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Abstract
Active damping of LCL-filter resonance based on single-state feedback control is widely used with voltage source converters. Its robustness against grid impedance variation has always been a major concern with its controller design. To deal with this issue, this paper begins by developing a generalized impedance-based model of grid current control with feedback-type active damping. Then, a controller design method based on the z-domain root contours and frequency-domain passivity theorem is proposed. It not only allows a co-design of the grid current controller and damping controller, but ensures also a robust stabilization against the grid parameters variations. For illustration, the approach is applied to design three single-state feedback-damping schemes, and their damping robustness are compared under both inductive and resonant grid impedances. Experimental results validate the effectiveness of the method.
Original language | English |
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Title of host publication | Proceedings of the 2015 IEEE Energy Conversion Congress and Exposition (ECCE) |
Number of pages | 8 |
Publisher | IEEE Press |
Publication date | Sept 2015 |
Pages | 2629-2636 |
Article number | 7310029 |
ISBN (Print) | 978-1-4673-7151-3, 978-146737150-6 |
DOIs | |
Publication status | Published - Sept 2015 |
Event | 2015 IEEE Energy Conversion Congress and Exposition (ECCE) - Montreal, Canada Duration: 20 Sept 2015 → 24 Sept 2015 |
Conference
Conference | 2015 IEEE Energy Conversion Congress and Exposition (ECCE) |
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Country/Territory | Canada |
City | Montreal |
Period | 20/09/2015 → 24/09/2015 |
Keywords
- LCL-filters
- Passivity
- Voltage source converte
- Stability
- Active damping
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HARMONY: HARMONY - Harmonic identification, mitigation and control in power electronics based power systems
Blaabjerg, F., Bak, C. L., Wang, X., Beres, R. N., Kwon, J., Gui, Y., Yoon, C. & Ebrahimzadeh, E.
01/02/2013 → 28/02/2018
Project: Research