Compound mixtures based on hydrolyzed Polyacrylonitrilereducing soil electrical resisctivity

THE PURPOSE. The purpose of the article is to define the reasons to improve the system of grounding devices design. Author studies technical decisions that reduce grounding resistance values. Results are given researches how a mineral conductive mixture, that normalizes grounding, influences a seasonal coefficient. Analysed the results of the experimental surveys. Аlso evaluates a test grounding devise’s resistance decrease compared to the resistance decrease of a control grounding device. METHODS. While solving the above problem, a number of field experiments were carried out to measure the resistance values of experimental circuit grounding devices after their near-electrode soil space had been treated with the mixture that improves the resistance of a grounding wire. RESULTS. The composition of the mixture that normalizes (reduces) soil electrical resistivity has been developed, it has contained hydro-stabilizing and lowdispersed conducting additives. There has been proposed the analytical expressions to evaluate equivalent soil electrical resistivity values after aporton of soil had been submitted by the mineral conducting mixture. CONCLUSION. The use of the mixtures based on hydrolyzed polyacrylonitrile is most effective together with the grounding wires buried in soil no deeper than the soil freezing depth that is located in the soil layers with maximum seasonal fluctuations, and will increase with the increase of the contact area of such grounding wires with the soil treated with hydrolyzed polyacrylonitrile. Additional decrease of a seasonal coefficient for the vertical compound grounding wires apparently is due to the mixture influencing their parts mounded near the ground surface. The use of complex mixtures containing both hydro-stabilizing additives and low-dispersed conducting substances allows up to three times decrease of the resistance values of a grounding device compared to a control grounding device, it allows to even seasonal fluctuation of resistance of a grounding device, and to decrease mounting capital investment for a grounding device by means of the decrease of the number of the electrodes and the territory on which they are located.

1. Naydenov AI, Dmitriev EA. Parameters of grounding devices for the protection of personnel and equipment. Vestnik ISTU. 2011;11 (58):109–112.

2. Sosnin VV. Functional grounding. Chief Power Engineer. 2020;7:15-22.

3. Ivliev EA. Electricity. 1992;7:41-44.

4. Vedeneeva LM, Chudinov AV. Investigation of the influence of basic soil properties on

5. the resistance of grounding device. Bulletin of the Perm National Research Polytechnic University. Geology. Oil and gas and mining. 2017;16(1):89-100.

6. Kriksin PV, Bohan NV. Energy and management. 2011;6 (63):18-20.

7. Zhuang Chi-jie, Zeng Rong, Zhang Bo, et al. Grounding system design method in high soil resistivity regions [J]. High Voltage Engineering. 2008;34(5):893-897.

8. Coelho Vilson L, Piantini A, Almaguer Hugo AD, et al. The influence of seasonal soil moisture on the behavior of soil resistivity and power distribution grounding systems. In The Lightning Flash and Lightning Protection (SIPDA 2013). Electric Power Systems Research. 2015;118:76-82.

9. Drako M.A. Energy strategy. 2019;6 (69):44-48.

10. Tung CC, Lim SC. Performance of electrical grounding system in soil at low moisture content condition at various compression levels. Journal of Engineering Science and Technology. 2017;12(1):27–47.

11. Gribanov, Bipron AN. - grounding of electrical installations. Exposition Oil Gas. 2016. P. 72–75.

12. Kiselev VG, Ruzich EN. Dielectric coatings and their effect on corrosion protection of the outer surface of underground pipelines. Power engineering: research, equipment, technology. 2018;20(1-2):80-89.

13. Dremicheva ES, Zvereva ER. Study corrosion processes of oil equipment. Power engineering: research, equipment, technology. 2018;20(1-2):138-143.

14. Osipenko OV, Drako MA, Moiseenko OA. Energy and management. 2015;1 (82):5-9.

15. Kolik VR, Drako MA, Moiseenko OA. Energy Strategy. 2014;2:23–25.

16. Leonovich II, Virko NP. Construction science and technology, 2011;5:27–35.

17. Baraishuk SM, Pavlovich IA. Agropanorama. 2020;1 (137):20-23.

18. Shi L, Yang N, Zhang H, et al. Anovel poly (glutamic acid) /silk-sericinhydrogel for wound dressing: Synthesis, characterization and biological evaluation. Materials Science and Engineering: C. 2009;48 (1):533-540.

19. Ferre PA, Redman JD, Rudolph DL, et al. The dependence of the electrical conductivity measured by time domain reflectometry on the water content of a sand, Water Resour. Res., 1998.

20. Lai, Yang & Hu, Yuhang. (2018). Probing the swelling-dependent mechanical and transport properties of polyacrylamide hydrogels through AFM-based dynamic nanoindentation. Soft Matter. 14. 10.1039/C7SM02351K.

21. Shirinov ShD, Jalilov AT. Universum: Chemistry and biology: electron. scientific. zhurn. 2018;3 (45).

22. Russo Matthew & Warren Holly & Spinks, et al. (2018). Hydrogels Containing the Ferri/Ferrocyanide Redox Couple and Ionic Liquids for Thermocells. Australian Journal of Chemistry. 72. 10.1071/CH18395.

23. Lai Y, Hu Y. Probing the swelling-dependent mechanical and transport properties of polyacrylamide hydrogels through afm-based dynamic nanoindentation Soft Matter. 2018;14 10.1039/C7SM02351K.

24. Dehne H, Hecht F, Bausch A. The mechanical properties of polymer-colloid hybrid hydrogels. Soft Matter 2017;13:10.1039/C7SM00628D.

25. Zaitseva NM. Experimental determination of electrical resistivity. Scientific problems of transport in Siberia and the Far East. 2011;1:351–354.

26. Hannig M. Calculation of the assembled grounding resistance from complex grounding systems by using analytical considerations onlty. 2018 IEEE International Conference on High Voltage Engineering and Application (ICHVE), 2018, doi: 10.1109/ICHVE.2018.8641921.

27. Unde MG, Kushare BE. Grounding grid performance of substation in two layer soil - a parametric analysis. International Journal of Engineering Sciences & Emerging Technologies. 2012;1(2):69-76. doi: 10.7323/ijeset/v1_i2_8.

28. Koliushko DG, Rudenko SS. Mathematical model of grounding connection of a power plant with under layer. Electronic modeling. 2014;36(2):89-97.

29. Jovanovic D, Cvetkovic N, Raicevic N, et al. (2016). Comparative analysis of plate and grid ground electrode characteristics as a part of grounding system. 2016 International Conference on Smart Systems and Technologies (SST) Published 2016 Engineering pp.35-40. 10.1109/SST.2016.7765628.

30. Chung seog Choi, Hyang Kon Kim, Hyoung Jun Gil, et al. The Potential Gradient of Ground Surface according to Shapes of Mesh Grid Grounding Electrode Using Reduced Scale Model”, IEEJ Trans. on Power and Energy. 2005;125(12):1170-1176.

31. Myint Su, Mon Hla, Khin Thidar; et al. International Journal of Advanced Technology and Engineering Exploration. Bhopal.2020;7:63.:28-35.