TY - GEN
T1 - Benchmarking of Different Orthogonal Signal Generator Configurations for SOGI PLL Applications
AU - Bamigbade, Abdullahi
AU - Khadkikar, Vinod
N1 - Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - Phase locked-loop (PLL) implementation using a second-order generalized integrator orthogonal signal generator (SOGI OSG) is very popular for grid applications involving synchronization and parameter estimation. Depending on the transfer function of the OSG outputs, different configurations of SOGI OSG, namely: standard SOGI (S-SOGI), highpass SOGI (H-SOGI) and lowpass SOGI (L-SOGI) are possible. In this work, these different SOGI OSGs are benchmarked to determine their advantages and disadvantages for PLL implementation. Specifically, the momentary loss of orthogonality at the OSG output during grid disturbances that cause the PLL's estimated frequency to deviate from its nominal value is evaluated. It is shown that, although the different SOGI-based PLLs share structural similarities, they are indeed distinct in their response to grid disturbances. Experimental results are provided to verify the accuracy of the SOGI OSG benchmark where it is revealed that the S-SOGI PLL, which is the most popular of the SOGI PLLs, may not be suitable for grid applications requiring low-voltage ride-through capability.
AB - Phase locked-loop (PLL) implementation using a second-order generalized integrator orthogonal signal generator (SOGI OSG) is very popular for grid applications involving synchronization and parameter estimation. Depending on the transfer function of the OSG outputs, different configurations of SOGI OSG, namely: standard SOGI (S-SOGI), highpass SOGI (H-SOGI) and lowpass SOGI (L-SOGI) are possible. In this work, these different SOGI OSGs are benchmarked to determine their advantages and disadvantages for PLL implementation. Specifically, the momentary loss of orthogonality at the OSG output during grid disturbances that cause the PLL's estimated frequency to deviate from its nominal value is evaluated. It is shown that, although the different SOGI-based PLLs share structural similarities, they are indeed distinct in their response to grid disturbances. Experimental results are provided to verify the accuracy of the SOGI OSG benchmark where it is revealed that the S-SOGI PLL, which is the most popular of the SOGI PLLs, may not be suitable for grid applications requiring low-voltage ride-through capability.
KW - Orthogonal signal generator
KW - Phase locked-loop
KW - Second-order generalized integrator
KW - Transfer function
UR - http://www.scopus.com/inward/record.url?scp=85124700466&partnerID=8YFLogxK
U2 - 10.1109/IAS48185.2021.9677391
DO - 10.1109/IAS48185.2021.9677391
M3 - Conference contribution
AN - SCOPUS:85124700466
T3 - Conference Record - IAS Annual Meeting (IEEE Industry Applications Society)
BT - 2021 IEEE Industry Applications Society Annual Meeting, IAS 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 IEEE Industry Applications Society Annual Meeting, IAS 2021
Y2 - 10 October 2021 through 14 October 2021
ER -