ULg - EMC Lab Budapest - 2006 Oct 17 - JTA2 - Cost 286

1
COST 286 - JTA 2 - EMC analysis of LF
unstructured telecom networks Ir.
V.Beauvois (V.Beauvois_at_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_at_
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 RS (20Hz-26GHz)
• receiver mode
• measurements between 1-30MHz
• BW 9kHz
• frequency step 6kHz
• Pk Avg detectors
• with T.G.
• Loop antenna HFH2-Z2 RS
• 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 RS (20Hz-26GHz)
• receiver mode
• measurements between 1-30MHz
• BW 9kHz
• frequency step 6kHz
• Pk Avg detectors
• with T.G.
• Loop antenna HFH2-Z2 RS
• 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
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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.

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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)