次同步谐振输出反馈的最优励磁控制

通过分析提出了一种SSR(Subsychronous Resonance)励磁控制器的实用设计方法,通过直接优化输出反馈增益泛函的某一特定性能指标求取最优输出反馈参数.根据SSR系统的特点,给出输出反馈信息的选择原则,用一种有效的降阶方法将一24阶SSR模型降至15阶,设计了5个信号用于反馈的最优励磁控制器.特征值分析与计算机仿真结果表明,采用该方法设计的最优输出反馈励磁控制器对于大范围的串联电容补偿度,均能提供恰当的阻尼抑制SSR的全部振荡模式,从而使得多机系统SSR励磁控制器的设计问题得到较好的解决。

SUBSYNCHRONOUS RESONANCE EXCITATION CONTROLLING BY OPTIMAL OUTPUT FEEDBACK

Proposes and analyses a practical design method of SSR ( Subsynchronous Resonance ) excitation controller, with which the optimal output feedback parameters can be obtained by directly optimizing a special performance index as a function of the output feedback gains. According to some peculiarities of SSR system, a selecting principle for output feedback information is given. The full model with 24th order is reduced to a model with 15th order by an effective ready-made method, Five signals for output feedback are selected and then a optimal excitation controller is designed, Eigenvalue analysis and computer simulation shown;the designed controller can provide proper damping to check all SSR torsional modes for a large scope of compensate degree of series capacitor;so this method can satisf-atorily solve problems in designing multimachine SSR excitation controller.