Study of leakage current in underground mine power network: a case study in mining in Vietnam
/ 0
- Details
- Category: Content №6 2023
- Last Updated on 23 December 2023
- Published on 30 November -0001
- Hits: 2311
Authors:
Nguyen Truong Giang, orcid.org/0009-0007-4900-5418, Hanoi University of Mining and Geology, Hanoi, the Socialist Republic of Vietnam
Do Nhu Y*, orcid.org/0000-0001-6395-2875, Hanoi University of Mining and Geology, Hanoi, the Socialist Republic of Vietnam, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Nguyen Thac Khanh, orcid.org/0009-0004-3122-9884, Hanoi University of Mining and Geology, Hanoi, the Socialist Republic of Vietnam
Ngo Xuan Cuong, orcid.org/0000-0002-0571-2168, School of Engineering and Technology, Hue University, Hue, the Socialist Republic of Vietnam
* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2023, (6): 086 - 092
https://doi.org/10.33271/nvngu/2023-6/086
Abstract:
Purpose. To determine DC leakage current in mine power network with long DC power transmission.
Methodology. Nowadays, the increase in capacity and working depth leads to the use of DC power transmission, which has many benefits both economically and technically in mining. However, the appearance of DC power transmission changes the structure of the network. In the underground mine power network, there will be electrical networks with industrial frequency 50 Hz, DC power networks, and power networks after variable frequency inverters. The correlation of these network parameters complicates leakage protection in the mine power network. For DC power transmission in mining, the DC network parts have a large length, so during the working process, electricity leakage in these parts of the network often occurs. Leakage current in a DC network depends not only on DC network parameters but also on AC network parameters. The article uses analytical methods and simulation methods on Matlab/Simulink software to determine leakage currents in underground mine power networks with DC transmission when there is a change in power network parameters.
Findings. The research results show that the leakage current value of the DC network is greatly affected when the insulation parameters of the electrical network change, not only in the DC power network but also in the AC network before and after the inverter. This causes the unreliable operation of the leakage protection device in this DC transmission network.
Originality. Calculation model and simulation of DC leakage current in underground mine power networks with long DC transmission in mining in Vietnam
Practical value. The research results are the basis for calculating and selecting leakage protection equipment for the purpose of improving safety in underground mining in Vietnam.
Keywords: electrical safety, DC transmission, mine power network, leakage protection, leakage current, underground mining
References.
1. Que, C. T., Nevskaya, M., & Marinina, O. (2021). Coal Mines in Vietnam: Geological Conditions and Their Influence on Production Sustainability Indicators. Sustainability, 13(21), 11800. https://doi.org/10.3390/su132111800.
2. Statista (2023). Share of power production and purchase in Vietnam as of the first 7 months into 2022, by type of resource. Retrieved from https://www.statista.com/statistics/984046/vietnam-power-supply-share/.
3. Dang, H. T., Tran, H. D., Tran, N. T., Tran, A. H., & Sasakawa, M. (2014). Potential reuse of coal mine wastewater: a case study in Quang Ninh, Vietnam. Retrieved from https://hdl.handle.net/2134/31032.
4. Vinacomin (2013). Coal mining industry in the world. Retrieved from https://vinacomin.vn/tin-quoc-te/cong-nghiep-khai-thac-than-tren-the-gioi-6115.html.
5. Lösch, R., Grehl, S., Donner, M., Buhl, C., & Jung, B. (2018). Design of an autonomous robot for mapping, navigation, and manipulation in underground mines. International Conference on Intelligent Robots and Systems, 1407-1412. https://doi.org/10.1109/IROS.2018.8594190.
6. Nguyen, K. T., Kim, L. N., Nguyen, S. T., & Nguyen, G. T. (2020). Research, design, manufacture leakage current protection device for 660 V/1140 V underground mine electrical networks. Journal of Mining and Earth Sciences, 61(5), 96-103. https://doi.org/10.46326/JMES.2020.61(5).11.
7. Thanh, L. X., & Bun, H. V. (2022). Identifying the factors influencing the voltage quality of 6 kV grids when using electric excavators in surface mining. Mining of Mineral Deposits, 16(2), 73-80. https://doi.org/10.33271/mining16.02.073.
8. Lee, J. H., Yoon, M., Jung, S., & Jang, G. (2015). System reliability enhancement in a metropolitan area using HVDC technology. Journal of International Council on Electrical Engineering, 5(1), 1-5. https://doi.org/10.1080/22348972.2015.1011771.
9. Abedin, T., Lipu, M. S. H., Hannan, M. A., Ker, P. J., Rahman, S. A., Yaw, C. T., & Muttaqi, K. M. (2021). Dynamic modeling of hvdc for power system stability assessment: A review, issues, and recommendations. Energies, 14(16), 4829. https://doi.org/10.3390/en14164829.
10. Jovcic, D. (2019). High voltage direct current transmission: converters, systems and DC grids. John Wiley & Sons. https://doi.org/10.1002/9781119566632.
11. De Castro Júnior, J. A., de Paula, H., Cardoso Filho, B. J., & Rocha, A. V. (2011). Avoiding undesirable high-frequency phenomena in long cable drives: Rectifier-to-inverter connection through long DC cable-part II: The complete copper economy characterization. IEEE Industry Applications Society Annual Meeting, 1045-1050. https://doi.org/10.1109/IECON.2009.5414698.
12. Yaghoobi, J., Abdullah, A., Kumar, D., Zare, F., & Soltani, H. (2019). Power quality issues of distorted and weak distribution networks in mining industry: A review. IEEE Access, (7), 162500-162518. https://doi.org/10.1109/ACCESS.2019.2950911.
13. Hou, L., Chen, D., Li, T., Zhao, M., & Ren, H. (2022). Design and research on DC electric leakage protection circuit breaker. Energies, 15(15), 5605. https://doi.org/10.3390/en15155605.
14. Levačić, G., Župan, A., & Čurin, M. (2018). An overview of harmonics in power transmission networks. First International Colloquium on Smart Grid Metrology (SmaGriMet), (1-6), 17806615. https://doi.org/10.23919/SMAGRIMET.2018.8369828.
15. Thanh, L. X., & Bun, H. V. (2021). Identifying the efficiency decrease factor of motors working under power harmornic in 660 V electric mining grids. Mining of Mineral Deposits, 15(4), 108-113. https://doi.org/10.33271/mining15.04.108.
16. Benasla, M., Allaoui, T., Brahami, M., Denai, M., & Sood, V.K. (2018). HVDC links between North Africa and Europe: Impacts and benefits on the dynamic performance of the European system. Renewable and Sustainable Energy Reviews, (82), 3981-3991. https://doi.org/10.1016/j.rser.2017.10.075.
17. de Castro Júnior, J. A., de Paula, H., Cardoso Filho, B. J., & Rocha, A. V. (2011). Rectifier-to-inverter connection through long DC cable-part II: The complete copper economy characterization. IEEE Industry Applications Society Annual Meeting, 1-7. https://doi.org/10.1109/IAS.2011.6074433.
18. de Paula, V. C., & de Paula, H. (2015). Employing DC transmission in long distance AC motor drives: Analysis of the copper economy and power losses reduction in mining facilities. IEEE Industry Applications Society Annual Meeting, 1-7. https://doi.org/10.1109/IAS.2015.7356899.
19. Marek, A. (2017). Influence of indirect frequency converters on operation of central leakage protection in underground coalmine networks. Mining-Informatics, Automation and Electrical Engineering, 55(3), 9-14. https://doi.org/10.7494/miag.2017.3.531.9.
20. Marek, A. (2010). Zabezpieczenia upływowe w sieciach z przemiennikami częstotliwości w podziemiach kopalń. Mechanizacja i Automatyzacja Górnictwa, 48(2), 30-35. Retrieved from https://yadda.icm.edu.pl/baztech/element/bwmeta1.element.baztech-article-BGPK-2828-1066/c/Marek.pdf.
21. Cocina, V., Colella, P., Pons, E., Tommasini, R., & Palamara, F. (2016). Indirect contacts protection for multi-frequency currents ground faults. IEEE 16th International Conference on Environment and Electrical Engineering, 1-5. https://doi.org/10.1109/EEEIC.2016.7555701.
22. Drabek, P., Fort, J., & Pittermann, M. (2011). Negative Influence of Frequency Converters on Power Distribution Network. Advances in Electrical and Electronic Engineering, 5(1), 72-75. Retrieved from http://advances.utc.sk/index.php/AEEE/article/viewFile/176/202.
23. Wylie, T. (2017). Mining Earth Leakage Protection with Variable Speed Drives. Retrieved from https://www.ampcontrolgroup.com/wp-content/uploads/2017/05/Mining-Earth-Leakage-Protection-With-Variable-Speed-Drives.pdf.
24. Kozłowski, A., & Bołoz, Ł. (2021). Design and research on power systems and algorithms for controlling electric underground mining machines powered by batteries. Energies, 14(13), 4060. https://doi.org/10.3390/en14134060.
Newer news items:
- Dual form of education within the framework of contemporary educational trends in Ukraine - 23/12/2023 01:29
- Structuring “education – migration – labour market” chain - 23/12/2023 01:29
- Legal provision of social protection of employees in the conditions of martial law - 23/12/2023 01:29
- Automated building damage detection on digital imagery using machine learning - 23/12/2023 01:29
- Methodology of creation and development of information systems for technological safety of mining facilities - 23/12/2023 01:29
- Legal support of labor protection standards under martial law - 23/12/2023 01:29
- Activities efficiency assessment of the governing body’s task force under environmental emergency - 23/12/2023 01:29
- Assessment of coal mining impact on the geoecological transformation of the Emerald network ecosystem - 23/12/2023 01:29
- Smart grid projects in the pan-European energy system - 23/12/2023 01:29
- Accounting for a positive, negative and zero sequences power in a three-phase unbalanced electrical system - 23/12/2023 01:29
Older news items:
- A methodological approach to assessing the durability of welded structures of screens using SolidWorks Simulation software - 23/12/2023 01:29
- Mathematical models for determining and analyzing thermal regimes in mining industry mechanism structures - 23/12/2023 01:29
- Efficiency and seismic safety of constructing underground structures in complex rock masses - 23/12/2023 01:29
- Analysis and prediction of surface settlements during the digging of underground mining works (Algeria) - 23/12/2023 01:29
- Problems of operating heating boilers of increased environmental efficiency - 23/12/2023 01:29
- Recycling of barite ore tailings into porcelain: microstructure and dielectric properties - 23/12/2023 01:29
- Data analysis solutions to improve blasting efficiency in mining - 23/12/2023 01:29
- Mathematical substantiation and creation of information tools for optimal control of drilling and blasting in open-pit mine - 23/12/2023 01:29
- Managing the process of underground coal gasification - 23/12/2023 01:29
- Use of backscattering ultrasound parameters for iron ore varieties recognition - 23/12/2023 01:29
Archive