A simulation study of wind energy conversion systems using Matlab

Wind Energy is a renewable energy, which is produced by the uneven heating up of the earth surface by the sun. During the daytime, air on the land surface gets heated up faster than air on the water [2]. The heated air expands and raises to the atmosphere the cold air over the water surface tries to replace it due to the low pressure on the land as a result wind is produced. At nighttime winds are reversed as the air on land gets cooled faster than the air on water and the same principle is applied for the atmospheric winds.; Due to this variable nature of the wind, wind energy conversion systems (WECS) differ from that of a conventional power system. In a conventional power plant the output of a system can be controlled, where as in a WECS the output of the system fluctuates with wind. This variable nature of the wind makes it difficult for the analysis, design and manufacturing of WECS. In this thesis for the better analysis of the WECS, we are using dynamic steady-state simulation of the WECS using induction and double-fed induction machines [5]. The dynamic steady-state simulations of these machines are done in mat lab for a wind turbine, wind farm and an incorporated WECS grid system. In the case of the Double-fed induction machines, which are widely used for the varying wind speeds. The simulations are done in steady state to investigate a variety of DFIG characteristics. Also to improve the power factor of the WECS various compensations like parallel, series, parallel-series compensations are introduced.