THE METHOD OF ESTIMATION AND FORECASTING OF A RESIDUAL RESOURCE OF ISOLATION IN CABLE LINES
Abstract
The article deals with the monitoring of the state of insulation of power cable lines (PCL). It is shown that the presence of impurities or oxidation products resulting from heating in the insula-tion material (IM) leads to leakage currents. A mathematical model is obtained to calculate the power of the CR, as well as to determine the location of the inclusion of m1 in the main radiation, due to the power of the active component of the leakage current, when it occurs in the main cable insulation. The calculation of the change in the heat flux passing through the insulation layers of the cable is carried out depending on the radial distances by the method of piecewise given func-tions, taking into account the thermal conjugation of the inclusion. The proposed mathematical model allows to determine the presence of inclusions along with the layer-by-layer calculation of isotherms in the cross section of the cable. The technique proposed in the developed model allows to account for heat losses based on the thermal and geometric dimensions of the inclusion, which was not taken into account in the above models. A method for determining the service life of the insulation material taking into account the total electric field strength in the insulation material for different inclusion sizes, as well as geometric and electrical parameters of inclusions; activa-tion energy of the structural breakdown of the material. The aging model of the insulation material will allow to use it to determine the residual life and predict the wear of the insulation material. The reliability of IM, namely the service life of the insulating material of CL from the tension and temperature, in comparison with the basic formula is investigated. Experimental studies of insula-tion reliability have been carried out, namely, an algorithm has been developed and simulation of the service life of PCL insulation from tension and temperature has been performed. The questions of technical service of power cable lines with the use of modern non-destructive diagnostic meth-ods are considered.
References
2. Полуянович Н.К., Тибейко И.А. Эксплуатация и ремонт систем электроснабжения про-мышленных предприятий. – Таганрог, 2014.
3. Полуянович Н.К., Дубяго М.Н., Щуровский В.А. Методы испытания силового электро-оборудования. – Таганрог, 2016.
4. Зайцев Е.С. и др. Моделирование тепловых процессов в кабеле с изоляцией из сшитого полиэтилена средствами Matlab и Simulink // Матер. НПК. Ч. 1. – СПб.: Изд-во Политех-нического университетата, 2014. – 176 с.
5. Полуянович Н.К., Дубяго М.Н. Термофлуктуационный метод диагностики состояния изоляционных материалов СКЛ и прогнозирование их остаточного ресурса // Известия высших учебных заведений. Электромеханика. – 2018. – Т. 61, № 5. – С. 66-71.
6. Дубяго М.Н., Полуянович Н.К., Пшихопов В.Х. Метод исследования термофлуктуацион-ных процессов в задачах диагностики и прогнозирования изоляционных материалов // Вестник Донского государственного технического университета. – 2017. – Т. 17, № 3 (90). – С. 117-127.
7. Дубяго М.Н., Полуянович Н.К. Термодинамический способ выявления деструкции изо-ляции в задачах диагностики и прогнозирования ресурса кабельных систем // Инженер-ный вестник Дона. – 2017. – № 3 (46). – C. 25.
8. Dubyago M.N. and Poluyanovich N.K. Thermal Processes of the Isolating Materials in Prob-lems of Nondestructive Diagnostics of the Main and Distributive Power Stations // IOP Con-ference Series: Materials Science and Engineering. 229. – 2017.
9. Дубяго М.Н., Пшихопов В.Х., Полуянович Н.К. Оценка и прогнозирование изоляционных материалов силовых кабельных линий // Известия ЮФУ. Технические науки. – 2015. – № 7 (168). – C. 230-237.
10. Дубяго М.Н., Пшихопов В.Х., Полуянович Н.К. Оценка и прогнозирование изоляционных материалов силовых кабельных линий // Известия ЮФУ. Технические науки. – 2015. – № 7 (168). – С. 230-237.
11. Dubyago M.N., Poluyanovich N.K. Thermal processes of the isolating materials in problems of nondestructive diagnostics of the main and power supply systems // EAI Endorsed Transac-tions on Energy Web and Information Technologies. 18(16): e3.
12. Dubyago M.N. and Poluyanovich N.K. Prediction of residual life of isolating materials in the process of thermal power equipment deterioration // 2017 2nd International Conference on Ad-vanced Materials Research and Manufacturing Technologies (AMRMT 2017) 2–5 August 2017, Phuket, Thailand IOP Conference Series: Materials Science and Engineering. – 2017. – Vol. 229. – 012036. – ISSN: 1757-899X.
13. Дубяго М.Н., Полуянович Н.К. Метод амплитудного и фазового распределения импульсов частичных разрядов в задачах исследования изоляции кабельных линий // Известия ЮФУ. Технические науки. – 2012. – № 7 (132). – С. 200-205.
14. Dubyago M.N., Poluyanovich I.A., Poluyanovich N.K. Thermodynamic approach for identifying oxidative processes insulation breakdown // Applied Mechanics and Materials. – 2015. – Vol. 752-753. – P. 1153-1157.
15. Dubyago M.N., Poluyanovich N.K. Prediction of residual life of isolating materials in the pro-cess of thermal power equipment deterioration // Advances in energy, environment and chemi-cal engineering (AEECE 2015). – 2015. – P. 49-54
16. Poluyanovich N.K., Rassoha D.P., Formanyuk V.S. The automatic electric isolation defects diagnosing system's algorithm development // Proceedings of X International Saum Confer-ence on Systems, Automatic Control and Measurements (SAUM 2010). – 2010. – P. 265-269.
17. Dubyago M.N., Poluyanovich N.K. Analysis of insulation materials of cable systems by meth-od of partial discharges // Advances in Materials Science and Applications. – 2015. – Vol. 4, No. 1. – P. 23-32.
18. Дубяго М.Н., Полуянович Н.К. Неразрушающий метод прогнозирования остаточного ресурса силовых кабельных линий // Информатика, вычислительная техника и инженер-ное образование. – 2012. – № 1 (8). – C. 27-33. 19. Poluyanovich N.K., Dubyago M.N. Study of characteristics of partial discharge for assessment of condition of electrical insulating materials of power supply system // Applied Mechanics and Materials. – Vol. 459. – P. 70-75.
20. Dubyago M.N., Poluyanovich N.K. Thermal Processes of the Isolating Materials in Problems of Nondestructive Diagnostics of the Main and Distributive Power Stations // IOP Conference Series: Materials Science and Engineering. 229(1),012036. 21. Dubyago M.N., Poluyanovich N.K. Thermal processes of the isolating materials in problems of nondestructive diagnostics of the main and power supply systems // EAI Endorsed Transac-tions on Energy Web 5(16),e3.
22. Dubyago M.N. & Poluyanovich N.K. Thermal processes of the isolating materials in problems of nondestructive diagnostics of the main and distributive power stations // EAI Endorsed Transactions on energy Web and Information Technology 12 2017-01. – 2018. – Vol. 5, Issue 16. E3.
23. Dubyago M.N. Poluyanovich N.K. Dependence of dielectric loss tangent on the parameters of multilayer insulation materials cable. Environment, Energy and Applied Technology – Sung & Kao (eds), 2015 Taylor & Francis Group, London. – P. 1003-1007. ISBN 978-1-138-02691-9. 24. Dubyago M.N., Poluyanovich N.K. Thermal processes of the isolating materials in problems of nondestructive diagnostics of the main and distributive power stations. EAI Endorsed Transactions on Energy Web and Information Technologies 18(16): e3. ж. SJR SCImago Journal & Coutry Rank
25. Marina N. Dubyago and Nikolay K. Poluyanovich. Estimation of Insulating Materials Depre-ciation and Forecasting the Residual Cable Resource Considering the Current Core Tempera-ture // International Journal of Materials, Mechanics and Manufacturing. – 2019. – Vol. 7, No. 1. – P. 415-420.
