Abstract
In three-phase power and energy applications, the synchronous reference frame phase-locked loop (SRF-PLL) is a popular tool for synchronization purposes. The SRF-PLL can be easily and effectively customized for different scenarios by changing its loop filter. Recently, some supposedly different PLLs using the steady-state linear Kalman filter have been developed. The main aim of this letter is to analyze these PLLs. It is demonstrated that they are actually equivalent to some well-known SRF-PLL structures and, therefore, provide no advantage compared to them.
Original language | English |
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Article number | 8331945 |
Journal | I E E E Transactions on Industrial Electronics |
Volume | 65 |
Issue number | 12 |
Pages (from-to) | 9795-9800 |
Number of pages | 6 |
ISSN | 0278-0046 |
DOIs | |
Publication status | Published - 1 Dec 2018 |
Keywords
- Fixed-gain filter
- Kalman filter
- phase-locked loop (PLL)
- synchronization
- synchronous reference frame PLL (SRF-PLL)
- three-phase systems