• Home|About JOPS|Editorial Board|Contact us|Chinese
Latest Papers more>>
ZHANG Bowen,WANG Ping,BEI Taizhou.Single-phase Adaptive FLL Scheme for Reducing the Influence of Power Grid Harmonics[J].JOURNAL OF POWER SUPPLY,2018,16(3):99-105
Single-phase Adaptive FLL Scheme for Reducing the Influence of Power Grid Harmonics
Received:November 01, 2016  Revised:October 24, 2017
View Full Text  View/Add Comment  Download reader
DOI:10.13234/j.issn.2095-2805.2018.3.99
Keywords:photovoltaic  single-phase grid-connected system  second-order generalized integrator-quadrature signal generator (SOGI-QSG)  frequency adaptive controller
Fund Project:Key Research and Development Program of the Ministry of Science and Technology
        
AuthorInstitutionEmail
ZHANG Bowen Key Laboratory of Smart Grid of Ministry of Education, School of Electrical and Information Engineering, Tianjin University, Tianjin , China bwzhang@tju.edu.cn
WANG Ping Key Laboratory of Smart Grid of Ministry of Education, School of Electrical and Information Engineering, Tianjin University, Tianjin , China
BEI Taizhou State Grid Jinan Power Supply Company, Jinan , China
Hits: 339
Download times: 310
Abstract:
      Along with the development of distributed generations, a reliable grid synchronization technology in the single-phase photovoltaic(PV) scenario is an important precondition for inverters to be effectively connected to power grid. In this paper, an effective single-phase adaptive frequency-locked loop(FLL) algorithm is proposed, which consists of a cascaded second-order generalized integrator-quadrature signal generator(SOGI-QSG) and a simple and reliable frequency ad-aptive controller. Theoretical analysis reveals that the cascaded SOGI-QSG has a good filtering performance, so it can improve the voltage signal containing more harmonic distortions; moreover, the proposed frequency adaptive controller can fast track the transient change of grid frequency when the grid suffers from frequency fluctuations. Simulation and experimental results verified the feasibility and effectiveness of the proposed scheme.
Close