基于等效风速的双馈风力发电机动偏心故障特性分析  

Analysis of dynamic eccentric fault characteristics of doubly-fed induction generator based on equivalent wind speed

作　　者：绳晓玲[1] 邓祖贤 万书亭[1] 韩旭超 豆龙江[1] 张雄[1] Sheng Xiaoling;Deng Zuxian;Wan Shuting;Han Xuchao;Dou Longjiang;Zhang Xiong(Hebei Key Laboratory of Electric Machinery Health Maintenance&Failure Prevention,North China Electric Power University,Baoding 071003,China)

机构地区：[1]华北电力大学电力机械装备健康维护与失效预防河北省重点实验室,河北保定071003

出　　处：《可再生能源》2023年第12期1605-1611,共7页Renewable Energy Resources

基　　金：国家自然科学基金(52275109,52105098);河北省自然科学基金(E2022502007,E2021502038);保定市科技计划基础研究专项基金(2172P010)。

摘　　要：文章综合考虑了自然条件下风剪切和塔影效应造成的风速时空分布差异问题,研究如何更好地辨识实际工况下双馈风力发电机气隙偏心的故障特征。首先对气隙偏心故障特征进行理论分析,推导得到了考虑风速时空分布差异时,偏心故障导致的发电机电磁特性变化规律;最后进行了仿真研究和实验验证。实验结果表明,风速时空分布差异会导致气动转矩产生波动,最终引起发电机电磁参量和风速分布参数的耦合,产生新的故障特征。研究结果完善了双馈风电机组故障诊断理论,对实际故障诊断有一定的理论参考价值。In order to better identify the air-gap eccentric fault characteristics of the doubly-fed induction generator under the actual running condition,the spatial-temporal distribution difference of wind speed based on the effects of wind shear and tower shadow under natural condition are comprehensively considered.First,the fault characteristics are theoretically analyzed,and the electrical and magnetic characteristics of generator caused by air-gap eccentric fault are derived under the influence of wind speed spatio-temporal distribution.Simulation and experimental validation are then performed.The results show that the difference of wind speed spatial and temporal distribution leads to the fluctuation of aerodynamic torque,and finally leads to the coupling of electromagnetic parameters and wind speed distribution parameters of the generator,resulting in new fault characteristics.The research results improve the fault diagnosis theory of doubly-fed wind turbines,which has certain theoretical guiding significance for actual fault diagnosis.

关 键 词：风力发电机 故障诊断 时空分布 动偏心 故障特征 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程]