Transcript COST 286 - Applied Electromagnetics Lab

COST 286 - JTA 2 - EMC analysis of
LF unstructured telecom networks
Ir. V.Beauvois
([email protected])
University of Liège, Belgium
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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 …
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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 …
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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)
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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 … ?
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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.
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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Cost 286 – JTA2 & STSMs
Prof. Newbury, Open University, UK
• Emission measurements in Scotland (Crieff & Stonehaven)
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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JTA 2 – EMC analysis of LF
unstructured telecom networks
Preliminary results on a PLC
U network (emission & immunity)
Ir. V.Beauvois
([email protected])
Thanks to Pierre and our students
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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)
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
15
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
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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Second configuration : step 1
Active network : connected to power mains of the building
• Loop antenna to receiver
Noise floor in the lab
Without communication
ULg - EMC Lab
With communication
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
18
Second configuration : step 2
Active network : connected to power mains of the building
• C1 to T.G. (-20dBm)
• Loop antenna to receiver
Without communication
ULg - EMC Lab
With communication
Budapest - 2006 Oct 17 - JTA2 - Cost 286
19
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
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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Second configuration : step 3
Active network : connected to power mains of the building
• C2 to receiver
Without communication
ULg - EMC Lab
With communication
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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 (%)
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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
ULg - EMC Lab
560
Injected level (V)
Budapest - 2006 Oct 17 - JTA2 - Cost 286
1000
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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.
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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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)
ULg - EMC Lab
Budapest - 2006 Oct 17 - JTA2 - Cost 286
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