Abstract
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.
Originalsprog | Engelsk |
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Titel | Proceedings of IECON 2020 : The 46th Annual Conference of the IEEE Industrial Electronics Society |
Antal sider | 6 |
Forlag | IEEE Press |
Publikationsdato | sep. 2020 |
Sider | 4247-4252 |
Artikelnummer | 9254598 |
ISBN (Elektronisk) | 978-1-7281-5414-5 |
DOI | |
Status | Udgivet - sep. 2020 |
Begivenhed | IECON 2020 - 46th Annual Conference of the IEEE Industrial Electronics Society - Online Varighed: 18 okt. 2020 → 21 okt. 2020 https://www.iecon2020.org/ |
Konference
Konference | IECON 2020 - 46th Annual Conference of the IEEE Industrial Electronics Society |
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Lokation | Online |
Periode | 18/10/2020 → 21/10/2020 |
Internetadresse |
Navn | Proceedings of the Annual Conference of the IEEE Industrial Electronics Society |
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ISSN | 1553-572X |