Modeling and Control Strategies of Fuzzy Logic Controlled Inverter System for Grid Interconnected Variable Speed Wind Generator

Today, variable speed operation of a permanent magnet synchronous generator (PMSG) is becoming popular in the wind power industry (PI). A variable speed wind turbine (VSWT)-driven PMSG, in general, is connected to the grid using a fully controlled frequency converter (FC). Along with the generator side converter, the FC necessitates the grid side inverter system that has a great impact on the stability issue of the VSWT-PMSG, especially in the case of network disturbance. The well-known cascaded-controlled inverter system has widely been reported in much of the literature, where multiple PI controllers are used in inner and outer loops. However, a fuzzy logic controller deals well with the nonlinearity of the power system, compared to a PI controller. This paper presents a simple fuzzy logic controlled inverter system for the control of a grid side inverter system, which suits well for VSWT-PMSG operation in a wide operating range. This is one of the salient features of this paper. Detailed modeling and control strategies of the overall system are demonstrated. Both dynamic and transient performances of VSWT-driven PMSG are analyzed to show the effectiveness of the control strategy, where simulation has been done using PSCAD/EMTDC.

[1]  Daisuke Itoh,et al.  A Nover PLL and Frequency Detecting Method Suited for the Abnormal Voltages under Fault Conditions in the Power System , 1998 .

[2]  Zhe Chen,et al.  Nonlinear control for variable-speed wind turbines with permanent magnet generators , 2007, 2007 International Conference on Electrical Machines and Systems (ICEMS).

[3]  E. Muljadi,et al.  Effect of Variable Speed Wind Turbine Generator on Stability of a Weak Grid , 2007, IEEE Transactions on Energy Conversion.

[4]  P. Ledesma,et al.  Doubly fed induction generator model for transient stability analysis , 2005, IEEE Transactions on Energy Conversion.

[5]  K. Tan,et al.  Optimum control strategies in energy conversion of PMSG wind turbine system without mechanical sensors , 2004, IEEE Transactions on Energy Conversion.

[6]  Dr. Hans Hellendoorn,et al.  An Introduction to Fuzzy Control , 1996, Springer Berlin Heidelberg.

[7]  P. Schegner,et al.  Comparison of stabilizing methods for doubly-fed induction generators for wind turbines , 2005, 2005 International Conference on Future Power Systems.

[8]  Peter Vas,et al.  Electrical Machines and Drives: A Space-Vector Theory Approach , 1993 .

[9]  Timothy J. E. Miller,et al.  Brushless Permanent-Magnet and Reluctance Motor Drives , 1989 .

[10]  Frede Blaabjerg,et al.  Transient stability of DFIG wind turbines at an external short‐circuit fault , 2005 .

[11]  Poul Ejnar Sørensen,et al.  Robust multi‐model control of an autonomous wind power system , 2006 .

[12]  Bharat Singh,et al.  Wind Power Interconnection into the Power System: A Review of Grid Code Requirements , 2009 .

[13]  S.M. Muyeen,et al.  Transient stability enhancement of variable speed wind turbine driven PMSG with rectifier-boost converter-inverter , 2008, 2008 18th International Conference on Electrical Machines.

[14]  M. Chinchilla,et al.  Control of permanent-magnet generators applied to variable-speed wind-energy systems connected to the grid , 2006, IEEE Transactions on Energy Conversion.

[15]  S.M. Muyeen,et al.  Transient stability analysis of permanent magnet variable speed synchronous wind generator , 2007, 2007 International Conference on Electrical Machines and Systems (ICEMS).

[16]  Shigeo Morimoto,et al.  Power Maximization Control of Variable Speed Wind Generation System Using Permanent Magnet Synchronous Generator , 2003 .

[17]  N.A. Janssens,et al.  Active Power Control Strategies of DFIG Wind Turbines , 2007, 2007 IEEE Lausanne Power Tech.

[18]  H. Polinder,et al.  General Model for Representing Variable-Speed Wind Turbines in Power System Dynamics Simulations , 2002, IEEE Power Engineering Review.