Abstract
The current control of three-phase grid-connected converters is typically carried out by using a proportional-resonant controller or synchronous reference frame (SRF) proportional-integral regulator. The implementation of these controllers often requires knowledge of the grid voltage frequency/phase angle, which is typically provided by a synchronization unit. It implies that dynamics and possible inaccuracies of the synchronization unit have a considerable impact on the current controller performance. The aim of this letter is to design an adaptive current controller by using a conventional SRF phase-locked loop. In this way, the current controller and synchronization part are merged into a single unit, which results in a simpler and more compact structure. The effectiveness of the proposed controller is verified using experimental results.
Original language | English |
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Article number | 7959117 |
Journal | IEEE Transactions on Power Electronics |
Volume | 33 |
Issue number | 2 |
Pages (from-to) | 911-916 |
Number of pages | 6 |
ISSN | 0885-8993 |
DOIs | |
Publication status | Published - Feb 2018 |
Keywords
- Current control
- Distributed generation (DG) systems
- Phase-locked loop (PLL)
- Power converters
- Synchronization
- distributed generation systems
- power converters
- synchronization
- phase-locked loop (PLL)