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Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/F6FC1FFC-93E8-4153-8DEE-D4E98F4714C6 | ||
| Year | 2020 | ||
| Type of Item | Conference Publication | ||
| License |
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| Bibliographic Citation | S. Luo, W. Wu, H. Chung, F. Blaabjerg and E. Koutroulis, "A novel third-harmonic elimination method for VOC-based three-phase DC/AC inverter," in IECON 2020, pp. 3170-3175. doi: 10.1109/IECON43393.2020.9255320 https://doi.org/10.1109/IECON43393.2020.9255320 | ||
| Appears in Collections |
Virtual oscillator control (VOC) has been proposed for Microgrids, since compared to the droop control method, VOC has a faster transient response. However, the output voltage of the conventional VOC always contains the third-harmonic. Thus, in the grid-connected mode, the third-harmonic voltage causes the generation of significant third-harmonic current which is injected into the power grid. In this paper, by analyzing the nonlinear oscillator and simplifying the nonlinear current source in the oscillator, a novel VOC for three-phase DC/AC inverter is proposed, where the third-harmonic of the oscillator output voltage can be successfully eliminated, whether in the islanded or grid-connected mode of operation. In addition, compared with the traditional VOC, the dynamic response of the proposed VOC-based inverter can be significantly improved, especially in the islanded mode. Experimental device designed on the DSPACE DS1202 is developed to verify the feasibility of the proposed strategy.
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