Title :
Optimized design of a back-to-back NPC converter to be used as interface for renewable energies
Author :
Bueno, Emilio J. ; Cobreces, Santiago ; Rodriguez, Francisco J. ; Hernandez, Álvaro ; Espinosa, Felipe ; Mateos, Raul ; García, Juan C. ; López, Felix
Author_Institution :
Dept. of Electron., Alcala Univ., Alcala de Henares, Spain
Abstract :
As the number of wind power with power electronics interfaces in the grid increases, it becomes unacceptable to disconnect the generating units every time a disturbance occurs, as was a common practice in the past. Keeping the converter online during unbalanced voltage and guaranteeing the actual standards of the converter connected to the grid becomes a very critical issue. From these goals, the design of a robust back-to-back NPC (three levels) converter of 100 KVA is researched in this work. The converter is divided into two main parts: the power electronics system and the control electronics system. In both designs, some important contributions are shown. Concerning the first part, the paper presents primarily the converter limitations to compensate unbalanced dips, the grid filter design and the DC-bus capacitor design. Concerning the control electronics system, the chosen electronic structure and the tasks distribution between the chosen processors are shown.
Keywords :
power convertors; renewable energy sources; 100 kVA; DC-bus capacitor design; back-back NPC converter; control electronics system; grid filter design; optimization; power electronics interface; renewable energy; unbalanced dips compensation; unbalanced voltage; wind power; Control systems; Design optimization; Filters; Mesh generation; Power electronics; Power generation; Robustness; Voltage; Wind energy; Wind energy generation;
Conference_Titel :
Industrial Electronics Society, 2005. IECON 2005. 31st Annual Conference of IEEE
Print_ISBN :
0-7803-9252-3
DOI :
10.1109/IECON.2005.1569306