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LTP Modeling and Harmonic Analysis of Discrete Universal SOGI-FLL
2022 IEEE Energy Conversion Congress and Exposition (ECCE), 2022Haoyang Zheng, Zeng Liu, Kaiwen Feng
exaly +2 more sources
Electronics (Switzerland), 2021 The SOGI-FLL (second-order generalized-integrator frequency-locked-loop) is a well-known and simple adaptive filter that allows estimation of the parameters of the grid voltage with a small computational burden.
Sajad Abdali Nejad +2 more
exaly +2 more sources
Sustainability, 2019 The increasing use of multi-parallel grid-connected inverters introduces both high-quality and high-capacity power, while it tends to cause a resonance instability problem.
Wu Cao, Kangli Liu, Haotian Kang
exaly +2 more sources
SOGI-FLL for synchronization and fault detection in an inverter connected to the grid
2015 IEEE PES Innovative Smart Grid Technologies Latin America (ISGT LATAM), 2015This paper presents a theoretical analysis and simulation for the design and implementation of a Second Order Generalized Integrator - Frequency Locked Loop (SOGI-FLL) aimed at synchronization and fault detection when connecting an inverter to the utility grid. Such an inverter is implemented in a Highly-Efficient-and-Reliable- Inverter-Concept (HERIC)
David Gamez Patiño +3 more
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Implementation a HERIC inverter prototype connected to the grid controlled by SOGI-FLL
2015 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA), 2015This paper presents a feasible implementation of a single phase inverter prototype via a Highly Efficient and Reliable Inverter Concept (HERIC) topology, which is connected to the grid through a phase and frequency synchronization system by means of a Second Order Generalized Integrator — Frequency Locked Loop (SOGI-FLL).
David Gamez Patino +3 more
openaire +1 more source
PV integrated grid synchronization technique using modified SOGI-FLL and zero-crossing detector
Electrical Engineering, 2021The operation of a grid-connected photovoltaic (PV) system with improvement in power quality depends mostly on the estimation of synchronizing signals. A hybrid algorithm for the estimation of the synchronizing unit templates has been proposed in this paper.
Hemant Saxena +3 more
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Sensorless Speed Control of Diesel-Generator Systems Based on Multiple SOGI-FLLs
2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia), 2018This paper proposes a novel method of speed estimation for variable-speed diesel-generator (genset) systems, where the speed of the genset is calculated from the back-EMF frequency of the generator. The back-EMF frequency is extracted from an output phase current. The proposed method is based on multiple and cascade second-order generalized integrators
Ngoc Dat Dao +2 more
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Harmonic Impedance Analysis of LCL Type Grid-connected Inverter Based on SOGI-FLL
Proceedings of the 2019 The 2nd International Conference on Robotics, Control and Automation Engineering, 2019Background harmonics in weak grid have a great influence on the output current of grid-connected inverters. Existing studies had not considered the influence of synchronization loop, nor analyzed the harmonic propagation law in detail. For this reason, the small signal model of synchronization loop of SOGI-FLL and reference current loop are deduced ...
Wang Kai, Zhao Huijuan, Huang Jingtao
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Advanced single-phase SOGI-FLL using self-tuning gain based on fuzzy logic
2013 IEEE ECCE Asia Downunder, 2013In this paper, a frequency-locked loop (FLL) algorithm using the self-tuning gain is proposed for a precise phase angle detection from a second-order generalized integrator (SOGI) in a single-phase AC system. The integrator gain in the FLL is tuned by the fuzzy logic controller in which the frequency error and its variation are adopted as control input
Jin-Sang Park +2 more
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