基于误差最小化射影控制的降阶高压直流鲁棒控制器
发布时间：2019-06-10 04:29
【摘要】：鲁棒控制方法可用于高压直流附加阻尼控制器的设计,用以抑制交直流系统低频振荡,但目前普遍存在控制器阶数过高的问题,对实用性影响较大。为此提出对H2/H∞鲁棒控制器进行降阶的动态射影控制方法,并对降阶过程中产生的误差进行优化。首先利用总体最小二乘-旋转不变子空间(total least squares-estimation of signal parameters via rotational invariance techniques,TLS-ESPRIT)方法对系统进行低频振荡特性辨识,在此基础上利用主模比指标选择合适的反馈信号;然后利用H2/H∞鲁棒控制理论设计状态反馈鲁棒控制器;最后应用动态射影控制进行降阶,同时利用共轭梯度法对由FH范数评价的误差系统进行优化,得到最优低阶输出反馈控制器。仿真结果表明基于误差最小化射影控制的降阶高压直流鲁棒控制器在不同扰动与故障下都能有效抑制系统的低频振荡,鲁棒性和控制性能强,同时控制器阶数低,适合于实际工程推广应用。
[Abstract]:The robust control method can be used in the design of HVDC additional damping controller to suppress the low frequency oscillation of AC / DC system, but at present, there is a problem that the order of the controller is too high, which has a great influence on the practicability. In this paper, a dynamic projective control method for reducing the order of H _ 2 鈮，
本文编号：2496171
[Abstract]:The robust control method can be used in the design of HVDC additional damping controller to suppress the low frequency oscillation of AC / DC system, but at present, there is a problem that the order of the controller is too high, which has a great influence on the practicability. In this paper, a dynamic projective control method for reducing the order of H _ 2 鈮，
本文编号：2496171
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