Adaptive sliding mode back-stepping pitch angle control of a variable-displacement pump controlled pitch system for wind turbines

作者：Yin, Xiu-xing; Lin, Yong-gang^*; Li, Wei; Liu, Hong-wei; Gu, Ya-jing

来源：ISA Transactions, 2015, 58: 629-634.

DOI：10.1016/j.isatra.2015.07.006

• Pitch system
• Variable-displacement pump
• Sliding mode controller
• Back-stepping controller
• Wind turbine control
• Flap-wise load

A variable-displacement pump controlled pitch system is proposed to mitigate generator power and flap-wise load fluctuations for wind turbines. The pitch system mainly consists of a variable-displacement hydraulic pump, a fixed-displacement hydraulic motor and a gear set. The hydraulic motor can be accurately regulated by controlling the pump displacement and fluid flows to change the pitch angle through the gear set. The detailed mathematical representation and dynamic characteristics of the proposed pitch system are thoroughly analyzed. An adaptive sliding mode pump displacement controller and a back-stepping stroke piston controller are designed for the proposed pitch system such that the resulting pitch angle tracks its desired value regardless of external disturbances and uncertainties. The effectiveness and control efficiency of the proposed pitch system and controllers have been verified by using realistic dataset of a 750 kW research wind turbine.

• 出版日期2015-9
• 单位浙江大学