

  13. Initial configuration : step 3 • Passive network : not connected to power mains of the building • C1 to T.G. (-20dBm) • Loop antenna to receiver • Influence of loop orientation • perpendicular to U base at 1m – green curve • parallel to U base at 1m– blue curve

  14. Initial configuration : step 4 • Passive or Active networks: • not or connected to power mains of the building • C1 to T.G. (-20dBm) • Loop antenna to receiver, • parallel to U base at 1m • Influence of power mains • active network – green curve • passive network – blue curve

  15. Second configuration : U network (with PLC) Mains Laptop 2.67m 2.67m Laptop 3m H 80cm A set of 3 power cords for a total length of 8.34m

  16. Second configuration : measurement equipments • EMI receiver ESI 26 R&S (20Hz-26GHz) • receiver mode • measurements between 1-30MHz • BW 9kHz • frequency step 6kHz • Pk & Avg detectors • with T.G. • Loop antenna HFH2-Z2 R&S • Coupling devices C1 & C2 (provided by the Open University, UK) • Powerlan 100 kit Topcom • 2 laptops on batteries

  17. Second configuration : step 1 • Active network : connected to power mains of the building • Loop antenna to receiver Noise floor in the lab Without communication With communication

  18. Second configuration : U network (with PLC) Mains Laptop C1 on T.G. 2.67m 2.67m Laptop 3m H 80cm A set of 3 power cords for a total length of 8.34m

  19. Second configuration : step 2 • Active network : connected to power mains of the building • C1 to T.G. (-20dBm) • Loop antenna to receiver Without communication With communication

  20. Second configuration : U network (with PLC) Mains Laptop 2.67m 2.67m Laptop C2 on ESI 3m H 80cm A set of 3 power cords for a total length of 8.34m

  21. Second configuration : step 3 • Active network : connected to power mains of the building • C2 to receiver Without communication With communication

  22. Second configuration : U network (with PLC) Mains Laptop 2.67m 2.67m Laptop Clamp 3m H 80cm A set of 3 power cords for a total length of 8.34m

  23. Second configuration : immunity equipments • Immunity similar to: • IEC 61000-4-4 : Burst generator EM TEST UCS500 & capacitive clamp • IEC 61000-4-6 : SMY generator + amplifier + EM clamp • 1st time : 150kHz-80MHz with and without AM • 2nd time : 4MHz-21MHz with and without AM • Powerlan 100 kit Topcom • 2 laptops on batteries IEC 61000-4-4 IEC 61000-4-6

  24. Second configuration : Immunity (1) • Burst signals are applied after the ping communication is launched. • Burst during 15ms with a period of 300ms (as in IEC 61000-4-4) • Voltage level is increased progressively • Above a certain voltage level (580V): 50% of the pings are still received • related to the long period without burst … Non received packets (%)

  25. Second configuration : Immunity (2) • Burst signals are applied after the ping communication is launched. • Burst during 15ms with a period of 15ms (as continuously present) • Voltage level is increased progressively • Above a certain voltage level (560V) : on/off mode (off, reboot necessary) 100 Non received packets (%) 0 400 560 1000 Injected level (V)

  26. Second configuration : Immunity (3) • Burst signals are applied after the beginning of a very big file sending. • Burst during 15ms with a period of 300ms • Voltage level is increased progressively • Above a certain voltage level (580V) : the communication is down. • Burst during 15ms with a period of 15ms (as continuously present) • Voltage level is increased progressively • Above a certain voltage level (580V) : the communication slows down, • then the PC is waiting indefinitely until the delay is over • and the transfer is interrupted.

  27. Second configuration : Immunity (4) • [IEC 61000-4-6] • limited to 4-21MHz (related to the used PLC band), step 500kHz, dwell time 5s (5 pings). • without AM 1kHz : voltage level is increased progressively, the communication is • not disturbed or disturbed for a higher level (10-20V)than with AM. • with AM 1kHz : voltage level is increased progressively (largely over 10V), • the communication is on, and then off (0-100% mode). • the level needed to disturb is high because the OFDM modulation is secure. = Max. reachable level (limited by our amplifier)

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