Equivalent input disturbance-based robust LFC strategy for power system with wind farms
Equivalent input disturbance-based robust LFC strategy for power system with wind farms
复制标题
基于等效输入扰动的风电场电力系统鲁棒LFC策略
DOI：
10.1049/iet-gtd.2017.1901
复制
发表时间：
2018-03
影响因子：
2.5
通讯作者：
Ma Junjie
中科院分区：
文献类型：
--
作者：
Liu Fang;Ma Junjie
由于风力发电场发电是间歇性的，并网后的风电场在负荷调频（LFC）能力不足以补偿发电与负荷需求之间的不平衡时，可能会出现频率波动较大的问题。本文提出了一种新的抗负荷扰动和风力波动的鲁棒LFC策略，以提高风电场电力系统的抗扰动性能。首先，在不考虑准确模型信息的情况下，建立了具有风电场的电力系统的简化模型。在此基础上，提出了一种基于等效输入扰动补偿的控制方案，并给出了一种等效输入扰动估计方法。鲁棒LFC设计解决了电力系统的各种干扰和内部/外部不确定性。最后，为了评估所提方法的有效性，进行了两个案例研究，并与经典的比例-积分-导数控制方案进行了性能比较，以验证所提方法的有效性。
Due to the intermittent power generation, wind farms integrated into the grid may cause a problem of large frequency fluctuation, when the capacity of load frequency control (LFC) is not enough to compensate the unbalance between the generation and the load demand. In this study, a new robust LFC strategy against load disturbance and wind power fluctuation is proposed to improve the disturbance-resistant performance of the power system with wind farms. First, a simplified model of the power system with wind farms is established without considering the accurate model information. Then, a control scheme based on the compensation of equivalent input disturbance (EID) is introduced, and a method of EID estimation is presented. The robust LFC design addresses various disturbances and internal/external uncertainties of power systems. Finally, to evaluate the effectiveness of the proposed method, two case studies are carried out and the performance comparisons with the classical proportional–integral–derivative control scheme are used to confirm the proposed method.