Multiresonant Frequency-Locked Loop for Grid Synchronization of Power Converters Under Distorted Grid Conditions

被引:894
作者
Rodriguez, Pedro [1 ]
Luna, Alvaro [1 ]
Candela, Ignacio [1 ]
Mujal, Ramon [1 ]
Teodorescu, Remus [2 ,3 ]
Blaabjerg, Frede [2 ]
机构
[1] Tech Univ Catalonia, Dept Elect Engn, Barcelona 08222, Spain
[2] Aalborg Univ, Dept Energy Technol, DK-9220 Aalborg, Denmark
[3] Univ Galatzi, Dept Elect Engn, Galati 800008, Romania
关键词
Frequency estimation; frequency-locked loops (FLLs); harmonic analysis; monitoring; synchronization; SYMMETRICAL COMPONENTS; SYSTEMS; HARMONICS; INTERFACE; FILTERS;
D O I
10.1109/TIE.2010.2042420
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
This paper presents a new multiresonant frequency-adaptive synchronization method for grid-connected power converters that allows estimating not only the positive-and negative-sequence components of the power signal at the fundamental frequency but also other sequence components at other harmonic frequencies. The proposed system is called MSOGI-FLL since it is based on both a harmonic decoupling network consisting of multiple second-order generalized integrators (MSOGIs) and a frequency-locked loop (FLL), which makes the system frequency adaptive. In this paper, the MSOGI-FLL is analyzed for single-and three-phase applications, deducing some key expressions regarding its stability and tuning. Moreover, the performance of the MSOGI-FLL is evaluated by both simulations and experiments to show its capability for detecting different harmonic components in a highly polluted grid scenario.
引用
收藏
页码:127 / 138
页数:12
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