双馈风电机组动力学特性与电力系统动态行为的交互影响分析  

Analysis of Interaction Between Dynamics Characteristics of DFIG and Dynamic Behavior of Power System

作　　者：和萍[1] 曲忠杰 李从善[1] 耿斯涵 姚依林[1] HE Ping;QU Zhongjie;LI Congshan;GENG Sihan;YAO Yilin(School of Electrics and Information Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China)

机构地区：[1]郑州轻工业学院电气信息工程学院

出　　处：《电力系统及其自动化学报》2019年第5期70-76,共7页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金资助项目(51507157,51607158);郑州轻工业学院博士科研基金项目(2014BSJJ043)

摘　　要：风力发电是目前利用可再生能源最有效方式之一。风电渗透率的不断提高使其对电力系统的影响更加明显,研究其动力学特性与电力系统动态行为的交互影响确保电力系统的稳定运行具有重要意义。首先基于完整的双馈风电机组数学模型,在IEEE4机2区域系统上,采用特征根分析和时域仿真分析研究了双馈风电机组参数的变化对系统动态特性的影响,分析了调速器参数对风电并网后系统动态响应的影响,并从DFIG并网接入点、并网容量以及联络线传输功率等多方面研究了其与电力系统的交互影响。结果表明:双馈风电机组并网后,调速器的加入可以改善系统的动态响应;适当地增大双馈风电机的定子电阻,有利于系统的稳定;双馈风电机组的并网接入点、联络线传送功率以及出力水平对系统的鲁棒性有不同程度的影响。Wind power generation is currently one of the most effective ways to utilize renewable energy.The impact of the increasing penetration of wind power on power system is becoming more obvious,thus the study on the interaction between the dynamics characteristics of wind power and the dynamic behavior of power system is of significance to ensuring the stable operation of power system.In this paper,based on the complete model of doubly fed induction genera.tor(DFIG),by employing eigenvalue analysis and time-domain simulation analysis,the influences of parameters of DFIG on the dynamic characteristics of power system are studied with an IEEE 4-machine 2-area system as a numerical example,and the influences of parameters of turbine governor(TG)on the system’s dynamic response after the connection of wind power are analyzed;the interaction between DFIG and power system is studied in view of several factors,including the grid connection points and capacity of DFIG,as well as the transmission power of tie line.Results demonstrate that the system’s dynamic response can be improved by adding TG after the connection of DFIG;a proper increase in the DFIG’s stator resistance is beneficial to the system stability;the grid connection points of DFIG,the transmission power of tie line,and the output level have varying degrees of influence on the robustness of the system.

关 键 词：双馈风电机组 电力系统 特征根分析 交互影响 

分 类 号：TM7[电气工程—电力系统及自动化]