Optimization of Energy Storage Box Mechanical Structure and Grid-Connected Generation Control Strategy for Mechanical Elastic Energy Storage
Zheng Xiaoming1, Mi Zengqiang2, Yu Yang2, Jia Yulong2, Liu Liqing3
1. State Grid Shanxi Electric Power Company Economic and Technical Research InstituteTaiyuan 030001 China; 2. State Key Laboratory of Alternate Electrical Power System with Renewable Energy SourceNorth China Electric Power University Baoding 071003 China; 3. State Grid Tianjin Electric Power Company Electric Power Research InstituteTianjin 300000 China
Abstract The mechanical elastic energy storage box is the energy storage element of the mechanical elastic energy storage unit. This paper proposes a new mechanical assembly technology based on push and pull structure. On the basis of the traditional energy storage box group "hand and hand" mechanical linkage structure, the unidirectional overrunning clutch takes the place of the coupling between the traditional energy storage boxes, which realizes the flexible linkage of the storage box group and has the function of anti-reverse self-locking. A mathematical model of the rated power and energy storage capacity of the storage box is set up. An adaptive speed control algorithm for permanent magnet synchronous generator is proposed, and a unit power factor backstepping control algorithm for grid side converter is also proposed. The experimental results show that this method can effectively suppress the disturbance of unit parameters. The power generation process of PMSG can be carried out smoothly, the DC side voltage of the grid side converter is stable, and the unit power factor grid-connected control is realized to ensure the maximum output of the device and reduce the capacity of converter.
Zheng Xiaoming,Mi Zengqiang,Yu Yang等. Optimization of Energy Storage Box Mechanical Structure and Grid-Connected Generation Control Strategy for Mechanical Elastic Energy Storage[J]. Transactions of China Electrotechnical Society, 2019, 34(22): 4708-4718.
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2019, Vol. 34 
