Vestnik of Samara State Technical University. Technical Sciences SeriesVestnik of Samara State Technical University. Technical Sciences Series1991-85422712-8938Samara State Technical University10573710.14498/tech.2022.1.7Research ArticleAccounting for wire saggingоn span of 220 kV OHL whendetermining current, induced in ground wire by phase current magnetic fieldsKrotkovEvgenij A.<p>PhD (Tech.), Associate Professor</p>krotkov.e.a@gmail.comBezmenovaNadezhda V.<p>PhD (Tech.), Associate Professor</p>saidova_nadezhda@mail.ruShchobakAleksandr A.<p>Postgraduate Student</p>shonSamara@gmail.comSamara State Technical University160620223011061170104202226042022Copyright © 2022, Samara State Technical University2022<p>Overhead ground-wire cable (GW) is more prone to ice formation compared to 220 kV overhead lines. Ice-melting methods for GW using special power source have certain engineering constraints and required is connection of overhead line. Preventive heating of GW to above-zero temperature is an equivalent method to ice-melting. Preventive heating shall be provided by induction from electromagnetic field (EMF) of 220 kV overhead lines while in service. Induction methods of 220 kV OHL GW heating have been summarized and briefly described. Mathematical models of GW inductive heating do not consider the influence of wire and GW saggingon EMF parameters and equivalent circuit ground wire-earth. Therefore, sufficient mathematical model is required to use induction method of GW heating at 220 kV OHL segment. We propose induction heating for GW of double-circuit 220 kV OHL inclosed circuit ground wire-additional conductor top reventice formation. Mathematical model have been developed to calculate current, induced in circuit ground wire-additional conductor by magnetic fields of 220 kV OHL current while in service. Influence of wire and GW saggingon EMF parameters and equivalent circuit ground wire-additional conductor has been estimated. Due to mathematical model we could estimate induced current to prevent ice formation on GW of double-circuit 220 kV OHL while in service. Closed circuit ground wire-additional conductor is recommended for practical use, with capacitor loop included into circuit, its capacitance to be determined based on voltage resonance conditions.</p>overhead linewire saggingground wireglaze-ice and rime depositionelectromagnetic fieldinductive resistance of closed circuitinduced currentpreventive heatingвоздушная линия электропередачипровис проводагрозозащитный тросгололедно-изморозевые отложенияэлектромагнитное полеиндуктивное сопротивление замкнутого контуранаведенный токпрофилактический подогрев[Andrievskij V.N. Ekspluataciya vozdushnyh linij elektroperedachi. M.: Energiya, 1976. 616 pp.][Levchenko I.I., Zasypkin A.S., Alliluev A.A., Sacuk E.I. Diagnostika, rekonstrukciya iekspluataciya vozdushnyh linij elektroperedachi v gololednyh rajonah. Novocherkassk: YURGTU, 2006. 494 pp.][Masoud Farzaneh. Atmospheric Icing of Power Networks // Springer Science Business Media B.V. 2008. 388 p.][Shovkoplyas S.S. Ice melting on a grounded lightning protection cable by induced current from superimposed reactive current in phase conductors // Izv. vuzov. Elektromekhanika. Specvypusk «Diagnostika energooborudovaniya». 2008. P. 23–24.][Shovkoplyas S.S. Ice melting on ground wires by induced high frequency current // Izv. vuzov. Elektromekhanika. Specvypusk «Elektrosnabzhenie». 2010. P. 17–18.][Balyberdin L.L., Galanov V.I., Krajchik YU.S., Krasnova B.P., Lozinova N.G., Mazurov M.I. Induction melting of ice on lightning protection cables of overhead power lines // Elektricheskie stancii. 2002. No 1. P. 31–37.][Shovkoplyas S.S. A method for preventing icing on lightning protection cables of an overhead power transmission line of ultra-high voltage by induced currents without taking it out of operation // Energetik. 2018. No 8. P. 13–20.][Zasypkin A.S., Zasypkin A.S. (jr.). Preventive heating of lightning protection cables of overhead lines by induced current // Izv. vuzov. Elektromekhanika. 2018. Vol. 61, no 2. P. 99–106.][Carson J.R. Wave propagation in over head wires withg round return // The Bell System Technical Journal, 1926. Vol. 5, No. 4. P. 539–554.][Hayasi S. Volny v liniyah elektroperedachi. M.: Gosenergoizdat, 1960, 343 pp.][STO 56947007-29.240.01.189-2014. Metodicheskie ukazaniya po primeneniyu al'bomov kart klimaticheskogo rajonirovaniya territorii po subektam RF. OAO «NTC FSK EES». Prikaz OAO «FSK EES» ot 03.10.2014. No 444. 95 pp.][STO 56947007-29.240.55.255-2018. Stal'nye reshetchatye opory novoj unifikacii VL 220 kV. Ukazaniya po primeneniyu opornovoj unifikacii pri proektirovanii VL 220 kV. Filial AO «NTC FSK EES» – SibNIIE. 2018. 323 pp.][Dmitriev M.V., Rodchihin S.V. Lightning protection cables VL 35-750 kV. Choice of grounding locations // Novosti Elektrotekhniki. 2017. No 2(104). P. 2–5.][Misrihanov M.Sh., Rubcova N.B., Tokarskij A.Yu. Obespechenie elektromagnitnoj bezopasnosti elektrosetevyh obektov. M., Vologda: Infra-Inzheneriya, 2019. 508 pp.][Merkin D.R. Vvedenie v mekhaniku gibkoj niti. M.: Nauka, 1980. 240 pp.][Boshnyakovich A.D. Raschet provodov podstanciji bolshih perekhodov LEP. L.: Energiya, 1975. 248 pp.][Korn G., Korn T. Spravochnik po matematike (dlya nauchnyh rabotnikov I inzhenerov). M.: Nauka, 1974. 832 pp.][Savel'ev I.V. Kurs obshchej fiziki . Ucheb. Posobie dlya studentov vtuzov v 3-h t. 2-e izd., pererab. Vol 2. M.: Nauka, 1982. 273 pp.][Krasnitskij Yu.A. Catenary magnetic field at low frequencies // Transport and Telecommunication. 2003. Vol. 4, no 1. P. 9–15.][COMSOL Multiphysics – Platform for creation of computational models and applications. https://www.comsol.ru (accessedJanuar11, 2022).][Demirchyan K.S., Nejman L.R., Korovkin N.V., Chechurin V.L. Teoreticheskie osnovy elektrotekhniki. Vol. 3. Teoriya elektromagnitnogo polya. Sankt-Peterburg: Piter, 2003. 377 pp.][Cejtlin L.A. Induktivnosti provodov i konturov. L.: Gosenergoizdat. 1950. 229 pp.][Cicikyan G.N., Baranov Yu.D. Comparative analysis of expressions for calculating the inductances of rectangular wires and circuits // Elektrichestvo. 2018. No 2. P. 59–63.]