双馈感应风力发电系统低电压穿越转子侧新型控制方法  

A New Rotor-Side Control Method for Low Voltage Across of Double-Fed Induction Wind Power Systems

作　　者：安琴[1] 齐康[1] 

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048

出　　处：《信息与控制》2013年第1期111-116,共6页Information and Control

摘　　要：建立了增加定子励磁电流变化的双馈感应风力发电系统数学模型,分析了电网电压跌落时以及电压恢复后系统的响应特性.针对电网电压大值跌落的情况,提出了一种低电压穿越控制方案:首先在转子侧变换器定子磁链定向的矢量控制方案中引入一个补偿项——定子励磁电流的微分项;在此基础上,在发电机的转子侧串联电阻.仿真结果表明,该方法在电网电压大值跌落时,能够对定、转子侧的过电压过电流有明显的抑制作用.A mathematical model of double-fed induction wind power system with the stator field current variation is established, and the response property under the circumstance of voltage fall and normal state is analyzed. A control scheme to solve the problem of low voltage fall across is proposed. Firstly, a compensation item （the stator flux linkage current differential item） is added into the control scheme of stator flux oriented in rotor-side changer. On this basis, cascade resistors are connected at rotor side of the generator. The simulation result shows that this method can restrain overvoltage and overcurrent of stator-side and rotor-side obviouslv when the grid voltage drops.

关 键 词：双馈感应发电机(DFIG) 低电压穿越 控制策略 

分 类 号：TM310[电气工程—电机]