基于变结构控制的双馈风机空载并网方法  

No-load Grid-connection Method for Doubly-fed Fans Based on Variable Structure Control

作　　者：田云飞 张海平 彭婧 兰泽华 TIAN Yun-fei;ZHANG Hai-ping;PENG Jing;LAN Ze-hua(Development Business Department of State Grid Gansu Electric Power Company,Lanzhou 730030,China)

机构地区：[1]国网甘肃省电力公司发展事业部,甘肃兰州730030 [2]甘肃电通电力工程设计咨询有限公司,甘肃兰州730030

出　　处：《电力电子技术》2023年第10期39-42,共4页Power Electronics

基　　金：国家电网科技重大专项(22ZD11GA314);甘肃省重点人才项目(6660010201)。

摘　　要：通过分析交流励磁变速恒频双馈风机(DFIG)的运行特点,在考虑到并网瞬间网侧变流器电流波动的情况下,建立了DFIG的数学模型。根据矢量控制方法,设计了一种变速恒频DFIG的滑模变结构并网控制方法,使系统对电网电压波动和内部参数摄动都具有较好的鲁棒性。分别构建了基于滑模变结构的DFIG控制系统的仿真模型及实验室的背靠背实验台,证明了所提滑模变结构的控制系统具有更好的动态响应和鲁棒性。By analyzing the operation characteristics of AC excitation variable speed constant frequency doubly fed induction generator(DFIG),the mathematical model of DFIG is established considering the current fluctuation of the converter at the grid-connected moment.According to the vector control method,a sliding mode variable structure gridconnected control method of variable speed constant frequency DFIG is designed,which makes the system robust to voltage fluctuation and internal parameter perturbation.The simulation model of the control system of DFIG based on sliding mode variable structure and the back-to-back experimental bench in the laboratory are constructed respectively,which proves that the control system with sliding mode variable structure has better dynamic response and robustness.

关 键 词：双馈风机 变速恒频 滑模变结构 

分 类 号：TM712[电气工程—电力系统及自动化]