变桨伺服无速度传感器控制

Speed Sensorless Control of Pitch Servo Drive System

变桨系统的可靠性对于风电机组安全运行具有重要意义,而变桨驱动永磁同步电机的无速度传感器控制技术又是提高变桨系统风电机组可靠性的有效方案之一。本文提出了一种全速度范围的无速度传感器控制策略。在转速低时采用脉振高频电压注入法,转速高时使用模型参考自适应法,转速在过渡区时采用变权重复合算法。基于MATLAB/Simulink仿真平台,搭建了永磁同步电机矢量控制无速度传感器仿真系统,基于Myway控制平台搭建了实验电路。仿真和实验结果验证了提出的全速度范围无速度传感器控制策略的可行性。

The reliability of pitch system has important significance on the safety operation of wind turbine generator, and the speed sensorless control technology of pitch-driven PMSM is one of the effective schemes for improving the reliability of wind turbine generator in pitch system. In this paper, a sensorless control strategy for wide-speedrange operation is proposed. The pulsating high-frequency voltage signal injection method is adopted when the rotor speed is low, and the model reference adaptive system(MRAS) is adopted when the rotor speed is high. When the rotor speed is in the transition zone, a weighted algorithm is adopted. A simulation model of PMSM sensorless control system based on MATLAB/Simulink platform is built, and the PMSM experimental circuit is set up based on a Myway control platform. The effectiveness of the proposed wide-speed-range control strategy is validated by the simulation and experimental results.