Electric supply of underground consumers of deep energy-intensive mines

The increase in the capacity of cleaning and construction vehicles for high-capacity and energy-intensive mines calls for an increase in the supply voltage of cleaning and tunneling combines, as well as transport systems: from a voltage of 660 V switched to 1140 V, and now to 3300 V. This allows improving technical and economic indicators for clearing and access areas, as well as improving the reliability of local Power Supply Systems (PSS). However, this trend prevents the supply of underground electric networks with a voltage of 6 kV, in connection with which the problem arises of increasing the voltage of supply networks. To date, it has become possible to apply the 10 kV voltage to the operation, which is most acceptable for the use of electrical equipment for electrical networks and protection devices. Leading educational, research and design organizations were engaged in research on this issue. An analysis of the results of the research showed that switching to 10 kV voltage is justified and timely. At the same time, 35 kV voltage is not removed from the agenda, which is technically feasible and economically justified, but there are problems with the safety of its operation in underground workings, which requires appropriate refinement. This level of voltage will improve the quality of electricity. Conclusions: 1. Application of 35 kV voltage in the underground power supply system of coal and ore mines is advisable at a depth of more than 1000 m with a maximum load of at least 1000 kVA at the level of the stem cables. 2. Application of 35 kV voltage in underground electrical networks will allow to significantly improve the quality indicators of voltage, reliability, and economy of the system due to the current unloading of the most important element of SES, such as stem cables. 3. Analysis of the main parameters and characteristics of electrical mine electrical equipment gives reason to believe that it allows implementing a trend of 35 kV deep input to deep horizons of mines (mines) and placement of 35/6 kV substations on working horizons.

1. Aspekti energoefektivnostі zalіzorudnih pіdpriєmstv [Aspects of energy efficiency of iron ore enterprises]. Monograph. Guzov E.S., et. al. Krivoy Rog, 2017, 240 p. [in Ukrainian].

2. Barkan Ja.D. Avtomatizacija regulirovanija naprjazhenija v raspredelitel'nyh setjah [Automation of voltage regulation in distribution networks]. Ed. by N.A. Melnikov. Moscow, Energia, 1971, 232 p.

3. Belyh B.P. Jelektricheskie nagruzki i jelektropotreblenie na gornorudnyh predprijatijah [Electrical loads and power consumption in mining enterprises]. B.P. Belyh, I.S. Sverdel', V.K. Olejnikov. Moscow, Nedra, 1971, 247 p.

4. Beljak V.L., Plashhanskij L.A. Uvelichenie naprjazhenija uchastkovyh setej kak sposob povyshenija jeffektivnosti ispol'zovanija gornyh mashin v vysokoproizvoditel'nyh zabojah ugol'nyh shaht [Increase in the voltage of district networks as a way to increase the efficiency of using mining machines in high- productivity coal mine faces]. Mining Informational and Analytical Bulletin (scientific and technical journal), 2011, no. 9.

5. Grejsuh M.V. Jelektrosnabzhenie ugol'nyh i rudnyh shaht [Power supply of coal and ore mines]. M.V. Grejsuh, L.N. Kutovoj. Moscow, Nedra, 1965, 360 p.

6. Zarhi I.M. Vnutrennie perenaprjazhenija v setjah 6−35 kV [Internal overvoltages in 6-35 kV networks]. I.M. Zarhi, V.N. Meshkov, F.H Halilov, et. al. Publ. Nauka, Leningrad branch, 1986, 128 p.

7. Zastosuvannja naprugi 35 kV dlja sistem elektropostachannja pіdzemnih elektroprijmachіv glibokih energoєmnih shaht [Application of 35 kV voltage for power supply systems of underground electric appliances of deep energyintensive mines]. F.P. Shkrabets, O.V. Ostapchuk. Scientific bulletin of NMU, 2013, no. 1, pp. 83-90. [in Ukrainian]

8. Instrukcija po proektirovaniju jelektroustanovok ugol'nyh shaht, razrezov, obogatitel'nyh i briketnyh fabric [Instruction on the design of electrical installations of coal mines, sections, concentrating and briquette factories]. Moscow, Ministry of Fuel and Energy of the Russian Federation, 1993, 115 p.

9. Kolosjuk V.P. Tehnika bezopasnosti pri jekspluatacii rudnichnyh jelektroustanovok [Safety in the operation of mine electrical installations]. Moscow, Nedra, 1987, 407 p.

10. Kudrin B.I. Jelektrosnabzhenie promyshlennyh predprijatij [Electricity supply of industrial enterprises]. Textbook for high schools. Moscow, Publ. MSMU, 2007.

11. Makarov M.I. Nadezhnost' jelektrosnabzhenija zaboev ugol'nyh shaht [Reliability of power supply to the faces of coal mines]. M.I. Makarov, A.A. Bocharov. Kiev, Tehnіka, 1985, 184 p.

12. Markushevich N.S. Regulirovanie naprjazhenija i jekonomija jelektrojenergii [Voltage regulation and energy saving]. N.S. Markushevich. Moscow, Energoatomizdat, 1984, 104 p.

13. Minovskij, Ju.P. Jeffektivnost' jelektrosnabzhenija zaboev ugol'nyh shaht [Efficiency of power supply to the faces of coal mines] Ju.P. Minovskij. Moscow, Nedra, 1990, 158 p.

14. Murav'ev V.P. Nadezhnost' sistem jelektrosnabzhenija i jelektrooborudovanija podzemnyh razrabotok shaht [Reliability of power supply systems and electrical equipment for underground mine development] V.P. Murav'ev, G.I. Razgil'deev. Moscow, Nedra, 1970, 144 p.

15. Napravlenija sovershenstvovanija podzemnyh sistem jelektrosnabzhenija shaht [Directions for the improvement of underground power supply systems for mines]. Electronic resource. N.M. Basov, V.S. Dzjuban, M.I. Rymar, A.A. Macegora. Ugol' Ukrainy, 2013, no. 5, pp. 28-31.

16. Ostapchuk O.V. Tehnіchna realіzacіja metodu zahisnogo shuntuvannja v sistemі elektropostachannja glibokih shaht [Technical realization of the method of protective shunting in the power supply system of deep shafts]. O.V. Ostapchuk. Gіrnicha elektromehanіka ta avtomatika, Sci.-Tech. Collection, 2016, vol. 93, pp. 25-32. [in Ukrainian].

17. Pivnjak G. G. Perspektivy povyshenija nominal'nyh naprjazhenij jelektricheskoj seti v sisteme jelektrosnabzhenija ugol'nyh shaht [Prospects for increasing the nominal voltages of the electric grid in the coal mine power supply system]. G.G. Pivnjak, Ju.T. Razumnyj, A.V. Ruhlov. Jenergosberezhenie, 2008, no. 3, pp. 9-11.

18. Plashhanskij L.A. Osnovy jelektrosnabzhenija gornyh predprijatij [Bases of power supply of mining enterprises]. Textbook for high schools. L.A. Plashhanskij. 2-nd Ed., corrected, Moscow, Publ. MSMU, 2006, 499 p.

19. Plashhanskij L.A., Beljak V.L. Analiz tehnologicheskih shem s cel'ju racional'nogo jelektrosnabzhenija uchastkov shaht pri naprjazhenii 3 (3,3) kV [Analysis of technological schemes for the purpose of rational power supply to mine sites at a voltage of 3 (3.3) kV]. Gornoe oborudovanie i mehanika, 2008, no. 1.

20. Plashhanskij L.A., Beljak V.L. Tehniko-jekonomicheskoe obosnovanie urovnja nominal'nogo naprjazhenija jelektrodvigatelej vysokojenergovooruzhennyh ochistnyh kompleksov [Feasibility study of the rated voltage level of electric motors of high- energy treatment complexes]. Mining Informational and Analytical Bulletin (scientific and technical journal), 2009, no. 1.

21. Pobul' G.H. Povyshenie propusknoj sposobnosti raspredelitel'nyh setej vysokogo naprjazhenija s primeneniem prodol'no-emkostnoj kompensacii [Increase of throughput capacity of high voltage distribution networks using longitudinally capacitive compensation]. G.H. Pobul'. Moscow, Energia, 1977, 60 p.

22. Povyshenie jenergeticheskoj jeffektivnosti ugol'nyh shaht Ukrainy [Increase of energy efficiency of coal mines in Ukraine]. Electronic resource. B.A. Grjadushhij, G.N. Lisovoj, V.A. Korsun. Mining Informational and Analytical Bulletin (scientific and technical journal), 2007, no. 10, pp. 244-248.

23. Pokazateli kachestva jelektrojenergii v raspredelitel'nyh setjah shaht i vlijanie otklonenij naprjazhenija na tehniko-jekonomicheskie pokazateli jelektrosnabzhenija [Indicators of electricity quality in the distribution grids of mines and the effect of voltage deviations on technical and economic indicators of electricity supply]. Electronic resource. O.N. Sinchuk, I.I. Peresun'ko. Gіrnichij vіsnik, 2014, no. 97, pp. 152-157.

24. Prahovnik, A.V. Jenergosberegajushhie rezhimy jelektrosnabzhenija gornodobyvajushhih predprijatij [Energy-saving modes of power supply for mining enterprises]. A.V. Prahovnik, V.P. Rozen, V.V. Degtjarev. Moscow, Nedra, 1985, 232 p.

25. Razumnyj Ju.T. Povyshenie jeffektivnosti jelektrosnabzhenija ugol'nyh shaht [Increasing the efficiency of electricity supply of coal mines]. Ju.T. Razumnyj, F.P. Shkrabets. Kiev, Tehnika, 1984, 136 p.

26. Serov V.I. Metody i sredstva bor'by s zamykanijami na zemlju v vysokovol'tnyh sistemah gornyh predprijatij [Methods and means of combating earth faults in high- voltage systems of mining enterprises]. V.I. Serov, V.I. Shhuckij, B.M. Jagudaev. Moscow, Nauka, 1985, 136 p.

27. Sinchuk O.N. O probleme jelektrotravmatizma pri jekspluatacii jelektroustanovok v podzemnyh gornyh vyrabotkah zhelezorudnyh shaht [To the problem of electro-injury in the operation of electrical installations in underground mine workings of iron ore mines]. O.N. Sinchuk, A.A. Haritonov. Eastern-European Journal of Enterprise Technologies, 2014, no. 2/10(68), pp. 21-25.

28. Sinchuk I.O. Potencial jenergojefektivnosti i puti ego realizacii na proizvodstvah s podzemnym sposobom dobychi zhelezorudnogo syr'ja. [Potential of energy efficiency and ways of its implementation in industries with underground mining of iron ore raw materials]. Monograph. I.O. Sinchuk, et. al. Kremenchug, ed. PE Shcherbatykh A.V., 2015, 296 p.

29. Sirota I.M. Rezhimy nejtrali jelektricheskih setej [Neutral modes of electrical networks]. I.M. Sirota, S.I. Kislenko, A.M. Mihajlov. Kiev, Naukova dumka, 1985, 264 p.

30. Sovershenstvovanie metodov rascheta nagruzok sistem jelektrosnabzhenija rudnyh shaht [Improvement of methods for calculating loads of power supply systems for ore mines]. V.P. Rozen, O.N. Sinchuk, Je.S. Guzov, R.A. Parhomenko. Gornyi Zhurnal = Mining Journal, 2013, no. 12, pp. 87-90.

31. Sovershenstvovanie shem pitanija podzemnyh jelektropriemnikov glubokih shaht: obzor [Perfection of power circuits for underground electric receivers of deep mines: Overview]. Ostrovskij Je.P., Razgil'deev G.I, Voloshenko N.I. CNIJeIugol', vol. 9, 1985, 43 p.

32. Spravochnik po jelektroustanovkam ugol'nyh predprijatij. Jelektroustanovki ugol'nyh shaht [Handbook of electrical installations of coal enterprises. Electric installations of coal mines]. Gen. ed. V.V. Degtyareva, V.V. Serov. Moscow, Nedra, 1988, 727 p.

33. Spravochnik jenergetika ugol'noj shahty: v 2 t. [Handbook of power engineering of a coal mine: in 2 vol.]. Dzjuban V.S., et. al. Ed. B.N. Vaneev, 2-nd Ed., revised and enlarged. Donetsk, LLC “Jugo-Vostok, Ltd”, 2001, vol. 1, 477 p., vol. 2, 440 p.

34. Suhie transformatory RESIBLOC [Dry transformers RESIBLOC]. Electronic resource. Available at: http://new.abb.com/products/transformers/ru/sukhietransformatory/sukhie-transformatory-srednego-napryazhenia/transformatoryresibloc.

35. Suhie transformatory proizvodstva «GBE S.p.a.» [Dry transformers produced by GBE S.pa.a.]. Electronic resource. Available at: http://www.skont.com.ua/ru/suhie-transformatori-proizvodstva-laquogbe-sparaquo-italiya.

36. Tehnіchnі vimogi do sistemi elektropostachannja pіdzemnih spozhivachіv naprugoju 35 kV. [Technical requirements for the electricity supply system of underground consumers with a voltage of 35 kV]. O.V. Ostapchuk. Gіrnicha elektromehanіka ta avtomatika: Sci.-Tech. Collection, 2013, vol. 91, pp. 9-12. [in Ukrainian].

37. Ugol'naja promyshlennost' za rubezhom [Coal industry abroad].V.E. Zajdenvarg, N.I. Garkavenko, V.S. Afendikov, et. al. Moscow, Gornaja promyshlennost', 1993, 389 p.

38. Fedorov A.A. Osnovy jelektrosnabzhenija promyshlennyh predprijatij [Basics of power supply of industrial enterprises]. 2-nd Ed., revised and enlarged. Moscow, Energia, 1972, 416 p.

39. Shishkin N.F. Osnovnye napravlenija jelektrifikacii sovremennyh shaht [The main directions of electrification of modern mines]. N.F. Shishkin, V.F. Antonov. Moscow, Nauka, 1981, 116 p.

40. Shkrabets F.P. Glubokij vvod naprjazhenija 35 kV dlja pitanija potrebitelej glubokih gorizontov shahty ZAO «Zaporozhskij ZhRK» [Deep voltage input of 35 kV for power supply to consumers of deep horizons of CJSC Zaporizhzhya ZhRK]. F.P. Shkrabets, A.V. Ostapchuk, Ju.N. Bezruchko. Gіrnicha elektromehanіka ta avtomatika: Sci.-Tech. Collection, 2010, no. 84, pp. 69-76.

41. Shkrabets F.P. Sozdanie sovremennyh sistem zashhity jelektricheskih setej gornyh predprijatij [Creation of modern systems of protection of electric networks of mining enterprises]. Gornyi Zhurnal = Mining Journal, spec. issue, Moscow, Publ. Ore&Metals, 2010, pp. 34-40.

42. Shkrabets F.P. Puti povyshenija bezavarijnosti raspredelitel'nyh setej gornyh predprijatij [Ways to improve the trouble-free distribution networks of mining enterprises]. F.P. Shkrabets. Naukovij vіsnik NSU, 2009, vol. 1, pp. 59-65.

43. Shrajber A.A. Sovremennye i perspektivnye tehnologii dobychi uglja [Modern and promising technologies of coal mining]. A.A. Shrajber, V.B. Red'kin. Problemi zagal'noї energetiki, 2008, vol. 1(17), pp. 7-13. Available at: http://dspace.nbuv.gov.ua/bitstream/handle/123456789/2999/Shraiber.pdf

44. Shhuckij V.I. Zashhitnoe shuntirovanie odnofaznyh povrezhdenij jelektroustanovok [Protective shunting of single-phase faults in electrical installations]. V.I. Shhuckij, V.O. Zhidkov, Ju.N. Il'in. Moscow, Jenergoatomizdat, 1986, 152 p.

45. Shhuckij V.I. Nadezhnost' i bezopasnost' jelektrosnabzhenija podzemnyh gornyh rabot: Spravochnoe posobie [Reliability and safety of electric power supply of underground mining operations: A reference book]. V.I. Shhuckij, M.I. Makarov, Je.R. Osipov. Moscow, Nedra, 1994, 255 p.

46. Jekspluatacionnye rezhimy jelektrojenergeticheskih sistem i ustanovok [Operational modes of electric power systems and installations]. R. Rjudenberg; trans. from German I.Z. Boguslavskii, B.A. Cvetkov, 3-rd ed., abb. Leningrad, Jenergija, Leningrad branch, 1981, 576 p.

47. Jelektrifikacija gornogo proizvodstva [Electrification of mining]. Textbook for high schools, in 2 vol. Ed. L.A. Puchkov, G.G. Pivnjak. Publ. MSMU, 2007, vol. 1, 511 p., vol. 2, 595 p.

48. Jelektrifikacija gornyh rabot [Electrification of mining operations]. Ed. S.A. Volotkovskii. Kiev, Vishha shkola, 1980, 448 p.

49. Jelektrobezopasnost' v gornodobyvajushhej promyshlennosti [Electrical safety in the mining industry]. L.V. Gladilin, V.I. Shhuckij, Ju.G. Bazhencev, et. al. Moscow, Nedra, 1977, 327 p.

50. Jelektrooborudovanie i jelektrosnabzhenie gornorudnyh predprijatij [Electrical equipment and power supply of mining enterprises]. Ed. V.S. Vinogradov. Moscow, Nedra, 1983, 335 p.

51. Jelektrosnabzhenie ugol'nyh shaht [Electricity supply of coal mines]. S.A. Volotkovskij, Ju.T. Razumnyj, G.G. Pivnjak, F.P. Shkrabets. Moscow, Nedra, 1984, 376 p.

52. Damiano N., Homce G., Jacksha R. A review of underground coal mine emergency communications and tracking system installations. Coal Age, 2014, 119 (11), pp. 34-35.

53. Gas-Insulated Switchgear up to 36 kV. Electronic resource. Available at: http://www.schneider-electric.com/en/product-range-presentation/60712-flusarc-36.

54. Marinovic, N. Electrotechnology in Mining. N. Marinovic, Rudarska elektrotehnika, Amsterdam, Elsevier Science Publishers B.V., 1990, 613 p.

55. Mittra D.K. Earth-fault diversion - A novel technique for safer use of electricity in underground coal mines. Coal International Mining and Quarry World, 1996, 244 (3), p. 123.

56. Shсrabets F. Modern development principles of protection and diagnostics in mining facilities mains and distribution grids. F. Shсrabets, O. Ostapchuk. Gіrnicha elektromehanіka ta avtomatika. Sci.-Tech. Collection, 2014, vol. 92, pp. 40-48.

57. Società Elettromeccanica Arzignanese. Via L Galvani, 8, 36070 Tezze di Arzignano (VI) Italia. Available at: www.seatrasformatori.it.

58. Wang Xi-Fan Modern Power Systems Analysis. Xi-Fan Wang, Yonghua Song, Malcolm Irving. New York, NY, USA: Springer Science+Business Media, LLC, 2008, 559 p.

59. Damiano N., Homce G., Jacksha R. A review of underground coal mine emergency communications and tracking system installations. Coal Age, 2014, 119 (11), pp. 34-35.