COST 286 - JTA 2 - EMC analysis of LF unstructured telecom networks Ir. V.Beauvois
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Transcript of COST 286 - JTA 2 - EMC analysis of LF unstructured telecom networks Ir. V.Beauvois
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([email protected])
University of Liège, Belgium
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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 & workshopsCost 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 …
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Cost 286 – JTA2 & STSMs
Prof. Catrysse, Oostende, BelgiumProf. Heyno Garbe & Sven Batterman, Hannover, GermanyProf. 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-onescale LV network (BME laboratory)… this week …
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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)
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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 … ?
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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 byDM and CM Z, cable-length, type of wiring, height above groundplane, 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.
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Cost 286 – JTA2 & STSMs
Prof. Newbury, Open University, UK• Emission measurements in Scotland (Crieff & Stonehaven)
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2 2,4 4,8 5,3 7,5 8,3 8,4 10 12,4 15,4 18,4 21,4 24,5 27,9 30
frequency (MHz)
day
night
previous Scottish levels (90% conf maxima)
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JTA 2 – EMC analysis of LF unstructured telecom networks
Preliminary results on a PLCU network (emission & immunity)
Ir. V.Beauvois([email protected])
Thanks to Pierre and our students
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Mains or not
2.67m
3m
2.67m
H 80cm
Initial configuration : U network (no PLC)
C2 to ReceiverC1 on T.G.
A set of 3 power cords for a total length of 8.34m
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• EMI receiver ESI 26 R&S (20Hz-26GHz)receiver modemeasurements between 1-30MHzBW 9kHzfrequency step 6kHzPk & Avg detectorswith T.G.
• Loop antenna HFH2-Z2 R&S
• Coupling devices C1 & C2 (provided by the Open University, UK)
Initial configuration : measurement equipments
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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
Initial configuration : step 1
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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
Initial configuration : step 2
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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
Initial configuration : step 3
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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
Initial configuration : step 4
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Mains
2.67m
3m
2.67m
H 80cm
Second configuration : U network (with PLC)
Laptop
A set of 3 power cords for a total length of 8.34m
Laptop
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• EMI receiver ESI 26 R&S (20Hz-26GHz)receiver modemeasurements between 1-30MHzBW 9kHzfrequency step 6kHzPk & Avg detectorswith 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
Second configuration : measurement equipments
ULg - EMC Lab Budapest - 2006 Oct 17 - JTA2 - Cost 286 17
Active network : connected to power mains of the building
• Loop antenna to receiver
Second configuration : step 1
Without communication With communication
Noise floor in the lab
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Mains
2.67m
3m
2.67m
H 80cm
Second configuration : U network (with PLC)
Laptop
A set of 3 power cords for a total length of 8.34m
Laptop
C1 on T.G.
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Active network : connected to power mains of the building
• C1 to T.G. (-20dBm)
• Loop antenna to receiver
Second configuration : step 2
Without communication With communication
ULg - EMC Lab Budapest - 2006 Oct 17 - JTA2 - Cost 286 20
Mains
2.67m
3m
2.67m
H 80cm
Second configuration : U network (with PLC)
Laptop
A set of 3 power cords for a total length of 8.34m
LaptopC2 on ESI
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Active network : connected to power mains of the building
• C2 to receiver
Second configuration : step 3
Without communication With communication
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Mains
2.67m
3m
2.67m
H 80cm
Second configuration : U network (with PLC)
Laptop
A set of 3 power cords for a total length of 8.34m
LaptopClamp
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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
Second configuration : immunity equipments
IEC 61000-4-4
IEC 61000-4-6
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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 (%
)
Second configuration : Immunity (1)
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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)
Non received packets (%
)
0
100
400 560 1000Injected level (V)
Second configuration : Immunity (2)
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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 overand the transfer is interrupted.
Second configuration : Immunity (3)
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[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 isnot 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.
Second configuration : Immunity (4)
= Max. reachable level(limited by our amplifier)