Dear Anagha
Check: Do you have costs in receiver (Production) cost centers for Power activity? If yes then Ok.
Check : have you run actual Indirect activity allocation also? If yes OK. After that have you calculated actual activity prices or not. Probably this is missing. if it is also Ok then go to next point.
In your cost component structure you need to map activity type used in Production cost center i.e. cat1. Probably you have used there act cat.2 or 3. Activity type cat 2 or 3 role is over after doing indirect activity allocations. After that in all places you have to use power activity type used in production cost centers (cat1).
Regards
Rajneesh Saxena