Introduction to electrical and computer engineering ENG1450 All Labs

ENG 1450 Introduction to Electrical and Computer Engineering

Lab 3

AC Voltages, Transformer, Generator



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ENG 1450 - Lab 3 May 18, 2023-v1 Page 1

, Part A: Efficiency of Power Delivery at High Voltages
1. You want to deliver power from a power plant to a city 500 km away. Your circuit uses 2
wires (one going to the city, and one coming back), each having 12 Ω resistance over that
distance. You generate 2 GW of power and send it to the city.

a) If you transmit the power at 500,000 V (i.e. the total voltage across both wires would be
500,000 V), what is the current flowing in the wires?

I wire = ____________

b) What is the resistive power loss in the wires?


P wire loss = ____________

C) What is the efficiency of the power delivery?


____________


2. In the above example, what if you doubled the voltage and delivered the power at 1,000,000
V across both wires?


I wire = ____________


P wire loss = ____________


____________




ENG 1450 - Lab 3 May 18, 2023-v1 Page 2