If you are going to travel by AVE, before you can access the train you will have to go through a security control in which you will have to show your ticket and place your luggage on a tape in which a security agent will evaluate its content with the help of a scanner. You have all the information in: «Luggage on the AVE: suitcases allowed«.
You have all the information in: "Luggage on the AVE: suitcases allowed".