风特性对风力发电机组输出功率的影响

摘要

为了准确研究不同类型的风速对并网风电机组输出功率的影响,建立了并网风力发电机模型和不同类型风速的模型.在不同类型风速的扰动下,对异步风电机输出功率的波动进行了仿真分析:针对引起功率振荡最严重的阵风,进行了不同频率的阵风扰动下风电机组功率振荡的比较,对阵风扰动下风电机组间的相互影响进行了仿真分析.结果表明,在相同幅值的扰动下,阵风引起的风电机组功率振荡最严重,机组功率振荡情况与阵风扰动的频率有关,单台机组在阵风扰动下产生的振荡对其他机组也会产生一定的影响.%In order to analyze accurately the factors and rules of influencing the power oscillation of a grid-connected wind turbine generator system,the analysis for power oscillation of a wind turbine generator system is proposed according to different type of wind speed. Firstly, the mathematical models of the grid -connected wind turbine and the wind speed models are proposed. Secondly, according to different type of wind speed disturbance,simulations on the active power oscillation of the WTGs are investigated. Considering gust cause the most serious power oscillation, the active power oscillations are compared under different gust frequencies. Finally, simulations on the interaction between WTGs are also investigated. The compared results show that under the same amplitude perturbations,the gust of wind causes the most serious power oscillation; the power oscillation is related to the frequency of gust; the gust disturbance in a single WTG unit has some impact on the others.