双馈风电机组有功-无功混合调制阻尼控制

A Hybrid Power Modulation Damping Controller for Doubly-Fed Induction Generator

目前风电机组系统级阻尼控制中均采用单一有功调制或无功调制,无法兼顾系统阻尼和轴系振荡阻尼。为解决上述问题,针对双馈风电机组提出了有功-无功混合调制阻尼控制器,并提出了序贯优化算法设计阻尼控制器参数,通过特征值分析和时域仿真验证了该控制器在风电机组不同运行模式下的有效性和鲁棒性。结果表明,相比于单一调制,混合调制更能充分利用双馈风电机组转子侧变换器的阻尼控制能力,同时最小化对风电机组本身轴系振荡阻尼的不利影响。

Either active power modulation （APM） method or reactive power modulation （RPM） method has been proposed in variable speed wind turbine generators （WTGs） to damp power system low-frequency oscillations. However, these two methods fail to account for both system damping and torsional damping simultaneously. To address the above problems, a hybrid power modulation （HPM） damping controller consisting of both APM and RPM components is proposed for doubly-fed induction generator （DFIG） in this paper and a sequential optimization algorithm is developed to tune parameters of the controller. The effectiveness and robustness of the controller with respect to various typical operating points is verified by means of eigenvalue analysis and time-domain simulations. It is shown that compared with APM or RPM alone, HPM can better make full use of the damping control capability of rotor-side controller of DFIG and simultaneously minimize the adverse effects on torsional damping.