Abstract—Wind power is among the most actively developing distributed generation (DG) technology. Majority of the wind power based DG technologies employ wind turbine induction generators (WTIG) instead of synchronous generators, for the technical advantages like: reduced size, increased robustness, lower cost, and increased electromechanical damping. However, dynamic changes of wind speed make the amount of active/reactive power injected/drawn to a WTIG embedded distribution network highly variable. This paper analyzes the effect of wind speed changes on the active and reactive power penetration to the wind energy embedded distribution network. Four types of wind speed changes namely; constant, linear change, gust change and random change of wind speed are considered in the analysis. The study is carried out by three-phase, non-linear, dynamic simulation of distribution system component models. Results obtained from the investigation are presented and discussed. Keywords—Wind turbine induction generator, distribution network, active and reactive power, wind speed. NOMENCLATURE Wind Turbine: P m Mechanical output power of the turbine (W). C P Performance coefficient of the turbine. ρ Air density (kg/m 3 ). A Turbine swept area (m 2 ). V wind Wind speed (m/s). λ Tip speed ratio of the rotor blade tip speed to wind speed. β Blade pitch angle (deg). P m_pu Power in pu of nominal power for particular values of ρ and A. Sidhartha Panda is a research scholar in the Department of Electrical Engineering, Indian Institute of Technology, Roorkee, Uttaranchal, 247667, India. (e-mail: panda_sidhartha@rediffmail.com). N.P.Padhy is Associate professor in the Department of Electrical Engineering, IIT, Roorkee India.(e-mail:, nppeefee@iitr.ernet.in) k p Power gain. C P_pu Performance coefficient in pu of the maximum value of C P . Induction Machine: R s , L ls Stator resistance and leakage inductance. R' r , L' lr Rotor resistance and leakage inductance. L m Magnetizing inductance. L s , L' r Total stator and rotor inductances. V qs , i qs q-axis stator voltage and current. V' qr , i' qr q-axis rotor voltage and current. V ds , i ds d-axis stator voltage and current. V' dr , i' dr d-axis rotor voltage and current. ϕ qs , ϕ ds Stator q and d-axis fluxes. ϕ’ qr , ϕ’ dr Rotor q and d-axis fluxes. ω m Angular velocity of the rotor. θ m Rotor angular position. P Number of pole pairs. ω r Electrical angular velocity. θ r Electrical rotor angular position. T e Electromagnetic torque. J Combined rotor and load inertia coefficient. H Combined rotor and load inertia constant. F Combined rotor and load viscous friction coefficient. I. INTRODUCTION HE rapid development of distributed generation (DG) technology is gradually reshaping the conventional power systems in a number of countries. Wind power is among the most actively developing distributed generation. Grid- connected wind capacity is undergoing the fastest rate of growth of any form of electricity generation, achieving global annual growth rates on the order of 20 - 30% [1]. The Investigating the Impact of Wind Speed on Active and Reactive Power Penetration to the Distribution Network Sidhartha Panda, N.P.Padhy T World Academy of Science, Engineering and Technology International Journal of Electrical and Computer Engineering Vol:2, No:10, 2008 2268 International Scholarly and Scientific Research & Innovation 2(10) 2008 ISNI:0000000091950263 Open Science Index, Electrical and Computer Engineering Vol:2, No:10, 2008 publications.waset.org/2760/pdf