风电场机网扭振的小信号建模及仿真  

Small Signal Modeling and Simulation for Torsional Vibration of Wind Farms

作　　者：鲁玉普 解大[1] 孙俊博 娄宇成[1] 张延迟[2] 王西田[1] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海市闵行区200240 [2]上海电机学院电气学院,上海市闵行区200240

出　　处：《电网技术》2016年第4期1120-1127,共8页Power System Technology

基　　金：国家自然科学基金项目(51277119)~~

摘　　要：风电场实际运行监测结果显示,机网扭振问题已严重制约了风电机组的使用年限。而相比于单个风电机组,多个相同风电机组组成的单一机型风电场的机网扭振会发生传递。实际风电场多采用不同机型的风电机组互补运行,机网扭振特性的变化更加复杂。先建立常见的失速、双馈、永磁直驱3种风电机组的单机小信号模型和对应的3种单一机型风电场模型,然后建立双馈?永磁直驱、失速?双馈和失速?永磁直驱3种混合机型风电场模型。通过模态分析法和相关因子分析了风电机组间的扭振传递作用,并总结出所有单一机型风电场和混合机型风电场的机网扭振特性。Data from wind farm monitoring show that torsional vibration poses severe effect on service life of wind turbines（WTs）. Torsional vibration mode of onefold wind farms containing the same WTs is remarkably different from that of single wind turbine. Hybrid wind farms containing different types of WTs are often built to realize WTs＇ complementary operation, making torsional vibration more complex. Small signal models for fixed speed induction generator（FSIG）, doubly fed induction generator（DFIG） and permanent magnet synchronous generators（PMSG） and three corresponding onefold wind farms were established. Also three kinds of hybrid wind farm models were proposed for DFIG-PMSG, FSIG-DFIG and FSIG-PMSG wind farms. Modal analysis and correlation factors were employed to investigate torsional vibration transfer effect among WTs. Finally, torsional vibration characteristics of onefold and hybrid wind farms were concluded.

关 键 词：机网扭振 单一机型风电场 混合机型风电场 模态分析 相关因子 

分 类 号：TM72[电气工程—电力系统及自动化]