摘要
介绍了变速恒频风力发电系统结构以及变换器在变速恒频风力发电系统机侧和网侧的控制模型。分析比较了二极管箝位型三电平拓扑与传统两电平拓扑变换器的损耗,包括功率开关器件导通损耗、开关损耗以及滤波电感的损耗。分析比较了两种变换器输出仿真波形。对两种变换器分别用于变速恒频风力发电系统中机侧和网侧的仿真波形进行分析比较。仿真结果表明,在变速恒频风力发电系统中,相对于传统的两电平变换器,三电平变换器有效降低了损耗,减小了纹波电流,输出电平增多,减小了电压变化,使波形质量得到了很好的改善,适用于变速恒频双馈风力发电系统。
The variable speed constant frequency wind power generation system was introduced in this paper. The converter control model used in variable speed constant frequency wind power generation system in its machine side and grid side was also introduced. The losses of two-level and three-level converter were compared. The losses included power switching device conduction losses, switching losses and the filter inductor losses. Two kinds of converter output simulation waveforms were analyzed and compared. The simulation waveforms of VSCF wind power generation system in its grid side and machine side were analyzed and compared. The simulation results show that, compared with the traditional two-level converter in the VSCF wind power generation system, the three-level converter effectively reduces the losses reduces the ripple current. The output level is increased. The diversifications of voltage were reduced. The waveform quality is very good improvement. Three-level converter is suitable for VSCF doubly fed wind power generation system.
出处
《电源技术》
CAS
CSCD
北大核心
2012年第9期1340-1343,1393,共5页
Chinese Journal of Power Sources
基金
陕西省科技计划工业攻关资助项目(2012K06-46)
陕西省重点学科建设专项资金资助项目(10700-080903)
西安市科技计划项目[CXY1129(5)]
关键词
两电平变换器
三电平变换器
空间电压矢量脉宽调制
变速恒频风力发电系统
two-level converter
three-level converter
space vector pulse width modulation （SVPWM）
variable speed constant frequency （VSCF） wind power generation system
