摘要
在直驱式永磁风电系统中速度传感器安装困难,无速度传感器控制是必要选择。将用于永磁电动机速度观测的模型参考自适应方法移植到发电系统,为了克服直流偏置和积分初值累积以及定子电阻变化导致磁链观测误差较大的问题,提出一种参考模型电压的修正方法,利用理想的电流模型修正电压模型的磁通观察器。并利用小信号模型分析系统的动态性能、算法精度和参数变化的影响。该系统能够适应风速变化和间歇性等特点,准确地估测转子位置,具有实现简单、系统鲁棒性强,动态响应快的优点。仿真和实验结果验证了该方案的正确性和有效性。
The installation of speed sensor is difficult in the direct-driven permanent magnet wind power generation systems. So the sen sorless control is necessary choice. Model reference adaptive system used in permanent magnet motor in generation system. To overcome initial value, drift problems and resistance varies which effect the precision of flux estimate, this paper presents an improved method, which uses ideal current model to correct flux observer of voltage model. And the dynamic performance, the sensorless accuracy and the effect of parameter variations will be addressed in the small-signal model of system. It shows that the system can adapt to the change of wind speed and intermittence of wind. It can accurately estimate the rotor position and also possesses the advantages of simple imple mentation, strong robustness and fast transient response. The good performance of the system obtained from simulation and experimenta tion demonstrates the correctness and availability of the scheme presented.
出处
《控制工程》
CSCD
北大核心
2013年第2期209-212,218,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)
