A Model for Calculating Induced Voltage on the Antenna Unit of a Mobile Boom Crane in the Electromagnetic Field of Overhead Transmission Lines

Due to the high accident rate in mobile boom crane operation near overhead transmission lines, the issue of improving the accuracy of crane safety devices in the dangerous vicinity of the transmission line wires is urgent. The paper describes a theoretical model developed for calculating the induced EMF (induced voltage) on the antenna unit of the safety device. The selection of the electric field as the most stable factor for the detection of transmission lines is substantiated. A number of assumptions are substantiated in the theoretical model of calculation of induced EMF for practical application in the design and construction of antenna devices. On the basis of Maxwell’s equations, the induced voltage is calculated for transmission lines of various configurations (single-, double- and multi-circuit) and various nominal voltages, taking into account the phase sequence. Environmental factors that affect the accuracy of the design model and must be taken into account when designing safety devices are examined. The proposed design model makes it possible to increase the protection of cranes from electric shock.

References

[1] Federal’nye normy i pravila v oblasti promyshlennoi bezopasnosti «Pravila bezopasnosti opasnykh proizvodstvennykh ob"ektov, na kotorykh ispol’zuiutsia pod"emnye sooruzheniia». Utverzhdeny prikazom Federal’noi sluzhby po ekologicheskomu, tekhnologicheskomu i atomnomu nadzoru ot 12 noiabria 2013 g. № 533 [Federal norms and rules in the field of industrial safety «Safety rules for hazardous production facilities which are used elevating constructions». Approved by the order of the Federal service for environmental, technological and nuclear supervision on 12 November 2013 no. 533]. Available at: http://legalacts.ru/doc/prikaz-rostekhnadzora-ot-12112013-n-533-ob/ (accessed 10 October 2017).

[2] Sredstva zashchity v mashinostroenii. Raschet i proektirovanie. Spravochnik [Protection in mechanical engineering. Calculation and design. Reference]. Ed. Belov S.V. Moscow, Mashinostroenie publ., 1989. 368 p.

[3] A Performance Evaluation of Two Power Line Proximity Warning devices. Available at: https://www.cdc.gov/niosh/mining/userfiles/works/pdfs/2009-110.pdf (accessed 01 September 2017).

[4] Voronezhtsev A.V., Makarov A.B., Kazakov E.A., Mamonov A.I., Chubarov V.I. Ustroistvo dlia obnaruzheniia elektricheskogo polia linii elektroperedachi [A device for detecting the electric field of a transmission line]. Patent RF no. 2319159 C1, 2006. 9 p.

[5] Sigalarm products reduce unnecessary accidents. Available at: https://sigalarminc.com/products/ (accessed 10 October 2017).

[6] Semrad Pty Ltd. Available at: http://www.semrad.com.au/products/safety-systems/wireless-high-voltage-proximity-alarm (accessed 10 September 2017).

[7] Timin Iu.F., Ognev V.B., Konenkov A.M., Chernykh A.I., Vladimirov Iu.G., Gerasimov V.P. Ustroistvo dlia obnaruzheniia i signalizatsii pri priblizhenii k LEP [Device to detect and alarm when approaching power lines]. Patent RF no. 2097895, 1997.

[8] Andres D., Stevick G. Overhead Powerline Early Warning Devices for Cranes, Lifts and other Aerial Mobile Equipment. Available at: http://www.bearinc.com/papers/PowerLineDetection.pdf (accessed 1 September 2017).

[9] Nosko A.L. Otsenka effektivnosti tormozov pri obespechenii bezopasnoi raboty gruzopod"emnykh mashin [Evaluation of the effectiveness of the brakes while ensuring the safe operation of hoisting machines]. Moscow, Universitetskaia kniga publ., 2017. 136 p.

[10] Zhelamskii M.V. Elektromagnitnoe pozitsionirovanie podvizhnykh ob"ektov [Electromagnetic positioning of mobile objects]. Moscow, FIZMATLIT publ., 2013. 320 p.

[11] Pravila ustroistva elektroustanovok. Utverzhdeny Prikazom Minenergo Rossii ot 8 iiulia 2002 g. no. 204 [Rules of electrical devices. Approved by Order of the Ministry of energy dated July 8, 2002, no. 204].

[12] Gurvich I.S. Zashchita EVM ot vneshnikh pomekh [Protection of computers against external interference]. Moscow, Energoatomizdat publ., 1984. 224 p.

[13] Parakhin A.M. Zashchita ot priblizheniia vysokogabaritnykh mekhanizmov k vozdushnym liniiam elektroperedachi s avtomaticheskim vyborom bezopasnogo rasstoianiia. Dis. kand. tekhn. nauk [Protection from approaching vysokosaharistyh mechanisms to aerial power lines with automatic selection of a safe distance. Cand. tehn. sci. diss.]. Moscow, MEI publ., 1984. 291 p.

[14] Neiman L.R., Demirchan K.S. Teoreticheskie osnovy elektrotekhniki [Theoretical foundations of electrical engineering]. Vol. 1, Leningrad, Energiia. Leningr. otd. publ., 1967. 411 p.

[15] Saranin V.A. O vzaimodeistvii dvukh elektricheski zariazhennykh provodiashchikh sharov [On the interaction of two electrically charged conducting balls]. Uspekhi fizicheskikh nauk [Advances in Physical Sciences]. 1999, vol. 42, pp. 385–390, doi: 10.1070/PU1999v042n04ABEH000584.