This paper proposes a real time dynamic simulator for the implementing and testing control algorithms. The dynamic simulator is used to simulate control a synchronous power plant in real time. The simulator consists of a PC on which the synchronous generator is simulated, connected through a communication channel to a DSP into which the control algorithm has been implemented. The dynamic simulator verifies the control algorithm by a simulation in real time. The dynamic simulator in real time enables faster processes of engineering, implementing and verifying control algorithms not only for the voltage control system of a synchronous generator, but also for other systems able of having mathematical and simulation models.