摘要
针对安装速度传感器给直驱型永磁风力发电系统带来的可靠性降低、成本增加等缺陷,采用无速度传感器的方法对发电机的转子角度和位置进行估测。结合滑模观测器对电机参数和测量的鲁棒性强以及转子磁链定向的矢量控制能够实现dq轴的解耦控制的优点,建立了基于滑模观测器的直驱型永磁风力发电机的无速度传感器控制系统模型。该系统不仅能够精确地获得转子转速和相位信息,实现高性能的矢量控制,而且能够实现有功、无功功率的独立调节。为了解决传统滑模观测器不连续的砰-砰控制产生的高频抖动,引入了连续的饱和函数。2 MW直驱型永磁风力发电机控制系统仿真验证了该方案的可行性,7.5 KW模拟系统实验结果进一步表明系统具有良好的动静态性能。
Considering the installation of speed sensor could reduce system reliability of the direct-drive PMSG wind turbine system and increase the system cost, a sensorless control system of direct-drive PMSG based on Sliding Mode Observer （SMO） was builted, of which SMO was used to robust to the PMSG parameters and measurement errors and rotor flux oriented vector control technology was a- dopted to control the dq-axis respectively. In the system, rotor speed and phase information can be obtained accurately to achieve high performance motor vector control, and the active and reactive power independent regulation can be realized. Meanwhile, the continuous saturation function was introduced to overcome the high frequency chattering problem which stemed from the discontinuous control of the conventional PMSG Bang-Bang control. The validity of the proposed estimation and control algorithms are shown by simulation studies on a 2MW PMSG wind turbine and the good dynamic and static performance are further demonstrated by experimental results on a 7.5 kW simulation system.
出处
《控制工程》
CSCD
北大核心
2013年第1期132-135,140,共5页
Control Engineering of China
基金
国家自然科学基金(50907020)
教育部高等学校博士学科点专项科研基金(200805321038)
湖南省博士创新基金(CX2010B149)
