Question

Corona loss on a particular system at 50 hz is 1 kw/phase per km. The corona loss on the same system with supply frequency 25 hz will be

Answer 1

Answer :

The corona loss on the same system with supply frequency 25 Hz will be 0.667 kW/ phase /km

Step by step Explanation :

Hey Mate,

Given,

F₁  = 50 Hz

F ₂ = 25 Hz

P₁  = 1 Kw/Phase

P ₂  = ?

Corona Loss = α (F + 25)

P₂/ P₁ = (F₂ + 25) / (F₁ + 25)

P₂/ 1 = (25 + 25) / (50 + 25)

P₂ = (50) / (75)

P₂ = 0.66666...

P₂ ≈ 0.667 kW/ phase /km

So,

The corona loss on the same system with supply frequency 25 Hz will be 0.667 kW/ phase /km