Yes, Clarke transformation can be used with a Scott transformer. Clarke transformation is a method to convert three-phase quantities to two-phase quantities, which makes it easier to work with. On the other hand, a Scott transformer is used to convert two-phase power to three-phase power, or vice versa. Although Clarke transformation is commonly used to transform three-phase quantities to two-phase quantities, it can also be used in reverse to transform two-phase quantities into three-phase quantities, which makes it applicable to the output of a Scott transformer. So, the answer is yes, Clarke transformation can be used with a Scott transformer.