Dear colleagues
This question is a continuation of the considerations set out in the previous question:
https://www.researchgate.net/post/What_is_the_impact_of_medium-voltage_lines_on_transmission_of_data_via_Wi-Fi_from_sensor_placed_near_medium-voltage_line_in_distance_up_to_30_cm
My new question is:
How to decrease the resistance of transmission WiFi in a strong EM field from the MV line (60Hz)?
Is the direction of WiFi antenna affects the transmission of data from sensors in the vicinity of the MV line?
What physical phenomena are accompanying the data transmition of WiFi antenna in the strong magnetic field of 60 Hz?
Whether any standards are available in this matter in USA and EU?
I would be gratefull for your sugestions and giving me sample papers on related problems.
Best Regards,
Piotr
Hi Piotr,
First, a bit on the earlier question (which I could not attempt then, simply because I had not joined RG at that time !!):
- Since the Wi-Fi operates at very high frequency, only high frequency harmonics from the MV line can interfere, if at all !
- A common power frequency line will simply not have such frequencies unless power electronic equipment are connected to it, and are injecting harmonics into the MV line. So check for such equipment connected to the line.
- The interference (if at all !!) will be largely through inductive-capacitive coupling, of the similar type as erstwhile telephone line interference faced due to proximity to HVDC links (you can read about this from any good book on HVDC - you can also get standards under IEEE).
Now for your present question:
Since the Wi Fi frequency is very high, as I said capacitive-inductive coupling will dominate. Resistive effects in the coupling medium can practically taken to be negligible !! That is, the interference (if any) can be assumed to be lossless...
With best wishes.
-Sanjay
As mentioned by others, the 60Hz line is simply a metal object in terms of wifi. The fact of transmission voltage being 27kV or zero has no effect on the 2.45GHz wifi signal. Interference could be from essentially non-existent power harmonics at that frequency, or direct wideband generation of microwave emissions via the corona phenomenon. If the latter, the level will vary with ambient humidity and line voltage.
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