Abstract: Disclosed is an electronic, analog, real time simulator for simulation of hydro turbines. This simulator comprises circuits for introducing working conditions of the turbine, such as, for example, the position of the gate controlling the quantity of water flowing through the turbine and the water head. The working conditions are converted by a plurality of multiplication circuits into standardized signals that are supplied to simulating circuits in which the standardized signal are converted into transfer functions. Each of these simulating circuits receives at least one of the standardized signals as an input signal and generates an output signal representing intermediary results, such as the water flow or the generated power. The so obtained intermediary results are then supplied to other multiplication circuits in which they are converted into useful signals representative of the working conditions of the turbine.

Abstract: The invention concerns the analog simulation of the parameters and the operating characteristics of three-phase rotating machines. The system comprises a unit for transforming the three-phase armature currents of a machine into equivalent diphase currents and a further unit for transforming the diphase currents into currents so-called of direct and quadrature axes. A generator and control circuit simulates the parameters and operating characteristics of the machine in function of those currents of direct and quadrature axes, and feeds another circuit for generating diphase voltages. These diphase voltages are then transformed into three-phase voltages from which the dynamic characteristics of the machine are generated.