Abstract
This paper presents an adaptive synchronization for current-controlled grid-connected inverter based on a time-domain virtual oscillator controller (VOC). Inspired by the phenomenon of dynamics of adaptive oscillator under the perturbation effect. Firstly, the fast learning rule of the oscillator frequency is derived in order to make the oscillator evolve to the grid voltage. Thus realizing a phase-locking behavior, but without requiring the use of a dedicated phase-locked loop (PLL). Then, the unit orthogonal components are obtained to generate the current reference, and a current loop is designed by using a PR controller in the αβ frame. Experimental results were obtained with comparison to PI current controller, showing the salient performances of the proposed method in front of grid frequency variations, voltage sags and swells.
Original language | English |
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Title of host publication | Proceedings of the APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition |
Number of pages | 6 |
Volume | 2018-March |
Publisher | IEEE Press |
Publication date | Mar 2018 |
Pages | 1130-1135 |
ISBN (Electronic) | 978-1-5386-1180-7 |
DOIs | |
Publication status | Published - Mar 2018 |
Event | 33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018 - San Antonio, United States Duration: 4 Mar 2018 → 8 Mar 2018 |
Conference
Conference | 33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018 |
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Country/Territory | United States |
City | San Antonio |
Period | 04/03/2018 → 08/03/2018 |
Sponsor | IEEE Power Electronics Society (PELS), Industry Applications Society (IAS), Power Sources Manufacturers Association (PSMA) |
Keywords
- Gird-connected inverter
- Dead-zone oscillator
- Adaptive synchronization
- Nonlinear control