What to use to attenuate 220 V at 50Hz to the minimum possible level in a power line?

[te04-0202]

I am doing a project on Power Line Communication. So I need to send data at 100 KHz on 220 Volts Power line at 50 Hz. Hence I need to attenuate 220 Volts at 50 Hz to the minimum possible level.

For this I will have to use Passive High Pass Filter both at Transmitter and Receiver end. Filter would be a combination of Capacitors and Inductors.

So, the problem is that I have never used Inductors before. So what type of inductors should I be using to attenuate 220 Volts at 50 Hz, that is what should be their Voltage Rating or Current Rating, etc. Or I would have to use a transformer instead of inductor.

Please help me.

 

[y2kpakistan]

Power Line Carrier

hi brother!!!
it is more suitable to use a band pass filter for more safety. you can casecade the high and low pass filter to get a band pass filter.

in band pass one is lower cut-off and 2nd is high cut-off. these are the frequency ranges that will be passed by filter. you can design a filter haveing frequency range from 20 kHz to 150 kHz. 20 is lower cut-off and 150 is higher cut-off.

you can calculate the component values by following equations.

Fc= 1/2*pi*RC
for example:

for The Low Pass Filter Stage:

R1= 15.9 K ohm
and Fc= 30 KHz

then
C1=1/2*pi*Fc*R1

and C1= 10 nF

similarly for high pass stage:

R1 is same and Fc is 1KHz
then C2= 334 pF

the filter circuit is attached.\
https://obrazki.elektroda.pl/11_1261064801.jpg
https://obrazki.elektroda.pl/11_1261064801_thumb.jpg

i hope it will be useful in your project

with regards

khalid shabbir

Added after 2 minutes:

hi brother

u can get the filter circuit from following url.
https://obrazki.elektroda.pl/48_1261065005.jpg
with regards

khalid shabbir

 

[dick_freebird]

Power Line Carrier

You might want to use a capacitor-blocked, high frequency
transformer because Job 1 is safety - galvanic isolation
of a few thousand volts is not only a good idea, but would be
an absolute requirement for getting your product (if it were
real life) certified.

Tune your LC, primary inductance (and reflected secondary)
and capacitor to your 100kHz carrier tone. You can post-filter
additionally in the signal processing chain.

Going this way with a "sniffer" across the mains, probably
will give you more signal than trying to pul it off the secondary
of some "big iron" 60Hz power transformer.