Zhang, Chi1; Dragicevic, Tomislav3; Vasquez, Juan Carlos3; Guerrero, Josep M.2
1 The Faculty of Engineering and Science, Aalborg University, VBN2 Department of Energy Technology, The Faculty of Engineering and Science, Aalborg University, VBN3 Power Electronic Systems, The Faculty of Engineering and Science, Aalborg University, VBN
LCL filters play an important role in grid-connected converters when trying to reduce switching-frequency ripple currents injected into the grid. Besides, their small size and low cost make them attractive for many practical applications. However, the LCL filter is a third-order system, which presents a resonance peak frequency. Oscillation will occur in the control loop in high frequency ranges, especially in current loop in double-loops controlled converters. In order to solve this, many strategies have been proposed to damp resonance, including passive and active methods. This paper makes a review of these methods.
Proceedings of the 2014 Ieee International Energy Conference (energycon), 2014, p. 169-176
LCL filter; Active damp methods; Passive damp method; Grid-connected inverter
Main Research Area:
I E E E International Energy Conference. Energycon Proceedings
2014 IEEE International Energy Conference (ENERGYCON), 2014