Power control analysis for variable speed pumped storage with full-size converter

Variable speed pumped storage (VSPS) with full-size converter can be an effective measure for automatic frequency control and balancing renewable generation power fluctuation. This paper mainly studies the modeling and control strategies of both the machine-side and grid-side converter, basing on the structure of VSPS with three-level full-size converter. The characteristics of power regulation are analyzed for both generator mode and motor mode. On a basis of the given reference power generated by the need of grid operation, the control strategy of active power and reactive power is described. Finally, the authors illustrate the effect of the VSPS with full-size system for the network power control with renewable generation with MATLAB/SIMULINK.