Investigation of fault ride-through behavior of DFIG-based wind energy conversion systems

Asymmetrical voltage conditions in the grid can have significant negative effects on the performance of wind energy conversion systems (WECS) equipped with doubly-fed induction generators (DFIG). Transient peaks as well as steady-state second-order and higher frequency harmonics are introduced in the active and reactive output powers, in the DC-link voltage and in the toque produced by the WECS. These effects can decrease the lifetime of the system and in extreme cases they can lead to violation of the grid code requirements as the system will not be able to ride-through the fault. Protective measures must be taken so that the WECS remains connected to the grid and fulfills the low voltage ride-through requirements, without putting the reliability of the system at risk. In this paper the dynamic behavior of the DFIG-based WECS in the case asymmetrical voltage dips is analyzed. A control strategy is presented, which minimizes the negative effects of voltage dips on the WECS and enables it to `ride-through' the fault safely. With this strategy the wind energy conversion system can support the voltage recovery during and after the fault and it can fulfill the demanding grid code requirements.

[1]  F. Blaabjerg,et al.  Rotor Voltage Dynamics in the Doubly Fed Induction Generator During Grid Faults , 2010, IEEE Transactions on Power Electronics.

[2]  Zhe Chen,et al.  Analysis of a Commercial Wind Farm in Taiwan Part I: Measurement Results and Simulations , 2011, IEEE Transactions on Industry Applications.

[3]  Constantinos Sourkounis,et al.  Energy Yield and Power Fluctuation of Different Control Methods for Wind Energy Converters , 2011 .

[4]  F. Poitiers,et al.  Advanced control of a doubly-fed induction generator for wind energy conversion , 2009 .

[5]  M.F. Conlon,et al.  Performance of a Variable Speed Double-Fed Induction Generator Wind Turbine During Network Voltage Unbalance Conditions , 2006, Proceedings of the 41st International Universities Power Engineering Conference.

[6]  Constantinos Sourkounis,et al.  Influence of Wind-Energy-Converter Control Methods on the Output Frequency Components , 2009 .

[7]  Eduard Muljadi,et al.  Different Factors Affecting Short Circuit Behavior of a Wind Power Plant , 2013 .

[8]  Constantinos Sourkounis,et al.  Grid Code Requirements for Wind Power Integration in Europe , 2013 .

[9]  Nicholas Jenkins,et al.  Integration of wind turbines on weak rural networks , 1996 .

[10]  J. López,et al.  Wind Turbines Based on Doubly Fed Induction Generator Under Asymmetrical Voltage Dips , 2008, IEEE Transactions on Energy Conversion.

[11]  R. Datta,et al.  Decoupled control of active and reactive power for a grid-connected doubly-fed wound rotor induction machine without position sensors , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[12]  Marco Liserre,et al.  Overview of Multi-MW Wind Turbines and Wind Parks , 2011, IEEE Transactions on Industrial Electronics.