Benchmarking of Phase Locked Loop based Synchronization Techniques for Grid-Connected Inverter Systems

Yongheng Yang, Lenos Hadjidemetriou, Frede Blaabjerg, Elias Kyriakides

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

59 Citations (Scopus)
1976 Downloads (Pure)

Abstract

Grid-connected renewables are increasingly developed in recent years, e.g. wind turbine systems and photovoltaic systems. Synchronization of the injected current with the grid is mandatory. However, grid disturbances like voltage sags, harmonics, and frequency deviations may occur during operation, becoming inevitable challenges to the synchronization of the grid-connected renewable energy systems. In order to ensure the quality of the power generation from the renewables, robust and reliable synchronization methods are in demand. Among the prior-art solutions, Phase Locked Loop (PLL) based synchronization methods have gained much popularity in grid-connected applications. However, an appropriate selection and thus a proper design of the selected PLL synchronization remain of interest in practice, especially for single-phase systems. Therefore, in this paper, a benchmarking of the main PLL synchronization methods for single-phase grid-connected inverter systems in terms of accuracy, dynamic response, harmonic immunity, etc., has been conducted. Experiments on a 1-kW single-phase grid-connected system, suffering from different grid disturbances, are performed for the benchmarking. The experimental results have verified the discussions.
Original languageEnglish
Title of host publicationProceedings of the 2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)
Number of pages8
PublisherIEEE Press
Publication dateJun 2015
Pages2517-2524
Article number7168077
ISBN (Print)978-895708254-6
DOIs
Publication statusPublished - Jun 2015
Event9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia 2015) - Seoul, Korea, Republic of
Duration: 1 Jun 20155 Jun 2015

Conference

Conference9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia 2015)
Country/TerritoryKorea, Republic of
CitySeoul
Period01/06/201505/06/2015

Keywords

  • Phase locked loop (PLL)
  • Synchronization
  • T/4 delay PLL
  • Inverse park transform PLL
  • Enhanced PLL
  • Second order generalized integrator PLL
  • Multi-harmonic decoupling cell PLL

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