基于Crowbar控制的DFIG风电机系统低压穿越运行

被引:5
作者
蒋卫宏
机构
[1] 连云港职业技术学院机电工程学院
关键词
双馈感应发电机(DFIG); 电网电压骤降; Crowbar; 不间断运行;
D O I
暂无
中图分类号
TM614 [风能发电];
学科分类号
0807 ;
摘要
紧急电网运行标准要求风力发电机在电网电压跌落的情况下不能从电网中解列,以防引发后继更为严重的电网故障。为了保护励磁变频器,需要采用Crowbar装置在电压跌落时为双馈感应发电机(DFIG)转子浪涌电流提供通路,并限制转子电流的增大。文章提出一种Crowbar控制策略,能够有效抑制转子过电流、直流母线过电压以及电磁转矩的振荡,并帮助电网电压的恢复。仿真结果验证了该控制方式能够使DFIG在大幅电压跌落故障下实现不间断运行,提高了DFIG风电机组运行可靠性。
引用
收藏
页码:104 / 108
页数:5
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