摘要
随着风力发电大规模接入内蒙古电网,风电机组的动态特性对电力系统的影响日益严重。基于双馈型风电机组定子磁链,定、转子电流等变量的响应特性方程,深入分析了当发生电网电压对称跌落故障时双馈型风电机组电磁响应特性,并绘制出在电网电压跌落、恢复时刻定子磁链的时域微分方程和运动轨迹,分析结论为:影响双馈型风电机组动态特性变化的主要因素有电压跌落深度、跌落前发电机运行转速以及发电机参数特性等;电压跌落程度越深、跌落前发电机转速越高,其暂态响应越剧烈;发电机结构参数决定指数衰减因子,进而决定了电磁变量动态影响时间。
As the capacity of wind power grid in Inner Mongolia grid increases greatly in recent years, the influence of dynamic characteristics in doubly-fed wind turbine generator （DFWTG） to steady operation of power grid is growing. The basic controlling equations of DFWTG under stator flux orientation, and stator and rotor current were deduced. The theoretical analysis of DFWTG transient electro-magnetic response characteristics and dynamic electro-mechanical response characteristics were conducted respectively. The time-domain differential equation of stator flux and its motion trail at the time of grid voltage drop and recovery were derived. The relevant factors that influence the degree of DFWTG transient response under grid voltage drop fault were proposed.
出处
《内蒙古电力技术》
2013年第3期20-23,28,共5页
Inner Mongolia Electric Power
关键词
双馈型风电机组
电网电压对称跌落
动态特性
电磁响应
doubly-fed wind turbine generator （DFWTG）
grid vohage symmetric drop
dynamic characteristics
electro-magnetic response
