Load frequency control scheme design considering flexible disturbances

作     者：Chen, Chunyu Zhang, Kaifeng Ding, Zhetong Dong, Wenjie Li, Xiaoqiang Liang, Rui 

作者机构：China Univ Min & Technol Sch Elect & Power Engn Xuzhou 221116 Jiangsu Peoples R China Jiangsu Prov Lab Elect & Automat Engn Coal Min Xuzhou Jiangsu Peoples R China Southeast Univ Sch Automat Minist Educ Key Lab Measurement & Control Complex Syst Engn Nanjing 210096 Peoples R China Univ Texas Rio Grande Valley Dept Elect Engn Edinburg TX 78539 USA 

出 版 物：《IET RENEWABLE POWER GENERATION》 (IET. Renew. Power Gener.)

年 卷 期：2020年第14卷第19期

页      面：4142-4149页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0808[工学-电气工程] 08[工学] 

基　　金：National Natural Science Foundation of China [51977033  51807196] 

主　　题：frequency control variable structure systems nonlinear control systems PI control renewable energy sources observers control system synthesis power system control load regulation power system interconnection power generation control good power quality frequency stability power systems large-scale integration highly flexible renewable energy sources solar energy RES-generated disturbances volatility short time scale highly time-varying disturbances flexible RES suppression disturbance estimation compensation active disturbance rejection scheme previous ADR-based LFC schemes sliding mode control scheme area control error power imbalance load frequency control scheme design flexible disturbances 

摘      要：Good power quality cannot be achieved without the frequency stability of power systems. Nevertheless, with the large-scale integration of highly flexible renewable energy sources (RESs) such as wind and solar energy, frequency stability is threatened by RES-generated disturbances due to their volatility and intermittency especially in the very short time scale. Therefore, a new frequency control scheme should be designed to attenuate these highly time-varying disturbances. In this study, load frequency control (LFC) considering flexible RES suppression is investigated. Inspired by the idea of disturbance estimation and compensation, a novel active disturbance rejection (ADR) scheme is proposed. Unlike previous ADR-based LFC schemes, the proposed one can significantly reduce estimation errors via a novel extended state observer. Then a sliding mode control scheme is used to force the area control error to slide along the equilibrium, thus significantly attenuating the power imbalance. Simulation results show the effectiveness of the proposed schemes.