Question

Why are transmission losses so crucial that electrical power systems are designed to work on Alternating currents?

• A. Electrical power systems are not very efficient for transmission of power
• B. It is a practice to use AC over DC
• C. AC networks are easier to handle than DC Networks and constructional setup cost is really high in DC
• D. Since, power stations are very far away from destinations, transmission has to be done over long distances and losses add up over the distance

Answer 1

The correct option is D Since, power stations are very far away from destinations, transmission has to be done over long distances and losses add up over the distance

Long distance transmission is preferred using AC. Voltage level transformation is easier in AC and cost in the process in not much compared to total costs in long distance transmission. This facilitates to reduce losses in the transmission line and makes system very efficient.