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

被引：841

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

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2011年 / 58卷 / 01期

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

页码：127 / 138

页数：12

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