摘要
新的电力系统运行导则要求风电机组具有低电压穿越能力,需要电压跌落发生器(VSG)来模拟各种类型的电压跌落故障。基于三相自耦变压器和由可控器件IGBT构成的双向开关实现的新型三相VSG,可以方便地控制跌落类型、跌落持续时间、跌落深度和跌落相位。文章对其进行了仿真和实验研究。仿真及实验结果表明,采用所述的VSG方案,可以根据需要方便地模拟各种类型的电压跌落故障,电压跌落及恢复衔接良好,能够为验证风电机组的低电压穿越能力提供有利条件。
Low voltage ride through （LVRT） capability of wind power system is required by new power system operating codes, then voltage sag generator （VSG） is generally used to simulate different voltage sag faults. A novel three-phase VSG is built by three-phase auto- transformer and IGBT based bidirectional switch, can easily control the types of voltage sags, sag duration, sag depth and sag phase. The simulation and experiment is carried out. The results indicate that the proposed VSG can conveniently simulate various types of voltage sag faults, and the voltage transition between normal and fault operation is smooth, then provide favorable conditions to verify the LVRT capability of wind turbines.
出处
《大功率变流技术》
2009年第6期49-52,57,共5页
HIGH POWER CONVERTER TECHNOLOGY
基金
863探索导向项目(2007AA05Z421)
中科院电工研究所所长基金(0710141CS1)
