Damping of Blade-shaft Torsional Oscillations of Wind Turbine Generator System

Abstract In this article, the blade and shaft torsional oscillations of wind turbine generator system (WTGS) when a network disturbance occurs in the power system are analyzed. Several reports are available in the literature, where the damping of shaft torsional oscillations of steam turbine generator system is discussed. Though a huge number of wind generators are going to be connected with the existing network, the damping of blade-shaft torsional oscillations of WTGS has so far not been reported. In this work, for the damping of blade-shaft torsional oscillations of WTGS, the voltage source converter (VSC) based three-level STATCOM is proposed. The six-mass drive train model of WTGS is used for the sake of precise analysis. Moreover, the damping of blade-shaft torsional oscillations of WTGS by using pitch controller is analyzed also, since a pitch controller is attached with most of the recent wind turbines. Both symmetrical and unsymmetrical faults are considered as the network disturbances. Simulation results clearly show that the pitch controller can somewhat, and the STATCOM can significantly, decrease the blade and shaft torsional oscillations of WTGS, where the simulations have been done by PSCAD/EMTDC.

[1]  S. Salman,et al.  Windmill Modeling Consideration and Factors Influencing the Stability of a Grid-Connected Wind Power Based Embedded Generator , 2002, IEEE Power Engineering Review.

[2]  Charles Concordia,et al.  Concepts of Synchronous Machine Stability as Affected by Excitation Control , 1969 .

[3]  Torbjorn Thiringer,et al.  Modeling of Wind Turbines for Power System Studies , 2002, IEEE Power Engineering Review.

[4]  E. S. Abdin,et al.  Control design and dynamic performance analysis of a wind turbine-induction generator unit , 1998, POWERCON '98. 1998 International Conference on Power System Technology. Proceedings (Cat. No.98EX151).

[5]  J. Cidras,et al.  Power fluctuations in an isolated wind plant , 2004, IEEE Transactions on Energy Conversion.

[6]  S. K. Salman,et al.  Investigation into the estimation of the critical clearing time of a grid connected wind power based embedded generator , 2002, IEEE/PES Transmission and Distribution Conference and Exhibition.

[7]  Arne Hejde Nielsen,et al.  Advanced simulation of windmills in the electric power supply , 2000 .

[8]  W. Leithead,et al.  Control of variable speed wind turbines: Dynamic models , 2000 .

[9]  S. K. Salman,et al.  Windmill modelling consideration and factors influencing the stability of a grid-connected wind power based embedded generator , 2003, 2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491).

[10]  O. Wasynczuk.  Damping Shaft Torsional Oscillations Using a Dynamically Controlled Resistor Bank , 1981, IEEE Transactions on Power Apparatus and Systems.

[11]  S. A. Papathanassiou,et al.  Mechanical Stresses in Fixed-Speed Wind Turbines Due to Network Disturbances , 2001, IEEE Power Engineering Review.

[12]  S.M. Muyeen,et al.  Transient Stability Analysis of Wind Generator System with the Consideration of Multi-Mass Shaft Model , 2005, 2005 International Conference on Power Electronics and Drives Systems.

[13]  Niels Kjølstad Poulsen,et al.  Modelling and transient stability of large wind farms , 2003 .

[14]  Mohammad Abdul Mannan,et al.  Fault Analysis of Wind Turbine Generator System Considering Six-Mass Drive Train Model , 2006, 2006 International Conference on Electrical and Computer Engineering.

[15]  F. Blaabjerg,et al.  Wind turbine Generator modeling and Simulation where rotational speed is the controlled variable , 2004, IEEE Transactions on Industry Applications.

[16]  D. Lambrecht,et al.  Effect of clearing short circuits and automatic reclosing on torsional stress and life expenditure of turbine-generator shafts , 1976, IEEE Transactions on Power Apparatus and Systems.

[17]  C. Izquierdo Mitchell,et al.  PSCAD based simulation of the connection of a wind generator to the network , 2001 .

[18]  Torbjörn Thiringer,et al.  Power quality measurements performed on a low-voltage grid equipped with two wind turbines , 1996 .

[19]  Anjan Bose,et al.  Stability Simulation Of Wind Turbine Systems , 1983, IEEE Transactions on Power Apparatus and Systems.

[20]  E. N. Hinrichsen,et al.  Dynamics and Stability of Wind Turbine Generators , 1982, IEEE Transactions on Power Apparatus and Systems.

[21]  Toshiaki Murata,et al.  Transient Stability Enhancement of Wind Generator by a New Logical Pitch Controller (特集:環境問題と電力・エネルギーシステム) , 2006 .

[22]  S. K. Salman,et al.  Improvement of fault clearing time of wind farm using reactive power compensation , 2001, 2001 IEEE Porto Power Tech Proceedings (Cat. No.01EX502).

[23]  Siegfried Heier,et al.  Grid Integration of Wind Energy Conversion Systems , 1998 .

[24]  A. P,et al.  Mechanical Vibrations , 1948, Nature.

[25]  D.J. Trudnowski,et al.  Fixed-speed wind-generator and wind-park modeling for transient stability studies , 2004, IEEE Transactions on Power Systems.

[26]  Toshiaki Murata,et al.  Transient Stability Analysis of Grid Connected Wind Turbine Generator System Considering Multi-Mass Shaft Modeling , 2006 .

[27]  Junji Tamura,et al.  Transient stability simulation of power system including wind generator by PSCAD/EMTDC , 2001, 2001 IEEE Porto Power Tech Proceedings (Cat. No.01EX502).

[28]  Toshiaki Murata,et al.  Transient stability simulation of wind generator expressed by two-mass model , 2008 .