Abstract

Integration of the doubly-fed induction generators (DFIGs) changes the existing low frequency oscillation (LFO) modes of power systems and introduces the LFO modes, which may be damped by the power system stabilizer (PSS) installed at the synchronous generators, or recently at the DFIGs. In this article, the state space equations including the transfer function of the DFIG-PSS are derived, based on which, the analytical expression of the functional eigen-sensitivity model is proposed. To improve the accuracy of the existing functional eigen-sensitivity, the eigenvalue increment is introduced to the iterative calculation of the transfer function increment. The optimization model of the DFIG-PSS parameters is formulated based on the functional eigen-sensitivity, which is solved by the interior point method. Finally, the damping effect of the DFIG-PSS on the critical modes is provided to validate the accuracy of the functional eigen-sensitivity model.

摘要

双馈感应发电机（DFIG）的集成改变了电力系统的现有低频振荡（LFO）模式，并引入了LFO模式，该频率可能会因安装在同步发电机上的电力系统稳定器（PSS）而受到抑制，或者在最近出现在DFIG。本文推导了包含DFIG-PSS传递函数的状态空间方程，并在此基础上提出了功能本征敏感性模型的解析表达式。为了提高现有功能本征灵敏度的准确性，将本征值增量引入传递函数增量的迭代计算中。基于功能本征敏感性，建立了DFIG-PSS参数的优化模型，并通过内点法求解。最后，