摘要
针对电网电压不对称跌落故障,提出一种用于双馈风机的变流器控制策略,以满足低电压穿越标准的要求。策略使用转子侧变流器控制转子正序电流以保证风机的有功和无功输出,网侧变流器保持额定电流输出能量,同时使用斩波器稳定直流母线电压。针对1.5 MW双馈风电机组进行了仿真模型和实际测试验证,结果表明该策略有效保证了双馈风机系统低电压穿越的实现。
Considering the asymmetric grid voltage drop failure,a converter control strategy of doubly-fed induction generator（ DFIG）is proposed to satisfy the lowvoltage ride through standards. In this strategy,the rotor side converter controls the positive sequence current to ensure the active and reactive power output,the grid side converter keeps the rated current output,and the chopper stabilizes the DC link voltage. Taking an 1. 5 MW wind turbine as the example,computer simulations and test verification are carried out and the results showthat this strategy can effectively guarantee the lowvoltage ride through of DFIGs.
出处
《南方电网技术》
北大核心
2015年第5期88-93,共6页
Southern Power System Technology
关键词
双馈风力发电
低电压穿越
不对称跌落
转子侧变流器
网侧变流器
doubly-fed wind power
lowvoltage ride through（LVRT）
asymmetric sag
rotor side converter
grid side converter
