230 American Scientific Research Journal for Engineering, Technology, and Sciences (ASRJETS) ISSN (Print) 2313-4410, ISSN (Online) 2313-4402 © Global Society of Scientific Research and Researchers http://asrjetsjournal.org/ Wind Energy Conversion System for Harmonics and Inter-harmonic Analysis Emmanuel Hernández a* , Miguel Ángel Hernández b , Hugo Jorge Cortina Marrero c , Reynaldo Iracheta d a,b Universidad del Istmo, Calle Sta. Cruz s/n Av. Universidad, Oaxaca. C.P. 70760, México a Email: emanuel.mayoral7@gmail.com; b Email: mahluni2000@yahoo.com.mx c Email: hcmlhd@yahoo.com; d Email: riracheta@conacyt.mx Abstract In this research, a harmonic and inter-harmonic analysis is presented for two types of wind energy conversion systems (WECS): a squirrel cage induction machine and doubly-fed induction machine because of the incorporation of power electronics in these systems, such as soft-starter and power converter that distort the voltage and current waveform. The analysis is based on the well-known steady-state induction machine model, additionally; a dynamic-state model is developed to compare the steady-state model validating the results of the simulations obtaining a harmonic and inter-harmonic model, in steady-state, clear and precise of the wind energy conversion system. Keywords: Doubly-fed induction machine; harmonic and inter-harmonic analysis; wind energy conversion system. 1. Introduction The increase in power generated in wind farms makes it necessary to study the power quality injected into the electrical network, transmission systems and electrical machinery. This power generated can present problems mainly due to three factors: 1. Introduction of voltage fluctuations and the presence of harmonics and inter-harmonic in the electrical network due to natural oscillations in wind velocity, and those caused by the presence of the mast. ------------------------------------------------------------------------ * Corresponding author.