包含风电场电力系统的小干扰稳定分析建模和仿真

为了研究风电场和电力系统相互作用的稳定性,提出一种用于小干扰稳定分析的风力发电机组的数学模型.应用该建模方法对风电场接入无穷大系统和接入三机系统的两种情况进行了计算,研究了风电场接入系统后影响系统小干扰稳定性的因素.算例分析表明,与风电机强相关的振荡模式有着很好的阻尼;与电力系统相连时,风电场对与大系统中其它同步发电机强相关的振荡模式影响很小.该建模方法为包含风电场电力系统的小干扰稳定分析提供了理论依据和实用工具.

MODELING AND SIMULATION FOR SMALL SIGNAL STABILITY ANALYSIS OF POWER SYSTEM CONTAINING WIND FARM

To research the stability of interaction between wind farm and power system a mathematical model of wind turbines for small signal stability analysis is presented. A mathematical model of wind power generation sets for small signal stability analysis is established. Using this modeling method two situations are calculated in which the wind power generation sets are connected to infinitive bus system or to three-machine system respectively, and the factors influencing the small signal stability of power system connected with wind farm are researched. The results of simulation show that the oscillation model related to wind turbines possesses good damping coefficient, when the wind turbines are connected with power system the influence of wind farm on other synchronous generators in large power system is considerably weak. This modeling method provides theoretical foundation and a practical tool for the small signal stability analysis of the power system containing wind farm.