大规模风电接入场景下的失步振荡中心定位方法  

Out-of-step oscillation center location method in a large-scale wind power integration scenario

作　　者：李振兴[1] 崔丹阳 胡聪 朱益 翁汉琍[1] LI Zhenxing;CUI Danyang;HU Cong;ZHU Yi;WENG Hanli(Hubei Provincial Collaborative Innovation Center for New Energy Microgrid,China Three Gorges University,Yichang 443002,China)

机构地区：[1]新能源微电网湖北省协同创新中心(三峡大学),湖北宜昌443002

出　　处：《电力系统保护与控制》2024年第14期1-12,共12页Power System Protection and Control

基　　金：国家自然科学基金项目资助(52077120)。

摘　　要：振荡中心的准确定位是失步保护正确动作的基础,大规模风电并网导致系统阻抗参数发生变化,使得传统基于阻抗轨迹的失步定位方法的适应性严重下降。针对该问题,提出基于节点频差的失步振荡中心定位方法。首先分析大规模风电并网对系统总阻抗的影响。进一步根据发电机功角,计算其曼哈顿距离相似度并构建启动判据。最后,通过移动平均法对广域测量频率进行平滑处理,提出基于节点频差的失步振荡中心定位方法。仿真验证表明,所提基于节点频差的失步振荡中心定位方法受噪声影响较小,不受风电渗透率的影响,能够准确定位失步振荡中心位置。The accurate positioning of the oscillation center is the basis for correct action in out-of-step protection.Large-scale wind power integration causes system impedance parameters to change, resulting in a serious deterioration in the adaptability of the traditional out-of-step positioning method based on the impedance trajectory. To tackle this problem, an out-of-step oscillation center location method based on bus frequency is proposed. First, the influence of large-scale wind power integration on the total impedance of the system is analyzed. Further, from the power angle of the generator, the Manhattan distance similarity is calculated and a start-up criterion is constructed. Finally, the moving average method is used to smooth the wide-area measurement frequency, and an out-of-step oscillation center location method based on node frequency difference is proposed. Simulation results show that the proposed method is less affected by noise and is not affected by wind power penetration rate, and can accurately locate the out-of-step oscillation center.

关 键 词：双馈风机 风电渗透率 等效阻抗 同步机组失步 节点电压频差 振荡中心定位 

分 类 号：TM614[电气工程—电力系统及自动化] TM712