After the generation of electricity in power plant the Electrical Transmission occurs for the distribution of electricity to the consumers.
Electrical Transmission Scheme
While, In PAKISTAN the Generated electricity carries a voltage of 11KV.
Then the voltage is step up by using a transformer. Thus the voltage becomes 500KV. This voltage is then transmit to the receiving station (Primary Sub Station).
In Primary sub station Which the voltage was step down to the 220KV. Moreover, the voltage direct again to secondary sub station. where the voltage also stepped down to the 132KV or 66KV.
After the secondary sub station the power becomes 11KV and Electrical Transmission then becomes electrical distribution which is defined below.
Hence, Electric power distribution is the final stage in the delivery of electric power; it carries electricity from the transmission system to individual consumers. Therefore, Substations connect to the transmission system and lower the transmission voltage to medium voltage ranging between 2 kV and 35 kV with the use of transformers.
While Primary distribution lines carry this medium voltage power to distribution transformers located near the customer’s premises. Moreover, Distribution transformers again lower the voltage to the utilization voltage used by lighting, industrial equipment or household appliances.
|Transmission lines carry energy from power stations to substations at VERY high voltages.||Distribution lines carry energy from substations to neighborhoods at HIGH voltages.|
|transmission is the movement of electricity from power plant to power sub stations near populations||while distribution refers to carrying electricity from this sub station down to end consumers|
|Electrical transmission is done only in three phase||While distribution is done normally in single phase|