Journal of System Simulation
Abstract
Abstract: The low-voltage ride-through in photovoltaic power generation is a key problem for photovoltaic inverters connected to grid. Aiming at the frequency- and phase-locking of low-voltage ride-through on the photovoltaic inverter during asymmetric fault on the grid and using positive and negative sequence separation, a dual second-order generalized integral frequency- and phase-locking algorithm (DSOGI-FLL-PLL) is proposed, and a simple FLL is used so that positive and negative sequence separation can be performed for various frequencies. The conventional phase-lock- loop (PLL) is also used to capture the grid-side voltage, which greatly reduces response time and error of PLL during asymmetric faults on the grid. Simulation results show that this method, when applied to track low-voltage ride-through on photovoltaic inverter connected to grid, can save about two third of the frequency-lock and phase-lock response time.
Recommended Citation
Li, Bobo; Li, Shouzhi; and Zhang, Yanxiao
(2018)
"New Phase-lock Method for Tracking Low-voltage Ride-through on Photovoltaic Inverters,"
Journal of System Simulation: Vol. 30:
Iss.
6, Article 41.
DOI: 10.16182/j.issn1004731x.joss.201806041
Available at:
https://dc-china-simulation.researchcommons.org/journal/vol30/iss6/41
First Page
2328
Revised Date
2016-11-16
DOI Link
https://doi.org/10.16182/j.issn1004731x.joss.201806041
Last Page
2334
CLC
TP29
Recommended Citation
Li Bobo, Li Shouzhi, Zhang Yanxiao. New Phase-lock Method for Tracking Low-voltage Ride-through on Photovoltaic Inverters[J]. Journal of System Simulation, 2018, 30(6): 2328-2334.
DOI
10.16182/j.issn1004731x.joss.201806041
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