Electrical Bus

The large network of conductors between the power station and the consumers can be broadly divided into two parts such as, transmission system and distribution system. Each part can be further sub-divided into two- primary transmission and secondary transmission and primary distribution and secondary distribution.
Advantages

· The power can be generated at high voltages.

· The DC voltage cannot be stepped up for transmission of power at high voltages.

· The DC switches and circuit breakers have their own limitations.

Disadvantages

. An AC line requires more copper than DC line

. The construction of AC transmission line is more complicated than Dc transmission line.

. Due to skin effect in the AC system the effective resistance of the lines is increased.

. An AC line has capacitance. Therefore, there is a continuous loss of power due to charging current even when the line is open .