Underwater pumped hydro storage(UPHS)is a novel energy storage method suitable for marine environments.To address the problem of imprecise UPHS models and limited applicability,this study presents a hydraulic-mechanical-electrical multilink transient model and conducts associated research.Firstly,we analyze and establish the physical model of UPHS components,including the pump-turbine,governor,motor,and converter.Subsequently,we design the control strategies for the prime mover and grid-connected converter.Finally,this paper performs electromagnetic transient simulations for stand-alone grid-connected UPHS and offshore wind power-UPHS bundling transmission scenarios under various working conditions.Simulation results confirm the model's reliability and demonstrate that underwater pumped hydro storage is feasible for smoothing offshore wind output power.
关键词
水下抽水蓄能/暂态模型/全功率变频控制/水下储能/海上风电
Key words
underwater pumped hydro storage(UPHS)/transient model/complete power converter control/underwater energy storage/offshore wind power
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