Artículo de revista
Control of a wind generation system based on a Brushless Doubly-Fed Induction Generator fed by a matrix converter
Date
2013Registration in:
Electric Power Systems Research 103 (2013) 49– 60
dx.doi.org/10.1016/j.epsr.2013.04.006
Author
Cárdenas Dobson, Jesús
Muñoz, Andrés
Sureda, Alvaro
Peña, Rubén
Wheeler, Patrick
Clare, Jon
Institutions
Abstract
The Doubly-Fed Induction Generator (DFIG) is one of the most widely used generators for wind energy
applications with more than 50% of installed Wind Energy Conversion Systems (WECS) using this variable
speed technology. However, the conventional DFIG requires brushes and copper slip-rings to connect a
power converter to the rotor windings. The use of brushes decreases the WECS’ robustness and extra
maintenance is required to periodically inspect/replace these elements. In this work a new topology
for a Brushless Doubly-Fed Induction Generator (BDFIG) is presented. As an alternative to conventional
Voltage Source Inverters (VSI) a matrix converter is used to regulate the current supplied to the stator of
the doubly-fed machine, supplying the excitation energy to the WECS. The proposed generation system
is mathematically analysed in this paper and the design of the control loops is discussed. Because the
power spectrum density of the wind speed is dominated by low frequency components, in this work
some simplifications of the transfer functions of the system are proposed. Experimental results obtained
from a 3 kW prototype of a cascaded DFIG, are presented and fully discussed.