Design and Installation of 220/66 KV Gas Insulated Substation
Mohamed, Magdy Hussein Abdelmawgod ; author
Abdelaziz, Mohamed Galaa Sabry ; author
Hammad, Ziad Mohamed Samy ; author
Abdullah, Mousa A. ; supervisor
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The electric power is produced at the power stations which are located at favourable places, generally quite away from the consumers. It is delivered to the consumers through a large network of transmission and distribution. At many places in the line of the power system, it may be desirable and necessary to change some characteristic (voltages, currents, voltage a.c. to d.c., etc.) of electric supply. This is accomplished by suitable apparatus called substation. For example, generation voltage (11 kV or 6·6 kV) at the power station is stepped up to high voltage (say 220 kV or 132 kV) for transmission of electric power. The assembly of apparatus (e.g. transformer etc.) used for this purpose is the substation. Similarly, near the consumers localities, the voltage may have to be stepped down to utilization level. This job is again accomplished by a suitable apparatus called substation. Yet at some places in the line of the power system, it may be desirable to convert large quantities of a.c. power to d.c. power e.g. for connecting two different frequencies networks, traction, electroplating, d.c. motors etc. This job is again performed by suitable apparatus (e.g. ignitron) called substation. It is clear that type of equipment needed in a substation will depend upon the service requirement.