不平衡电压下采用串联网侧变换器的双馈感应风电系统抑制总输出无功功率波动的方法

专利类型：发明专利

语言：中文

申请号：CN201110427548.0

申请日：20111219

发明人：姚骏廖勇夏先锋李清

申请人：重庆大学

申请人地址：400044 重庆市沙坪坝区沙正街174号

公开日：20130612

公开号：CN102427236B

代理人：李海华

代理机构：重庆博凯知识产权代理有限公司 50212

摘　　要：本发明公开了一种不平衡电压下采用串联网侧变换器的双馈感应风电系统抑制总输出无功功率波动的方法，本方法涉及对串并联网侧变换器以及电机侧变换器的控制，通过特定的方法产生串并联网侧变换器PWM驱动信号以控制串并联网侧变换器，在电网电压不平衡下采用串联网侧变换器的双馈感应发电机不改变转子侧变换器的控制策略，在实现发电机输出功率无二倍频波动、电磁转矩无二倍频波动以及定、转子三相电流平衡的情况下，通过对串联网侧变换器和并联网侧变换器的协调控制，实现整个系统总输出无功功率无二倍频波动，提高在电网电压不平衡电压下DFIG风电系统对电网提供无功功率质量。

主权项：1.不平衡电压下采用串联网侧变换器的双馈感应风电系统抑制总输出无功功率波动的方法，本方法涉及对串联网侧变换器的控制、并联网侧变换器的控制以及电机侧变换器的控制，其特征在于，所述串联网侧变换器的控制步骤为：A1)采集电网三相电压信号u_ga，u_gb，u_gc；A2)采集双馈感应发电机定子三相电压信号u_sa，u_sb，u_sc；A3)将采集的电网三相电压信号u_ga，u_gb，u_gc经静止三相abc坐标系到静止两相αβ坐标轴系恒功率变换得到αβ轴系下的电压e_α，e_β；其中，静止三相abc坐标系到静止两相αβ坐标轴系恒功率变换公式为： $[\begin{matrix} e_{α} \\ e_{β} \end{matrix}] =关键词：法律状态：生效IPC专利分类号： H02J3/18var ShareData = new Array();
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