Wind energy is playing a critical role in low carbon economy, and it is expected that up 320GW of wind energy will be installed in the EU by 2030, and 66GW of this capacity will be offshore. It is therefore important to understand the impact of such large penetration of wind on the existing AC grids to ensure secure and reliable operation under different operating conditions. To do so, sophisticated and representative models of wind turbines with their associated controls are required. A semi aggregated wind turbines model which is developed in RTDS will be presented. The model uses the dual time step technique that is available in RTDS to model power systems and power electronics components in different time steps. The developed model is based on a variable speed wind turbine (WT) with Permanent Magnet Synchronous Machine (PMSM) and connected to an AC grid through a full scale back to back (B2B) three-level Voltage Source Converter (VSC). This type of wind technology provides the maximum controllability of wind power and better capability of fault ride-through compared to other WTs technologies. The developed RTDS model aggregates 500 variable speed PMSM-WTs, and each individual PMSM-WT has 2MVA capacity. The model can be used for studying the transient and dynamic interactions between a large wind farm and an AC grid.
Abdullah Emhemed • University of Strathclyde