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


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 …


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 …



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)



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 … ?



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.



Prof. Newbury, Open University, UK• Emission measurements in Scotland (Crieff & Stonehaven)

0,00

5,00

10,00

15,00

20,00

25,00

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)


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


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


• 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


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


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



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



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



Mains

2.67m

3m

2.67m

H 80cm

Second configuration : U network (with PLC)

Laptop


Laptop


• 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




Second configuration : step 1

Without communication With communication

Noise floor in the lab


Mains

2.67m

3m

2.67m

H 80cm


Laptop


Laptop

C1 on T.G.



• C1 to T.G. (-20dBm)





Mains

2.67m

3m

2.67m

H 80cm


Laptop


LaptopC2 on ESI



• C2 to receiver




Mains

2.67m

3m

2.67m

H 80cm


Laptop


LaptopClamp


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


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)


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)



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.



[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.


= Max. reachable level(limited by our amplifier)

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

Documents

radiated emission

jta2 stsmsprof

emc plc stsms

uk emission measurements

plc modem usedcost

operated plc system

uk cost

open university