- #1
joej
- 29
- 0
If 30 MW of power at 45kV (rms) arrives at a town from a generator via 4-ohm transmission lines, calculate the fraction of power generated that is lost in the lines.
okay I think I'm not completely understanding what I'm supposed to do in this question, or I'm missing something as from my calculations there is more than 100% power loss
P/V = I
30,000,000W/45,000V = 666.7 A
Pl = I^2 x R
666.7^2 x 4 = 1777955.56V = 1778kV
probably something completely stupid that I'm doing here so would appreciate it if someone can set me straight, thnx
----edit-----
sorry stupidity strikes again... forgot that the power lost comes out in W not V
:yuck: duh! sorry again, it's fine now
okay I think I'm not completely understanding what I'm supposed to do in this question, or I'm missing something as from my calculations there is more than 100% power loss
P/V = I
30,000,000W/45,000V = 666.7 A
Pl = I^2 x R
666.7^2 x 4 = 1777955.56V = 1778kV
probably something completely stupid that I'm doing here so would appreciate it if someone can set me straight, thnx
----edit-----
sorry stupidity strikes again... forgot that the power lost comes out in W not V
:yuck: duh! sorry again, it's fine now
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