Abstract
| Original language | English |
|---|---|
| Journal | I E E E Transactions on Industrial Electronics |
| Volume | 66 |
| Issue number | 6 |
| Pages (from-to) | 4650 - 4660 |
| ISSN | 0278-0046 |
| DOIs | |
| Publication status | Published - 2018 |
Keywords
- Frequency estimation
- Bandpass filters
- Digital filters
Cite this
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Discrete-Time Complex Bandpass Filters for Three-Phase Converter Systems. / Guest, Emerson; Mijatovic, Nenad.
In: I E E E Transactions on Industrial Electronics, Vol. 66, No. 6, 2018, p. 4650 - 4660.Research output: Contribution to journal › Journal article › Research › peer-review
TY - JOUR
T1 - Discrete-Time Complex Bandpass Filters for Three-Phase Converter Systems
AU - Guest, Emerson
AU - Mijatovic, Nenad
PY - 2018
Y1 - 2018
N2 - A first-order complex bandpass filter (CBF) derived in the discrete frequency domain is proposed as a building block for the complex signal processing unit in three-phase converter systems. The first-order discrete CBF can be directly implemented in a digital system, is stable at all center frequencies and has a low computational burden. The first-order CBF is extended to a pth-order discrete CBF. A normalized frequency-locked loop (FLL) is then developed that allows the frequency adaption to satisfy a desired settling time regardless of the input signal magnitude or discrete CBF form. The pth-order discrete CBF-FLL was tested on an FPGA in the form of two industrial applications: voltage synchronization under grid fault and extraction of an unknown frequency component. The second-order discrete CBF-FLL offered significantly improved stopband attenuation and frequency estimation relative to the first-order discrete CBF-FLL, for a small increase in computational burden.
AB - A first-order complex bandpass filter (CBF) derived in the discrete frequency domain is proposed as a building block for the complex signal processing unit in three-phase converter systems. The first-order discrete CBF can be directly implemented in a digital system, is stable at all center frequencies and has a low computational burden. The first-order CBF is extended to a pth-order discrete CBF. A normalized frequency-locked loop (FLL) is then developed that allows the frequency adaption to satisfy a desired settling time regardless of the input signal magnitude or discrete CBF form. The pth-order discrete CBF-FLL was tested on an FPGA in the form of two industrial applications: voltage synchronization under grid fault and extraction of an unknown frequency component. The second-order discrete CBF-FLL offered significantly improved stopband attenuation and frequency estimation relative to the first-order discrete CBF-FLL, for a small increase in computational burden.
KW - Frequency estimation
KW - Bandpass filters
KW - Digital filters
U2 - 10.1109/TIE.2018.2860554
DO - 10.1109/TIE.2018.2860554
M3 - Journal article
VL - 66
SP - 4650
EP - 4660
JO - I E E E Transactions on Industrial Electronics
JF - I E E E Transactions on Industrial Electronics
SN - 0278-0046
IS - 6
ER -