Статті в журналах: "Reliability of electrical equipment"

1

Li, Jun, Qing Wei Dong, Ye Zhan, and Xiang Bin Yu. "Reliability Study of Aviation Equipment." Advanced Materials Research 933 (May 2014): 428–33. http://dx.doi.org/10.4028/www.scientific.net/amr.933.428.

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It is well-known that reliability of equipment is the most important of all performance to all equipments. In order to make the equipments which include mechanical equipments, electrical equipments and so on work normally, reliability theory FMECA is applied in an aviation equipment to study its reliability and improve operational reliability of the product. Through its reliability mathematical model, average of operational time is predicted based on calculating failure probability of all electrical components. According to the process of FMECA, all kinds of the failure mode, reasons, effects and criticality of the products can be determined completely. By comparing these criticality data as shown, the paper analyses adopted method by that the contents, accents and operating process of maintenance may be instituted finally. FMECA-based method for reliability study of the equipment and the equipment maintenance perform well. The results indicate that application of FMECA method can analyze reliability in detail and improve operational reliability of the equipment. Therefore this will supply theoretical bases and concrete measures of maintenance of the products to improve operational reliability of products. FMECA can be feasible and effective for improving operational reliability of all equipments.

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2

Doan, Daniel. "Equipment Reliability and Electrical Safety [Electrical Safety]." IEEE Industry Applications Magazine 21, no. 4 (July 2015): 5. http://dx.doi.org/10.1109/mias.2015.2417474.

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3

Jiang, Jing. "Reliability Test and Analysis of Electrical Automation Control Equipment." Applied Mechanics and Materials 556-562 (May 2014): 2380–83. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.2380.

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For a long time, reliability plays an extremely important role in electrical automation control equipment. To improve electrical automation control equipment’s reliability, the job should be promoted to a strategic height so as to assume and effectively control the factors affecting the reliability of the equipment, thus ensure the accuracy of reliability test. This paper, based on this, first is to implement the reliability influence factors analysis, and then introduces the main testing methods. By contrast, it finally comes to the conclusion that this article can provide certain reference for the research of related topics.

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4

Naumov, Igor V., Elena V. Karpova, and Dmitriy N. Karamov. "Reliability level research in distribution electrical networks of Irkutsk." E3S Web of Conferences 114 (2019): 03005. http://dx.doi.org/10.1051/e3sconf/201911403005.

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Forecasting of level of reliability of power supply of consumers is one of the major tasks at implementation of actions for improvement of operational characteristics of distribution electrical networks. On the one hand, assessment of damageability allows to develop a number of actions for increase in reliability of electric equipment and elements of electrical networks, with another, to create a stock of that equipment which is subject to risk of premature failure. The purpose of the present article is implementation of statistical assessment of damageability of basic elements of distribution electrical networks of 10 kV on the basis of the predicted information on possible refusals in these networks. The main objectives for achievement of the specified purpose are: 1. Implementation of preventive assessment of refusals in electrical networks on the basis of data of dispatching magazines of observations; 2. Statistical assessment of casual events of failures of electric equipment and detection of their laws of distribution.

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5

Li, Ming. "Reliability Test and Analysis of Electrical Automation Control Equipment." Applied Mechanics and Materials 556-562 (May 2014): 2233–36. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.2233.

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Improve the reliability of electrical automation control equipment is hot issues manufacturer and user have been focused on, therefore, the relevant measures must be taken to strengthen the reliability of the electrical automation control equipment. This paper discusses on the reliability test method and the status quo of electrical automation control equipment, and further discusses the measures to improve the reliability of the electrical automation control equipment and the choice of control equipment reliability test method of.

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6

Bychkov, Anatoly V. "VIBRATION DIAGNOSTICS SYSTEM FOR ELECTRIC MOTOR WITH ACTIVE ULTRASONIC SENSING." Vestnik Chuvashskogo universiteta, no. 1 (March 30, 2022): 34–43. http://dx.doi.org/10.47026/1810-1909-2022-1-34-43.

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At present, part of the fixed assets of electric grid infrastructure is becoming obsolete in the Russian Federation. It leads to an inevitable decrease of operational reliability of single electrical equipment and power-supply systems as a whole. At the same time the requirement to the reliability for most electrotechnical complexes is the main one. As a result, diagnostics is the most important process in electrical equipment’s operation. Diagnostics is based on measurements, control and analysis of a large number of equipment’s characteristics and parameters. One of the important components of diagnostics is vibration control, as it allows detecting a large number of mechanical defects and defects in electrical or magnetic parts of electrical equipment. Vibration control, as a means of malfunctions diagnosis and ensuring the stable operation of electrical equipment, is most often carried out by contact sensors. The paper describes the experimentally tested vibration diagnostics system for an electric motor, which is based on remote ultrasonic measurements together with contact measurements. It is shown that remote measurements allow controlling moving elements and having more capabilities than contact ones. A significant difference between vibration signals obtained by different methods was found: using traditional contact sensors installed on the engine body and using active ultrasonic sensing of rotating elements. A comparative analysis of information obtained from contact and noncontact sensors is proposed for the diagnostics of electrical equipment. The analysis was carried out both in starting and steady state operation modes of the electric motor. The joint use of contact and remote measurements significantly increases the informative value and data reliability of technical condition forecasts.

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7

Rusin, A. Y. "TIME REDUCTION TESTS OF RELIABILITY ELECTRICAL EQUIPMENT." Bulletin of the Tver State Technical University. Series «Building. Electrical engineering and chemical technology», no. 3 (2020): 60–68. http://dx.doi.org/10.46573/2658-7459-2020-3-60-68.

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It is noted that improving materials and technologies leads to increased reliability of electrical equipment. It is shown that аt the same time, the time for testing new equipment samples for reliability increases and the cost of carrying them out increases. Research results are given that can reduce the time of testing equipment for reliability.

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8

Giorgio, Massimiliano, Maurizio Guida, and Gianpaolo Pulcini. "Reliability-Growth Analysis of Locomotive Electrical Equipment." Journal of Quality Technology 38, no. 1 (January 2006): 14–30. http://dx.doi.org/10.1080/00224065.2006.11918581.

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9

Sabitov, L. S., A. E. Aukhadeyev, R. G. Idiyatullin, R. S. Litvinenko, L. N. Kisneeva, A. N. Khusnutdinov, and O. V. Ilyushin. "Reliability study for traction electrical equipment of urban electric transport." IOP Conference Series: Materials Science and Engineering 915 (September 16, 2020): 012048. http://dx.doi.org/10.1088/1757-899x/915/1/012048.

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10

Kudryashev, Gennadiy, Aleksandr Tret’yakov, and Oksana Shpak. "The Impact of Electricity Losses on the Reliability of Electrical Equipment in the Rural Power Grid of 0.4 kV." Elektrotekhnologii i elektrooborudovanie v APK 1, no. 42 (January 2021): 34–38. http://dx.doi.org/10.22314/2658-4859-2021-68-1-34-38.

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Rural networks are characterized by a large length and low load density. In the country, there are problems with the reliability of electricity supply to agricultural enterprises and the uninterrupted operation of electrical equipment. The average duration of consumer outages is up to 100 hours annually. In Western developed countries, it is statistically defined as an acceptable state of electricity supply, when for a medium- voltage network during the year, the total duration of interruptions is in the range of 15-60 minutes per year. The permanent functioning of the Russian agro-industrial complex is impossible without reliable and stable operation of rural electric distribution networks. (Research purpose) The research purpose is in studying the impact of electricity losses on the reliability of electrical equipment in the rural power grid of 0.4 kilovolt. (Materials and methods) The methods of ensuring reliability include: design features of the system, reliability of electrical equipment; provision of backup power, system management tools, organization of operation. The reasons for the decrease in reliability were: equipment failures, errors of operating personnel, excess of resource capabilities, deviation of the actual operating conditions of the equipment from the calculated ones. (Results and discussion) The article considers the issues of additional electricity losses in the low- voltage network of 0.4 kilovolts on the example of the power supply of an agricultural enterprise, caused by the flow of reactive energy. The article presents graphs of phase voltages and power consumption. Authors conducted experimental studies in a network of 0.4 kilovolts. The article presents the calculated reliability indicators of electrical equipment at an agricultural enterprise. The increase in reliability when installing a compensating device in the 0.4 kilovolt network are described. (Conclusions) The increase of reliability of electrical equipment is revealed, the probability of failure operation of the electric motors decreased by 3 percent; the probability of failure operation of the electric motors decreased by 19 percent; reducing the failure rate by 15 percent; decrease in failure rates by 14 percent.

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11

Gellings, Clark W., Tom Stickels, Dick Cromie, Sioe Mak, Bernard F. Hastings, Gary Fernstrom, Frank Hyde, and Lawrence C. Markel. "Load Management Equipment Reliability." IEEE Power Engineering Review PER-5, no. 10 (October 1985): 25. http://dx.doi.org/10.1109/mper.1985.5528675.

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12

Litvinenko, Ruslan S., Aver E. Auhadeev, Khak T. Le, and Gamal R. Akhsaniev. "Calculation integral reliability indicator of the urban electric transport traction electrical equipment." Transportation Systems and Technology 7, no. 1 (March 31, 2021): 71–84. http://dx.doi.org/10.17816/transsyst20217171-84.

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When reliability requirements at the stage of developing complex technical systems are setting, the total number of individual and complex reliability indicators set in accordance with regulatory documents is within 5-7 units. This is done provided that they are recoverable, and also for them the requirements for durability and preservation are determined. All this determines the complexity of the procedure for their verification, confirmation and evaluation. Aim: Formation of a common (integral) indicator of reliability, which can characterize the basic reliability properties multitude of traction electrical equipment, as a complex technical system, subject to the compliance of individual indicators with the requirements specified in the terms of reference. Methods: It is proposed to use of T. Saati's hierarchy analysis method, which is widely used in solving various multicriteria problems. Conclusion: Using an integral indicator to determine the level of reliability allows getting a formalized result, expressed through the vectors of global priorities corresponding value, which makes it possible to get a quantitative assessment of the superiority for one of alternative traction electrical equipment.

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13

Koval, D. O. "Transmission equipment reliability data from Canadian Electrical Association." IEEE Transactions on Industry Applications 32, no. 6 (1996): 1431–39. http://dx.doi.org/10.1109/28.556649.

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14

Zhang, Ji Hong, and Da Wei An. "Study on Application of Insulating Materials in Electrical (Electronic) Equipment." Advanced Materials Research 834-836 (October 2013): 133–37. http://dx.doi.org/10.4028/www.scientific.net/amr.834-836.133.

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Various types of insulating materials in electrical equipment is not only widely used, but also play a crucial role to enhance the insulation of electrical equipment performance and to improve the quality of electrical equipment. Different devices require different types of electrical insulating materials reliability,and in order to improve the safety factor of electrical equipment, it is necessary to strengthen the study on reliability of electrical insulating materials.

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15

Wang, Feng, Jing Shi, Liu Jun, Rui Zhang, and Hao Tian. "Advanced Progress in Diagnosing the Reliability of Electrical Equipments by Infrared Thermography." Applied Mechanics and Materials 672-674 (October 2014): 1433–36. http://dx.doi.org/10.4028/www.scientific.net/amm.672-674.1433.

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Infrared thermography was obtained more attention and accepted as an effective method in electrical preventive maintenance in account of high precision and sensitivity image features. This review elaborates the application of infrared thermography for diagnosing electrical equipment, both of the thermal anomalies and methods of measurement. Developments of the inspection techniques are remarkable for purpose of investigate the reliability of electrical equipments due to the effect of the environmental factors and equipment condition. Due to the complex analysis, various automatic diagnostic systems are proposed for faster and more accurate detection. Recent technologies of typical engineering solutions are introduced to raise the level of infrared thermography inspection.

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16

Romanov, Vladimir, and Valery Goldstein. "Improving the Reliability of Electrical Engineering Complex of Submersible Electric Equipment of Oil Production Based on the Analysis of its Emergency." Electrotechnical Systems and Complexes, no. 3(40) (September 25, 2018): 20–26. http://dx.doi.org/10.18503/2311-8318-2018-3(40)-20-26.

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17

Nepomnyaschiy, V., J. Gerhards, A. Mahnitko, and T. Lomane. "Reliability of Latvian Power System’S 330 KV Substations." Latvian Journal of Physics and Technical Sciences 51, no. 3 (June 1, 2014): 15–23. http://dx.doi.org/10.2478/lpts-2014-0016.

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Abstract Substation reliability is always a topical problem. The authors consider the techniques for reliability calculation based on logical-probabilistic approach to the evaluation of electrical substation switchgear schemes and equipment at emergency situations with disconnections of individual elements of the substation equipment or false operation of relay protection and automation devices. Based on the reliability analysis made for the 330kV substations of Latvian Electric Power System, recommendations are given concerning the reconstruction of switchgear schemes for some substations

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18

Hruzevych, A. V., and V. V. Shvets. "Improving the reliability of power complex equipment by electric arc spraying." Paton Welding Journal 2021, no. 10 (October 28, 2021): 38–46. http://dx.doi.org/10.37434/tpwj2021.10.06.

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19

Ferreira Brandao, A. "Reliability Reduction in Electrical Installations Due to Equipment Overload." IEEE Latin America Transactions 6, no. 1 (March 2008): 74–80. http://dx.doi.org/10.1109/tla.2008.4461635.

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20

Chen, Tang, Sun, Zhou, Wang, and Mao. "Reliability Evaluation Method Considering Demand Response (DR) of Household Electrical Equipment in Distribution Networks." Processes 7, no. 11 (November 3, 2019): 799. http://dx.doi.org/10.3390/pr7110799.

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The load characteristic of typical household electrical equipment is elaborately analyzed. Considering the electric vehicles’ (EVs’) charging behavior and air conditioning’s thermodynamic property, an electricity price-based demand response (DR) model and an incentive-based DR model for two kinds of typical high-power electrical equipment are proposed to obtain the load curve considering two different kinds of DR mechanisms. Afterwards, a load shedding strategy is introduced to improve the traditional reliability evaluation method for distribution networks, with the capacity constraints of tie lines taken into account. Subsequently, a reliability calculation method of distribution networks considering the shortage of power supply capacity and outages is presented. Finally, the Monte Carlo method is employed to calculate the reliability index of distribution networks with different load levels, and the impacts of different DR strategies on the reliability of distribution networks are analyzed. The results show that both DR strategies can improve the distribution system reliability.

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21

Bodrug, N. S., and O. V. Skripko. "Practical Aspects of Modernization of Electrical Equipment of the Substation." Journal of Physics: Conference Series 2096, no. 1 (November 1, 2021): 012025. http://dx.doi.org/10.1088/1742-6596/2096/1/012025.

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Abstract Currently, one of the important problems for domestic energy is the replacement of an outdated fleet of equipment at substations of electric power systems (EPS). The paper addressed the issue of upgrading the "Ice" substation in part of the selection of switches, checking the reliability of switches and the reliability of the substation in general. The substation characteristic is given, the changes in the main scheme of the substation electrical connections are substantiated, switches for all substation voltages are selected according to the current short circuit currents. To assess the degree of reliability of the selected switches, the substation is determined by their probability of refusal. Based on the assessment of the likelihood of failures and other equipment for the substation, the estimated time of trouble-free operation was determined, the average time of trouble-free operation and the average substation recovery time.

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22

Shevchuk, M. Ya, I. V. Hlad, Ya V. Batsala, and O. I. Kiianiuk. "IMPROVING EFFICIENCY OF ELECTRICAL EQUIPMENT FOR ROAD TRANSPORT." METHODS AND DEVICES OF QUALITY CONTROL, no. 2(43) (December 24, 2019): 59–67. http://dx.doi.org/10.31471/1993-9981-2019-2(43)-59-67.

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This paper presents the reasons for the increased level of automobile accumulators are given, the design of the start-charging device of increased reliability is considered. The most damaged nodes of the system of electrical equipment of motor vehicles are listed, the differentiation of elements from the standpoint of their structural reliability is shown, ways of increasing the reliability of the elements of the electrical equipment system are determined. It is shown that the main reasons for finding optimal modes of operation of vehicles electrical equipment are the economic factor, the impact on the environment, the need to reduce the dependence on the constant rise in price of petroleum products. Car lead acid batteries are starter batteries, that is, they do not involve deep discharge. As a result of the deep discharge of the battery on its plates, the phenomenon of sulfitation and shedding of the active mass. The longer the battery is discharged, the more active it becomes and the starter current decreases. Therefore, the issue of regular recharging of the battery and guaranteed starting of the internal combustion engine with a discharged battery is urgent. It is established that the causes of rapid discharge of the battery or reduction of its capacity may be the deviation of the electrolyte density from the recommended value, the sulfation of the plates and the shedding of their active mass, malfunction of the vehicle electrical equipment. Most serial chargers are not designed for starting a car engine, and specially designed models have a high price. The complexity and considerable volume of work on researching and predicting the reliability of the car electrical system requires the efforts of specialists, as well as the coordination and coordination of their activities by developing methodological recommendations first to address partial and then general issues of the problem. It is shown that quantitative indicators of the reliability of each element included in the system are of great importance when addressing issues related to the organization of maintenance, the establishment of overhaul terms and repair volumes of the car electrical system. The developed charger will reduce the time spent on starting the car engine during the cold period, as well as significantly increase the battery life due to its full charge.

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23

Boboev, Kh D., Yu I. Averyanov, A. V. Bogdanov, and I. L. Kravchuk. "ISOLATION CONTROL IN THE “TARROR” QUARRY DISTRIBUTION NETWORK." Bulletin of the South Ural State University series "Power Engineering" 21, no. 4 (2021): 57–65. http://dx.doi.org/10.14529/power210407.

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The reliability and operation safety of electrical equipment, as well as the level of electrical and fire safety at mining enterprises are directly related to the state of electrical networks insulation, and particularly the value of the total insulation resistance relative to the ground. Controlling these parameters in the electrical equipment operation allows increasing the efficiency and reliability of such equipment. The paper concentrates on the current problem of selecting methods to monitor the isolation parameters of the network phases relative to the ground in the distribution electric networks with an isolated neutral. It briefly describes “Zeravshan” joint venture, the isolation control system developed for it and the results of its computer model based operability tests. Studies have shown that at rated load in the network, the error in determining the total insulation resistance is under 20%, which proves the operability of the proposed network phase isolation monitoring system relative to the ground. Thus, the implementation of the developed insulation parameter monitoring system in distribution networks operation will improve the reliability and safety of power supply.

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24

Feng, Fu Zhou, Wei Xing, Ai Wei Si, and Guang Ping Wu. "Reliability Assessment for a Certain Diesel Engine Based on Performance Degradation Data." Advanced Materials Research 199-200 (February 2011): 481–86. http://dx.doi.org/10.4028/www.scientific.net/amr.199-200.481.

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Reliability of equipment has long been considered as an important quality characteristic. Traditional methods of equipment reliability assessment are based on lifetime data. With equipment being much more reliable and the growing need for developing new equipments within shorter period and at lower cost, we can hardly get enough lifetime data in many cases. Performance degradation data can also be used for reliability assessment. This paper is mainly researched on reliability of a certain diesel engine. Through analyzing the failure mode and failure mechanism, performance degradation parameters of the diesel engine is selected as compression pressure in a cylinder while driven by an electrical motor. Based on a long time accumulation on performance degradation data, two methods of degradation path fitting and degradation value distribution are tried in this paper to evaluate reliability of the diesel engine. Besides, the regulation of the reliability variation is given by the results of the assessment.

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25

Shpiganovich, A. N., A. A. Shpiganovich, V. I. Zatsepina, and E. P. Zatsepin. "STATE OF THE ISSUE OF THE POWER SUPPLY SYSTEM'S RELIABILITY." Mining science and technology, no. 3 (February 28, 2018): 47–79. http://dx.doi.org/10.17073/2500-0632-2017-3-47-73.

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The electric power system of the Russian Federation was most developed in the 80-90s of the last century, after which there was an almost twofold decline in the generation and transmission of electrical energy in the system with subsequent growth. The main problem of fuel and energy complexes is the progressive aging of fixed production assets in conditions of increasing energy consumption requirements, which is a source of increased risk of major accidents. In this case, negative disturbances can arise both in the system itself and be external to it and can lead not only to a low quality of electrical energy but also to interruptions in power supply. The studies carried out to date are devoted to a quantitative assessment of the reliability of power supply systems and their equipment and do not take into account the effects of electrical equipment failures on the characteristics of production processes and the operation of technological machines. To consider the reliability of power supply systems in isolation from the operation of other systems (technological, relay protection, automation, ventilation, dewatering, etc.) means not to use the whole range of measures aimed at improving the reliability of electricity supply, as a result it is impossible to ensure the optimum level of reliability of electricity supply. Reliability of the power supply system must be evaluated taking into account the interaction of electrical equipment with the equipment of all production systems. The problem of increasing the efficiency of the functioning of industrial enterprises by optimizing the parameters of the reliability of power supply systems is topical and of great economic importance.

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26

Dulskiy, E., V. Kruchek, and P. Kolpahchyan. "Comparative experimental studies of the main electrical parameters of electrical equipment insulation after drying by various methods." Journal of Physics: Conference Series 2131, no. 4 (December 1, 2021): 042076. http://dx.doi.org/10.1088/1742-6596/2131/4/042076.

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Abstract The article is devoted to the assessment of the comparative experimental studies’ results of various technologies for drying impregnated insulation of power electrical equipment in the process of manufacturing and repair: standard technology, which provides for convective drying using high-power electric ovens, and the proposed technology and methods for accelerated drying in hardware complexes using infrared (IR) radiation. In particular, the article presents the results of the polymer insulation surface microstructure analysis after drying by the indicated methods. The research was carried out in an industrial environment, using specialized certified equipment. In theoretical terms, the article presents the calculations on the rationale for the use of IR radiation during drying of a multilayer insulating structure of various compositions. The studies carried out confirm the hypothesis about the formation of microcavities on the surface and in the thickness of the polymer insulation when using convection during drying, which reduce the quality and reliability of the electrical equipment insulation as a whole. At the same time, the proposed technology and technique for accelerated drying of electrical equipment insulation using IR-radiation gives an opportunity to improve the quality of the resulting polymer insulation, increasing its reliability. In addition, this technology can significantly increase the productivity of insulation repair and reduce energy costs.

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27

Okunev, Alexander V., Anastasia A. Ivanova, and Alexander A. Philipiev. "Assessment of performance reliability of transformers." Innotrans, no. 3 (2020): 50–53. http://dx.doi.org/10.20291/2311-164x-2020-3-50-53.

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Increase of freight traffic resulted in increased loads on traction substations and, respectively, in increase of their equipment failure risks. In the context of maintaining the required voltage level and power quality, which determine appropriate values in reliability for traction substation transformers, the article looks upon solving the problem of determination of reliability essential parameters. A proposed calculation model makes it possible to simplify the choice of electrical apparatus for uninterrupted power supply of electric rolling stock traction.

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Darian, Leonid, and Leonid Kontorovych. "Electrical power equipment digital twins. Basic principles and technical requirements." E3S Web of Conferences 288 (2021): 01029. http://dx.doi.org/10.1051/e3sconf/202128801029.

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The increasing complexity of the problems of asset management and ensuring the operational reliability of electric power equipment, which have to be taken into account by specialists at all stages of the life cycle, leads to the need to develop and implement digital twins. Based on the analysis of these problems, this work describes principles and technical requirements for the development of digital twins of electrical power equipment. The basic principles of developing the architecture of digital twins in the form of images, examinations, and functions of their components are stated. The general technical requirements for digital twins of electric power equipment are proposed. The functions of digital twin users at all stages of the life cycle of electric power equipment are given.

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29

Soljačić, V., and M. Kosić. "Reliability diagnostics of electronic equipment." Measurement 8, no. 3 (July 1990): 141–44. http://dx.doi.org/10.1016/0263-2241(90)90057-d.

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30

Vorzhev, Vladimir, Nikolay Rudenko, Pavel Malko, and Vladimir Dergousov. "Increasing the reliability of electrical equipment in the agricultural and industrial complex based on measuring the electrical capacitance of capacitors." E3S Web of Conferences 273 (2021): 07029. http://dx.doi.org/10.1051/e3sconf/202127307029.

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The article presents elaborated technical suggestions for increasing reliability of electrical equipment of agro-industrial complexes. The analysis of the already known ways of measuring electric capacitance is carried out and it demonstrates the necessity of withdrawing a capacitor from a working circuit for sufficient accuracy of determining electric capacitance. The urgency of developing a method for measuring electric capacitance without removing the capacitor from а working circuit to reduce the average recovery time is shown. Theoretical foundation of the possibility to measure electric capacitance without a capacitor being withdrawn from a working circuit in smoothing filter mode is worked out; a structural electric circuit of an electric capacitance measuring device is elaborated and the principle of its operation is described; methods of measurement by means of the given device are elaborated; conditions for creating and maintaining the measurement mode of the device are substantiated. The validity of the received results is checked with the help of the programmed package Mathcad, as well as on electric models of the main blocks of the device. The obtained results can be used to measure electric capacitance of electrolytic capacitors during maintenance and electrical equipment renovation and also can promote its reliability.

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31

Yongjie, Luo. "Research on the Reliability Testing of Electrical Automation Control Equipment." SHS Web of Conferences 7 (2014): 01010. http://dx.doi.org/10.1051/shsconf/20140701010.

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32

Smelkov, G. I., G. V. Bokov, V. A. Pekhotikov, and A. I. Ryabikov. "Fire Risk Assessment in the Technological Equipment with Electric Heaters." Occupational Safety in Industry, no. 2 (February 2022): 88–93. http://dx.doi.org/10.24000/0409-2961-2022-2-88-93.

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An important role in the field of fire prevention of the electrical installations, including electrical heating equipment, is played by the research and development of the risk-based engineering methods for assessing fire safety of the objects. It is also important to find economically sound ways to ensure it. Widespread use of the electrical heating equipment in the technological processes and a significant number of fires from heaters require a fire risk assessment considering power supply and technological process control systems. Current requirements for determining fire risk of the electrical heating equipment are not effective enough. According to the statistics, the electric heaters occupy one of the first places among the electrical equipment as a cause of fires. The article describes a methodology for assessing the probability of fire hazard modes during the operation of electrical heating equipment. Events that contribute to the occurrence of a fire are considered. The most characteristic factors that cause the ignition of electrical elements of the electric heating equipment system are listed. A tree of events leading to the fire occurrence in such systems is presented. Specific features are noted concerning thermal processes in the electrical part of the equipment associated with the possibility of ignition in the electrical elements. Analytical expressions for determining the probability of fire and its components are given. Calculation is based on the reliability indicators of the system and devices elements for protective shutdown of the circuits with fire hazardous modes. The possibility is shown related to practical application of the above methodology for assessing fire risk in the equipment with electric heaters. This methodology also allows to justify the need or sufficiency of fire-fighting technical solutions.

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Fedorіv, M. Y., I. D. Halushchak, and P. О. Kurliak. "The reliability increase of the electric drives for pumping units." Prospecting and Development of Oil and Gas Fields, no. 2(67) (June 5, 2018): 47–52. http://dx.doi.org/10.31471/1993-9973-2018-2(67)-47-52.

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Improving the quality and reliability of electrical machines is one of the most urgent problems of modern electrical engineering. Practical data show that the increase of service life and reliability of machines gives better results than the improvement of other technical and economic indicators: efficiency, power factor, utilization factor. The quantitative indicators of reliability can be best determined by the results of statistical processing of the information obtained when using the products. An algorithm of the load balancing based on the actual performance of pumping equipment and temporary changes in the connected load via the emergency shutdown of the pumps has been developed to improve the reliability operation and reduce inefficient energy losses. The main advantage of the proposed method is the analytical design models of optimization, which does not require numerical methods and iterative procedures. Such principles as active-preventative service and increasing personal responsibility for its quality and timeliness should be the basis for the organization of workposts service. Progressive forms of service are the technical re-equipment, modernization of equipment and improvement of production organization, as well as complex methods of the electric drive maintenance and application of the system of standardized tasks.

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Ishikawa, Masahiro, Susumu Horiuchi, Syunichi Hirose, Takami Sakai, and Tsuneo Horiuchi. "HVDC Transmission Control Equipment with High Reliability." IEEE Power Engineering Review PER-6, no. 4 (April 1986): 52. http://dx.doi.org/10.1109/mper.1986.5527736.

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35

Jeong, Min-Chang, and Jaehyuck Kim. "Prediction and Analysis of Electrical Accidents and Risk Due to Climate Change." International Journal of Environmental Research and Public Health 16, no. 16 (August 20, 2019): 2984. http://dx.doi.org/10.3390/ijerph16162984.

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The industrial development and the increase in the use of fossil fuels have been accelerating global warming and climate change, thereby causing more frequent and intense natural disasters than ever before. Since electrical facilities are generally installed outdoors, they are greatly affected by natural disasters, thus accidents related to electrical equipment has been on the rise. In this paper, we present the risk rating associated with climate change by analyzing the statistics of electrical fires, electric shock accidents and electrical equipment accidents caused by domestic climate change. Further, we present a risk rating analysis model for electrical fires on a monthly basis through the data analysis of electrical hazards associated with various regional (metropolitan city) climatic conditions (temperature, humidity), and analyze the accident risk rating for natural disasters related to low and high voltage equipment. Through this risk analysis model for each region and type of equipment, we presented a basic prediction model for electrical hazards. Therefore, it is possible to provide electrical safety services in the future by displaying a risk prediction map of electrical hazards for each region and type of electrical equipment through web sites or smart phone apps using the presented analysis data. Further, efforts should be made to increase the robustness or reliability of electrical equipment in order to prevent electrical accidents caused by natural disasters due to climate change in advance.

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Lysenko, D. A., V. Yu Konyukhov, and N. P. Astashkov. "Implementation of the control algorithm of the traction electric equipment." Journal of Physics: Conference Series 2061, no. 1 (October 1, 2021): 012135. http://dx.doi.org/10.1088/1742-6596/2061/1/012135.

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Abstract Currently, in various fields of science and technology, there is a fairly large number of methods for predicting reliability indicators, which differ in the set of tasks to be solved and the features of the mathematical apparatus used. When developing a methodology for calculating the reliability of an electric machine, one of the main stages is the development of a mathematical model, in which it is possible to take into account the factors, the impact of which directly affects the technical condition and the level of operational safety. Taking into account the disturbing influences during the implementation of the technological process is possible provided that the means of automation are used. The performed analysis of statistical data on traction motor failures made it possible to substantiate the advisability of warming up, since a significant number of electrical part failures occur in the autumn - winter - spring periods of time. This feature of the distribution of failures is to a certain extent due to the direct wetting of the insulation and a decrease in its dielectric strength. This process is associated with a sharp drop in external and internal temperatures when placing the locomotive at the depot, which contributes to the appearance of condensate on the insulation, its further destruction. The measure proposed in the article for warming up traction electrical equipment is aimed at an integer reduction in the failures of the electrical part of the electric motors under consideration.

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37

Erhan, Fiodor, and Dinu Voinesco. "Assessing the Influence of Asymmetric Modes on the Reliability Indicators of Distribution Systems." National Interagency Scientific and Technical Collection of Works. Design, Production and Exploitation of Agricultural Machines, no. 51 (2021): 88–94. http://dx.doi.org/10.32515/2414-3820.2021.51.88-94.

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The power electric distribution systems (PEDS) possess a great dynamics of development. Thanks to this phenomenon in the power electric distribution systems (PEDS) the probability of apparatus of asymmetrical regimes increase monotonously. As a result of this reliability of the functioning of the power electric equipment installed in the electric knots changes. The asymmetrical regimes in the power electric distribution systems (PEDS) accompanied by the short circuit current are a function of a row determinate is a vague factor of probabilistic nature. Coming from it follows that the investigation of the influence of the asymmetrical regimes accompanied by the current of the short circuit on the reliability of the Power Electric Distribution Systems (PEDS) is one of the most important problems of the development the Power Electric Distribution Systems. The short circuit currents influence the structural and functional reliability of distribution networks and at the reliability of electrical equipment installation. The dynamics of changes in the levels of short circuit currents in electrical networks depends on the rate of change of the re-recovering voltage at the short circuit point on the power supply side and on the load side, as well as on the magnitude and rate of power change at the short circuit point on the power source side and on the load side.

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38

Topolsky, N. G., E. N. Mineev, G. N. Malashenkov, M. Sh Mintcaev, and D. S. Beresnev. "The use of differential leakage current transformers in an automated fire prevention system in the power grid of industrial facilities." Technology of technosphere safety 94 (2021): 20–33. http://dx.doi.org/10.25257/tts.2021.4.94.20-33.

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Introduction. The occurrence of severe consequences of accidents in the electrical networks of industrial facilities depends on how correctly the automated systems for protection, detection and extinguishing of fire are selected. One of the reasons for the occurrence of a fire hazardous situation in electrical networks is the violation of the insulation and sheath of the electrical cable due to its aging or mechanical damage. Timely detection of the pre-fire state of electrical equipment is ensured by using an automated control system for electrical equipment using a differential leakage current transformer (DLCT). The automated control system for electrical equipment using a differential leakage current transformer is designed for early detection of the location of current leakage in the protected power and (or) lighting group (the electric motor and the power cable supplying it and other parts of the electrical equipment) and the issuance of information to the post with permanent duty personnel. Targets and goals. Improving fire safety of industrial facilities by using an automated control system for electrical equipment using a differential leakage current transformer. Methods. To obtain the results, general scientific and special methods of scientific knowledge were used: analysis, synthesis, generalization, which were based on the provisions of the theory of probability and the theory of reliability. Research results. It is proposed to use DLCT for the protection of high-current electrical receivers in various sections of networks, taking into account selectivity as part of an automated fire prevention system. Conclusions. The use of an automated control system for electrical equipment upon detection of leakage currents makes it possible to: - timely detection of the place of occurrence of leakage currents, detection of the pre-fire condition of electrical cables by leakage currents; - transmission of information about the state of electrical cables to a higher level of the automated control system for electrical equipment; - disconnection of the cable line from power sources and power consumers on command from a programmable controller; - preventing the spread of fire along the cable route and along adjacent structural elements, enclosing structures and technological units; - activation of executive devices by the operator in an automated mode. Key words: accident, analysis, fire, explosion, risk, statistics, reliability, electrical equipment.

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39

Sukhachev, Ilya, Sergei Sidorov, Valery Sushkov, and Victoria Antropova. "DEVELOPMENT OF A MODEL FOR FORECASTING THE TECHNICAL CONDITION OF OILFIELD POWER-MECHANICAL EQUIPMENT USING AN ARTIFICIAL NEURAL NETWORK." Electrical and data processing facilities and systems 18, no. 1 (2022): 88–94. http://dx.doi.org/10.17122/1999-5458-2022-18-1-88-94.

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Relevance The work is devoted to the development of a system for predicting the technical condition of oilfield power-mechanical equipment, in particular the installation of an electric centrifugal pump, as a way to solve the problem of failure of electrical equipment associated with the exhaustion of its resource. Aims of research Improving the reliability of oilfield power-mechanical equipment by predicting the technical condition of the installation of an electric centrifugal pump in the current operating conditions. Research methods To determine the technical condition of the installation of an electric centrifugal pump, artificial neural network methods and computer applications were used. Results A method for implementing an artificial neural network is presented, which makes it possible to predict a change in the technical state of electrical equipment during further operation under current conditions. A schedule for predicting the technical condition of the ESP has been obtained.

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40

Evdokimov, Sergey A., Olga I. Karandaeva, and Yulia N. Kondrashova. "Calculation Methodology Determining Reliability of the Thermal Power Station Electrical Facilities." Applied Mechanics and Materials 698 (December 2014): 796–802. http://dx.doi.org/10.4028/www.scientific.net/amm.698.796.

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It is noticed that introduction of frequency convertors has an adverse effect on the reliability indexes of the critical equipment of the thermal power station. The paper considers the method for calculation reliability based on the logical-and-probabilistic method with the following expert estimation of the entity technical state. Examples of the developed structural models of the power station’s reliability and its separate units as fault trees are provided. Based on the results of expert evaluation of the equipment fault occurrence intervals before and after introduction of the frequency convertors, average times to failure have been calculated. The paper also gives recommendations for providing reliability of the essential auxiliaries’ electric drives at the introduction of the frequency convertors.

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41

Du, Shi Bin, Guan Yu Tian, Shu Zhong Bai, and Lan Tian. "An ICA-Based Audio Feature Fault Detection Method for Transformer Equipments." Advanced Materials Research 805-806 (September 2013): 706–11. http://dx.doi.org/10.4028/www.scientific.net/amr.805-806.706.

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Experienced engineers in transformer substation can judge the equipment condition via just listening to the working sounds of electrical equipments. Use audio signal processing applied in engines and other mechanical equipments for reference. A scheme to monitor the working condition of electrical equipments is proposed. Firstly, the basic principles and system structure of this scheme is outlined. It introduces the method of colleting electrical equipments working sounds by Microphone array, because Microphone array form a beam to target the source sound, which can reduce the noise and reverberation. When substation is working, the environmental background interference sounds exist and are independent from electrical working sound. So we can use FastICA algorithm that is based on the largest negentropy to separate the collected sound to several independent source signals. It has the advantage of fast convergence and robust. The simulation result shows this algorithm can effectively separate the multiple independent source signals. The separation accuracy is above 95% for typical sample mixed sounds and the reliability of electrical equipment fault detection system based on audio signal processing is ensured.

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42

Plich, Mieczysław, Mieczysław Dziubiński, and Krzysztof Stypułkowski. "Influence of Changes in Electrical and Electronic Equipment on the Increase of Reliability in Vehicles." Journal of KONBiN 37, no. 1 (July 1, 2016): 297–318. http://dx.doi.org/10.1515/jok-2016-0014.

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Abstract The article presents considerations for improving the reliability of means of transport after introducing significant structural changes in the installation of vehicles and functioning of the embedded electrical equipment. The consequence of introducing electrical and electronic equipment to vehicles is an increased demand for energy. Uncontrolled consumption of electricity can lead to significant decline in availability. Therefore, the necessity arises of energy management through an additional function of some electrical equipment and implementation of modern design and technology according to the requirements of safety and environmental protection.

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Khalyasmaa, A. I., S. A. Eroshenko, D. V. Shatunova, A. A. Larionova, and A. O. Egorov. "Digital twin technology as an instrument for increasing electrical equipment reliability." IOP Conference Series: Materials Science and Engineering 836 (May 7, 2020): 012005. http://dx.doi.org/10.1088/1757-899x/836/1/012005.

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44

Matusevych, Oleksandr, Valeriy Kuznetsov, and Viktor SYCHENKO. "The method for increasing the efficiency of equipment’s maintenance in railway traction power supply systems." Archives of Transport 47, no. 3 (September 30, 2018): 39–47. http://dx.doi.org/10.5604/01.3001.0012.6506.

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Purpose. To develop the method for increasing the efficiency of the equipment’s maintenance and repair system, ensuring necessary level of operational reliability of the equipment, safety and reliability of the electric equipment with minimal expenses on operation. Relevance. Aging of the power equipment in railway power supply systems sharply raised a need for assessment of its states and degree of risk for operation outside rated service life. In critical conditions of technological processes and operational modes of the railways it is necessary to increase the equipment’s operational reliability. The scheduled maintenance and repair system whose main technical and economic criterion is the minimum of equipment’s downtimes on the basis of a rigid regulation of repair cycles, in the conditions of market regulations in the field of repair in many cases does not provide the optimal decisions due to insufficient financing. The solution of this problem is possible by improvement of the maintenance and repair system. Under these conditions the main direction for supporting the operational reliability of power electric equipment on TS is a development of the modern methods based on individual supervision over real changes of technical condition of power equipment. Scientific novelty. In this article the authors proposed an integrated approach, on the basis of which can be developed the effective maintenance and repair system for traction power supply systems. Proposed approach allowed to react quickly to changes of service conditions on traction substations, to control the technical condition of power electric equipment under the conditions of uncertainty, to establish interrelation between quality of service and operational reliability of the equipment, to choose a service strategy on traction substations. Practical importance. The validity of the developed method was confirmed by the results of calculations and practically by choosing the optimal maintenance's option for transformer TDTN-25000/150-70 U1 (ТДТН-25000/150-70 У1) on traction power supply substation.

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Naumov, I. V., and M. N. Polkovskaya. "On the Rural Electric Networks Reliability Level Issue." Journal of Physics: Conference Series 2096, no. 1 (November 1, 2021): 012180. http://dx.doi.org/10.1088/1742-6596/2096/1/012180.

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Abstract The structure study, condition and 10 kV electric networks reliability level in the Irkutsk region for the period from 2016 to 2020 is carried out. The analysis is based on real data on the studied electric networks published in the open press. The Interactive Matlab system libraries and interfaces were used to calculate and analyze the studied indicator. The considered electric networks structure has investigated, algorithms and computer programs for the Matlab graphic editor are compiled with the help which changes time diagrams in the failures number, the interruptions time and the under-output electricity amount for each year months are constructed. The year months in which the highest damage occurs were determined. The electrical networks wear is considered, as well as the repair plan implementation for the main equipment. The reliability level according to the established indicators has analyzed, the main reasons for equipment failure are considered. The characteristics of improving considered electrical networks functioning are presented. Based on the conducted studies, it was found that the most damaged the considered overhead lines elements are: wires, supports, insulators, and switching devices. The characteristic reasons that lead to their damage are: wind load, damage to switching devices. The greatest damage is the Angarsky and Irkutsky branches networks characteristic (the average annual value all failures are 26.4 and 23.9%). The Kirensky and Cheremkhovsky branches networks are the least damaged annually. The obtained data probabilistic-statistical and correlation analysis, as well as the emergency outages risks analysis for the future, taking into account the seasonal component, is carried out.

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Topolsky, N. G., E. A. Meshalkin, E. N. Mineev, Nguyen Le Duy, and D. S. Beresnev. "Probabilistic model of functioning of an automated control system for electrical equipment of industrial enterprises in Vietnam in the event of an accident." Technology of technosphere safety 93 (2021): 199–207. http://dx.doi.org/10.25257/tts.2021.3.93.199-207.

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Introduction. Ensuring fire safety of industrial facilities depends on how correctly the automated systems for detecting and extinguishing a fire are selected, how quickly and efficiently the necessary preventive measures are taken to minimize the likelihood of a fire and damage from it. Assessment of the degree of risk of injury to people and damage caused by accidents is associated with the task of predicting the indicators of reliability and residual life of a functioning system. The most important issue is the establishment of the permissible periods for the further operation of residual current devices at a specific value of the risk of an accident. One of the features of industrial facilities is the presence of a large number of electrical equipment that creates the risk of major accidents accompanied by fires and explosions. Timely detection of the pre-fire state of electrical equipment is ensured through the use and development of an automated control system for electrical equipment. Goals and objectives. Assessment of the degree of risk of injury to people and damage to them in case of accidents when predicting reliability indicators in an automated control system for electrical equipment. Methods. To obtain the results, general scientific and special methods of scientific knowledge were used: analysis, synthesis, generalization, which were based on the provisions of the theory of probability, the theory of reliability. Research results. An assessment of the occurrence of an emergency is carried out based on elementary statistics and discrete Poisson distribution. Conclusions. The use of an automated control system for electrical equipment upon detection of leakage currents allows increasing the level of fire safety of industrial enterprises, as well as determining the life cycle of residual current devices during its operation. Keywords: accident, analysis, fire, explosion, risk, statistics, reliability, electrical equipment

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Huang, Yang Qi, and Jian Hua Zhang. "Reliability Evaluation of Main Electrical Connection of Substation Based on Graph Theory." Applied Mechanics and Materials 527 (February 2014): 273–76. http://dx.doi.org/10.4028/www.scientific.net/amm.527.273.

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The main electrical connection of substation, consisting of transformers, bus bars, circuit breakers, isolating switches and other equipment connected with each other through cables, has an obvious characteristic in dots and lines, so graph theory is reasonable as the analysis method. Based on graph theory, the main electrical connection of substation is converted to the network model with nodes and branches. Connectivity between nodes on behalf of source points and load points is regarded as the reliability criterion, with the overload ability of transformer considered simultaneously. Non-sequential Monte Carlo is used to simulate the condition of equipment in the main electrical connection, along with the states of the system. The reliability of single-bus connection and sectionalized single-bus connection is calculated under given reliability criterion, and the results indicate the feasibility of graph theory method and correctness of the modified reliability criterion.

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Bakirov, I. K. "Investigation of the reliability level of electric cables for sustainable fire protection systems." IOP Conference Series: Earth and Environmental Science 981, no. 3 (February 1, 2022): 032036. http://dx.doi.org/10.1088/1755-1315/981/3/032036.

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Abstract According to statistics, electrical wiring is the most fire-dangerous type of electrical installations, as they account for about 44% of all fires related to electrical equipment and electrical devices. The relevance of the work is that the reliability of cables of fire protection systems directly affects the success of these systems in performing their functions in a fire, which directly affects the safety of people in a fire. The paper evaluates the stability of electric cables of fire protection systems for various methods of laying in conditions of fire exposure, and conducts field tests to assess the reliability of non-combustible electric cables with reduced smoke emission and increased fire resistance for the most popular methods of laying it. Also, a proposal has been developed to change the regulatory document in order to increase the stability of electrical cables of fire protection systems against fire hazards.

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Dhillon, B. S., and O. C. Anude. "Mining equipment reliability: A review." Microelectronics Reliability 32, no. 8 (August 1992): 1137–56. http://dx.doi.org/10.1016/0026-2714(92)90033-h.

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Yu, Hong Tao, Zhi Feng Zhang, Qing Quan Qiu, Qiang Sun, Guo Min Zhang, and Shao Tao Dai. "A Novel Thermoelectric Generator for the Detection of Electrical Equipment." Materials Science Forum 743-744 (January 2013): 105–10. http://dx.doi.org/10.4028/www.scientific.net/msf.743-744.105.

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Semiconductor thermoelectric generators have a series of advantages, such as compact volume, high-level reliability, and effective power generation in the presence of temperature difference. In many occasions, as a result of high voltage, electrical equipments can't be measured by the way of direct contact. In order to avoid equipment faults caused by low-voltage contact, a thermoelectric generator which uses waste heat of electrical equipments in service was designed. Electrical equipments often operate below 400K, and in this condition Bi2Te3 shows an outstanding performance of power generation. In order to solve the problems of little temperature difference and output power on steady-state, two methods were introduced. On the one hand, the temperature difference can be increased by filling with thermal insulation padding between the p-n junctions and using a heat sink in the cold side, and on the other hand, the output voltage and power will be augmented by increasing the number of p-n junctions. These methods have been proved effectively by simulation and experiment with promising outcomes.

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