A New Weighted Average Current Control Strategy for System Reduction

2019 ◽  
Author(s):  
Qiang Wu ◽  
Xinluo Li ◽  
Jiaxing Yu ◽  
Wang Han
Keyword(s):  
Control Strategy ◽  
Weighted Average ◽  
Current Control ◽  
System Reduction ◽  
Average Current ◽  
Average Current Control

scholarly journals Weighted average current method for active damping control based on grid voltage feed-forward

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Shengqing Li ◽  
Xinluo Li ◽  
Xiaobao Lee
Keyword(s):  
Control Strategy ◽  
Weighted Average ◽  
Stability Margin ◽  
Current Control ◽  
Power Network ◽  
Weak Current ◽  
Damping Control ◽  
Average Current ◽  
Grid Connected Inverter ◽  
The Stability

AbstractIn the weak current network environment, the existence of power network impedance will reduce the current control stability margin of LCL grid connected inverter, the stability margin will gradually deteriorate as the inductive component of the power network impedance increases, leading to system instability. In this paper, an improved weighted average current control strategy is proposed, which is based on the active damping control of the voltage feedforward of the charged network. In the new control strategy, with the zero-pole cancellation method, a new weighting coefficient related only to the parameters of LCL filter is obtained, which reduces the order of the system, suppresses the influence of power network impedance, and improves the stabilization of the system, getting better inverter output current quality. Then the influence of power network impedance on the control system of grid connected inverter is analyzed, and the feed-forward control of grid voltage is improved to improve the stability of inverter in weak current network. The Bode diagram analysis and MATLAB simulation results proved that the proposed control strategy is feasible.

Weighted Average Current Control in a Three-Phase Grid Inverter With an LCL Filter

2013 ◽  
Vol 28 (6) ◽  
pp. 2785-2797 ◽  
Author(s):  
Ning He ◽  
Dehong Xu ◽  
Ye Zhu ◽  
Jun Zhang ◽  
Guoqiao Shen ◽  
...  
Keyword(s):  
Weighted Average ◽  
Current Control ◽  
Lcl Filter ◽  
Three Phase ◽  
Average Current ◽  
Average Current Control
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