scholarly journals A resonant damping control and analysis for LCL-type grid-connected inverter

2022 ◽  
Vol 8 ◽  
pp. 911-928
Author(s):  
Danish Khan ◽  
Pengfei Hu ◽  
Salman Habib ◽  
Muhammad Waseem ◽  
Zhenzhi Lin ◽  
...  
Keyword(s):  
Damping Control ◽  
Grid Connected Inverter

Adaptive Notch Filter Based Active Damping Control for Grid-Connected Inverter

2014 ◽  
Vol 986-987 ◽  
pp. 1169-1172
Author(s):  
Ping Wang ◽  
Meng Meng Cai
Keyword(s):  
Notch Filter ◽  
Active Damping ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Adaptive Notch Filter ◽  
Attenuation Characteristic ◽  
Damping Control ◽  
Grid Impedance ◽  
Grid Connected Inverter ◽  
Active Damping Control

The LCL filter is widely applied as interface between grid-connected inverter and grid due to the preferable high frequency attenuation characteristic. Under the condition of weak grid, impedance value of grid model cannot be ignored, the existence of grid impedance results in different LCL resonant frequencies, which will arise challenges of traditional active damping control. Based on the analysis of band pass filter using active damping control strategy, an adaptive active damping control is proposed in this paper by introducing the application of active notch filter, which can adjust the position of negative resonance point adaptively so as to manage sudden grid changes. Theoretical analysis and simulation results presented on the platform of grid-connected PV inverter system indicate the effectiveness and adaptability of this active damping strategy.

An Active Damping Control Method for the LLCL Filter-Based SiC MOSFET Grid-Connected Inverter in Vehicle-to-Grid Application

2019 ◽  
Vol 68 (4) ◽  
pp. 3411-3423 ◽  
Author(s):  
Yitao Liu ◽  
Dianheng Jin ◽  
Shiqi Jiang ◽  
Weihua Liang ◽  
Jianchun Peng ◽  
...  
Keyword(s):  
Control Method ◽  
Active Damping ◽  
Vehicle To Grid ◽  
Damping Control ◽  
Grid Application ◽  
Grid Connected Inverter ◽  
Active Damping 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.

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