Modeling and Simulation of Mechanical and Electrical Transient of Variable-Speed Pumped Storage Units. Issue 1 (February 2021)

• Record Type: Journal Article
• Authors: Xie, Huan; Liu, Lili; Li, Shanying; Liang, Hao; Tan, Qibang; Song, Wenqian; Li, Mengdi
• Is Part Of: IOP conference series. Volume 634:Issue 1(2021)
• Publication Date: 2021-02
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/634/1/012053
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: In order to study the operation characteristics of large capacity variable-speed pumped storage units connected to the system, the electromechanical transient model is established. Firstly, based on the basic equations of the doubly-fed machine, the generator model represented by an equivalent voltage source is built. Secondly, on the premise of coupling term cancellation, the frequency conversion controller, frequency converter and generator connection module are normalized. Then, the generator model and variable frequency controller model are integrated to form the electromechanical transient model of the unit, which is not only the fitting of external characteristics but also retains the dynamic process of the motor flux linkage and the dynamic characteristics of the controller's inner loop. Finally, the electromechanical transient model is simulated on the RTDS platform. The simulation results show that the model is correct and effective, which is of great significance to the study of transient problems of large-capacity doubly-fed units connected to the grid.