Virtual impedance-based active damping for LCL resonance in grid-connected voltage source inverters with grid current feedback

2016 ◽  
Author(s):  
Teng Liu ◽  
Zeng Liu ◽  
Jinjun Liu ◽  
Zipeng Liu
Keyword(s):  
Active Damping ◽  
Voltage Source ◽  
Current Feedback ◽  
Voltage Source Inverters ◽  
Grid Current ◽  
Virtual Impedance

scholarly journals Active damping method for voltage source inverter-based distributed generator using multivariable finite-control-set model predictive control

2021 ◽  
Vol 12 (1) ◽  
pp. 334
Author(s):  
Jonggrist Jongudomkarn ◽  
Warayut Kampeerawat
Keyword(s):  
Model Predictive Control ◽  
Predictive Control ◽  
Active Damping ◽  
Superior Performance ◽  
Voltage Source ◽  
Lcl Filter ◽  
Grid Voltage ◽  
Grid Current ◽  
Finite Control ◽  
Control Set

Despite its advantages, the LCL filter can significantly distort the grid current and constitute a substantially more complex control issue for the grid-connected distributed generators (DGs). This paper presents an active damping approach to deal with the LCL filter's oscillation for the finite-control-set model predictive control (FCS-MPC)-three-phase voltage source inverters (VSIs)-based DG. The new approaches use the multivariable control of the inverter side's filter current and capacitor voltage to suppress the LCL filter resonance. The proposed method has been tested in steady-state and under grid voltage disturbances. The comparative study was also conducted with the existing virtual resistance active damping approaches for an FCS-MPC algorithm. The study validates the developed control schemes' superior performance and shows its ability to eliminate lower-order grid current harmonics and decrease sensitivity to grid voltage distortion.

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