| The human demand for energy is increasing with the progress of human society and the development of science.In recent years,wind,solar and wave energy have been gradually developed and utilized.China has a wealth of wave energy resources,wave energy is an indispensable part of renewable energy.Therefore,the study of wave generation system has very important practical significance.The wave power changes with the change of environment and climatic conditions,so it is unpredictable.The application of flywheel-battery hybrid energy storage system can make output power stable when input power fluctuates,effectively improving the dynamic power quality.Adopting this structure can make full use of the advantages of the two energy storage technologies,meeting the requirements of energy storage capacity and speed.The coordinated stable control of hybrid energy storage system is studied in this article.As follows:(1)The research status home and abroad,working principle,working characteristics and development of flywheel energy storage,battery energy storage and wave generation are introduced.(2)The models of flywheel energy storage system,battery energy storage system are built.The corresponding converter topology is proposed,and the working principle and control methods are studied.The principle and control method of maximum power point tracking is introduced.(3)The flywheel-battery energy storage system is applied to wave power system.The wave power containing hybrid energy storage system topology is put forward.The charge and discharge control strategy of hybrid energy storage system is proposed.Hybrid energy storage controller and its control algorithm are designed.(4)The grid-connected topology and its characteristics are analyzed.The coordinated control strategy at variable time scales is put forward.The simulation model is built and simulation research is carried out. |
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