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DYNA

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Abstract

ROMERO-QUETE, Andrés Arturo; SUVIRE, Gastón Orlando; ZINI, Humberto Cassiano  and  RATTA, Giuseppe. Time-varying harmonic analysis of electric power systems with wind farms, by employing the possibility theory. Dyna rev.fac.nac.minas [online]. 2015, vol.82, n.192, pp.185-194. ISSN 0012-7353.  http://dx.doi.org/10.15446/dyna.v82n192.48617.

This paper focuses on the analysis of the connection of wind farms to the electric power system and their impact on the harmonic load-flow. A possibilistic harmonic load-flow methodology, previously developed by the authors, allows for uncertainties related to linear and nonlinear load variations to be modeled. Moreover, it is well known that some types of wind turbines also produce harmonics, in fact, time-varying harmonics. The purpose of this paper is to present an improvement of the former method, in order to include the uncertainties due to the wind speed variations as an input related with power generated by the turbines. Simulations to test the proposal are performed in the IEEE 14-bus standard test system for harmonic analysis, connecting to the network a wind farm composed by ten Full Power Converter (FPC) type wind turbines. Results obtained show that uncertainty in the wind speed has a considerable effect on the uncertainties associated with the computed harmonic voltage magnitudes.

Keywords : full power converter; harmonic distortion; possibility distribution; power system; uncertainty; wind turbine.

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