DocumentCode :
3305084
Title :
Benchmarking of phase locked loop based synchronization techniques for grid-connected inverter systems
Author :
Yongheng Yang ; Hadjidemetriou, Lenos ; Blaabjerg, Frede ; Kyriakides, Elias
Author_Institution :
Dept. of Energy Technol., Aalborg Univ., Aalborg, Denmark
fYear :
2015
fDate :
1-5 June 2015
Firstpage :
2167
Lastpage :
2174
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.
Keywords :
benchmark testing; invertors; phase locked loops; power generation reliability; power grids; power supply quality; renewable energy sources; synchronisation; PLL synchronization methods; dynamic response; grid disturbances; harmonic immunity; phase locked loop benchmarking; photovoltaic systems; power generation; prior-art solutions; single-phase grid-connected inverter systems; voltage sags; wind turbine systems; Benchmark testing; Delays; Harmonic analysis; Inverters; Phase locked loops; Synchronization; Transforms; Phase locked loop (PLL); T/4 delay PLL; enhanced PLL (EPLL); inverse park transform PLL; multi-harmonic decoupling cell PLL; second order generalized integrator PLL (SOGI-PLL); synchronization;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Electronics and ECCE Asia (ICPE-ECCE Asia), 2015 9th International Conference on
Conference_Location :
Seoul
Type :
conf
DOI :
10.1109/ICPE.2015.7168077
Filename :
7168077
Link To Document :
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