Abstract：To improve the contribution of distributed inverter based on power electronic interface to the required inertia of power system for stability,a novel overall control strategy based on virtual synchronous generator (VSG) is designed. The outside control of distributed inverter is constructed by using synchronous generator’s rotor motion equation,primary frequency regulation feature and the delay characteristic of reactive power regulation. The proportional resonant controller which has better tracking performance is adopted in the bottom control. Then the small-signal models of inverter with grid-connected and autonomous working mode are established. The impact of main control parameters on system stability and dynamic response is analyzed according to the state matrix eigenvalue and sensitivity calculation. Correctness of the proposed methods is verified by Digital simulation and practical experiment. The results show that the distributed inverter can work in two modes of grid-connected and autonomous. And the change of reactive power has little influence on active power. The established small-signal model can be used for system stability analysis and related control parameters optimal design.
孟建辉，王毅，石新春，付超，李鹏. 基于虚拟同步发电机的分布式逆变电源控制策略及参数分析[J]. 电工技术学报, 2014, 29(12): 1-10.
Meng Jianhui,Wang Yi,Shi Xinchun,Fu Chao,Li Peng. Control Strategy and Parameter Analysis of Distributed Inverters Based on VSG. Transactions of China Electrotechnical Society, 2014, 29(12): 1-10.
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2014, Vol. 29 
