How does the electrical system work in Portugal? Electrical current is 220 volts, 50Hz. Electrical sockets comply with European regulations. Round two-pin plugs are used, the Classical Continental Style.
You may need to carry an adapter plug with you to fit the outlets. An adapter will allow you only to plug your appliance into another type of outlet. An adaptor, does NOT change (convert) the electrical voltage. Make sure you have the right equipment needed to use any electrical appliances you're bringing on your trip.
Most "Hotels" in Praia da Luz offer hair dryers and irons so you don't have to bring your own and some, if necessary, may even provide you with adaptors for different types of plugs.