风电场整合对系统小干扰稳定的影响研究

Study on the Small Signal Stability of Electric Power System in Respect of Wind Farm Integrated

论述了异步风电机组、双馈变速风电机组和永磁直驱风电机组三种风电机组并网后对系统低频振荡模态及阻尼特性影响的机理。以实际电力系统为例，在考虑风电场出力变化的情况下，用特征值分析方法研究了三种类型风电机组引入的振荡模态，得出如下结论：风电场采用异步风电机组能够对系统振荡起到阻尼作用，而采用双馈变速风电机组和永磁直驱风电机组在某种程度上降低了系统阻尼。

How the wind farms, which are mtegrated into power systems respectively with asynchronous generators, doubly-fedinduction generators （DFIG） or permanent synchronous generators （PMSG）, impact the low frequency oscillation modes and dampingcharacteristics of the power system is discussed in this paper. Taking a practical power system as an example and considering various output of wind farm, the paper studies the oscillation modes of power system with different kinds of wind turbines generators, and gets a conclusion that the asynchronous generator can make damping to the power system while the DFIG and PMSG will lower the damping characteristics of the power system.