The invention deals with a method to control a wind power installation. The wind power installation comprises a generator and a converter. The generator is operable to convert wind power into electrical power and to provide the electrical power from the generator to the converter. The converter is operable to adapt and to provide the electrical power to an electrical grid. The converter is operable to comply with pre-determined grid code requirements during a grid fault. According to the invention an amount of electrical power, which is present in the wind power installation during the grid fault, is fed into the generator. The generator is operable to convert the respective amount of electrical power into a generator loss.