COST286 meeting Barcelona 14/15 April BUTE Part 1 Conducted and radiated disturbance regulations for PLC devices János Löcher; György Varjú BUTE 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) EPFL

COST286 meeting Barcelona 14/15 April BUTE Part 1 Conducted and radiated disturbance regulations for PLC devices

COST286 meeting Barcelona 14/15 April IEC Signaling on low voltage electrical installations  No radiated interference limits apply below 30 MHz  Limits of mains terminal interference voltage

COST286 meeting Barcelona 14/15 April 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 ITU-T K.60 Emission limits and test methods for telecommunication networks  Limits for unwanted disturbance emissions from telecommunication networks  No conducted interference limits apply

COST286 meeting Barcelona 14/15 April H-field limits converted to E-field using the far field correction of 51.5 dB

COST286 meeting Barcelona 14/15 April BUTE Part 2 Site Trial using the low voltage feeder of RBS sited on HV power line tower

COST286 meeting Barcelona 14/15 April Site Trial using the low voltage feeder of RBS sited on HV power line tower

COST286 meeting Barcelona 14/15 April HE Modem Signal injection 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 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 frequency Upstream:13.8 – 16.3 MHz (512 carrier) Downstream:19 – 22.8 MHz (768 carrier) Injected signal level max. 30 dBm Data transfer rate Downstream:max. 27 Mbps Upstream:max. 18 Mbps System overview

COST286 meeting Barcelona 14/15 April Characteristics to be measured 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 EPFL Part 3 Mitigation of electromagnetic field radiated by PLC systems (in indoor environment)

COST286 meeting Barcelona 14/15 April Mitigation of emissions V comp + - I comp - + V PLC I PLC E PLC =V PLC h PLC (f) h PLC (f) E comp =V comp h comp (f) h comp (f) V comp h comp (f)= -V PLC h PLC (f) ? V comp =-V PLC h PLC (f) h comp (f) Injection of an auxiliary compensation signal)

COST286 meeting Barcelona 14/15 April Classical Coupling of PLC Signals

COST286 meeting Barcelona 14/15 April Antenna mode and TL mode Currents

COST286 meeting Barcelona 14/15 April Mitigation u Idea: inject an auxiliary signal S 2 into the line formed by the ground and the neutral conductors u The auxiliary signal S 2 has the same amplitude and waveshape as the original PLC signal S 1, but with opposite polarity

COST286 meeting Barcelona 14/15 April Proposed Coupling: Power Splitter

COST286 meeting Barcelona 14/15 April Bidirectional Data Transmission

COST286 meeting Barcelona 14/15 April Test Configurations

COST286 meeting Barcelona 14/15 April Measurements

COST286 meeting Barcelona 14/15 April Measurement Results