TY - JOUR
T1 - A Nonadaptive Window-Based PLL for Single-Phase Applications
AU - Golestan, Saeed
AU - Guerrero, Josep M.
AU - Quintero, Juan Carlos Vasquez
PY - 2018/1
Y1 - 2018/1
N2 - The rectangular window filter, typically known as the moving average filter (MAF), is a quasi-ideal low-pass filter that has found wide application in designing advanced single-phase phase-locked loops (PLLs). Most often, the MAF is employed as an in-loop filter within the control loop of the single-phase PLL. The in-loop MAF, however, causes a large phase delay and, hence, makes the PLL dynamic response slow. Recently, using MAFs as a prefilter/quadrature signal generator (QSG) before the PLL input has been suggested. As the MAFs are outside the PLL control loop, the problem of slow dynamic response is avoided. Nevertheless, the PLL implementation complexity considerably increases as MAFs are frequency-adaptive and, therefore, they require an additional frequency detector for estimating the grid frequency. To reduce the implementation complexity while maintaining a good performance, using a nonadaptive MAF-based QSG with some error compensators is suggested in this letter. The effectiveness of the resultant PLL, which is briefly called the nonadaptive MAF-based PLL, is verified using experimental results.
AB - The rectangular window filter, typically known as the moving average filter (MAF), is a quasi-ideal low-pass filter that has found wide application in designing advanced single-phase phase-locked loops (PLLs). Most often, the MAF is employed as an in-loop filter within the control loop of the single-phase PLL. The in-loop MAF, however, causes a large phase delay and, hence, makes the PLL dynamic response slow. Recently, using MAFs as a prefilter/quadrature signal generator (QSG) before the PLL input has been suggested. As the MAFs are outside the PLL control loop, the problem of slow dynamic response is avoided. Nevertheless, the PLL implementation complexity considerably increases as MAFs are frequency-adaptive and, therefore, they require an additional frequency detector for estimating the grid frequency. To reduce the implementation complexity while maintaining a good performance, using a nonadaptive MAF-based QSG with some error compensators is suggested in this letter. The effectiveness of the resultant PLL, which is briefly called the nonadaptive MAF-based PLL, is verified using experimental results.
KW - Grid-connected applications
KW - Moving average filter (MAF)
KW - Phase-locked loop (PLL)
KW - Single-phase systems
KW - Synchronization
KW - single-phase systems
KW - synchronization
KW - moving average filter (MAF)
KW - phase-locked loop (PLL)
UR - http://www.scopus.com/inward/record.url?scp=85032218335&partnerID=8YFLogxK
U2 - 10.1109/TPEL.2017.2713379
DO - 10.1109/TPEL.2017.2713379
M3 - Journal article
SN - 0885-8993
VL - 33
SP - 24
EP - 31
JO - I E E E Transactions on Power Electronics
JF - I E E E Transactions on Power Electronics
IS - 1
M1 - 7942085
ER -