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## Homework Statement

A 400 kV transmission line has a length of 500 km and a reactance of 0,4 Ω/km. How much power can you transmit, if the power angle (the angle between the voltages of the beginning and the end) is limited to 25 degrees? What would then be the line’s boundary power limit for static stability ?

## The Attempt at a Solution

Hi, in the lecture we have a formula that give P =(Vs*Vend)*sin(power angle)/Z

where Z is the impedance of the line so i guess it is 500*0.4 reactance, Vs i=400kV (source voltage) but in the problem i don't have Vend voltage at the end of the line, how can i solve the probleme without knowing that ?