A sensorless control for yaw system of a wind turbine based on variable structure model reference adaptive system

作者：Zhang Dan^*; Hou Li; Wang Rui; Zeng Yingfeng; Shen Yuhong; Xi Qingkun

来源：Energy Education Science and Technology Part A: Energy Science and Research , 2014, 32(6): 7989-7998.

• External environments
• Response characteristic
• Sensor installation
• Sensorless vector control system
• Sliding mode observers
• Speed identification
• Variable structure model
• Yawing system

The speed sensor for yaw system of a wind turbine was vulnerable to external environment, which seriously degraded the yaw system reliability. According to these problems caused by the sensor installation, a sensorless control for a yaw motor was put forward to make wind effectively facing the yaw system. Since sliding mode observer was robust to the motor parameters and disturbances, a variable structure model reference adaptive system (VS-MRAS) observer for speed identification of the yaw motor was proposed. The response characteristics of speed and torque under Matlab/Simulink were compared and analyzed in these two cases which were the sensorless vector control systems based on the VS-MRAS and MRAS respectively. Simulation results show that the former is more suited to dynamic yaw system with high nonlinear and uncertainty, makes dynamic performance of the estimated speed better, and improves control precision of the yaw system.

• 出版日期2014
• 单位四川大学