Model-based control for doubly fed adjustable-speed pumped storage units with fast power support

In order to enhance the stability of the whole microgrid, this paper proposes a novel control strategy based on electromagnetic models of doubly fed adjustable-speed pumped storage units (DFASPSU). The hydro turbine models of the generator mode and pumping mode are established respectively. The proposed control method for rotor side converter (RSC) can provide reactive power support faster than the traditional control method during the fault periods. Grid-side converter (GSC) is also able to improve the capacity of reactive power support. The simulation results are compared with the traditional control and the proposed control is verified to enhance the voltage support with faster response during the fault period. And the transient stability of the power grid can be improved.