摘要
分析了用于海上永磁直驱同步发电机的风力机模型及其运行特性,采用基于全阶自适应定子磁链观测器和定子电阻在线辨识的改进直接转矩控制技术,实现异步电机模拟风力机输出特性。仿真结果表明,改进直接转矩控制改善了传统直接转矩控制在低速范围内具有较大电流和转矩脉动的缺点,更加适用于低转速的海上永磁直驱同步发电机。
This paper analyzed wind turbine model used in offshore direct-drive permanent magnet synchronous generator and its operation characteristics. Based on improved direct torque control technology with adaptive full-order stator flux observer and on-line identification of stator resistance, induction motor was used to simulate the output characteristic of wind turbine. Simulation results show that the improved direct torque control decreases the current and torque ripple of induction motor at low speed range in traditional direct torque control, which is more suitable for offshore direct-drive permanent magnet synchronous generator running in low-speed.
出处
《电力建设》
2014年第4期1-5,共5页
Electric Power Construction
基金
国家高技术研究发展计划项目(863计划)(2013AA050601)
关键词
海上风力机
海上风力机模拟系统
改进直接转矩控制
全阶自适应定子磁链观测器
定子电阻在线辨识
offshore wind turbine
simulation system of offshore wind turbine
improved direct torque control
adaptivefull-order stator flux observer
on-line identification of stator resistance
