大容量双馈风电机组虚拟惯量调频技术

Control strategy of virtual inertia frequency regulation for large capacity DFIG-based wind turbine

针对风电机组不主动参与电网频率调节的问题,量化评估了大容量双馈风电机组利用风轮旋转动能进行调频的能力,提出了基于附加转矩的风电机组虚拟惯量调频控制方法,并研究了其实现原理与控制策略,建立了大容量双馈风电机组Bladed+MATLAB联合仿真模型,实现了虚拟惯量调频全过程动态仿真。首次在MW级风电机组上进行了虚拟惯量调频现场试验,揭示了大容量风电机组虚拟惯量调频的动态特性与技术特点。试验结果表明了理论与仿真分析的准确性及控制策略的有效性。

In order to solve the problem that the wind turbines do not initiatively participate in the frequency regula- tion of power grid, the capability of large-capacity DFIG-WT （ DFIG-based Wind Turbine） using stored inertia energy of the rotor to participate in the frequency regulation of the power grid is evaluated. A control strategy of virtual iner- tia frequency regulation of wind turbine based on accessory torque is proposed, and its implementation principles and control strategies are stu-died respectively. A Bladed and MATLAB co-simulation system of large-capacity DFIG-WT is established, realizing the whole process dynamic simulation of virtual inertia frequency regulation. The field test is carried out on a MW class DFIG-WT by large capacity grid emulator for the first time, and the dynamic and technical characteristics of the virtual inertia frequency regulation are revealed. The simulative and experimental results support the theoretical analysis and verify the proposed control strategy.