Advantages of AC Transmission:
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Power can be generated at high voltages as there is no commutation problem.
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Ac voltages can be conveniently stepped up or stepped down.
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High voltage transmission of ac power reduces losses.
Disadvantages of AC transmission:
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Problems of inductances and capacitances exist in transmission lines
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Due to skin effect, more copper is required.
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Construction of AC transmission lines is more complicated as well as costly
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Effective resistance of ac transmission lines is increased due to skin effect.