Analysis of grid-connected voltage stability of FSCWT based on bifurcation theory

作     者：HE Ai-huan ZHANG Rui-ping DONG Hai-ying 何爱欢;张蕊萍;董海鹰

作者机构：School of Automation and Electrical EngineeringLanzhou Jiaotong UniversityLanzhou 730070China School of Energy and Power EngineeringLanzhou Jiaotong UniversityWuwei 733000China 

出 版 物：《Journal of Measurement Science and Instrumentation》 (测试科学与仪器（英文版）)

年 卷 期：2018年第9卷第1期

页      面：16-24页

核心收录：

学科分类：080802[工学-电力系统及其自动化] 0808[工学-电气工程] 08[工学] 

基　　金：National Natural Science Foundation of China(No.61663019) 

主　　题：bifurcation theory power system front-end speed controlled wind turbines(FSCWT) voltage stability 

摘      要：This paper studies on the change mechanisms of the voltage stability caused by the grid connection of front-end speed-controlled wind turbines(FSCWT)integrating into power *** of all,the differential algebraic equations describing the dynamic characteristics of wind turbines are ***,under the guidance of IEEE3 node system model,the influence of the angular velocity of wind turbines,the reactive power and the active power at load bus on the voltage stability of grid-connection has been analyzed by using bifurcation ***,the method of linear-state feedback control has been applied to the original system in accordance with the bifurcation phenomenon of grid-connected voltage caused by the increase in the active power at load *** shows that voltage at the grid-connected point would be changed with the fluctuation of turbines angular *** increasing its reactive power can enhance voltage at the grid-connected point;problem of bifurcation at the grid-connected point can be delayed when increasing the gain k s of feedback controller within a certain range.