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TO transmit power fromproduction company to distripution company the transmission ccompany is used
Transmission company
1- O. H. T .L (For routed in desert Places)
2- UGC (For building blaces)
Distribution company
We step down the voltage to voltag level (66kv,33kv,11kv,0.4kv)
to be used for consumer so we make step down from 220/169 kv then from 169/133kv then from 133/66kv and so on
power Transmission

POWER SYSTEM

we use step up transformer
in power station because the rating for synchronous generator is about 18:23kv so the current is high value
p=3V*I*PF

The power system network consist of some element and this element classified the electricity company into three category
1-production company (power station)
2-transportation company
3- distribution company