Environmental Engineering Reference
In-Depth Information
Chapter 3
Maximum Power Point Tracking Control
of Wind Energy Conversion Systems
Yong Feng and Xinghuo Yu
Abstract This chapter studies the control problems in grid integration of wind
energy conversion systems. Sliding-mode control technique will be used to opti-
mize the control of wind energy conversion systems. The maximum power point
tracking control algorithms for variable-speed wind energy conversion systems are
presented. The grid integration of wind energy conversion systems can be opti-
mized in terms of power delivered to the grid and providing the voltage support
ancillary service at the point of common coupling. The control objective for the
grid integration of wind energy conversion systems is to keep the DC-link voltage
in a desirable value and the input or output power factors staying unitary. The
high-order terminal sliding-mode voltage and current regulators are designed,
respectively, to control the DC-link voltage and the current rapidly and exactly.
The numerical simulations will be carried out to evaluate the control schemes.
Keywords DFIG-based wind power system Voltage-oriented control (VOC)
Grid-side PWM converter Sliding-mode control Terminal sliding mode
Nomenclature
P w
Input power to the wind turbine
r
Wind turbine radius
v w
Wind speed
q
Air density
P m
Mechanical power
C p
Power coefficient
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