Power Transmission

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Power Transmission

CHAPTER 1. GRID SYSTEM
Power Transmission in a country is usually done through what is known as a Grid System. The Grid
System consists of extensive interconnected transmission network supplying the whole country. Its supply
from a small no. of very large and highly effective power stations. The basic network is usually 132kHZ.
For a very high industrialised nation they use 275,475,800,1250 kV. Most consumers receive supplies from
medium voltage distribution system of 3.3kV, 415V, 240V. For heavy industry consumer they may be
supplied with 11 or 33kV.
The generators produce electrical power at 11kV / 25kV and it is stepped up by using a step- up
Transformer (X知er) to a value of 132kV before it is transmitted. The receiver station will step - down the
voltage to a value of 33kV at various distributions centres.

Generating station 11kV / 25kV

Step up X知er 25kV / 32kV Sending station.

Step down X知er 132kV / 33kV Receiving station.

Step down X知er 33kV Heavy Industry.


Step down X知er 11kV Light Industry

Step down X知er 3.3kV ...

Submitted by: digitalessays
Date Submitted: 01-06-2003
Category: Social Issues
Words: 2690
Pages: 10.76