基于拓展等效开环过程的多DFIG风电场振荡模态交互路径分析  

Analysis to Interaction Paths of Oscillation Modes in Multi-DFIG Wind Farm Based on Extended Effective Open-loop Process

作　　者：叶剑桥 李生虎[1] 齐楠 陶帝文 YE Jianqiao;LI Shenghu;QI Nan;TAO Diwen(Anhui Province Key Laboratory of Renewable Energy Utilization and Energy Saving(School of Electrical and Automation Engineering,Hefei University of Technology),Hefei 230009,Anhui Province,China)

机构地区：[1]新能源利用与节能安徽省重点实验室(合肥工业大学电气与自动化工程学院),安徽省合肥市230009

出　　处：《中国电机工程学报》2025年第3期973-985,I0014,共14页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：国家自然科学家基金项目(51877061)。

摘　　要：随着风电规模扩大,风电场内部振荡风险加剧。现有振荡建模常把风电场等值为单台机组,忽略由风电机组间动态交互引发的振荡问题;现有振荡研究方法难以解释风电机组间交互作用过程。该文提出拓展等效开环传递过程(extended effective open-loop process,EEOP),以分析多双馈感应发电机(doubly-fed induction generator,DFIG)风电场振荡模态的交互路径。首先,建立频域下多DFIG风电场传递函数矩阵反馈连接模型。基于DFIG两输入两输出特性重新划分传递函数矩阵,拓展EOP理论。推导多DFIG风电场等效开环传递函数,得到多DFIG间交互作用的解析表达以绘制交互路径,揭示多DFIG间的振荡传递过程和耦合关系。然后,基于2-范数和广义奈奎斯特理论,提出量化交互路径增益及其对风电场振荡特性影响的评估指标。最后,仿真分析风速、控制参数对交互作用的影响,验证交互路径和评估指标的正确性和有效性。With increasing wind power,the oscillation risk inside the wind farm is realistic.The existing modeling of the oscillation aggregates the wind farm to a wind turbine generator(WTG),ignoring the dynamic interaction among the WTGs.The existing theoretical method fails to explain the interaction process and the coupling among the WTGs.In this paper,an extended effective open-loop process(EEOP)is newly proposed to analyze the interaction paths among the doubly-fed induction generators(DFIGs)in the wind farm.At first,a linearized feedback connection model based on the transfer function matrix in the frequency domain is derived for multiple DFIGs.Based on the two-input two-output model of the DFIG,the transfer function of the wind farm is rearranged to newly extend the EOP theory.The open-loop transfer function of the DFIGs is derived to find analytical expression of the interaction among the DFIGs and draw the interaction paths to reveal the transfer process and coupling among the DFIGs.The indicators based on the 2-norm and generalized Nyquist theory are proposed to quantify the gain of the interaction paths and its effects on the oscillation of the wind farm.Finally,the simulation results validate the effect of the wind speed and the control parameters on the interaction and verify the correctness and effectiveness of the proposed interaction paths and the indicators.

关 键 词：风电场 振荡 交互路径 拓展等效开环过程(EEOP) 广义奈奎斯特 双馈感应发电机 

分 类 号：TM71[电气工程—电力系统及自动化]