AC vs DC Power Supply System | Comparative Analysis | Power Systems
Comparison of AC and DC Power Transmission Systems
In this, we will discuss the advantages and disadvantages of AC and DC power transmission systems. It is
important to evaluate both methods and consider operational requirements before making a decision.
Advantages of AC Power Supply System
Power generated in AC system is higher compared to DC system.
AC voltage can be manipulated using transformers to increase or decrease its value according to
operational requirements.
Maintenance of AC substations is easier and less expensive.
Disadvantages of AC Power Supply System
Requires more copper for transmission and distribution conductors, making it more expensive.
Design and construction of AC transmission and distribution lines are more complex compared to DC
lines.
AC system experiences skin effect, where alternating current concentrates near the surface of
conductors, resulting in inefficient utilization of the whole cross-sectional area.
AC lines have capacitance and inductance, leading to continuous power loss.
Advantages of DC Transmission System
Requires fewer conductors, resulting in lower cost and simpler design.
No inductance and capacitance, eliminating phase displacement and surge problems.
Better voltage regulation due to less voltage drop across transmission lines.
Utilizes the entire cross-sectional area of conductors, unlike AC system which only uses end surface
areas.
Less stress on insulation and reduced corona loss and interference with other communication lines.
DC transmission is free from dielectric losses and stability problems.
Comparison of AC and DC Power Transmission Systems
In this, we will discuss the advantages and disadvantages of AC and DC power transmission systems. It is
important to evaluate both methods and consider operational requirements before making a decision.
Advantages of AC Power Supply System
Power generated in AC system is higher compared to DC system.
AC voltage can be manipulated using transformers to increase or decrease its value according to
operational requirements.
Maintenance of AC substations is easier and less expensive.
Disadvantages of AC Power Supply System
Requires more copper for transmission and distribution conductors, making it more expensive.
Design and construction of AC transmission and distribution lines are more complex compared to DC
lines.
AC system experiences skin effect, where alternating current concentrates near the surface of
conductors, resulting in inefficient utilization of the whole cross-sectional area.
AC lines have capacitance and inductance, leading to continuous power loss.
Advantages of DC Transmission System
Requires fewer conductors, resulting in lower cost and simpler design.
No inductance and capacitance, eliminating phase displacement and surge problems.
Better voltage regulation due to less voltage drop across transmission lines.
Utilizes the entire cross-sectional area of conductors, unlike AC system which only uses end surface
areas.
Less stress on insulation and reduced corona loss and interference with other communication lines.
DC transmission is free from dielectric losses and stability problems.
