WU Zhen-jun, YANG Kai and QIN Fang-yuan. Detection method of fundamental positive sequence components based on double second-order generalized integrator frequency-locked loop[J]. Journal of Light Industry, 2017, 32(2): 91-96. doi: 10.3969/j.issn.2096-1553.2017.2.014
Citation:WU Zhen-jun, YANG Kai and QIN Fang-yuan. Detection method of fundamental positive sequence components based on double second-order generalized integrator frequency-locked loop[J]. Journal of Light Industry, 2017, 32(2): 91-96.doi:10.3969/j.issn.2096-1553.2017.2.014
Detection method of fundamental positive sequence components based on double second-order generalized integrator frequency-locked loop
College of Electric and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China;
Anyang Power Supply Company, State Grid He'nan Electric Power Company, Anyang 455000, China
- Received Date:2015-11-19
Accepted Date:2016-09-26
Abstract
In view of the problem of three-phase voltage unbalance, the double second-order generalized integrator frequency-locked loop (DSOGI-FLL) was designed.It used DSOGI-FLL angular frequency feedback instead of the second order generalized integrator phase-locked loop (DSOGI-PLL) frequency feedback, and realized the adaptive control of the input voltage frequency. Four conditions including asymmetric voltage drop, harmonic pollution, phase mutations, frequency mutations were simulated in Matlab/Simulink platform, and its performance was compared with DSOGI-PLL.The results showed that DSOGI-FLL had the better characteristics in tracking phase and frequency in all kinds of cases; especially so when the phase variation and frequency variation happened.
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