考虑风速分区的双馈风机并网小干扰稳定分析  

Small-Signal Stability Analysis on Grid Connection of DFIG Considering Wind Speed Partition

作　　者：贾燕冰[1] 李玉博 麻金碧 田晋杰 王金浩 李慧蓬 JIA Yanbing;LI Yubo;MA Jinbi;TIAN Jinjie;WANG Jinhao;LI Huipeng(Shanxi Key Laboratory of Power System Operation and Control（Taiyuan University of Technology）,Taiyuan 030024,China;Electric Power Research Institute of State Grid Shanxi Electric Power Company,Taiyuan 030001,China)

机构地区：[1]电力系统运行与控制山西省重点实验室(太原理工大学),太原市030024 [2]国网山西省电力公司电力科学研究院,太原市030001

出　　处：《电力建设》2018年第7期97-106,共10页Electric Power Construction

基　　金：山西省煤基重点科技攻关项目(MD2014-06);国网山西省电力公司科技项目(52053016000W)~~

摘　　要：为准确分析双馈风机并网对电网小干扰稳定性的影响,双馈风机低于额定风速运行时,根据功率特性和机械特性将其分为最大功率跟踪区和恒转速区2个分区。针对双馈风机-无穷大系统,采用李雅普诺夫线性化方法,分别建立最大功率跟踪区和恒转速区13阶小信号模型,采用特征根分析法,对比分析了各分区变换器控制器参数和风速对双馈风机-无穷大系统小干扰稳定性的影响。算例结果表明:2个分区内系统小干扰稳定的参数可行域不同,系统小干扰稳定特性不同,低于额定风速下进行分区研究可以更加精确地评估风机并网的小干扰稳定特性。In order to analyze the influence of grid-connected doubly-fed induction generators（ DFIG） in wind farm on small-signal stability of power grid,operation mode of DFIG is divided into two zones below rated wind speed,which are the maximum power tracking zone and the constant angle speed zone. Aiming at the DFIG and infinite bus,13 th-order small signal models in the maximum power tracking zone and the constant angle speed zone are established respectively by Lyapunov linearization method. The influence of control parameters and wind speed on the small-signal stability of the DFIG and infinite bus is compared with the method of eigenvalue analysis. The results show that feasible parameters which can maintain small-signal stability of grid are different in the two zones,and small-signal stability analysis on grid connection of DFIG considering wind speed partition can accurately assess the stability characteristics of the system.

关 键 词：风速分区 双馈风机并网 小干扰稳定性 最大功率跟踪区 恒转速区 

分 类 号：TM614[电气工程—电力系统及自动化]