So you have a comparator, relay, driver and power supply in you system. Have you prototyped it? I have a couple issues. First of all, what is the purpose of the slave transformer? What advantage is there in having two transformers over just having one with sufficient capacity? Secondly, a final year project should be complex enough to demonstrate what you've learned in all your many years at your university, and I don't see that level of complixity in your description. I'm not saying your project isn't complex enough, but there must be something to it other than what you've described so far.
What if instead of switching transformers, your project switched power generators. Then you could show a real purpose, and that would be the efficiency gained by turning off generators when the load is light. You could add a micro controller to send the start signal to the generator and stop the signal when you have an indication that the generator is up and running. The you can get fancy, have one generator be a 5KW and the other be 10KW, and that way you can dial up either 5, 10 or 15 KW as the need arises.
Just a thought.