I do not know the AC line impedance, but you apparently use the AC line as a long antenna radiation your 200 kHz signal over India everywhere your AC lines go.
Is it legal in India to use 200 kHz to interfere other services? I think also harmonics will be radiated. Really a bad idea.
Sine 1990, there were "digital power line communicators" sold and installed around the world. Such devices utilize frequencies between 5 and 30 MHz, and have caused a lot of problems, also to radio amateurs.
Many ideas are technically possible but these are immoral and only realised to generate money through very poor engineering.