Wherever BESS is a standalone system, the energy management system (EMS) is the link between the grid demand and the Battery Management System (BMS). It continually monitors grid requirements and accordingly facilitates transfer of energy to/from the BESS, by utilizing control logic.
Modular-gravity energy storage (M-GES) plant control system is proposed for the first time. The energy management system of the M-GES plant was first systematically studied. A detailed mathematical model of the energy management system of the M-GES plant is presented for the first time.
This paper presents the control system of the M-GES power plant for the first time, including the Monitoring Prediction System (MPS), Power Control System (PCS), and Energy Management System (EMS). Secondly, this paper systematically investigates the EMS of the M-GES power plant. We develop the M-GES EMS models and derive the expression of SOC.
The energy management system of the M-GES plant was first systematically studied. A detailed mathematical model of the energy management system of the M-GES plant is presented for the first time. An energy control strategy for M-GES plants, the maximum height difference control (MHC), is proposed and validated.
MPS involves the optimal interaction between the M-GES plant and the grid, while this paper focuses on the control technology within the M-GES plant, so MPS will not be discussed further. The Power Control System (PCS) realizes the primary function of the M-GES plant (also the energy storage plant) - power balancing.
The energy management system (EMS) also deserves further research, including the improvement based on the MHC proposed in this paper (Considering the power station's structure, the unit's capacity, and the system's operating status, etc.) and the research of new control technology.