Askarian Abyaneh, Hossein

Firoozabadi, Mehdi Savaghebi

Guerrero, Josep M.

Lorzadeh, Iman

Iman Lorzadeh

Mehdi Savaghebi

Hossein Askarian Abyaneh

Josep M. Guerrero

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Active damping techniques for LCL-filtered inverters-based microgrids

LCL-type filters are widely used in gridconnected voltage source inverters, since it provides switching ripples reduction with lower cost and weight than the L-type counterpart. However, the inclusion of LCL-filters in voltagesource inverters complicates the current control design regarding system stability issues; because an inherent resonance peak appears due to zero impedance at that resonance frequency. Moreover, in grid-interactive low-voltage microgrids, the interactions among the LCL-filtered-based parallel inverters may result in a more complex multiresonance issue which may compromise the power quality and stability of the microgrid. Therefore, due to the effect of resonances on the system stability and power quality, this paper presents a state-of-the-art review of resonance characteristics and related issues in single- and multi-invertersystems. Furthermore, this paper introduces the different active damping approaches for grid-connected inverters with LCL filters, which are based on high-order filters and additional feedbacks methods. These techniques are analyzed and discussed in detail

Active Damping Techniques for LCL-Filtered Inverters-Based Microgrids

http://vbn.aau.dk/files/220091007/SDEMPED_Active_Damping_Techniques_for_LCL_Filtered.pdf

Active Damping Techniques for LCL-Filtered Inverters-Based Microgrids

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