发电技术2024，Vol.45Issue(6)：1135-1145,11.DOI:10.12096/j.2096-4528.pgt.23076
基于改进线性自抗扰控制器的直驱风机次同步振荡抑制及阻抗稳定性分析
Subsynchronous Oscillation Suppression of Direct-Drive Wind Turbines Based on Improved Linear Active Disturbance Rejection Control and Analysis of Impedance Stability
摘要
Abstract
[Objectives]In response to the impact of the bandwidth of the current inner loop PI controller on the stability of the grid connected system of direct drive wind turbines under the background of weak electricity network,which leads to the induction of sub synchronous oscillation(SSO)phenomenon,a linear active disturbance rejection control(LADRC)was proposed to replace the current inner loop PI controller with an improved linear state error feedback control law(LSEF)to suppress SSO.[Methods]Firstly,the LSEF of the LADRC controller was improved,and the tracking errors and anti-interference capabilities were studied.Moreover,an impedance model for the system considering frequency coupling effects was developed,and the Nyquist criterion was employed to assess the impact of line impedance values on the stability of the grid-connected converter system.Finally,the analysis and validation were performed using PSCAD/EMTDC simulation software.[Results]Compared with traditional LADRC,the improved LADRC can reduce the DC side voltage fluctuation range by 85%and the active power fluctuation range by 89%.[Conclusions]Compared with traditional LADRC controllers,improved LADRC controllers can better reduce the range of power fluctuations,DC side voltage fluctuations,and tracking errors.关键词
风电/次同步振荡(SSO)/线性自抗扰控制器(LADRC)/阻抗模型/直驱式风机/弱电网/并网Key words
wind power/subsynchronous oscillation(SSO)/linear active disturbance rejection control(LADRC)/impedance model/direct-drive wind turbine/weak grid/connection to grid分类
能源科技引用本文复制引用
任蓓蕾,郭昆丽,蔡维正,李博浩,朱婷华,李玲陶..基于改进线性自抗扰控制器的直驱风机次同步振荡抑制及阻抗稳定性分析[J].发电技术,2024,45(6):1135-1145,11.基金项目
陕西省自然科学基础研究计划项目(2023-JC-QN-0391).Project Supported by Natural Science Basic Research Program of Shaanxi Province(2023-JC-QN-0391). （2023-JC-QN-0391）
