基于Crowbar的双馈风机LVRT特性研究  

Study of LVRT ability of DFIG wind turbine based on Crowbar

作　　者：丁明[1] 胡腾华[1] 韩平平[1] 杨淑英[1] 王冬君[1] 

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥23009

出　　处：《合肥工业大学学报（自然科学版）》2013年第4期410-415,497,共7页Journal of Hefei University of Technology：Natural Science

基　　金：国家科技支撑计划资助项目(2011BAA07B05);国家自然科学基金资助项目(51107025);高等学校博士学科点专项科研基金资助项目(新教师类)(20100111120018)

摘　　要：文章从变流器、风电机组安全和风力发电系统快速平稳恢复稳定角度出发,讨论了Crowbar电阻和Crowbar电路投入运行持续时间选取原则,搭建了双馈风电机组低电压穿越仿真模型,模拟了电网电压跌落故障情况下,不同Crowbar阻值对低电压穿越功能的影响,从电网故障期间是否考虑双馈风电机组无功功率补偿能力方面,研究了Crowbar电路投入运行持续时间对低电压穿越功能的影响。仿真结果表明,合理的Crowbar电阻取值和投入运行持续时间可以提高双馈风电机组的低电压穿越能力,有利于风力发电系统快速平稳地恢复稳定。The principle of choosing Crowbar circuit resistance and its input lasting time is discussed from the viewpoint of converter security, wind turbine security and wind power generation system re- storing stability. A simulation model of doubly-fed induction generator（DFIG） is built and the impact of different Crowbar circuit resistances on low voltage ride through（LVRT） ability with grid voltage dip fault is simulated. And the impact of the input lasting time of Crowbar circuit on LVRT ability with consideration of DFIG reactive power compensation ability or not during grid fault is also simula- ted based on this model. The simulation results show that reasonable Crowbar circuit resistance and its input lasting time can improve LVRT ability of DFIG and are helpful for the wind power generation system to restore stability quickly and smoothly.

关 键 词：双馈感应发电机 暂态特性 低电压穿越 CROWBAR电路 无功功率补偿 

分 类 号：TM614[电气工程—电力系统及自动化]