杨 赟,缪惠宇,梅 飞,张宸宇,陈虹妃,郑建勇.对称电压暂降情况下含无功补偿功能的虚拟同步发电机控制策略[J].电测与仪表,2019,56(1):53-59,75. Yang Yun,Miao Huiyu,Mei Fei,Zhang Chenyu,Chen Hongfei,Zheng Jianyong.Virtual Synchronous Generator Control Strategy with Reactive Power Compensation in Symmetrical Voltage Sagging[J].Electrical Measurement & Instrumentation,2019,56(1):53-59,75.
对称电压暂降情况下含无功补偿功能的虚拟同步发电机控制策略
Virtual Synchronous Generator Control Strategy with Reactive Power Compensation in Symmetrical Voltage Sagging
A new control strategy, virtual synchronous generator (VSG), can improve the friendliness of the distributed generator (DG) to the power grid by imitating the output characteristics of the traditional synchronous generator. However, the traditional VSG cannot suppress the fault current or provide reactive power support in the case of power grid failure. To solve this problem, the behavior of VSG in the process of symmetrical voltage sag is analyzed based on an established VSG model. After that, a control strategy, which can avoid overcurrent and transient current impact during the voltage sag fault, for VSG with maximum reactive power compensation is proposed. The control principles of the current limiting control method and setting principles of the specific parameters are also given. Finally, the correctness and feasibility of the proposed control strategy are verified by simulation.
