电力建设2025，Vol.46Issue(2)：151-159,9.DOI:10.12204/j.issn.1000-7229.2025.02.013
基于线性自抗扰控制的统一潮流控制器次同步振荡抑制策略
UPFC Subsynchronous Oscillation Suppression Strategy Based on Linear Active Disturbance Rejection Control
摘要
Abstract
Large-scale doubly-fed wind farms connected through series-compensated transmission lines are prone to subsynchronous oscillations(SSO),which can cause wind turbines to disconnect from the grid,posing a serious threat to the safe and stable operation of the power system.This paper proposes a control method that utilizes a unified power flow controller(UPFC)with additional damping control to mitigate SSO.The approach involves the design of a decoupled linear active disturbance rejection controller(LADRC)that uses a linear state observer to estimate the subsynchronous disturbances in the system in real time.In addition,a delay-compensation mechanism was introduced to eliminate communication delays during signal transmission.Based on the improved LADRC,an additional damping controller for the UPFC was designed to enable the UPFC to exhibit positive damping characteristics in the system,thereby suppressing SSO and enhancing the robustness and resistance of the system to disturbances.Finally,a simulation model of a doubly-fed wind farm connected to the grid through a series-compensated transmission line was developed using the MATLAB/Simulink software.The simulation results demonstrate that the proposed method effectively mitigates SSO under various conditions,including different levels of series compensation,wind speeds,and numbers of connected wind turbines.This can serve as a reference for studying similar problems of long-distance grid connections in double-fed wind farms in China.关键词
双馈风电场/串补线路/次同步振荡(SSO)/线性自抗扰控制(LADRC)Key words
double-fed wind farm/series-compensated transmission lines/sub-synchronous oscillation(SSO)/linear active disturbance rejection control(LADRC)分类
信息技术与安全科学引用本文复制引用
刘一琦,黄旭,王天昊,郑钧元..基于线性自抗扰控制的统一潮流控制器次同步振荡抑制策略[J].电力建设,2025,46(2):151-159,9.基金项目
This work is supported by the National Natural Science Foundation of China(No.52477179)and the Fundamental Research Funds for the Central Universities(No.2572023CT15-02). 国家自然科学基金面上项目(52477179) （No.52477179）
中央高校基本科研基金(2572023CT15-02) （2572023CT15-02）
