双馈风机虚拟惯量控制对传动系统扭振影响

Influence of inertia response control of wind turbine with doubly fed induction generator on drive train torsional vibration

虚拟惯量控制是双馈风电机组参与频率控制,改善电力系统频率响应的有效措施。基于虚拟惯量控制的基本原理,研究了双馈风电机组虚拟惯量控制对传动系统扭振的影响。针对风机传动系统2质块和3质块模型,分析了双馈风电机组虚拟惯量控制引起传动系统扭振的机理,表明了虚拟惯量控制可能激发传动系统弱阻尼扭振模式,从而引起比较明显的扭振。针对上述问题,设计了一种扭振阻尼控制器,该控制器能够有效增加传动系统扭振模式的阻尼,从而抑制虚拟惯量控制所引起的传动系统扭振。仿真算例验证了双馈风电机组虚拟惯量控制对传动系统扭振影响分析结论以及扭振阻尼控制器的有效性。

Inertia response control of wind turbine with doubly fed induction generator is an effective way to participate in frequency control, and thus improve power system frequency response. Based on inertia control theory, the influence of inertia response control of DFIG-Based WTGs on drive train torsional vi-brations was investigated. Through the two-mass and three-mass models of drive train, the mechanism that how the inertia response control could cause drive train torsional vibrations was analyzed. It is shown that inertia response control of DFIG-Based WTGs could excite the weakly damped torsional mode, resul-ting in torsional oscillation. Furthermore, a torsional damping controller was also proposed which could increase the damp of the drive train torsional modes, and thus damp drive train torsional vibrations caused by inertia response control. Simulation results verified the analysis of the impact of inertia response con-trol of DFIG-Based WTGs on drive train torsional vibrations, and the effectiveness of the proposed torsion-al damping controller.