Improving Safety and Efficiency of Power Supply to Ore Mining Sites at the High Mountain Mine


Annotation:

The results of study in the field of improving safety and efficiency of power supply to ore mining sites at a high mountain mine are presented. It is shown that safety and efficiency of power supply, as well as the hazard of electric shock in the electrical installations with a voltage of 6 kV, largely depends on the number of single-phase earth faults. It is established that high earth fault currents make it necessary to compensate for capacitive currents in 6 kV networks by installing compensating (arc-quenching) reactive coils. This will allow to reduce the ground fault currents to 3–5 A, increase the network insulation impedance by a factor of 4–6, reduce the over-voltages in the undamaged phases during ground faults, and improve conditions of ensuring electrical safety.

It is substantiated that at the sections of the cable network leading to substations 25, 26, 28 and «Stvol», the resistance level is higher than the average for the high mountain mine, and in the sections of substations 31–35 and substation 33 it is slightly lower than the average. The worst state of insulation (maximum leaks) is observed at the sections of substations 31–106 and 31–34, where the insulation level is lower than the average by 16.6 and 3.56 times, respectively. 

It is recommended to carry out a preventive check of not only the condition of the cable, but also cable couplings, equipment at substations 31, 34 and 106 at these sites. And in the future, to continue study on high earth fault currents in the absence of control over the continuity of the earth network. Recommendations are given to improve the operation of electrical networks, to make fuller use of existing networks, and to ensure safe conditions for the maintenance of electrical installations of the networks with a voltage of 6 kV of the high mountain mine.

References:
1. Lyashenko V.I., Franchuk V.P., Kislyy B.P. Reengineering of technical-and-technological structure of uranium mine. Gornyy zhurnal = Mining journal. 2015. № 1. pp. 26–32. (In Russ.). DOI: 10.17580/gzh.2015.01.05
2. Klyuev R.V., Bosikov I.I., Mayer A.V., Gavrina O.A. Comprehensive Analysis of the Effective Technologies Application to Increase Sustainable Development of The Natural-Technical System. Ustoychivoe razvitie gornykh territoriy = Sustainable development of Mountain Territories. 2020. № 2. pp. 283–290. (In Russ.). DOI: 10.21177/1998-4502-2020-12-2-283-290
3. De Oliveira E.M., Oliveira F.L.C. Forecasting mid-long term electric energy consumption through bagging ARIMA and exponential smoothing methods. Energy. 2018. Vol. 1441. pp. 776–788. DOI: 10.1016/j.energy.2017.12.049
4. Klyuev R.V., Bosikov I.I., Gavrina O.A., Atrushkevich V.A. Selection of Protection Means for High-Voltage Excavator Engine at the Open-Pit Mine of the Mining and Metallurgical Plant. Bezopasnost Truda v Promyshlennosti = Occupational Safety in Industry. 2020. № 7. pp. 46–53. (In Russ.). DOI: 10.24000/0409-2961-2020-7-46-53
5. Golik V., Komashchenko V., Morkun V., Burdzieva O. Metal deposits combined development experience. Metallurgical and Mining Industry. 2015. Vol. 7. № 6. pp. 591–594.
6. Zhukovskiy Y., Batueva D., Buldysko A., Shabalov M. Motivation towards energy saving by means of IoT personal energy manager platform. Journal of Physics: Conference Series. 2019. Vol. 1333. Iss. 6. DOI: 10.1088/1742-6596/1333/6/062033
7. Buryanina N., Korolyuk Yu., Koryakina M., Suslov K., Lesnykh E. Four Samples Method for the Selection of Sinusoidal Components Parameters of Power System Emergency Mode. International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon). IEEE, 2019. DOI: 10.1109/FarEastCon.2019.8934775
8. Wei N., Li Ch., Peng X., Zeng F., Lu X. Conventional models and artificial intelligence-based models for energy consumption forecasting: A review. Journal of Petroleum Science and Engineering. 2019. Vol. 181. DOI: 10.1016/j.petrol.2019.106187
9. He Y., Zheng Y., Xu Q. Forecasting energy consumption in Anhui province of China through two Box-Cox transformation quantile regression probability density methods. Measurement. 2019. Vol. 136. pp. 579–593. DOI: 10.1016/j.measurement.2019.01.008
10. Klyuev R.V., Bosikov I.I., Gavrina O.A. Improving the efficiency of relay protection at a mining and processing plant. Zapiski Gornogo instituta = Journal of Mining Institute. 2021. Vol. 248. pp. 300–311. (In Russ.). DOI: 10.31897/PMI.2021.2.14
11. Wang J.Q., Du Yu, Wang J. LSTM based long-term energy consumption prediction with periodicity. Energy. 2020. Vol. 197. DOI: 10.1016/j.energy.2020.117197
12. Wang R., Lu Sh., Feng W. A novel improved model for building energy consumption prediction based on model integration. Applied Energy. 2020. Vol. 262. DOI: 10.1016/j.apenergy.2020.114561
13. Usmanova T.Kh., Isakov D.A. Important Aspects of Power Costs of the Mineral Mining Industry. Gornaya promyshlennost = Russian Mining Industry. 2018. № 6 (142). pp. 30–33. (In Russ.).
14. Khomenko O.E., Kononenko M.N., Lyashenko V.I. Safety Improving of Mine Preparation Works at the Ore Mines. Bezopasnost Truda v Promyshlennosti = Occupational Safety in Industry. 2018. № 5. pp. 53–59. (In Russ.). DOI: 10.24000/0409-2961-2018-5-53-59
15. Khomenko O.E., Kononenko M.N., Lyashenko V.I. Improvement of Safety for the Underground Vertical Workings. Bezopasnost Truda v Promyshlennosti = Occupational Safety in Industry. 2021. № 2. pp. 41–48. (In Russ.). DOI: 10.24000/0409-2961-2021-2-41-48
DOI: 10.24000/0409-2961-2022-1-7-13
Year: 2022
Issue num: January
Keywords : safety efficiency high mountain mine ore mining sites power supply electrical substations single-phase short circuits multi-phase short circuits
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