Adaptive Vectorial Filter for Grid Synchronization of Power Converters Under Unbalanced and/or Distorted Grid Conditions

This paper presents a new synchronization scheme for detecting multiple positive-/negative-sequence frequency harmonics in three-phase systems for grid-connected power converters. The proposed technique is called MAVF-FLL because it is based on the use of multiple adaptive vectorial filters (AVFs) working together inside a harmonic decoupling network, resting on a frequency-locked loop (FLL) which makes the system frequency adaptive. The method uses the vectorial properties of the three-phase input signal in the αβ reference frame in order to obtain the different harmonic components. The MAVF-FLL is fully designed and analyzed, addressing the tuning procedure in order to obtain the desired and predefined performance. The proposed algorithm is evaluated by both simulation and experimental results, demonstrating its ability to perform as required for detecting different harmonic components under a highly unbalanced and distorted input grid voltage.

[1]  Se-Kyo Chung,et al.  A phase tracking system for three phase utility interface inverters , 2000 .

[2]  Guan-Chyun Hsieh,et al.  Phase-locked loop techniques. A survey , 1996, IEEE Trans. Ind. Electron..

[3]  Zhanfeng Song,et al.  Robust Model Predictive Current Control of Three-Phase Voltage Source PWM Rectifier With Online Disturbance Observation , 2012, IEEE Transactions on Industrial Informatics.

[4]  R. Teodorescu,et al.  A Stationary Reference Frame Grid Synchronization System for Three-Phase Grid-Connected Power Converters Under Adverse Grid Conditions , 2012, IEEE Transactions on Power Electronics.

[5]  Leopoldo García Franquelo,et al.  Model Based Adaptive Direct Power Control for Three-Level NPC Converters , 2013, IEEE Transactions on Industrial Informatics.

[6]  D. Boroyevich,et al.  Decoupled Double Synchronous Reference Frame PLL for Power Converters Control , 2007, IEEE Transactions on Power Electronics.

[7]  Xiao Qiang Guo.  Frequency-adaptive voltage sequence estimation for grid synchronisation , 2010 .

[8]  Davood Yazdani,et al.  A Real-Time Extraction of Harmonic and Reactive Current in a Nonlinear Load for Grid-Connected Converters , 2009, IEEE Transactions on Industrial Electronics.

[9]  P. Rodriguez,et al.  Enhanced Decoupled Double Synchronous Reference Frame Current Controller for Unbalanced Grid-Voltage Conditions , 2012, IEEE Transactions on Power Electronics.

[10]  Srdjan M. Lukic,et al.  Energy Storage Systems for Transport and Grid Applications , 2010, IEEE Transactions on Industrial Electronics.

[11]  V. Blasko,et al.  Operation of a phase locked loop system under distorted utility conditions , 1997 .

[12]  Frede Blaabjerg,et al.  Flexible Active Power Control of Distributed Power Generation Systems During Grid Faults , 2007, IEEE Transactions on Industrial Electronics.

[13]  G. Joos,et al.  A Fast and Accurate Synchronization Technique for Extraction of Symmetrical Components , 2009, IEEE Transactions on Power Electronics.

[14]  M. Karimi-Ghartemani,et al.  A Filtering Technique for Three-Phase Power Systems , 2005, 2005 IEEE Instrumentationand Measurement Technology Conference Proceedings.

[15]  Jon Are Suul,et al.  Voltage-Sensor-Less Synchronization to Unbalanced Grids by Frequency-Adaptive Virtual Flux Estimation , 2012, IEEE Transactions on Industrial Electronics.

[16]  Leopoldo García Franquelo,et al.  A novel control method for active filters, based on filtered current , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[17]  Alireza R. Bakhshai,et al.  Time-Domain Signal Analysis Using Adaptive Notch Filter , 2007, IEEE Transactions on Signal Processing.

[18]  Fei Wang,et al.  High Performance Stationary Frame Filters for Symmetrical Sequences or Harmonics Separation Under a Variety of Grid Conditions , 2009, 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

[19]  Marian P. Kazmierkowski,et al.  Control of Three-Level PWM Converter Applied to Variable-Speed-Type Turbines , 2009, IEEE Transactions on Industrial Electronics.

[20]  Alexandre Oudalov,et al.  The Provision of Frequency Control Reserves From Multiple Microgrids , 2011, IEEE Transactions on Industrial Electronics.

[21]  F. Blaabjerg,et al.  Advanced Grid Synchronization System for Power Converters under Unbalanced and Distorted Operating Conditions , 2006, IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics.

[22]  Frede Blaabjerg,et al.  Overview of Control and Grid Synchronization for Distributed Power Generation Systems , 2006, IEEE Transactions on Industrial Electronics.

[23]  F. Blaabjerg,et al.  Power electronics as efficient interface in dispersed power generation systems , 2004, IEEE Transactions on Power Electronics.

[24]  Jan T. Bialasiewicz,et al.  Power-Electronic Systems for the Grid Integration of Renewable Energy Sources: A Survey , 2006, IEEE Transactions on Industrial Electronics.

[25]  Sergio Vazquez,et al.  A Model-Based Direct Power Control for Three-Phase Power Converters , 2008, IEEE Transactions on Industrial Electronics.

[26]  Zhe Chen,et al.  Multiple-Complex Coefficient-Filter-Based Phase-Locked Loop and Synchronization Technique for Three-Phase Grid-Interfaced Converters in Distributed Utility Networks , 2011, IEEE Transactions on Industrial Electronics.

[27]  Shinji Shinnaka,et al.  A Robust Single-Phase PLL System With Stable and Fast Tracking , 2008, IEEE Transactions on Industry Applications.

[28]  Frede Blaabjerg,et al.  Multiresonant Frequency-Locked Loop for Grid Synchronization of Power Converters Under Distorted Grid Conditions , 2011, IEEE Transactions on Industrial Electronics.

[29]  Mario Rizo,et al.  A Generalized Delayed Signal Cancellation Method for Detecting Fundamental-Frequency Positive-Sequence Three-Phase Signals , 2010, IEEE Transactions on Power Delivery.