Recursive subspace identification approach of a closed-loop model

Author(s):  
Jia Wang ◽  
Hong Gu ◽  
Hongwei Wang
2021 ◽  
Vol 386 ◽  
pp. 114092
Author(s):  
Christoph M. Augustin ◽  
Matthias A.F. Gsell ◽  
Elias Karabelas ◽  
Erik Willemen ◽  
Frits W. Prinzen ◽  
...  

2018 ◽  
Vol 32 (34n36) ◽  
pp. 1840098
Author(s):  
Yuan Li ◽  
Huifang Shen ◽  
Chao Xiong ◽  
Yaofei Han ◽  
Guofeng He

In order to eliminate the effect on the grid current caused by the background harmonic voltage and the reference signal on the grid connected multi-inverter, this paper adopts the double closed-loop feed-forward control strategy. This strategy is based on the inductor voltage and the grid-connected current, and the integrated control strategy of quasi-proportional resonance loop parallel to a specific harmonic compensation loop. Based on the closed-loop model of multiple inverters, the change curves of the transfer function of the two control strategies are compared with the feed-forward control and the composite proportional resonance. The two corresponding control methods are used to analyze the current quality of the multi-inverter impact. Finally, the MATLAB/Simulink simulation model is set up to verify the proposed control strategies. The simulation results show that the proposed method can achieve better tracking of the sinusoidal command signal at the fundamental frequency, and enhance the anti-interference ability of the system at the 3rd, 5th, and 7th harmonic frequency.


2018 ◽  
Vol 49 (9) ◽  
pp. 1821-1835 ◽  
Author(s):  
Youqing Wang ◽  
Ling Zhang ◽  
Yali Zhao

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