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Technical University of Crete
Technical University of Crete
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| URI | http://purl.tuc.gr/dl/dias/138A4B41-9DB0-411B-832D-1BB7310F36A6 | - |
| Identifier | https://doi.org/10.1109/IECON43393.2020.9254598 | - |
| Identifier | https://ieeexplore.ieee.org/document/9254598 | - |
| Language | en | - |
| Extent | 6 pages | en |
| Title | Using Kalman filter to achieve online estimation of equivalent grid impedance and high bandwidth control for LCL-filtered grid-tied inverters | en |
| Creator | Cheng Yanqi | en |
| Creator | Wu Weimin | en |
| Creator | Chung Henry | en |
| Creator | Blaabjerg Frede | en |
| Creator | Koutroulis Eftychios | en |
| Creator | Κουτρουλης Ευτυχιος | el |
| Creator | Zhu Lixun | en |
| Publisher | Institute of Electrical and Electronics Engineers | en |
| Content Summary | In grid-tied DC/AC inverter applications, the equivalent grid impedance often varies widely, which may limit the bandwidth of the inverter control system. This paper introduces a new method to perform the online estimation of the equivalent grid impedance with a Kalman filter by observing the grid voltage and grid current, as well as the voltage at the point of common coupling (PCC). With the estimated grid impedance, a high control bandwidth can be achieved for the grid-tied inverter through online regulation of the proportional coefficient of a current controller. A MATLAB/Simulink model of a grid-tied single-phase inverter has been setup to demonstrate the effectiveness of the proposed method. The simulation results show that the online estimated impedance is accurate enough and the inverter system can continuously maintain a high bandwidth, even under weak grid operating conditions. | en |
| Type of Item | Δημοσίευση σε Συνέδριο | el |
| Type of Item | Conference Publication | en |
| License | http://creativecommons.org/licenses/by/4.0/ | en |
| Date of Item | 2022-01-03 | - |
| Date of Publication | 2020 | - |
| Subject | Kalman filter | en |
| Subject | Equivalent grid impedance | en |
| Subject | Online estimation | en |
| Subject | Fundamental component | en |
| Subject | LCL-filter | en |
| Subject | Grid-tied inverter | en |
| Bibliographic Citation | Y. Cheng, W. Wu, H. Chung, F. Blaabjerg, E. Koutroulis and L. Zhu, "Using Kalman filter to achieve online estimation of equivalent grid impedance and high bandwidth control for LCL-filtered grid-tied inverters," in IECON 2020, pp. 4247-4252. doi: 10.1109/IECON43393.2020.9254598. | en |
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