SARAH RÖNNBERG-Sweden-Session6- Block4-0186 Vienna 21-24 May 2007 1 Attenuation and noise level – Potential problems with communication via the power grid.

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SARAH RÖNNBERG-Sweden-Session6- Block Vienna May Attenuation and noise level – Potential problems with communication via the power grid Sarah Rönnberg, Luleå University of Technology Martin Lundmark, Luleå University of Technology Mats Wahlberg, Skellefteå Kraft Elnät AB Marcus Andersson Luleå University of Technology Anders Larsson, Luleå University of Technology Math Bollen, STRI and Luleå University of Technology

SARAH RÖNNBERG-Sweden-Session6- Block Vienna May Three potential problems Signals interfere with the communication Power electronics often generate noise The communication becomes an interfering signal Light Flicker The communication signals are attenuated Attenuation by shunting

SARAH RÖNNBERG-Sweden-Session6- Block Vienna May When the communication becomes an interfering signal The communication signals can be: Contributing factor to light flicker Audible in end-user equipment

SARAH RÖNNBERG-Sweden-Session6- Block Vienna May Attenuation by shunting GridLoad Transmitter/ Receiver

SARAH RÖNNBERG-Sweden-Session6- Block Vienna May Test setup Cable Distribution Cabinet Power transformer Cable Distribution Cabinet concentrator power meter end-user equipment Power transformer

SARAH RÖNNBERG-Sweden-Session6- Block Vienna May Energy-saving lamp A Cable Distribution Cabinet concentrator power meter end-user equipment

SARAH RÖNNBERG-Sweden-Session6- Block Vienna May Energy-saving lamp B Cable Distribution Cabinet concentrator power meter end-user equipment

SARAH RÖNNBERG-Sweden-Session6- Block Vienna May Impedance of energy-saving lamp Energy-saving lamp B Energy-saving lamp A

SARAH RÖNNBERG-Sweden-Session6- Block Vienna May Impact of different cable length

SARAH RÖNNBERG-Sweden-Session6- Block Vienna May Conclusion The emission by end-user equipment may interfere with the communication signal The communication signal may have an impact on the performance of end-user equipment Attenuation by shunting will be a concern for successful communication via the power grid

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