515 KB0 KB201320252023Cvetković, NenadJovanović, DejanStojanović, MiodragTasić, DraganVučković, Draganletnik:16številka:iss. 3str. 45-52ISSN:1855-5748COBISSID_HOST:186991619URN:URN:NBN:SI:doc-45NPEYTMenFakulteta za energetikoJET on-lineJournal of energy technologyestimation methodgrounding systemhemispherical electrodemetoda ocenjevanjanehomogena tlanon-homogeneous soilodpornostozemljitveni sistempolkroglasta elektrodaresistanceAn approximate model for determining the resistance of a hemispherical ground electrode placed at the top of a nonhomogeneous truncated cone| Približni model za določanje upora polokrogle ozemljene elektrode, nameščene na vrh nehomogenega prisekanega stožca|The procedure for analysis of a hemispherical ground electrode placed at the top of a hill is presented in the paper. The mountain is modelled as a truncated cone of finite height consisting of two homogeneous areas, each having different electrical characteristics. The applied approach is a combination of several recently proposed procedures. It includes the application of the Estimation method and the use of an approximate expression in closed form. The obtained results are validated and compared with those obtained using the COMSOL program packageV prispevku je predstavljen postopek analize polkrogle ozemljitvene elektrode, nameščene na vrhu hriba. Gora je modelirana kot prisekan stožec končne višine, sestavljen iz dveh homogenih območij, od katerih ima vsako različne električne značilnosti. Uporabljeni pristop je kombinacija več nedavno predlaganih postopkov. Vključuje uporabo metode ocenjevanja in uporabo približnega izraza v zaprti obliki. Dobljene rezultate smo validirali in primerjali z rezultati, pridobljenimi s programskim paketom COMSOLTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Mariboru, Fakulteta za energetiko