Advanced SOGI-FLL Scheme Based on Fuzzy Logic for Single-Phase Grid-Connected Converters

Jin-Sang Park; Thanh Hai Nguyen; Dong-Choon Lee

Advanced SOGI-FLL Scheme Based on Fuzzy Logic for Single-Phase Grid-Connected Converters

Jin-Sang Park

Thanh Hai Nguyen

Dong-Choon Lee

Vol. 14, No. 3, pp. 598-607, May 2014

10.6113/JPE.2014.14.3.598

Current control

Frequency-locked loop

fuzzy logic

Second-order generalized integrator SOGI)

Single-phase converter

PDF

Abstract

This paper proposes a frequency-locked loop (FLL) scheme for a single-phase grid-connected converter. A second-order generalized integrator (SOGI) based on fuzzy logic (FL) is applied to this converter to achieve precise phase angle detection. The use of this method enables the compensation of the nonlinear characteristic of the frequency error, which is defined in the SOGI scheme as the variation of the central frequency through the self-tuning gain. With the proposed scheme, the performance of the SOGI-FLL is further improved at the grid disturbances, which results in the stable operation of the grid converter under grid voltage sags or frequency variation. The PSIM simulation and experimental results are shown to verify the effectiveness of the proposed method.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

J. Park, T. H. Nguyen, D. Lee, "Advanced SOGI-FLL Scheme Based on Fuzzy Logic for Single-Phase Grid-Connected Converters," Journal of Power Electronics, vol. 14, no. 3, pp. 598-607, 2014. DOI: 10.6113/JPE.2014.14.3.598.

[ACM Style]

Jin-Sang Park, Thanh Hai Nguyen, and Dong-Choon Lee. 2014. Advanced SOGI-FLL Scheme Based on Fuzzy Logic for Single-Phase Grid-Connected Converters. Journal of Power Electronics, 14, 3, (2014), 598-607. DOI: 10.6113/JPE.2014.14.3.598.