基于控制参数分群的DFIG并网系统低频振荡抑制  

Low-frequency oscillation damping in DFIG-integrated power systems based on control parameter grouping

作　　者：李生虎[1] 张奥博 颜云松 韩伟 宋闯 Li Shenghu;Zhang Aobo;Yan Yunsong;Han Wei;Song Chuang(Hefei University of Technology,School of Electrical Engineering and Automation,Hefei 230009,China;NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing 211106,China;State Grid Henan Electric Power Research Institute,Zhengzhou 450052,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009 [2]南瑞集团有限公司国网电力科学研究院有限公司,江苏南京211106 [3]国网河南省电力公司电力科学研究院,河南郑州450052

出　　处：《可再生能源》2022年第12期1650-1657,共8页Renewable Energy Resources

基　　金：国家电网公司总部科技项目(52170221000U)。

摘　　要：通过整定控制参数,可以抑制大规模双馈感应发电机并网引起的电网低频振荡,但基于特征值灵敏度选择的主导控制参数,在不同场景和模式下,可能引起相反效果。文章建立了风电系统低频振荡模式阻尼比灵敏度的解析表达。根据阻尼裕度确定模式危险程度,将上述灵敏度加权,提出累积阻尼比灵敏度以描述参数调节对所有模式阻尼比的整体效果。考虑风速与负荷随机波动,采用模糊C均值(FCM)聚类算法,对运行场景归类,将场景分布概率作为权系数,计算多场景下累积阻尼比灵敏度、对控制参数分群。特征值分析和时域仿真结果验证了所提控制参数分群算法对低频振荡模式的抑制效果。Integration of bulk wind power(e.g.doubly-fed induction generators,DFIGs)adds the difficulty to damp the low-frequency oscillations(LFOs)in power system,which may be alleviated by adjusting the control parameters.The dominant parameters selected with the eigen-sensitivity model may have opposite effects in different scenes and to different modes.This paper derives the analytical sensitivity model of the damping ratio of the LFO modes in the wind power system.The severity of the modes is quantified by the margin of the damping ratio to weight the sensitivities.The cumulative damping ratio sensitivity is proposed to quantify the total effect of parameter adjustment on damping ratios.Considering random fluctuation of wind speed and load,the fuzzy C-means(FCM)clustering algorithm is applied to classify the operating scenarios whose distribution probabilities are used as the weight to quantify the cumulative damping ratio sensitivity in multiple scenarios,and group the control parameters.The eigenvalue analysis and time domain simulation validates the effect of the proposed control parameter clustering algorithm on damping the LFO modes.

关 键 词：双馈感应发电机 低频振荡 主导控制参数 累积阻尼比灵敏度 运行场景分裂 

分 类 号：TK51[动力工程及工程热物理—热能工程]