A Critical Examination of Frequency-Fixed Second-Order Generalized Integrator-Based Phase-Locked Loops

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Abstract

The implementation of a large number of single-phase phase-locked loops (PLLs) involves creating a fictitious quadrature signal. A popular approach for this purpose is using a second-order generalized integrator-based quadrature signal generator (SOGIQSG) because it results in an acceptable speed/accuracy tradeoff. The SOGI-QSG based PLL (or briefly the SOGI-PLL), in its standard form, involves a frequency feedback loop for adjusting the SOGI resonance frequency under frequency drifts. Some recent research works have reported that the speed/accuracy tradeoff of the SOGI-PLL can be considerably enhanced by removing the frequency feedback loop. In these methods, the SOGI resonance frequency is fixed at the nominal frequency and a compensation strategy for correcting errors caused under off-nominal frequencies are presented. The main aim of this letter is to provide a critical analysis of frequency-fixed SOGI-based PLLs (FFSOGI-PLLs) to highlight their real advantages and disadvantages.
Luk

Detaljer

The implementation of a large number of single-phase phase-locked loops (PLLs) involves creating a fictitious quadrature signal. A popular approach for this purpose is using a second-order generalized integrator-based quadrature signal generator (SOGIQSG) because it results in an acceptable speed/accuracy tradeoff. The SOGI-QSG based PLL (or briefly the SOGI-PLL), in its standard form, involves a frequency feedback loop for adjusting the SOGI resonance frequency under frequency drifts. Some recent research works have reported that the speed/accuracy tradeoff of the SOGI-PLL can be considerably enhanced by removing the frequency feedback loop. In these methods, the SOGI resonance frequency is fixed at the nominal frequency and a compensation strategy for correcting errors caused under off-nominal frequencies are presented. The main aim of this letter is to provide a critical analysis of frequency-fixed SOGI-based PLLs (FFSOGI-PLLs) to highlight their real advantages and disadvantages.
OriginalsprogEngelsk
TidsskriftI E E E Transactions on Power Electronics
Volume/Bind32
Tidsskriftsnummer9
Sider (fra-til)6666 - 6672
Antal sider7
ISSN0885-8993
DOI
StatusUdgivet - sep. 2017
PublikationsartForskning
Peer reviewJa
ID: 255324967