Institutional Repository
Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/D96484D4-856A-4AEA-BC3C-88D56604E129 | ||
| Year | 2022 | ||
| Type of Item | Peer-Reviewed Journal Publication | ||
| License |
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| Bibliographic Citation | S. Luo, W. Wu, E. Koutroulis, H. S. -H. Chung and F. Blaabjerg, "A new Kalman-Filter-based harmonic current suppression method for the virtual oscillator controlled grid-tied inverter," IEEE J. Emerging Sel. Top. Circuits Syst., vol. 12, no. 1, pp. 251-259, March 2022, doi: 10.1109/JETCAS.2022.3141106. https://doi.org/10.1109/JETCAS.2022.3141106 | ||
| Appears in Collections |
Virtual Oscillator Control (VOC) is an advanced nonlinear grid-forming controller used for power electronics interfaced distributed generation (DG). In order to improve the reliability of voltage source converter connecting to the disturbance grid, a feedback method with enhanced virtual impedance had been inserted into the control loop of the VOC-based inverter to suppress grid-injected harmonic currents. In this paper, a new grid-injected harmonic current suppression strategy with estimated voltage feedforward is proposed for a VOC-based voltage source inverter (VSI) connected to the distorted electrical grid. To achieve the control target, the Kalman-Filter is adopted to estimate the harmonic components of the grid voltage at the point of common coupling (PCC) and insert them to the feedforward control loop of the VOC-based inverter. Compared with the traditional VOC with enhanced virtual impedance method, the proposed control strategy has a slightly better ability to suppress the grid-injected harmonic current. A 3 kW/3-phase/120 V experimental prototype system designed on the DSPACE DS1202 platform has been developed to verify the effectiveness of the proposed control strategy.
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