Modeling and coordinated control for active power regulation of pumped storage‐battery integrated system under small‐disturbances

Abstract

Multienergy complementation is an important means to improve the capacity of renewable energy consumption and the key to achieving the goal of "net zero" globally. The hydro-wind-photovoltaic-storage hybrid system is an important technical approach, and in this system, pumped storage and battery energy storage are both key components for regulation. To study the problem of coordinated control of the two storage systems, a model of a pumped storage-battery integrated system (PSBIS) for simulating small disturbances of pumped storage units and the battery charge and discharge characteristics was established by MATLAB/Simulink in this study firstly. Then, two control strategies ("priority regulation of pumped storage" and "priority regulation of battery storage") are studied, and simulation calculations under ideal input and measured wind power disturbances are carried out to compare two control strategies by using the integrated system model under grid-connected conditions. The simulation results revealed that the "priority regulation of pumped storage" control strategy has a better performance on active power balance, compared with the "priority regulation of battery storage" control strategy. This work could provide technical support for coordinated control of the practical PSBIS in the future.

Research on joint dispatch of wind, solar, hydro, and thermal power based on pumped storage power stations

“…However, with the increasing capacity of wind and solar power, the issue of abandoning wind and solar energy is unavoidable, and conventional hydropower cannot effectively store the electricity generated from abandoned wind and solar power (Jin et al, 2023). Pumped storage, as a crucial technology for enhancing the absorption level of new energy, has developed rapidly in China (Garcia-Gonzalez et al, 2008;Feng et al, 2021;Huang et al, 2023;Liu et al, 2023;Wang et al, 2023). How to use pumped storage technology efficiently and economically to promote the absorption of new energy is an important direction of current research.…”

Quantifying power regulation characteristics in pump mode of variable‐speed pumped storage unit with DFIM

“…Pumped storage plants (PSPs) play an important role in power systems, 1,2 such as peak shaving, valley filling, frequency regulation, and phase regulation. 3 Although the pumped storage technology has been relatively mature, 4,5 the fixed-speed pumped storage unit (FSPSU) has some limitations compared with the variable-speed pumped storage unit (VSPSU). 6,7 The VSPSU with doubly fed induction machine (DFIM) 8 (hereinafter referred to as VSPSU) can operate asynchronously, so it has a much wider power regulation range than FSPSU in pump mode by operating at different unit speeds.…”