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Artykuły w czasopismach na temat „High voltage insulating”

Autor: Grafiati

Data publikacji: 5 października 2024

Data aktualizacji: 31 lipca 2025

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1

Zhang, Guangquan, Xueqin Zhang, Bo Wang, Yujun Guo, Guoqiang Gao, and Guangning Wu. "Study on the Discharge Characteristics along the Surface and Charge Movement Characteristics of Insulating Media in an Airflow Environment." Energies 15, no. 10 (2022): 3706. http://dx.doi.org/10.3390/en15103706.

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The gas–solid interface of high-voltage insulating equipment is a weaker part of insulating equipment insulation, and preventing the occurrence of discharge along the surface of insulating equipment is a critical problem for high-voltage insulation. This article investigates the discharge characteristics and charge movement characteristics of insulating media under an airflow environment. The surface discharge characteristics of the insulating medium in the airflow environment were obtained by using a high-velocity airflow test platform, and the surface discharge voltage characteristics, disch

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2

Park, Herie, Dong-Young Lim, and Sungwoo Bae. "Surface Discharge Mechanism on Epoxy Resin in Electronegative Gases and Its Application." Applied Sciences 10, no. 19 (2020): 6673. http://dx.doi.org/10.3390/app10196673.

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This study presents the surface discharge characteristics of insulating gases, including sulfur hexafluoride (SF6), dry air, and N2, under a non-uniform field. Surface discharge experiments were conducted, with the gas pressure ranging from 0.1 to 0.6 MPa, on samples of epoxy dielectrics under an AC voltage. The experimental results showed that the surface insulation performance significantly improved in insulating gases possessing electronegative gases, such as SF6 and dry air. Surface flashover voltages of SF6 were saturated with an increasing pressure, compared to dry air and N2. The surfac

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3

Li, Chao, Lin Lin, and Weidong Qu. "Study on insulation performance optimization of EMU high-voltage equipment box." Journal of Physics: Conference Series 2195, no. 1 (2022): 012040. http://dx.doi.org/10.1088/1742-6596/2195/1/012040.

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Abstract The EMU high-voltage electrical equipment on the roof not only bears the erosion of various harsh and extreme environments, but also bears the impact of various over-voltage, and the insulation performance of the electrical equipment on the roof is seriously threatened. This paper studies the insulation optimization design method of EMU high-voltage electrical equipment, puts forward the method of adding a certain length of insulating sheath on the electrical equipment to improve the insulation performance of high-voltage equipment box, and tests the insulation optimization measures o

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4

Hayashi, Toshihiko, Toru Izumi, Tetsuro Hemmi, and Katsunori Asano. "Insulating Properties of Package for Ultrahigh-Voltage, High-Temperature Devices." Materials Science Forum 740-742 (January 2013): 1036–39. http://dx.doi.org/10.4028/www.scientific.net/msf.740-742.1036.

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Insulating properties of package for ultrahigh-voltage, high-temperature devices have been investigated. While all the packages have enough insulating strength at room temperature, deterioration of the insulating property at high temperature has been found with some packages. The authors have found that this deterioration is attributed to degrade the insulation property of AlN ceramics for DBC substrate at high temperature and that there is a various degree in the deterioration.

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5

Rozga, Pawel, and Abderahhmane Beroual. "High Voltage Insulating Materials—Current State and Prospects." Energies 14, no. 13 (2021): 3799. http://dx.doi.org/10.3390/en14133799.

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Guo, Gang, Hongda Li, Mingcheng Gao, and Long Che. "Numerical simulation of the breakdown process of dielectric in high voltage pulse discharge." Journal of Physics: Conference Series 2479, no. 1 (2023): 012009. http://dx.doi.org/10.1088/1742-6596/2479/1/012009.

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Abstract In order to study the breakdown process of the insulating medium of the needle-needle electrode under the action of high-voltage pulse discharge, the HV-LAB simulation software was used to study the discharge channel formed in the three kinds of insulating media, namely water, transformer oil, and air, and the three-dimensional model of the discharge breakdown insulating medium was designed. The process of discharge channel expansion, voltage, current, power, and energy loss in the discharge channel is analyzed. The results show that in the process of high-voltage pulse discharge brea

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7

Tian, Chen, Zhiping Zhu, Jianping Liao, et al. "The study of the electrical properties of nano insulating oil for submarine cables." E3S Web of Conferences 522 (2024): 01019. http://dx.doi.org/10.1051/e3sconf/202452201019.

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At present, the alkylbenzene insulation oil for submarine cables of 220kV and above in China relies on imports, which poses high maintenance costs and supply interruption risks. Nano modified insulating oil has excellent electrical properties and broad application prospects in power systems. Therefore, nano SiO2 modified insulating oil was prepared, and the effects of APTES modified and unmodified nano SiO2 on the viscosity, breakdown voltage, and dielectric loss factor of the insulating oil were compared. The results showed that the viscosity of alkylbenzene insulating oil did not change sign

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8

Rafiq, Muhammad, Muhammad Shafique, Anam Azam, Muhammad Ateeq, Israr Ahmad Khan, and Abid Hussain. "Sustainable, Renewable and Environmental-Friendly Insulation Systems for High Voltages Applications." Molecules 25, no. 17 (2020): 3901. http://dx.doi.org/10.3390/molecules25173901.

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With the inception of high voltage (HV), requisites on the insulating permanence of HV equipment is becoming increasingly crucial. Mineral/synthetic oil liquid insulation—together with solid insulation materials (paper, pressboard)—is the fundamental insulation constituent in HV apparatuses; their insulation attributes perform a substantial part in a reliable and steady performance. Meanwhile, implications on the environment, scarcity of petroleum oil supplies and discarding complications with waste oil have stimulated investigators to steer their attention towards sustainable, renewable, biod

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9

Zhorniak, Liudmyla, Alexej Afanasiev, Vitaliy Schus, and Oleksandr Levchenko. "To the problem of the shielding systems efficiency in constructions of extra-high voltage electrical apparatus." Bulletin of NTU "KhPI". Series: Problems of Electrical Machines and Apparatus Perfection. The Theory and Practice, no. 1 (11) (July 23, 2024): 3–9. http://dx.doi.org/10.20998/2079-3944.2024.1.01.

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In the article, the authors proposed a method for estimating the electric load parameters to calculate the distribution of the electric field strength of the solid insulating structure of gas-filled high-voltage devices with axial symmetry. This structure consists of a support and insulating busbar filled with SF6 gas as an internal insulating medium. This technique allows to evaluate the parameters of the electrical load (voltage and field strength) depen-ding on the design features of the device and the shielding system used to equalize the electric field. The proposed methodology allows to

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10

Mukherjee, Shubhankan, Adhir Baran Chattopadhyay, and Sunil Thomas. "Electrostatic field theoretic approach to analyze the partial discharge phenomenon pertaining to insulation degradation." International Journal of Engineering & Technology 7, no. 2 (2018): 842. http://dx.doi.org/10.14419/ijet.v7i2.12095.

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This paper elucidates the application of electrostatic field theory to analyze partial discharge due to the void formation inside the insulating material. Formation of voids leads to accumulation of static charges leading to capacitance build-up. The most probable cause of insulation failure is due to the subjection of high voltage. Prolonged high voltage poses a threat and leads to insulation failure. Failures occur in the tip gap between the conductor and insulating material’s inner periphery. Probable causes of such failures are corona discharge, surface discharge and treeing, leading to fo

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11

K., Prasath, Karthigeyan M., Suresh Moorthy P., and Prasanth S. "Generation of High Voltage with Voltage Multiplier for Insulation Testing." Journal of Signal Processing 6, no. 2 (2020): 1–5. https://doi.org/10.5281/zenodo.3778251.

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DC high voltage is used in testing a variety of insulating material. To obtain higher D.C voltage with the low input source in small scale circuit a high step up D.C to D.C converter with voltage multiplier module is designed. Simulation of high step up D.C to D.C converter with 24 stage cascaded voltage multiplier module is designed and the multi-module circuit is developed by connecting the output voltage of each module in series is done using software MATLAB Simulink. The maximum D.C. yield voltage of 50.93 k V is produced utilizing this smaller converter in reenactment. Then the voltage di

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12

Siddique, Abubakar, Muhammad Adnan, Waseem Aslam, Abdullah Mujahid, and Tanzeela Khalid. "Enhancement of Dielectric Properties of Echo-Friendly Cottonseed Oil-based Nanofluids for High Voltages." Pakistan Journal of Engineering and Technology 7, no. 01 (2024): 6–12. http://dx.doi.org/10.51846/vol7iss01pp6-12.

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This study investigates the performance of nanofluid-based vegetable oil (VO) as an advanced dielectric medium for high-voltage equipment, with a specific focus on AC breakdown voltage (AC BDV). Nanofluids, comprising carefully selected nanoparticles (including Al2O3, TiO2, Fe2O3, SiO2, and Graphene) dispersed in cottonseed oil (CSO), offer a unique opportunity to enhance the dielectric properties of insulating fluids. Through a systematic experimental approach, AC BDV tests were conducted in Khwaja Fareed UEIT High Voltage Laboratory, and the results were compared to with traditional mineral

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13

Ridel, Aleksander, and Alexander Bychkov. "Optical Recording of Bubble Dissolution of Diagnostic Gases in Electrical Insulating Liquids." Applied Mechanics and Materials 792 (September 2015): 602–5. http://dx.doi.org/10.4028/www.scientific.net/amm.792.602.

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The diffusion coefficients of the basic diagnostic gases were determined by optical recording of the bubble dissolving dynamics in degassed insulating liquid. It is necessary to understand the diffusion of diagnostic gases in insulating liquids for obtaining high-quality diagnostic conclusions obtained during the analysis of high voltage electrical equipment with paper-oil insulation using gas methods.

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14

Nie, Yongjie, Meng Zhang, Yuanwei Zhu, et al. "Electrochromism of Viologen/Polymer Composite: From Gel to Insulating Bulk for High-Voltage Applications." Materials 14, no. 19 (2021): 5901. http://dx.doi.org/10.3390/ma14195901.

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Power equipment operates under high voltages, inducing space charge accumulation on the surface of key insulating structures, which increases the risk of discharge/breakdown and the possibility of maintenance workers experiencing electric shock accidents. Hence, a visualized non-equipment space charge detection method is of great demand in the power industry. Typical electrochromic phenomenon is based on redox of the material, triggered by a voltage smaller than 5 V with a continuous current in μA~mA level, which is not applicable to high electric fields above 106 V/m with pA~nA operation curr

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15

Gao, Yin, Ximing Chen, Yuqing Duan, et al. "Research on the Effect of Nonlinear Variation in Insulation Resistance on the Voltage Divider Ratio of 2 × 550 kV DC Voltage Proportional Standard Device." Electronics 14, no. 1 (2024): 138. https://doi.org/10.3390/electronics14010138.

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This paper investigates the effect of nonlinear changes in insulation resistance on the accuracy of a 2 × 550 kV DC voltage scaling standard device. As the voltage and electric field strength increase, the insulating material exhibits nonlinear conductivity characteristics, leading to a decrease in the insulation resistance value, which in turn affects the potential distribution and the partial voltage ratio and thus reduces the measurement accuracy of the standard device. In order to study this problem in depth, this paper builds a nonlinear resistance measurement platform for insulating mate

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16

Salleh, Nor Izzati Mohd, Nor Akmal Mohd Jamail, Nishanti Suntharasakan, et al. "Analysis of HVDC breakdown characteristic of LLDPEnatural rubber added with biofiller as high voltage insulating material." Indonesian Journal of Electrical Engineering and Computer Science 20, no. 3 (2020): 1203–9. https://doi.org/10.11591/ijeecs.v20.i3.pp1203-1209.

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The influence of solid insulation has been investigated by few researchers. The mechanism of solid breakdown is important in insulation studies. In this research, testing on linear-low density polythylene (LLDPE) with natural rubber (NR) and different weight concentration of biofiller are conducted under high voltage direct voltage (HVDC) by using needle and sphere types of electrode arrangements. Oil palm empty fruit bunch (OPEFB) and pineapple leaf fiber (PALF) are the biofillers used for the samples development. The LLDPE-NR samples consists of different weight percentages of biofiller whic

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17

Zhorniak, Liudmyla, Alexej Afanasiev, and Vitaliy Schus. "Analysis of design and structural features of the external insulation materials of high-voltage devices." Bulletin of NTU "KhPI". Series: Problems of Electrical Machines and Apparatus Perfection. The Theory and Practice, no. 2 (8) (December 27, 2022): 3–10. http://dx.doi.org/10.20998/2079-3944.2022.2.01.

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In the article, the authors have analysed the design and structural features of various materials for external insulation of high-voltage apparatuses, namely, high-voltage equipment of stations and substations. The operational reliability of the external insulation is determined mainly by the electrical load, which is characterized by the local values of the field strength. The field strength along the insulating cover is distributed very unevenly and has a maximum value near the electrode with high voltage. Electrical isolators are used in all high-voltage apparatus of electrical transmission

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18

Baghelkar, Neetu, and Abhishek Dubey. "STUDY AND PERFORMANCE OF PARTIAL DISCHARGE OF MODEL FOR DIFFERENT TYPE INSULATION MATERIALS WITH CAPACITANCE VALUE." International Journal of Research -GRANTHAALAYAH 8, no. 12 (2021): 323–27. http://dx.doi.org/10.29121/granthaalayah.v8.i12.2020.2975.

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The properties of the insulating material must be the best to avoid failure of electrical equipment. Partial discharges act as electrical sparks that occur within insulation and the high-voltage electrical system. The different types of voltage and current pulses are produced, which last for a very short time. Partial discharge is taking place in high voltage power equipment such as cables, transmission lines and transformers, etc.

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19

Ahsan, Matiullah, Md Nor Ramdon Bin Baharom, Zainab Zainal, et al. "Historical Review of Advancements in Insulated Cross-Arm Technology." Energies 15, no. 21 (2022): 8221. http://dx.doi.org/10.3390/en15218221.

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High-voltage transmission technology has advanced quickly with the overall development and increased use of renewable energy. More demands on the insulating system are made when high-voltage power systems evolve. One of the significant factors is the sharp rise in population density, which led to the high demand for electricity. Right-of-way infringement is a problem that frequently occurs these days. Transmission is done over a rated capacity; as a result, the transmission line heats up, the insulation ages, and the electric field becomes distorted. The insulating system is prone to fail too

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20

Chul Kim, Ki. "Degradation evaluation of high voltage insulating oils by terahertz spectroscopy." International Journal of Engineering & Technology 7, no. 2.12 (2018): 8. http://dx.doi.org/10.14419/ijet.v7i2.12.11025.

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Background/Objectives: The stable electrical power supply is the most important issue for modern industrial society employing various electrical appliance. The power transformer is one of the most important component in the electrical power supply system.Methods/Statistical analysis: The common diagnosis method of insulating oil of transformer is gas-chromatograph. The gas-chromatograph is performed to detect dissolved gas ininsulating oil of transformerduring the stop-period of transformer unit. In this research, the optical properties of insulating oils of transformer (unused new oil, used o

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21

Hadi, Nabipour Afrouzi, Zulkurnain Abdul-Malek, Saeed Vahabi Mashak, and A. R. Naderipour. "Three-Dimensional Potential and Electric Field Distributions in HV Cable Insulation Containing Multiple Cavities." Advanced Materials Research 845 (December 2013): 372–77. http://dx.doi.org/10.4028/www.scientific.net/amr.845.372.

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Cross-linked polyethylene is widely used as electrical insulation because of its excellent electrical properties such as low dielectric constant, low dielectric loss and also due to its excellent chemical resistance and mechanical flexibility. Nevertheless, the most important reason for failure of high voltage equipment is due to its insulation failure. The electrical properties of an insulator are affected by the presence of cavities within the insulating material, in particular with regard to the electric field and potential distributions. In this paper, the electric field and potential dist

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22

Rafiq, Muhammad, Yuzhen Lv, and Chengrong Li. "A Review on Properties, Opportunities, and Challenges of Transformer Oil-Based Nanofluids." Journal of Nanomaterials 2016 (2016): 1–23. http://dx.doi.org/10.1155/2016/8371560.

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The mineral oil or synthetic oil in conjunction with paper is mainly being applied as dielectric medium in many of the high voltage apparatus. However, the advent of high voltage levels such high voltage alternating current (HVAC) and high voltage direct current (HVDC) has prompted researchers to direct their focus onto an insulation system which can bear the rising high voltage levels. The modern insulating liquid material development is guided by various factors such as high electrical insulation requirements and other safety and economic considerations. Therefore transformer manufacturer co

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23

Florkowski, Marek. "Comparison of Effects of Partial Discharge Echo in Various High-Voltage Insulation Systems." Energies 17, no. 20 (2024): 5114. http://dx.doi.org/10.3390/en17205114.

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In this article, an extension of a conventional partial discharge (PD) approach called partial discharge echo (PDE), which is applied to different classes of electrical insulation systems of power devices, is presented. Currently, high-voltage (HV) electrical insulation is attributed not only to transmission and distribution grids but also to the industrial environment and emerging segments such as transportation electrification, i.e., electric vehicles, more-electric aircraft, and propulsion in maritime vehicles. This novel PDE methodology extends the conventional and established PD-based ass

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24

Suwarno, Suwarno. "Partial Discharge in High Voltage Insulating Materials." International Journal on Electrical Engineering and Informatics 8, no. 1 (2016): 147–63. http://dx.doi.org/10.15676/ijeei.2016.8.1.11.

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Zhorniak, Liudmyla, Alexej Afanasiev, and Vitaliy Schus. "Analysis of the features of the shielding system of polymer insulation structures of high voltage electrical equipment." Bulletin of the National Technical University "KhPI". Series: Energy: Reliability and Energy Efficiency, no. 1 (8) (July 5, 2024): 41–48. http://dx.doi.org/10.20998/2224-0349.2024.01.18.

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In the article, the authors analysed the existing shielding systems of insulating structures of high-voltage devices together with electrodes under high potential. At the same time, the possibilities of using toroidal screens of various designs and the conditions of their installation in gas-filled equipment structures (gas-filled current and voltage measuring transformers, arresters, etc.) using polymer insulating materials are considered. Based on the analysis of literary sources, the most effective method of estimating the electric load parameters for determining the electric field strength

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26

Wang, Yanyu. "Characteristics and Application Scenarios of Polymer Insulating Materials." Journal of Education, Teaching and Social Studies 7, no. 2 (2025): p95. https://doi.org/10.22158/jetss.v7n2p95.

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Polymer insulating materials, owing to their excellent electrical insulation properties, good mechanical strength, chemical corrosion resistance, and ease of processing and molding, have been widely applied in key fields such as power systems, communication equipment, electronic devices, transportation, and aerospace. With the continuous advancement of industrial electrification, automation, and intelligence, higher requirements are placed on the adaptability and reliability of insulating materials in operating environments. This paper systematically analyzes the fundamental properties of poly

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27

Uydur, Cihat Cagdas, and Firat Akin. "Exploring High Voltage Potential of 3D Printed Capacitors: A Filament-Based Comparison Through Dielectric Performance Analysis." Applied Sciences 14, no. 24 (2024): 11894. https://doi.org/10.3390/app142411894.

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Recent advancements in 3D printing technology have enabled the rapid production of complex structures, yet the dielectric performance of 3D printing materials and their potential for manufacturing electrical components remain insufficiently studied. In this study, a capacitor rated at 10 kV with a capacitance of 1 nF was designed and developed for high-voltage applications. During the production of the capacitor, the insulating and conductive parts were fabricated using a 3D printer. While PLA, ABS, ASA, and PETG were employed as insulating materials, aluminum was chosen as the conductive part

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28

Lyutikova, M. N., S. M. Korobeynikov, and A. A. Konovalov. "Electrophysical properties of mixtures of mineral oil and synthetic ester dielectric liquid." Safety and Reliability of Power Industry 14, no. 2 (2021): 132–41. http://dx.doi.org/10.24223/1999-5555-2021-14-2-132-141.

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Power transformers are key equipment in power generation, transmission, and distribution systems. The reliability of power transformers is based on the performance of the insulation system, which includes solid cellulose insulation and a liquid dielectric. Modern power engineering requires liquid insulation to have excellent insulating properties, high fire resistance, and biodegradability. Mineral oil that has been in use for over 100 years does not meet certain requirements. Therefore, various methods of enhancing the insulating properties of the oil are currently being considered, including

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29

Ye, Xiangyang, and Mahesh Dhotre. "CFD Simulation of Transonic Flow in High-Voltage Circuit Breaker." International Journal of Chemical Engineering 2012 (2012): 1–9. http://dx.doi.org/10.1155/2012/609486.

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A high-voltage circuit breaker is an indispensable piece of equipment in the electric transmission and distribution systems. Transonic flow typically occurs inside breaking chamber during the current interruption, which determines the insulating characteristics of gas. Therefore, accurate compressible flow simulations are required to improve the prediction of the breakdown voltages in various test duties of high-voltage circuit breakers. In this work, investigation of the impact of the solvers on the prediction capability of the breakdown voltages in capacitive switching is presented. For this

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Wajanasoonthon, Kanin, and Amnart Suksri. "Long Term Thermal Performance of Palm Oil and Nano Graphene Filler in Nanofluids Application on Transformer Insulating Oil and Electrical Breakdown Voltage." Key Engineering Materials 931 (September 9, 2022): 9–15. http://dx.doi.org/10.4028/p-bhz05b.

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Mineral oil has been used as electrical insulation for a long time due to its availability, excellent cooling and dielectric property. However, petroleum sources are nonrenewable, and it is depleting. Vegetable insulating oil is an alternative since it is renewable, environment-friendly, biodegradable, high fire-point, and has a good electrical breakdown voltage level. These properties can make vegetable insulating oil as a replacement for mineral oil that is going to be limited in availability. Nevertheless, vegetable insulating oil have high viscosity, leading to a slow flow rate on the cool

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Du, Bin, Yu Shi, and Qian Liu. "Fabrication of Fe3O4@SiO2 Nanofluids with High Breakdown Voltage and Low Dielectric Loss." Coatings 9, no. 11 (2019): 716. http://dx.doi.org/10.3390/coatings9110716.

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Insulating oil modified by nanoparticle (often called nanofluids) has recently drawn considerable attention, especially concerning the improvement of electrical breakdown and thermal conductivity of the nanofluids. However, traditional insulating nanofluid often tends to high dielectric loss, which accelerates the ageing of nanofluids and limits its application in electrical equipment. In this paper, three core-shell Fe3O4@SiO2 nanoparticles with different SiO2 shell thickness were prepared and subsequently dispersed into insulating oil to achieve nanofluids. The dispersion stability, breakdow

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Ashok, Kumar S*1 Dr.Mohd. Z.A.Ansari2 Dr. K.G. Manjunatha3 &. Syed Ameen Murtuza4. "AN EXPERIMENTAL STUDY ON VISCOSITY OF WATER SOLUBLE POLYMERS USED IN PRE COMPRESSED PRESSBOARDS INSULATION." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 7, no. 4 (2018): 692–97. https://doi.org/10.5281/zenodo.1228759.

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Water soluble polymers are classified according to highly varied families of products of natural or synthetic origin and have several uses. Among these families, synthetic polymers are mainly used for bonding of boards and paper laminates which is used as an insulation for high voltage power transformers. The three main characteristics of water soluble polymers used in laminates are the molecular weight, concentration and internal structure. In general, the efficiency of the polymer will be greater if it posses longer molecular chain which inturn depend on their molecular weight. In addition t

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Bu, Qinhao, Sheng Liu, Le Feng, Haowei Xu, and Qiaogen Zhang. "High Frequency Breakdown Characteristics of Alumina Filler Content Epoxy Resin." Advances in Engineering Technology Research 11, no. 1 (2024): 399. http://dx.doi.org/10.56028/aetr.11.1.399.2024.

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Power electronic transformers have high insulation frequency and compact insulation structure, and insulation performance is one of the main factors restricting their further development. Epoxy resin is an important insulating material in the electrical industry, its thermal conductivity and mechanical properties can not meet the needs of high-frequency transformers, usually metal oxide (Al2O3, etc.) is added to form composite insulation material. It is of great reference value for the insulation design of power electronic transformer to study the insulation performance of composite insulation

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Ghani, Sharin Ab, Mohd Shahril Ahmad Khiar, Imran Sutan Chairul, and Muhammad Imran Zamir. "Effect of repeated electrical breakdowns on mineral and natural ester insulating oils." Bulletin of Electrical Engineering and Informatics 10, no. 6 (2021): 2989–96. http://dx.doi.org/10.11591/eei.v10i6.3258.

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Transformer insulating oils are exposed to repeated electrical discharge or breakdowns inside power transformers. Durability tests are conducted to analyze the ability of oil to resist decomposition due to such high electrical stresses. With the increasing demand for alternative insulating oils for oil-immersed transformers, it is worthy to compare the performance of different types of insulating oils (conventional mineral-based insulating oil and natural ester-based insulating oil) under repeated electrical breakdown. In this paper, the AC breakdown voltage of different mineral-based and natu

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Sharin, Ab Ghani, Shahril Ahmad Khiar Mohd, Sutan Chairul Imran, and Imran Zamir Muhammad. "Effect of repeated electrical breakdowns on mineral and natural ester insulating oils." Bulletin of Electrical Engineering and Informatics 10, no. 6 (2021): 2989–96. https://doi.org/10.11591/eei.v10i6.3258.

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Transformer insulating oils are exposed to repeated electrical discharge or breakdowns inside power transformers. Durability tests are conducted to analyze the ability of oil to resist decomposition due to such high electrical stresses. With the increasing demand for alternative insulating oils for oilimmersed transformers, it is worthy to compare the performance of different types of insulating oils (conventional mineral-based insulating oil and natural ester-based insulating oil) under repeated electrical breakdown. In this paper, the AC breakdown voltage of different mineral-based and natur

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Yamamoto, Osamu. "EXPERIENCES IN NUMERICAL ANALYSES OF SURFACE CHARGE ON INSULATORS EXPOSED TO HIGH VOLTAGE IN VACUUM." ASEAN Engineering Journal 5, no. 1 (2015): 9–21. http://dx.doi.org/10.11113/aej.v5.15452.

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This paper deals with the electrical insulation of a gap bridged by a solid dielectric between a pair of electrodes in a vacuum, where the dielectric is a model of an insulating spacer holding electrodes in various vacuum devices. Such gap configuration is typical as a model for studying physical mechanisms of an electrical breakdown or a flashover in a vacuum, in which the insulation ability is considerably lower than a gap without any insulating spacers. Many researchers have long investigated the mechanisms of flashover, and it is believed that the charging of the insulator surface is the p

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Lühring, Ulrich, Daniel Wienold, and Frank Jenau. "Investigation on the Applicability of the Time Domain Analysis of Discharges in Gases for the Defect Identification at AC Voltage." Transactions on Environment and Electrical Engineering 2, no. 1 (2017): 35. http://dx.doi.org/10.22149/teee.v2i1.57.

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The partial discharge diagnosis is an established instrument for the condition assessment of high voltage insulations and equipment. Under AC voltage stress the phase resolved pattern is of great significance in order to become aware of the type of fault. As a result of the inapplicability for DC voltage stress, approaches for alternative interpretation techniques such as the time domain analysis of partial discharges were identified in recent investigations. In these different types of fault are taken into account as well as different insulating media. The purpose of this paper is to investig

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Huang, Fang. "Technology of Heat-Resistant & High Voltage-Resistant Insulation Materials Based on Polymer Composite." Advanced Materials Research 391-392 (December 2011): 340–44. http://dx.doi.org/10.4028/www.scientific.net/amr.391-392.340.

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High voltage insulation of the heat-resistant polymer composite material mainly composed of synthetic resin matrix, reinforcing materials, inorganic fillers, pigments and other components. In addition, according to the technical and performance requirements will be added in the resin matrix curing agent, thickener, mold release agents, solvents and so on. By different proportions of the resin matrix and filler and other additives, under conditions in certain insulating polymer composites were prepared to explore the relationship between components, the best formula and the ideal insulation mat

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NIWA, Toshio, Izumi ISHIKAWA, Hiroyuki MIYATA, and Tohru TAKAHASHI. "Development of Insulating Materials for High Voltage Cables." International Journal of the Society of Materials Engineering for Resources 3, no. 1 (1995): 160–66. http://dx.doi.org/10.5188/ijsmer.3.160.

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Frolov, S. T., N. Ya Gusak, V. P. Mukhin, L. Ya Yantovskii, and A. D. Smolyar. "Improved qhenching of glass high-voltage insulating components." Glass and Ceramics 46, no. 9 (1989): 371–72. http://dx.doi.org/10.1007/bf00677804.

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Ma, Cheng, Meilin Wu, Wennan Wang, Yaqiong Jia, and Wei Shi. "Electrical Characterizations of 35-kV Semi-Insulating Gallium Arsenide Photoconductive Switch." Photonics 8, no. 9 (2021): 385. http://dx.doi.org/10.3390/photonics8090385.

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In this paper, a three-layer GaAs photoconductive semiconductor switch (GaAs PCSS) is designed to withstand high voltage from 20 to 35 kV. The maximum avalanche gain and minimum on-state resistance of GaAs PCSS are 1385 and 0.58 Ω, respectively, which are the highest values reported to date. Finally, the influence of the bias voltage on the avalanche stability is analyzed. The stability of the GaAs PCSS is evaluated and calculated. The results show that the jitter values at the bias voltages of 30 kV and 35 kV are 164.3 ps and 106.9 ps, respectively. This work provides guidance for the design

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Jerferi, Muhammad Syahmi, Nor Akmal Mohd Jamail, Nor Shahida Mohd Jamail, and Qamarul Ezani Kamarudin. "Analysis of Insulation Properties for High Voltage Applications – A Review." Journal of Advanced Research in Applied Mechanics 127, no. 1 (2024): 64–76. https://doi.org/10.37934/aram.127.1.6476.

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Four popular plastic polymers (LLDPE, XLPE, LDPE and HDPE) that are frequently utilised in high voltage applications are thoroughly examined in the review. It highlights how crucial it is to choose the right insulating material based on your needs. HDPE is perfect for pipes and packaging due to its density and crystallinity. Because of its superior mechanical and thermal properties due to the cross-linking process, XLPE is the material of choice for electrical insulation. The low density, impact resistance and flexibility of LDPE are well known. The essay also examines initiatives to improve t

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Lyutikova, M. N., S. M. Korobeynikov, S. I. Sotnikov, and A. A. Konovalov. "Study of chemical properties of insulation mixtures to be used in high-voltage equipment." Safety and Reliability of Power Industry 15, no. 2 (2022): 81–89. http://dx.doi.org/10.24223/1999-5555-2022-15-2-81-89.

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Reliable operation of high-voltage oil-filled equipment directly depends on the condition of the insulation. One of the main components of the insulation system is transformer oil, which has been used for more than 120 years. However, in the light of modern requirements for insulating materials, oil is significantly inferior to synthetic esters in terms of such properties as chemical stability, environmental safety and high fire resistance. At present, the mixing of synthetic ester and transformer oil can be considered as one of the ways to improve the properties of the latter. A change in the

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Wolny, Stefan. "Analysis of High-Frequency Dispersion Characteristics of Capacitance and Loss Factor of Aramid Paper Impregnated with Various Dielectric Liquids." Energies 12, no. 6 (2019): 1063. http://dx.doi.org/10.3390/en12061063.

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This paper presents research results of the loss factor of high voltage insulation samples made of aramid paper impregnated with various types of insulating oil. The analysis was carried out in the high frequency domain in the range of 50 Hz to 1 MHz. The experiments were carried out for three impregnation types: mineral oil, synthetic ester and natural ester. The influence of temperature in the range of 20 °C to 100 °C, which is typical when using this type of insulation in power transformers, was taken into account. In addition, the process of influence of initial aging of aramid paper was s

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Mohd Salleh, Nor Izzati, Nor Akmal Mohd Jamail, Nishanti Suntharasaka, et al. "Analysis of HVDC breakdown characteristic of LLDPE-natural rubber added with biofiller as high voltage insulating material." Indonesian Journal of Electrical Engineering and Computer Science 20, no. 3 (2020): 1203. http://dx.doi.org/10.11591/ijeecs.v20.i3.pp1203-1209.

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<p>The influence of solid insulation has been investigated by few researchers.<br />The mechanism of solid breakdown is important in insulation studies. In this<br />research, testing on Linear-Low Density Polythylene (LLDPE) with Natural<br />Rubber (NR) and different weight concentration of biofiller are conducted<br />under High Voltage Direct Voltage (HVDC) by using needle and sphere<br />types of electrode arrangements. Oil Palm Empty Fruit Bunch (OPEFB) and<br />Pineapple Leaf Fiber (PALF) are the biofillers used for the samples<br />develo

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Ahmadi, Soheil, S. H. Khan, and K. T. V. Grattan. "Mitigating Skin and Proximity Effect in High-Voltage Underground Segmented Cables Through Individually Insulating Conductor Strings." Energies 18, no. 7 (2025): 1605. https://doi.org/10.3390/en18071605.

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High-voltage underground cables inevitably experience frequency-dependent electromagnetic (EM) losses, driven primarily by skin and proximity effects. These losses become more severe at higher harmonic frequencies, which are increasingly common in modern power networks. In traditional multi-segment cable designs, uninsulated conductor bundles enable large circular eddy current loops that elevate AC resistance and exacerbate both skin and proximity phenomena. This paper investigates the impact of introducing a thin insulating layer between individual conductor strings in a five-segment high-vol

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Zhang, Xu, Chuan Li, Yu Hui Li, Hong Wei Yang, and Jian Fa Li. "The Electrical Insulation Property of PTFE Cannula in High Elevation." Advanced Materials Research 516-517 (May 2012): 1545–50. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.1545.

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The polytetrafluoroethylene (PTFE) with the good dielectric property is a kind of nonpolar material. Made from the PTFE, the cannula has the high electrical insulation performance. This cannula can be applied to the equipment which requires for the high electrical insulation. There are 3 kinds of power-frequency voltage resistant experiments on PTFE cannulas with the inner diameter and outer diameter of 0.55/1.35, 0.7/1.5, 0.96/1.6, 0.46/0.96, 1.5/3.0 in the 1970m elevation. The PTFE cannulas are tested at the 85kV power-frequency voltage with the pure condition, the humidity condition, and th

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Cheng, Yujia, Guang Yu, and Zhuohua Duan. "Breakdown Properties of Cables with Different Inorganic, Insulating Nanomaterials." Inorganics 9, no. 12 (2021): 90. http://dx.doi.org/10.3390/inorganics9120090.

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The insulation performance of cable insulating materials can be optimised via matrix modification. Typically, low-density polyethylene (LDPE) is used as the matrix, and a certain proportion of nanoparticles are added to this matrix. To explore the effects of nanoparticles with different forms on the structural interface and crystal morphology of the material, nano-MMT and nano-ZnO were added to LDPE, and comparative experiments were carried out. Based on microscopic test results, material insulation performance changes before and after optimisation were observed. Then, simulation cable models

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Yoo, Jeong-Sang, Yong-Man Gil, and Tae-Young Ahn. "High-Power-Density DC–DC Converter Using a Fixed-Type Wireless Power Transmission Transformer with Ceramic Insulation Layer." Energies 15, no. 23 (2022): 9006. http://dx.doi.org/10.3390/en15239006.

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In this study, we propose the use of a short-distance and fixed-type wireless power transmission transformer via a half-bridge LLC resonant converter. A ceramic insulating layer was used instead of an air gap, meaning that the heat generated from the transformer core and the PCB winding was quickly transferred to the external metal case, with the ceramic insulating layer acting as a heat pipe. In order to stabilize the output voltage, we proposed the use of IR photo tunnel technology, and it was applied to two ceramic insulating layers so that the voltage error signal of the secondary output v

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Andrade, Arthur F., Edson G. Costa, Filipe L. M. Andrade, Clarice S. H. Soares, and George R. S. Lira. "Design of Cable Termination for AC Breakdown Voltage Tests." Energies 12, no. 16 (2019): 3075. http://dx.doi.org/10.3390/en12163075.

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International standards prescribe overvoltage tests to evaluate the insulating material performance of high-voltage cables. However, it is difficult to manage the electric fields at the cable ends when laboratory measurements are carried out because surface and external discharges occur at the cable termination. Therefore, this paper presents a procedure for designing cable terminations to reduce the electric field at the cable ends to appropriate levels even in the case of overvoltage tests. For this purpose, computer simulations of electric field distribution using the finite element method

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