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An Adaptive Virtual Synchronous Generator Control Method on Dynamic Response Characteristic Optimization
Received:November 30, 2018  Revised:January 29, 2019
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Keywords:virtual synchronous generator  virtual inertia  virtual damping  grid strength  adaptive control  power disturbance method  hard-ware-in-the-loop
Fund Project:National Key Research and Development Program of China
ZHANG Qian Wind Power Research Center, Shanghai Jiao Tong University Edmund@sjtu.edu.cn
CAI Xu Wind Power Research Center, Shanghai Jiao Tong University xucai@sjtu.edu.cn
LI Zheng School of Information Science and Technology, Donghua University
RAO Fangquan Shanghai Jiao Tong University
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      The virtual synchronous generator (VSG) in microgrid is required to shift between the grid-connected state and micro-grid state and to keep good dynamic response characteristics under different working points. However, the parameters of VSG are designed based on the rated working point and remain constant in different grid conditions. An adaptive VSG control method on dynamic response characteristic optimization is proposed in this paper, which can adjust VSG parameters by measuring grid impedance during power disturbances, so that VSG can have concordant dynamic response characteristics under different grid conditions. A microgrid model is established on the real-time-digital-system (RTDS) and DSP united hardware-in-the-loop platform, which contains PV, BESS and diesel generator, experi-ment results demonstrate the effectiveness of the proposed method.