Title :
Improving LVRT capability of dounly fed induction generator utilizing super-capacitor with rotor crowbar protection
Author :
Limeng Wang ; Shiqing Wang ; Guoqing Li
Author_Institution :
Sch. of Electr. & Electron. Eng., North China Electr. Power Univ., Beijing, China
Abstract :
In this paper, a solution is described that makes it possible for doubly fed induction generator (DFIG) to stay connected to the grid during grid faults. In order to protect the converter and improve low voltage ride through (LVRT) capability of DFIG during grid faults, super-capacitor (SC) with rotor crowbar protection is utilized. The controller model based on SC with crowbar and the corresponding control strategy are proposed. The simulation study of ten DFIGs connected to a infinite grid is carried out using DIgSILENT simulator. The simulation results are presented to validate the performance of the proposed system.
Keywords :
asynchronous generators; power convertors; power grids; power system faults; rotors; supercapacitors; DFIG; DIgSILENT simulator; LVRT capability improvement; SC; converter protection; doubly fed induction generator; grid fault; low voltage ride through capability; rotor crowbar protection; supercapacitor; doubly fed induction generator (DFIG); low voltage ride through (LVRT); rotor crowbar protection; super-capacitor (SC); voltage source converter (VSC);
Conference_Titel :
Information Science and Control Engineering 2012 (ICISCE 2012), IET International Conference on
Conference_Location :
Shenzhen
Electronic_ISBN :
978-1-84919-641-3
DOI :
10.1049/cp.2012.2361
