正负励磁控制系统最优参数选择

CHOICE OF OPTIMAL PARAMETERS OF A POSITIVE AND NEGATIVE EXCITATION CONTROLLER

简单介绍了正负励磁系统及其控制系统；详细地建立了考虑凸极效应并带有高压直流输电系统的大型水轮发电机组的线性化模型以及带有电力系统稳定器（ＰＳＳ）的正负励磁控制系统的数学模型；探讨了根据最优控制二次项性能指标来设计励磁控制系统最优参数的方法；分析研究了正负励磁控制系统在所述方法选择的控制参数作用下的响应特性。通过仿真分析表明：利用二次型性能指标来选择最优参数具有简单且作用效果明显等优点，是一种比较实用的设计方法。

This paper briefs the positive and negative excitation system(PNE)and its controller.The mathematical models, such as the linearized model of large hydrogenerater which takes thesalient pole effect into consideration with a HVDC system , and the PNE controller with a powersystem stabilizor(PSS),are built. Decision of the optimal parameters of the PNE controller ac-cording to the binomial function target is discussed. The response characteristics of the controlleracted by the parameters designed as above, are studied. The results prove that it is practical todesign the optimal control parameters according to the binomial function target.