Transmission Lines: Carry Power & Comm Frequency

[brahma211]

how transmission carry both power frequency(50Hz) and communication frequency (MHz) at a time

 

[vk6kro]

This won't normally happen unless you supply an input that is a combination of the two input signals.

However, any point on the line can only have one voltage at a time, so the line carries a resultant of two input waveforms.

 

[meBigGuy]

A transmission line, as a linear device, can carry many frequencies (like your cable television) without them interfering. You can then tap in and selectively filter for the signals you want. No reason they can't go down to 60 Hz, or even DC.

A MHz signal source/receiver can be capacitively coupled to a power line and see very little of the 60 Hz power.

 

[davenn]

A transmission line, as a linear device, can carry many frequencies (like your cable television) without them interfering. You can then tap in and selectively filter for the signals you want. No reason they can't go down to 60 Hz, or even DC.

A MHz signal source/receiver can be capacitively coupled to a power line and see very little of the 60 Hz power.

yup exactly which is the basis for the cursed BPL system, Broadband over Power Line

On a small and loacalised system, I have dealt with home intercom systems in years gone by that injected and recovered audio onto the house mains system. The intercoms could be plugged into any power outlets around the house and would operate
( NOTE ... Not if there was a multiple phase system used in the building)


Dave

 

[alphy]

Transmission lines are an important component of the modern electrical grid, carrying both power and communication frequencies simultaneously. This is made possible through the use of different types of transmission lines, each designed to handle specific frequencies.

Power frequencies, typically 50Hz, are used to transmit large amounts of electrical power from power plants to homes and businesses. These frequencies are carried by high voltage transmission lines, which are designed to minimize energy loss and maximize efficiency over long distances.

On the other hand, communication frequencies, typically in the megahertz (MHz) range, are used for transmitting data and information. These frequencies require different types of transmission lines, such as coaxial cables or fiber optic cables, which are designed to minimize signal loss and interference.

The key to carrying both power and communication frequencies on the same transmission line is through careful design and engineering. The physical and electrical properties of the materials used in the transmission lines, as well as the layout and configuration of the lines, are carefully chosen and optimized to allow for the efficient transmission of both types of frequencies.

In addition, advanced technologies such as multiplexing and frequency division multiplexing are used to separate and combine different frequencies on the same line, allowing for the simultaneous transmission of power and communication signals.

Overall, the ability to carry both power and communication frequencies on the same transmission line is crucial in our modern world, where reliable and efficient transmission of both types of signals is essential for our daily lives. As a scientist, it is important to continue researching and developing new technologies to further improve the capabilities and efficiency of transmission lines.