what was the actual reason for blackout in northern grid? plz give me proper answer. How it done?

thank you sir....

In aircraft when lighting strike is on it then how it can earth lighting surges.........plz give me answer...........

K GAYATHRIif a generator capacity is 250MW and it is providing 200MW according to the load if the load increases to 210MW suddenly how this power will be generated because...

HI FRIENDS, I have one question in PSACD software. i work in AC system fault analysis. so i required variable transmission line how make in PSCAD software. so i can...