Experimental investigation of a grid-tied high efficiency reversible pump-turbine energy storage system employing an adjustable BLDC drive.

In this study, analysis of a high-efficiency grid-connected pump hydro energy storage (PHES) system that uses a bidirectional brushless DC (BLDC) machine is presented. The proposed layout is substantially less complicated since it uses an electronic power conditioning system to make all necessary modifications before connecting to the power grid, which removes the need for any mechanical components. This allows for the power plant's reliability to be improved while simultaneously reducing costs. An exhaustive model of the PHES system is created, and a two-tiered synchronous reference control technique for a grid side converter and a simple PI controller for the machine side converter is developed. Hardware data from a compact experimental setup are used to analyse the efficacy of the proposed PHES system. [ABSTRACT FROM AUTHOR]