Abstract
In this paper, the operation of the Double Fed Induction Generator (DFIG) in the range from synchronous speed down to sub-synchronous speeds is analyzed using the power-flow approach. The objective of this analysis is to determine a ceiling for the rating of the converter interfacing the rotor of the wind driven double fed induction generator (DFIG) to the grid. Sizing the converter is an important issue in determining the economic viability of using the DFIM as a generator at synchronous and sub-synchronous speeds in wind energy conversion systems. The size of the converter is proved to be less than 10% of the rated power of the DFIG, which is 40% to 67% lower than that estimated in previous publications.
Highlights
The world community is very much concerned about “climate change” and the global warming, which is mainly attributed to the increase of greenhouse gases (GHG) in the atmosphere
The size of the converter is proved to be less than 10% of the rated power of the Double Fed Induction Generator (DFIG), which is 40% to 67% lower than that estimated in previous publications
Wind energy utilization has, beside the many merits, two main drawbacks, namely; the intermittent unpredictable nature of the wind resource, and the relatively large investment cost of the components of the wind energy conversion system (WECS).the nature of the wind could not be changed, but WECS could be connected to large power grids, and operate as fuel savers during the availability of reasonable wind speeds, while the fossil fuel fired power plants connected to the grid act as backup during the low wind speeds
Summary
The world community is very much concerned about “climate change” and the global warming, which is mainly attributed to the increase of greenhouse gases (GHG) in the atmosphere. Wind energy utilization has, beside the many merits, two main drawbacks, namely; the intermittent unpredictable nature of the wind resource, and the relatively large investment cost of the components of the wind energy conversion system (WECS).the nature of the wind could not be changed, but WECS could be connected to large power grids, and operate as fuel savers during the availability of reasonable wind speeds, while the fossil fuel fired power plants connected to the grid act as backup during the low wind speeds. The behavior of the DFIG at synchronous speed is investigated
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