The 25-year-old midfielder joined the Eagles on Friday after being released by Blackpool.
"It's very nice because every game is a new challenge," Grandin told the club's official website.
"It's like a cup final every game. You play against great players, great teams, so you have to be focused on your football and everyone has to give their best because it's a difficult league – the best league in the world, I think."
Palace start the new season at home to Tottenham Hotspur on August 18.