基于誤差最小化射影控制的降階高壓直流魯棒控制器
發(fā)布時間:2019-06-10 04:29
【摘要】:魯棒控制方法可用于高壓直流附加阻尼控制器的設(shè)計,用以抑制交直流系統(tǒng)低頻振蕩,但目前普遍存在控制器階數(shù)過高的問題,對實用性影響較大。為此提出對H2/H∞魯棒控制器進(jìn)行降階的動態(tài)射影控制方法,并對降階過程中產(chǎn)生的誤差進(jìn)行優(yōu)化。首先利用總體最小二乘-旋轉(zhuǎn)不變子空間(total least squares-estimation of signal parameters via rotational invariance techniques,TLS-ESPRIT)方法對系統(tǒng)進(jìn)行低頻振蕩特性辨識,在此基礎(chǔ)上利用主模比指標(biāo)選擇合適的反饋信號;然后利用H2/H∞魯棒控制理論設(shè)計狀態(tài)反饋魯棒控制器;最后應(yīng)用動態(tài)射影控制進(jìn)行降階,同時利用共軛梯度法對由FH范數(shù)評價的誤差系統(tǒng)進(jìn)行優(yōu)化,得到最優(yōu)低階輸出反饋控制器。仿真結(jié)果表明基于誤差最小化射影控制的降階高壓直流魯棒控制器在不同擾動與故障下都能有效抑制系統(tǒng)的低頻振蕩,魯棒性和控制性能強(qiáng),同時控制器階數(shù)低,適合于實際工程推廣應(yīng)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,
本文編號: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,
本文編號:2496171
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