Control of a wind power station with the strategy of a conventional power plant: Assigning synchronous machine behavior on a full inverter based wind power station

Integration of wind power stations in primary control of the grid can be necessary in future. One solution to solve this problem is the emulation of a turbine and a generator such as in conventional power plants. The model is split into two parts: The grid-side inverter is controlled by a model of a separately excited synchronous machine with amortisseur in combination with torque and excitation voltage control. On the other side the physical generator is controlled by a virtual turbine that has to keep the voltage of the dc-link on a fixed level. The dc-link represents a virtual shaft between both models. Over droops the wind power station is now able to take part in primary control. Simulation includes all electrical parts of wind power station from wind wheel to grid supplying. Implementation of both models is shown and discussed with results of simulation.