What are advantages and disadvantages of AC and DC transmission?

What are the advantages of AC and DC transmission?

Key Advantages of AC over DC

AC type can be transmitted employing a step-up form of transformers but direct current cannot be transmitted by this solution. The AC is simpler to produce than DC. It is also less expensive than DC to generate. The AC systems have higher efficiency than DC such as ac generators.

What are the advantage of DC transmission?

The underground cables can be effectively used in dc power transmission because of less potential stress and negligible dielectric loss. For a given load and sending end voltage, the dc transmission decreases the voltage drop in the line which results in better voltage regulation compared to ac transmission.

What is the disadvantage of DC transmission?

The amplitude of DC voltage cannot be modified (step-down or step-up) simply, such as in systems using transformers. Therefore, we cannot obtain the desired voltage for electrical appliances (such as 5 Volts, 12 Volts, 15 Volts, 18 and 24 Volts, etc.) directly from the distribution and transmission lines.

What are the disadvantages of AC as compared to DC?

The peak value of A.C. is high and it is dangerous to use so better insulation is required. It attracts a person who touches it, unlike D.C. which gives a repelling shock. An A.C. is transmitted from the surface of the conductor and hence need several strands of thin wires insulated from each other.

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Is DC transmission better than AC?

Alternating current is cheaper to generate and has fewer energy losses than direct current when transmitting electricity over long distances. Although for very long distances (more than 1000 km), direct current can often be better.