模型参考自适应无速度传感器技术在永磁直驱风力发电系统中应用  

Application of MRAS speed-sensor-less technology to direct drive wind power system

作　　者：付勋波[1,2,3] 张雷[1,2,3] 胡书举[1,2] 许洪华[1,2] 

机构地区：[1]中国科学院风能利用重点实验室 [2]中国科学院电工研究所 [3]中国科学院研究生院

出　　处：《电力自动化设备》2009年第9期90-93,共4页Electric Power Automation Equipment

摘　　要：针对直驱风力发电系统(DDWPS)中测速码盘容易受到干扰的问题提出了一种模型参考自适应系统(MRAS)无速度传感器永磁同步发电机(PMSG)控制方案。选择PMSG本身作为参考模型,电机的电流模型为可调模型,可调模型中的电流和转速量为待估计参数,根据利用Popov超稳定理论得到的自适应律实时地调节可调模型中的电流值,使其与电机定子的实际电流矢量误差收敛于零,同时使可调模型中的转速逼近实际值。利用估计到的转速进行永磁直驱风力发电机的电流闭环矢量控制,电网侧采用PWM整流器的有源逆变工作方式实现直驱系统背靠背变流器的并网发电。给出了DDWPS背靠背变流器的详细控制框图。通过仿真和实验验证了基于MRAS的转速估计方法及DDWPS背靠背变流器控制方案的正确性和可行性。As the speed sensor of wind power generator is sensitive to disturbing signals,a speed-sensor -less control scheme based on MRAS （Model Reference Adaptive System ） for PMSG （Permanent Magnet Synchronous Generator） and a speed estimation method are proposed. The PMSG and its current model are selected as the reference and adjustment models respectively. The current and speed of adjustment model are the parameters to be estimated. The currents are adjusted in real time with the adaptive law,which is derived from the Popov hyperstable theory. The difference between the estimated current vector and the real current vector is converged to zero,as well as the speed of adjustment model to the real speed. The current control loop of PMSG applies the estimated speed and the back-to-back con- verter at grid side works under the active inverting condition. The control scheme of back-to-back converter is given. Simulation and experimental results show the validity and feasibility of the speed estimation based on MRAS and the control strategy of DDWPS back-to-back converter.

关 键 词：直驱风力发电系统 无速度传感器 模型参考自适应系统 永磁同步发电机 Popov超稳定理论 

分 类 号：TM315[电气工程—电机] TP391.9[自动化与计算机技术—计算机应用技术]