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Modeling and Stability Analysis of $LCL$ -Type Grid-Connected Inverters: A Comprehensive Overview
- Source :
- Han, Y, Yang, M, Li, H, Yang, P, Xu, L, Coelho, E A A & Guerrero, J M 2019, ' Modeling and stability analysis of LCL-type grid-connected inverters : A comprehensive overview ', IEEE Access, vol. 7, 2935806, pp. 114975-115001 . https://doi.org/10.1109/ACCESS.2019.2935806, IEEE Access, Vol 7, Pp 114975-115001 (2019)
- Publication Year :
- 2019
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2019.
-
Abstract
- Due to the advantages of superior harmonics attenuation ability and reduced size, the LCL filter has been widely adopted to interface between the inverter and the grid for improving the quality of injected grid currents. However, the high-order characteristics and various constraints of the LCL filter complicate the filter design. Moreover, the stability of the internal current control loop of the individual inverter is susceptible to the inherent LCL -filter resonance peak. Meanwhile, the overall system stability would be aggravated by the external interactions between the inverter and the weak grid as well as among the paralleled inverters. Both the LCL -filter resonance peak and two types of interaction would cause severely distorted grid currents. Motivated by the existing problems, a comprehensive review on the modeling and stability analysis of the LCL -type grid-connected inverters is conducted in this paper. Concretely, the generalized parameter constraints of the LCL filter are outlined to facilitate the passive components selection, and the magnetic integration techniques of filter inductors are also introduced to reduce the weight and size of filter for increasing the power density of the system. Then, the various damping methods for enhancing the individual internal stability and the relevant application issues are also discussed. Furthermore, the impedance-based method for evaluating the system-level interactive stability is subsequently reviewed, with the emphasis on different modeling methods of inverter output impedance and online impedance measurement techniques. Finally, the future research trends on the modeling and stability analysis of LCL -type grid-connected inverters are also presented.
- Subjects :
- General Computer Science
damping methods
delay
Computer science
Impedance-based stability analysis
020209 energy
Impedance measurement
Damping methods
02 engineering and technology
Inductor
Impedance modeling
Control theory
LCL-filter
grid-connected inverters
0202 electrical engineering, electronic engineering, information engineering
General Materials Science
Output impedance
parameters design
Electrical impedance
Power density
Delay
Focused Impedance Measurement
Magnetic integration
020208 electrical & electronic engineering
Grid-connected inverters
General Engineering
Resonance
Grid
Filter design
Filter (video)
Harmonics
Control system
Inverter
lcsh:Electrical engineering. Electronics. Nuclear engineering
lcsh:TK1-9971
Stability
magnetic integration
Parameters design
Subjects
Details
- ISSN :
- 21693536
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- IEEE Access
- Accession number :
- edsair.doi.dedup.....2233db7c9332f99f176dc85539174fec