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BUTE Part 1 Conducted and radiated disturbance regulations for PLC devices - PowerPoint PPT Presentation


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BUTE Part 1 Conducted and radiated disturbance regulations for PLC devices. BUTE Part 2 Site Trial using the low voltage feeder of RBS sited on HV power line tower. EPFL Part 3 Mitigation of electromagnetic field radiated by PLC systems (in indoor environment).

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BUTE Part 1

Conducted and radiated disturbance regulations for PLC devices

BUTE Part 2

Site Trial using the low voltage feeder

of RBS sited on HV power line tower

EPFL Part 3

Mitigation of electromagnetic field radiated by PLC systems

(in indoor environment)

János Löcher; György Varjú

BUTE

EPFL

COST286 meeting Barcelona 14/15 April 2005


BUTE Part 1

Conducted and radiated disturbance regulations for PLC devices

COST286 meeting Barcelona 14/15 April 2005


IEC-61000-3-8

Signaling on low voltage electrical installations

 Limits of mains terminal interference voltage

 No radiated interference limits apply below 30 MHz

COST286 meeting Barcelona 14/15 April 2005


CLC/prTS50437:2004

Draft Technical Specification for electromagnetic emissions fromaccess powerline communications networks

Limits of conducted common mode (asymmetric mode) disturbances at network cables

Limits of radiated disturbances from networks cables

COST286 meeting Barcelona 14/15 April 2005


ITU-T K.60

Emission limits and test methods for telecommunication networks

 No conducted interference limits apply

 Limits for unwanted disturbance emissions from telecommunication networks

COST286 meeting Barcelona 14/15 April 2005


H-field limits converted to E-field using the far field correction of 51.5 dB

COST286 meeting Barcelona 14/15 April 2005


BUTE correction of 51.5 dBPart 2

Site Trial using the low voltage feeder

of RBS sited on HV power line tower

COST286 meeting Barcelona 14/15 April 2005


Site Trial correction of 51.5 dBusing the low voltage feeder

of RBS sited on HV power line tower

COST286 meeting Barcelona 14/15 April 2005


Signal injection correction of 51.5 dB

HE

Modem

Radiated field metering

Measuring concept

3 phase Low Voltage feeder

PVC insulated phase conductors wounded around a bare neutral

COST286 meeting Barcelona 14/15 April 2005


System overview correction of 51.5 dB

Coupling PLT HE: (capacitive, inductive) - one, two or three phase to neutral - phase to phase - any other combination

PLT Modem: (only capacitive) - only phase to neutral

Used frequencyUpstream: 13.8 – 16.3 MHz (512 carrier)Downstream: 19 – 22.8 MHz (768 carrier)

Injected signal levelmax. 30 dBm

Data transfer rateDownstream: max. 27 MbpsUpstream: max. 18 Mbps

COST286 meeting Barcelona 14/15 April 2005


Characteristics to be measured correction of 51.5 dB

  • K-factor measurement - H-field - Noise floor - Injected signal

  • Ingression Noise

  • LCL, TCL measurement - CM current

  • Attenuation characteristics measurement

  • Assessment of a technique to mitigate electromagnetic radiation from PLC

Note: Regarding the measuring procedures, see: (JTA) “EMC analysis of LF unstructured telecom networks”

COST286 meeting Barcelona 14/15 April 2005


EPFL Part 3 correction of 51.5 dB

Mitigation of electromagnetic field radiated by PLC systems

(in indoor environment)

COST286 meeting Barcelona 14/15 April 2005


Mitigation of emissions

- correction of 51.5 dB

IPLC

Vcomp

+

+

Icomp

hPLC(f)

VPLC

-

Vcomp=-VPLC

hcomp(f)

Mitigation of emissions

Injection of an auxiliary compensation signal)

EPLC=VPLChPLC(f)

Ecomp=Vcomphcomp(f)

?

hPLC(f)

Vcomp hcomp(f)= -VPLC hPLC(f)

hcomp(f)

COST286 meeting Barcelona 14/15 April 2005


Classical Coupling of PLC Signals correction of 51.5 dB

COST286 meeting Barcelona 14/15 April 2005


Antenna mode and TL mode Currents correction of 51.5 dB

COST286 meeting Barcelona 14/15 April 2005


Mitigation correction of 51.5 dB

  • Idea: inject an auxiliary signal S2 into the line formed by the ground and the neutral conductors

  • The auxiliary signal S2 has the same amplitude and waveshape as the original PLC signal S1, but with opposite polarity

COST286 meeting Barcelona 14/15 April 2005


Proposed Coupling: Power Splitter correction of 51.5 dB

COST286 meeting Barcelona 14/15 April 2005


Bidirectional Data Transmission correction of 51.5 dB

COST286 meeting Barcelona 14/15 April 2005


Test Configurations correction of 51.5 dB

COST286 meeting Barcelona 14/15 April 2005


Measurements correction of 51.5 dB

COST286 meeting Barcelona 14/15 April 2005


Measurement Results correction of 51.5 dB

COST286 meeting Barcelona 14/15 April 2005


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