考虑最优转子动能的风电场自适应频率控制策略

Adaptive frequency control strategy of wind farm considering optimal rotor kinetic energy

文章提出了一种考虑最优转子动能的风电场自适应频率控制策略。该控制策略通过转子转速与桨距角协调控制,使得风电机组具有更多的可释放转子动能,且频率下垂控制系数通过当前的转子动能的大小进行自适应调节。最后,在PSCAD/EMTDC环境中建立仿真模型,对所提控制策略进行了验证。结果表明,所提控制策略能够更大程度地利用风电场蕴含的转子动能,有效提升了风电场的频率支撑效果。

This paper proposes a wind farm adaptive frequency control strategy that takes into account the optimal rotor kinetic energy.The strategy controls the rotor overspeed and the pitch angle control in coordination to make the wind turbine have more releasable rotor kinetic energy,and the droop control coefficient is adaptively adjusted according to the current rotor kinetic energy.Finally,a simulation model was established in the PSCAD/EMTDC environment to verify the proposed strategy.The results show that the proposed strategy can make greater use of the rotor kinetic energy contained in the wind farm,and effectively improve the frequency support effect of the wind farm.