基于定子阻值辨识的直驱风电系统无速度传感器技术  

Speed-sensorless control based on stator resistance estimation for direct-driven wind power system

作　　者：章国宝[1] 魏自聪[1] 祖晖[1] 蔡学波[1] 

机构地区：[1]东南大学自动化学院,江苏南京210096

出　　处：《电力自动化设备》2012年第3期94-98,共5页Electric Power Automation Equipment

摘　　要：为消除直驱式风电系统因测速码盘带来的故障,提出基于定子阻值辨识和跟踪微分器(TD)的永磁同步发电机(PMSG)无速度传感器控制技术。无速度传感器算法中所用到的电流微分项采用TD进行提取,对随环境变化的定子阻值参数提出一种改进模型参考自适应系统(MRAS)算法进行在线辨识,并对定子阻值辨识算法进行了证明。TD的引入提高了发电机动态运行时转速观测的精确度,定子阻值在线辨识抑制了电阻参数变化带来的扰动。仿真结果验证了所提算法的有效性。To avoid the speed encoder failure of direct-driven wind power generation system,the speed-sensorless control of PMSG（Permanent Magnet Synchronous Generator） is proposed,which is based on the TD（Tracking Differentiator） and stator resistance estimation.The TD is used to get the current differential parameters for PMSG speed estimation.An improved MRAS（Model Reference Adaptive System） algorithm is applied to online estimate the varying stator resistance and its stability is proved,which improves the speed estimation accuracy,suppresses the disturbance and enhances algorithm robustness.Its validity is verified by simulative results.

关 键 词：风电 直驱式 无速度传感器 跟踪微分器 定子阻值辨识 

分 类 号：TM614[电气工程—电力系统及自动化]