Research on Variable Pitch Control System for Wind Turbine Blades
Date Issued
2009
Date
2009
Author(s)
Lin, Che-Ming
Abstract
This paper aims to develop a novel variable pitch control system of a large wind turbine which contains a novel mechanism design of the variable pitch control system, a variable rotational speed pump-controlled hydraulic driving system and a PC-based control system with a pitch controller designed by the adaptive fuzzy controller with self-tuning fuzzy sliding-mode compensation (AFC-STFSMC). The blade pitch control of the wind turbine is implemented under different disturbance conditions for maintaining the constant rated power output of the generator as the wind speed is larger than the rated wind speed. The variable rotational speed pump-controlled hydraulic driving system has the advantages of high response, high energy efficiency, small dimension and high robustness such that it is very suitable for driving the blade pitch control of an off-shore wind turbine. Besides, hardware-in-the-loop which combines the dynamic simulation of the main subsystems, including the aero-dynamics of blades, gear box and permanent magnet synchronous generator, and the experiment system of the novel variable pitch control system, is implemented for realize the practical pitch control and analyze the dynamic characteristics of the overall wind turbine system under variable wind speed.
Subjects
wind turbine
variable rotational speed hydraulic pump-controlled servo systems
pitch control
adaptive fuzzy controller with self-tuning fuzzy sliding-mode compensation
hardware-in-the-loop
SDGs
Type
thesis
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