14. Generic DSL-Based Modeling and Control of Wind Turbine Type 4 for EMT Simulations in DIgSILENT PowerFactory

In this chapter, to cope with new challenges arising from the increasing level of power injected into the network through converter interfaces, a new wind turbine (WT) as well as a VSC–HVDC control concept, which determines the converter reference voltage directly without the need for an underlying current controller, is presented and discussed. Additionally, alternative options for frequency support by the HVDC terminals that can be incorporated into the active power control channel are presented. The implementation steps performed by using DSL programming are presented for the case of EMT simulations. Simulation results show that the control approach fulfills all the operational control functions in steady state and in contingency situations supporting fault ride through and emergency frequency support, without encountering the problems arising from current injection control.