Coordinated Control Strategy of Inertia Support and Primary Frequency Regulation of PMSG
Yan Xiangwu1, Wang Desheng1, Yang Linlin2, Jia Jiaoxin1, Li Tiecheng3
1. Hebei Provincial Key Laboratory of Distributed Energy Storage and Microgrid North China Electric Power University Baoding 071003 China; 2. Yuncheng Company State Grid Shanxi Electric Power Co. Ltd Yuncheng 044000 China; 3. State Grid Hebei Electric Power Research Institute Shijiazhuang 050021 China
Abstract On the basis of the traditional MPPT control, adding inertia support and primary frequency regulation can make grid-connected wind turbines show friendliness characteristics. It is very important to design the energy supply mode of regulation function reasonably, and the coordination control between different functions is the technical difficulty. The paper focuses on single grid-connected direct-driven wind turbine, proposing a coordinated control strategy of inertia support and primary frequency regulation over full-range of wind speed. By regulating the reference active power of the controller,the proposed strategy adopts the rotor kinetic energy to realize inertial support, and uses the additional energy storage device combining with variable power tracking control to provide the energy of primary frequency regulation. This proposed strategy not only can reduce the need of energy storage configuration, but also solves the problem of frequency secondary drop. Besides, it avoids the problems of energy loss and insufficient regulating margin which are caused by conventional spare capacity for load reduction. Finally, the feasibility and effectiveness of the theory are verified by simulation.
Yan Xiangwu,Wang Desheng,Yang Linlin等. Coordinated Control Strategy of Inertia Support and Primary Frequency Regulation of PMSG[J]. Transactions of China Electrotechnical Society, 2021, 36(15): 3282-3292.
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2021, Vol. 36 
