The final objective of the control system design is its implementation for the real-time operation. This implementation requires hardware, software and real-time considerations. Although these technological aspects could be considered secondary, they are essential from the practical point of view. There are two associated problems to the implementation subject. The first problem is given by the fact that control strategies and control laws are really useful if they can be used in a real machine, which operates with time as well as computing capacity constraints. The second problem is related to the situation that large experimental turbines do not exist and the control software of commercial machines has to be certified before it can be installed. Thus, new control algorithms should be tested in a real-time environment, and on the other hand, it is not allowed to test them in a real machine. Another way to untangle this Gordian knot is to incorporate real-time aspects into the design and validate the control algorithms using technological methods such as real-time simulation and hardware-in-the-loop (HiL) simulation. The current chapter is a short introduction to the real-time implementation of control algorithms and HiL testing.