Abstract
Maximizing the power capture is an important issue to the turbines that are installed in low wind speed area. In this paper, we focused on the modeling and control of variable speed wind turbine that is composed of two-mass drive train, a Squirrel Cage Induction Generator (SCIG), and voltage source converter control by Space Vector Pulse Width Modulation (SPVWM). To achieve Maximum Power Point Tracking (MPPT), the reference speed to the generator is searched via Extremum Seeking Control (ESC). ESC was designed for wind turbine region II operation based on dither-modulation scheme. ESC is a model-free method that has the ability to increase the captured power in real time under turbulent wind without any requirement for wind measurements. The controller is designed in two loops. In the outer loop, ESC is used to set a desired reference speed to PI controller to regulate the speed of the generator and extract the maximum electrical power. The inner control loop is based on Indirect Field Orientation Control (IFOC) to decouple the currents. Finally, Particle Swarm Optimization (PSO) is used to obtain the optimal PI parameters. Simulation and control of the system have been accomplished using MATLAB/Simulink 2014.
Highlights
Wind energy is a fast-growing interdisciplinary field that encompasses multiple branches of engineering and science
We focused on the modeling and control of variable speed wind turbine that is composed of two-mass drive train, a Squirrel Cage Induction Generator (SCIG), and voltage source converter control by Space Vector Pulse Width Modulation (SPVWM)
The approach in this paper focuses on the control of variable speed Wind Turbine (WT) composed of two-mass drive train, SCIG, and voltage source converter control by SPVWM
Summary
Wind energy is a fast-growing interdisciplinary field that encompasses multiple branches of engineering and science. WTs are classified into two types: fixed and variable speed WT. Fixed speed turbines are using SCIG directly connected to grid without using power electronic converters. Variable-speed turbines are currently the most used turbines that use different types of generators connected to grid through the power converters. Variable-speed turbines allow the rotational speed to be continuously adapted and controlled in such a manner that the turbine operates constantly at its highest level of aerodynamic efficiency the maximum energy can be extracted relying upon the wind speed variations
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