研究尖速比对虚拟同步发电机（VSG）控制下双馈风电机组调频效果的影响,以优化不同工况的控制策略。首先,分析减载双馈风电机组系统的基本控制模型,结合VSG建立包含尖速比变量的双馈风电机组调频系统小信号模型;其次,使用该模型来推导风力发电机组在小信号条件下的等效惯性和尖速比之间的关系方程,根据伯德图和特征根的根轨迹图分析尖速比对VSG控制的双馈风电系统调频动态特性,确定不同尖速比运行下虚拟同步机控制的惯量响应;最后,在Matlab/Simulink中搭建四机二区域模型进行时域仿真,仿真结果验证理论分析的正确性。
Abstract
The influence of tip speed ratio on the frequency regulation effect of doubly-fed wind turbine under the control of virtual synchronous generator（VSG） is studied to optimize the control strategy under different working conditions. Firstly, the basic control model of the load shedding doubly-fed wind turbine system is analyzed, and the small signal model of the frequency modulation system of the doubly-fed wind turbine with the tip speed ratio variable is established by combining the VSG. Secondly, the model is used to derive the relationship equation between the equivalent inertia and the tip speed ratio of the wind turbine under small signal conditions. According to the Bode diagram and the root locus diagram of the characteristic root, the dynamic characteristics of the tip speed ratio on the frequency modulation of the VSG-controlled doubly-fed wind power system are analyzed, and the inertia response of the virtual synchronous machine control under different tip speed ratios is determined. Finally, a four-machine two-area model is built in Matlab/Simulink for time domain simulation, and the simulation results verify the correctness of the theoretical analysis.
关键词
风力发电 /
电机控制 /
虚拟电厂 /
小信号模型 /
叶尖速比
Key words
wind power /
electric machine control /
virtual power plant /
small signal model /
tip speed ratio
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基金
可再生能源并网全国重点实验室开放基金项目（NYB51202301626）
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