电压两次跌落对双馈型风电机组的影响分析

Impacts on DFIG Wind Turbine During the Voltage Double-Dip

对于电压跌落,存在电压连续两次跌落的现象。指出了电压会发生两次跌落的现象,分析了双馈型风电机组在电压跌落过程中定子磁链衰减变化现象。结果表明在电压发生第二次跌落时,应考虑定子磁链初始值的问题。通过现场试验结果,验证了未考虑定子磁链初始值,两次电压跌落的间隔时间不同对风电机组的影响。

Voltage double-dip is one of voltage dips in the power system. This paper, first of all, introduces the phenomenon of voltage double-dip; secondly it explores the stator flux attenuation of the DFIG wind turbine in the course of the voltage dip. The results show that when the second voltage dip occurs, the initial value of the stator flux should be considered. Finally, the on-site testing results verify the impact of the different interval of two voltage dips on the wind turbine with the initial value of the stator flux not considered.