风电机组虚拟惯量控制的应用方法研究

分析了风电机组参与电网调频存在的特点和限制，从频率事件检测、风机转速保护、风机转速恢复三个方面对已有虚拟惯量控制方法进行了优化，提出了一种实用的风电虚拟惯量控制方法，并给出了该方法在实际风机中应用的具体步骤，最后通过仿真分析和实验测试，验证了所提方法在实际风机中应用的可行性。仿真和实验结果表明，基于所提的虚拟惯量控制方法，风电机组能够在有效参与系统调频电网调频后及时平稳地恢复到最优转速运行，从而提高风电机组的发电效率， 并为参与下一次调频控制提供了条件。

Research on the application of virtual inertia control of wind turbines

The characteristics and restrictions of the wind turbines participating in frequency regulation of the power grid were analyzed. The original virtual inertia control method of wind power was optimized from three as- pects including frequency event detection, wind turbine rotate speed protection and wind turbine rotate speed recovery. A practical virtual inertia control method of wind power was proposed with its specific execution steps suggested in the actual application of the wind turbines. At last, the feasibility of the proposed method in practi- cal application of the wind power was verified through simulation analysis and experiments. The results of simu- lation analysis sand experiment show that,based on the proposed virtual inertia control method, the wind tur- bine can steadily recover the optimal rotating speed in time after effectively participating in the frequency mo- dulation of the grid system, so as to improve the power generation efficiency of the wind turbine and provide conditions for participating in the next frequency modulation.