Study on real-time simulation model of 3/12-phase double winding generator in Hypersim

The real-time simulation is in demand to study the control strategies and the protection measures of isolated power systems, which are equipped with special components like 3/12-phase double winding generators to meet the AC and DC power supply demand simultaneously. But right now no power system real-time simulators offer the simulation models of these components, and hence it is compulsory to study the modeling method. In this paper, the implicit trapezoidal method is applied to transfer the 3/12-phase double winding generator´s mathematical model into difference equations. Using the stator-rotor-separate iteration method, the generator´s equivalent circuit model is derived. Then, following the user code model (UCM) building approach, the real-time simulation model of double winding generators is built in Hypersim. The short circuits occurring at AC side, DC side and both sides of the generator are simulated and experimented, and the comparison of the results shows the validity of the model. The modeling method can be applied to model other components, and lays the foundation for real-time simulation and hardware-in-the-loop test of the isolated power systems.