交直流电力系统鲁棒H_∞控制器设计

Design of a Robust H_∞ Controller for AC/DC Transmission System

本文提出了一种可以在不同运行条件下增加系统阻尼的HVDC联络线H∞阻尼控制器设计方案。针对系统模型的不确定性和运行状态的变化,采用分子分母双扰动表达式和部分极点配置技术相结合的方法,以克服传统HVDC控制策略的局限性。在将交直流系统的高度非线性特性作为模型的“不确定性”处理后,设计出的控制器具有很好的鲁棒性。

In this paper a design scheme of HVDC liaison line H∞ damping controller is presented. Using which, the system damping under different operating conditions could be enhanced. Aiming at the uncertainty of system model and the variety of operation state, the method to combine the numerator denominator perturbation expression and the partial pole placement techniquc is adopted in order to tide over the localization of traditional HVDC control policy. A robust H, controller is successfully designed by means of treating the heavy non linear feature of AC/DC power system as model uncertainty.