针对含静止无功发生器(SVG)的双馈风机(DFIG)系统中的次同步振荡，提出了一种针对转子侧变流器(RSC)的反馈线性化控制方法，并分析验证了其在小/大扰动下的振荡抑制效果。首先，建立了含SVG的双馈系统22阶时域模型；其次，结合反馈线性化原理，针对RSC内环控制设计了相应的控制方法。再次，对比了小扰动下，不同参数变化时，PI控制与反馈线性化控制对系统稳定性的影响。最后，考虑限幅环节作用，分析了大扰动下，系统RSC内环采用PI控制和反馈线性化控制时的稳定性。结果表明，反馈线性化控制能有效增大平衡点的吸引域，提升系统稳定性。

To the sub-synchronous oscillation in the doubly fed induction generator (DFIG) system with static var generator (SVG), a feedback linearization control method for the rotorside converter (RSC) is proposed, and its oscillation mitigation effect under small/large disturbances is analyzed and verified. Firstly, a 22-order time-domain model of a DFIG system with SVG is established. Secondly, combined with the principle of feedback linearization, the corresponding control method is designed for RSC inner loop control. Thirdly, the effects of PI control and feedback linearization control on the system stability are compared when different parameters change under small disturbance. Finally, considering the effect of the limiting link, the stability of the system RSC inner loop using PI control and feedback linearization control under large disturbance is analyzed. The results show that the feedback linearization control can effectively increase the attraction domain of the equilibrium point and improve the system stability.

国网福建省电力有限公司科技项目(52130N20000J)