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电网技术  2014 

多通道高压直流附加鲁棒控制器设计

DOI: 10.13335/j.1000-3673.pst.2014.04.006, PP. 858-864

Keywords: 鲁棒控制,多通道,线性矩阵不等式,高压直流附加控制

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Abstract:

通过总体最小二乘-旋转不变技术辨识出系统降阶模型及相关振荡频率,再基于线性矩阵不等式的鲁棒控制设计方法,设计出针对不同振荡模式的多通道附加高压直流控制器。控制器利用平衡截断法进行降阶,兼顾了最优性能和鲁棒性能,且可以同时抑制低频振荡与次同步振荡。控制信号经巴特沃兹滤波器后由各通道明确定位,降低了控制器间的相互影响。最后,设计了传统比例积分微分(proportionintegrationdifferentiation,PID)控制器进行比较。仿真实验表明,多通道鲁棒控制器对于多种振荡模式的同时抑制效果良好,具有较强的鲁棒性,同时控制器采用输出反馈形式,便于工程实践。

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