定桨距风力发电机非并网系统内模控制  

Internal model control of non-grid system of fixed-pitch wind turbine

作　　者：马运东[1] 胡祖荣[1] 王俊琦[1] 王芳[2] 邢岩[1] 

机构地区：[1]南京航空航天大学航空电源航空科技重点实验室,南京210016 [2]南京工业职业技术学院自动化系,南京210046

出　　处：《东南大学学报（自然科学版）》2010年第4期778-782,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家重点基础研究发展计划(973计划)资助项目(2007CB210303)

摘　　要：以定桨距风力发电机为例,对非并网风力发电机的稳定问题进行了分析研究,提出采用内模控制方法消除定桨距风力发电系统本身存在的正反馈效应,设计出稳定的控制系统.在系统中采用检测风速的控制方法,由风速检测值得到转速参考值,根据转速参考值与反馈值之间的误差信号得到发电机转矩参考值,转矩控制系统通过调节其输出端电流控制实际的电磁转矩,使其随参考值变化以实现变速运行.基于实时仿真系统RT-LAB进行了半实物实时仿真实验.实验结果表明:通过内模控制,定桨距风力发电机非并网系统可以在设计风速范围内稳定运行,达到了并网变桨距变速风力机的发电效果.The stability of a non-grid system of fixed-pitch wind turbine is analyzed,and the method of internal model control is proposed to eliminate the positive feedback of the fixed-pitch wind turbine.Meanwhile the control system is designed.In the system,wind speed testing method is used.The speed reference value is obtained through the testing value of the wind speed,and the generator torque reference value is obtained through the error of the speed reference value and the feedback value.The torque control system controls the actual electromagnetic torque through the output current changing,which makes the actual electromagnetic torque follow the change of reference value to achieve variable speed operation.Based on the RT-LAB（real-time simulation platform）,real-time simulation was conducted.Experimental results indicate that with the internal model control the non-grid system with fixed-pitch wind turbine is stable in a designing area of wind speed,and can be operated not only for MPPT（maximum power point tracking） in low wind speed but also for constant power control in high wind speed.

关 键 词：风力发电 非并网 定桨距 内模控制 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程] TM614[电气工程—电力系统及自动化]