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Journal articles on the topic 'Ultra high voltage and extra high voltage'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Li, Youyi, Jianping Wang, and Kai Liu. "Improved travelling wave protection for extra-high-voltage/ultra-high-voltage transmission lines." Journal of Engineering 2019, no. 16 (2019): 3280–83. http://dx.doi.org/10.1049/joe.2018.8803.

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Lei, Aoyu, Xinzhou Dong, Shenxing Shi, and Bin Wang. "Impedance-based pilot protection for ultra-high-voltage/extra-high-voltage transmission lines." Journal of Engineering 2018, no. 15 (2018): 904–7. http://dx.doi.org/10.1049/joe.2018.0157.

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Liu, Shiming, Jianhui Li, Jukun Wu, Tao Guo, and Lin Jiang. "Ultra-high voltage/extra-high voltage transmission-line protection based on longitudinal tapped impedance." IET Generation, Transmission & Distribution 11, no. 17 (2017): 4158–66. http://dx.doi.org/10.1049/iet-gtd.2016.0085.

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4

Thust, A., and W. M. J. Coene. "Advanced computing for ultra-high-resolution in TEM." Proceedings, annual meeting, Electron Microscopy Society of America 53 (August 13, 1995): 36–37. http://dx.doi.org/10.1017/s0424820100136556.

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1. Introduction Attempts to push the resolution of electron microscopes towards 1 Å follow presently two different strategies. One approach takes advantage of the short electron wavelength provided by high-voltage instruments (E > 1 MeV) resulting in an "interpretable" point resolution close to the information limit. An alternative strategy is based on the idea to extend the information limit of conventional medium-voltage instruments (E ≈ 200 - 300 keV) by taking advantage of the excellent coherence properties of field-emission guns (FEG). In the latter approach, however, the gain of extra

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Li, Li, Qi Li, Shuxin Xu, et al. "Electric Field Improvement for High-Voltage Bushings." Polymers 15, no. 1 (2022): 40. http://dx.doi.org/10.3390/polym15010040.

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Resin-impregnated paper (RIP) bushing has gained significant interest due to its extended application in Extra High Voltage (EHV) and Ultra High Voltage (UHV) electricity transmission systems. However, the design criterion of its overall structure, the geometry parameters of the condenser layers, and stress release devices, etc., are still not fully understood. This article proposes a unique electric field optimization technique to integrate both the analytical and the numerical methods. The charge simulation method (CSM) is employed to create the overall equipotential surface, within which th

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Ashraf Balametov, Ashraf Balametov, and Tarana Isaeva Tarana Isaeva. "SOFTWARE FOR MONITORING AC CORONA EFFECTS OF OVERHEAD LINES." PAHTEI-Procedings of Azerbaijan High Technical Educational Institutions 20, no. 09 (2022): 04–14. http://dx.doi.org/10.36962/pahtei20092022-04.

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The issues of environmental impact of high-voltage transmission lines are becoming relevant in connection with the development of electrical networks of high voltage 110, 220, 330 kV, extra-high voltage (EHV) 500-750 kV and ultra-high voltage 1150 kV. The harmful effect of electric and magnetic fields on living organisms and, first of all, on humans, manifests itself only at very high voltages in the wires of the overhead line (OH) phases, and is dangerous when working under voltage. The direct influence of the electromagnetic field of lines on a person is associated with an effect on the card

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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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Zhang, Kun, Jianqiao Hu, Xiaoyan Lu, Zhengwei Peng, Peihua Ma, and Feng Gao. "Influence of fast switching fault current limiter on electromagnetic transient of extra-high voltage transmission line." Journal of Physics: Conference Series 2903, no. 1 (2024): 012007. https://doi.org/10.1088/1742-6596/2903/1/012007.

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Abstract The rapid advancement of power systems has led to an increase in short-circuit currents. The short-circuit current can be effectively limited by adding a fast-switching fault current limiter. However, incorporating a current-limiting reactor into ultra-high voltage lines may impact electromagnetic transients. This study utilizes PSCAD/EMTDC electromagnetic transient simulation software to develop a typical 330kV transmission line model for simulation analysis. The paper aims to study whether the current limiting reactor will affect the switching overvoltage in the automatic reclosing

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S. S. Trinadh Kumar, A., and B. V. V. Satyanarayana. "Low voltage high speed 8T SRAM cell for ultra-low power applications." International Journal of Engineering & Technology 7, no. 3.29 (2018): 70. http://dx.doi.org/10.14419/ijet.v7i3.29.18464.

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The usage of portable devices increasing rapidly in the modern life has led us to focus our attention to increase the performance of the SRAM circuits, especially for low power applications. Basically in six-Transistor (6T) SRAM cell either read or write operation can be performed at a time whereas, in 7T SRAM cell using single ended write operation and single ended read operation both write and read operations will be accomplished simultaneously at a time respectively. When it comes to operate in sub threshold region, single ended read operation will be degraded severely and single ended writ

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10

Al-Rawashdeh, Ayman Y., Abdallah R. Alzyoud, Khalaf Y. Alzyoud, Jawdat S. Alkasassbeh, and Ashraf Samara. "The impact of using phase-shift transformers on transmission lines." Indonesian Journal of Electrical Engineering and Computer Science 30, no. 2 (2023): 651. http://dx.doi.org/10.11591/ijeecs.v30.i2.pp651-658.

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Phase shift transformers (PST) are a special type of transformers used to regulate active and reactive power on 3-phase transmission networks by adjusting the difference of voltage phase angle between system nodes. Problems related to power flow and stability, particularly voltage stability issues, are important at the extra high voltage (EHV) and ultra high voltage (UHV) levels due to their extreme sensitivity to active and reactive power changes. Several studies investigated these problems using three-phase systems. Accordingly, this research aims to demonstrate the impact of using PST with

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Ayman, Y. Al-Rawashdeh, Ershoud Alzyoud Abdallah, Y. Alzyoud Khalaf, S. Alkasassbeh Jawdat, and Samarah Ashraf. "The impact of using phase-shift transformers on transmission lines." Impact of using phase-shift transformers on transmission lines 30, no. 2 (2023): 651–58. https://doi.org/10.11591/ijeecs.v30.i2.pp651-658.

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Phase shift transformers (PST) are a special type of transformers used to regulate active and reactive power on 3-phase transmission networks by adjusting the difference of voltage phase angle between system nodes. Problems related to power flow and stability, particularly voltage stability issues, are important at the extra high voltage (EHV) and ultra high voltage (UHV) levels due to their extreme sensitivity to active and reactive power changes. Several studies investigated these problems using three-phase systems. Accordingly, this research aims to demonstrate the impact of using PST with

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BELYAEV, Andrey N., and Oleg O. PERESLYTSKIKH. "Increasing Stability of Ultra-Long Power Transmissions by FACTS Device Distributed Control." Elektrichestvo 1, no. 1 (2021): 4–12. http://dx.doi.org/10.24160/0013-5380-2021-1-4-12.

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Steady-state operation modes and stability of a long-distance extra-high voltage transmission line equipped with FACTS devices are studied. The capabilities of increasing the transmitted power limits to a level of more than 30% above the power line surge impedance loading are shown. The effect the coordinated control of FACTS devices has on the power line small-signal stability is analyzed. By incorporating the power transmission full phasor difference feedbacks into the FACTS device control systems it becomes possible to obtain good small-signal stability indices in the entire range of power

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Zhou, Lihui, Yu Shen, Song Zhang, Haiyu Li, and Jiayang Ni. "Binary Tree Algorithm-based Fault Location Method for Tripping in Ultra-high Voltage Substations." Journal of Physics: Conference Series 2644, no. 1 (2023): 012004. http://dx.doi.org/10.1088/1742-6596/2644/1/012004.

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Abstract The current conventional method for fault location in substations involves using a mathematical model to convert the problem into a parameter identification problem. However, this approach often yields poor results due to the lack of characterization of fault features. To address this, a new fault location method for tripping faults in Extra High Voltage (EHV) substations is proposed. This method utilizes a binary tree algorithm to construct a fault binary tree and encode the nodes to accurately characterize the fault characteristics. Using this information, a fault location model is

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Teng, Zihan, Jun Zhao, Qi Wang, Haonan Lu, and Jiangong Zhang. "Development and Experimental Research of VFTO Measuring Sensor." Sensors 23, no. 1 (2022): 264. http://dx.doi.org/10.3390/s23010264.

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Very fast transient overvoltage (VFTO) generated by an operating disconnector is one of the main reasons for electromagnetic disturbance in gas-insulated switchgear (GIS) substations. Generally, the amplitude of VFTO can be used as one of the references for the insulation design of GIS primary electric power equipment, so it is necessary to obtain its accurate amplitude. In this study, a new VFTO measuring sensor is developed and its measurement performance is demonstrated through hundreds of operations by a disconnector in a 220 kV GIS test circuit. The validation shows that the low cut-off f

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15

M., Arshad Shehzad Hassan Guobing Song Xiaoning Kang. "A Novel Principle of Current Differential Protection for UHV and EHV Transmission Lines Based on Distributed Parameters Line Model." A Novel Principle of Current Differential Protection for UHV and EHV Transmission Lines Based on Distributed Parameters Line Model 2, no. 4 (2015): 48–53. https://doi.org/10.5281/zenodo.17188.

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Distributed capacitive current of ultra high voltage and extra high voltage (UHV&EHV) transmission lines has a severe negative effect on current differential protection. The current differential protection in this proposed paper is based on distributed parameters line model of the transmission line and has been used to solve the problem of distributive capacitive current of transmission line. Time-domain algorithm has been used to calculate currents at the set point of the line by using both ends current. By adding linear interpolation with low computational rate at each sampling points ha

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Tuhay, Yu I., V. V. Kuchansky, and I. Yu Tuhay. "THE USING OF CONTROLLED DEVICES FOR THE COMPENSATION OF CHARGING POWER ON EHV POWER LINES IN ELECTRIC NETWORKS." Tekhnichna Elektrodynamika 2021, no. 1 (2021): 53–56. http://dx.doi.org/10.15407/techned2021.01.053.

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It is shown that the use of controlled shunt reactors allows you to create FACTS-controlled power lines based on extra-high voltage power lines that meet the necessary requirements of modern energy systems to control normal conditions. The typical modes of operation of an ultra-high voltage power line with installed controlled shunt reactors are analyzed. The efficiency of using controlled shunt reactors to increase the reliability of single-phase auto-reclosing is shown. The issues of the appearance of an aperiodic component in the current when disconnecting the line of SF6 circuit breakers a

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17

Qu, Baojun, Qingxin Yang, Yongjian Li, Reza Malekian, and Zhixiong Li. "A New Concentration Detection System for SF6/N2 Mixture Gas in Extra/Ultra High Voltage Power Transmission Systems." IEEE Sensors Journal 18, no. 9 (2018): 3806–12. http://dx.doi.org/10.1109/jsen.2018.2817460.

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18

Arifov, S. S., and D. А. Каlandarova. "State of cerebral circulation in neurosensoral deaf in combination stable voltage stenocardia." Russian Otorhinolaryngology 20, no. 6 (2021): 20–25. http://dx.doi.org/10.18692/1810-4800-2021-6-20-25.

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The aim of this study was to study the state of cerebral circulation using duplex scanning of extra- and intracranial vessels in sensorineural hearing loss in combination with stable exertional angina. The study included 43 patients with diagnosed sensorineural hearing loss in combination with stable exertional angina at the age of 30 to 63 years, who had not previously received antianginal drugs. With the help of color duplex scanning, cerebral circulation in the extra- and intracranial vessels was studied. 19 people (44,2%) had the first degree, and 16 people (37,2%) had the second degree of

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19

Wagh, Amruta Narendra. "Amplitude Based Pilot Protection for Transmission Line." International Journal for Research in Applied Science and Engineering Technology 11, no. 6 (2023): 2089–101. http://dx.doi.org/10.22214/ijraset.2023.53989.

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Abstract: Distance protection and differential protection schemes are the two primary types of protection schemes employed in gearbox line protection today. However, industrial practice has shown that commonly used gap prevention techniques are limited in tripping speed and selectivity. The timing of the samples in each of the two relays located at the gearbox line terminals also affects the differential protection mechanism. On the other hand, pilot safety schemes using only the communication link to exchange local decision-making about fault conditions are not affected. These method include

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Tognola, Gabriella, Emma Chiaramello, Marta Bonato, et al. "Cluster Analysis of Residential Personal Exposure to ELF Magnetic Field in Children: Effect of Environmental Variables." International Journal of Environmental Research and Public Health 16, no. 22 (2019): 4363. http://dx.doi.org/10.3390/ijerph16224363.

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Personal exposure to Extremely Low Frequency Magnetic Fields (ELF MF) in children is a very timely topic. We applied cluster analysis to 24 h indoor personal exposures of 884 children in France to identify possible common patterns of exposures. We investigated how electric networks near child home and other variables potentially affecting residential exposure, such as indoor sources of ELF MF, the age and type of the residence and family size, characterized the magnetic field exposure patterns. We identified three indoor personal exposure patterns: children living near overhead lines of high (

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21

Raza, Ali, Muhammad Younis, Yuchao Liu, Ali Altalbe, Kumars Rouzbehi, and Ghulam Abbas. "A Multi-Terminal HVdc Grid Topology Proposal for Offshore Wind Farms." Applied Sciences 10, no. 5 (2020): 1833. http://dx.doi.org/10.3390/app10051833.

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Although various topologies of multi-terminal high voltage direct current (MT-HVdc) transmission systems are available in the literature, most of them are prone to loss of flexibility, reliability, stability, and redundancy in the events of grid contingencies. In this research, two new wind farms and substation ring topology (2WF-SSRT) are designed and proposed to address the aforementioned shortcomings. The objective of this paper is to investigate MT-HVdc grid topologies for integrating large offshore wind farms with an emphasis on power loss in the event of a dc grid fault or mainland alter

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Liu, Hui, Xujun Lang, Ziyang Li, Zhibing Sun, and Shilong Huang. "Influences of Wind Deviation on the Ground Resultant Electric Field under Parallel Operation of 750-kV Ultra-High-Voltage Alternating Current and ±800-kV Extra-High-Voltage Direct Current Transmission Lines Passing through Residential Areas in a High-Altitude Area." Mathematical Problems in Engineering 2023 (November 14, 2023): 1–10. http://dx.doi.org/10.1155/2023/2373118.

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The formation mechanism of the resultant electric field is complex under parallel operation of extra-high-voltage alternating current (AC)/direct current (DC) transmission lines. However, existing methods are computationally expensive and fail to guarantee the stability and convergency of results. To solve this problem, a calculation method with nonuniform grids and varying time steps was proposed on the basis of the finite-volume and finite-element method for calculating the ground resultant electric field of parallel AC/DC transmission lines. The selection of the initial value of space charg

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23

Lee, Hyeseon, Byungsung Lee, Gyurim Han, Yuri Kim, and Yongha Kim. "Development of Methods for an Overhead Cable Health Index Evaluation That Considers Economic Feasibility." Energies 16, no. 20 (2023): 7122. http://dx.doi.org/10.3390/en16207122.

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To supply stable and high-quality power according to the advancement of industrial growth, electric power companies have performed maintenance of power facilities using various methods. In the case of domestic power distribution facilities, there are limitations in performing diagnostic management on all facilities owing to the large number of facilities; therefore, old facilities are managed using the health index assessment method. The health index assessment comprises only facility operation data and external environmental data and is managed only for four types of distribution facilities i

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Straube, Florian, Uwe Dorwarth, Stefan Hartl, et al. "Benefit of ultra-high-density mapping-guided radiofrequency reablation in pulmonary vein isolation non-responders after initial cryoballoon procedure." EP Europace 22, no. 6 (2020): 906–15. http://dx.doi.org/10.1093/europace/euaa055.

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Abstract Aims Symptomatic atrial arrhythmias despite complete pulmonary vein isolation (PVI) are common. The purpose was to evaluate ultra-high-density multi-electrode electroanatomical mapping-guided radiofrequency ablation (RFA) in PVI non-responders. Methods and results Ultra-high-density multi-electrode electroanatomical mapping-guided RFA in consecutive symptomatic atrial fibrillation (AF) patients after initial cryoballoon PVI was performed. Patients were included if all pulmonary veins (PVs) were still isolated. Radiofrequency targets were atrial tachycardia (AT), extra-PV trigger, and/

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Xue, Naifan, Bei Li, Yuan Wang, et al. "Spatial-Temporal Kinetic Behaviors of Micron-Nano Dust Adsorption along Epoxy Resin Insulator Surfaces and the Physical Mechanism of Induced Surface Flashover." Polymers 16, no. 4 (2024): 485. http://dx.doi.org/10.3390/polym16040485.

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The advanced Gas Insulated Switchgear/Gas Insulated Lines (GIS/GIL) transmission equipment serves as an essential physical infrastructure for establishing a new energy power system. An analysis spanning nearly a decade on faults arising from extra/ultra-high voltage discharges reveals that over 60% of such faults are attributed to the discharge of metal particles and dust. While existing technical means, such as ultra-high frequency and ultrasonic sensing, exhibit effectiveness in online monitoring of particles larger than sub-millimeter dimensions, the inherent randomness and elusive nature o

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He, Ren Wang, and Yi Bo Yang. "A Novel Transient Directional Unit Based on Adaptive Median Filtering." Advanced Materials Research 433-440 (January 2012): 4500–4505. http://dx.doi.org/10.4028/www.scientific.net/amr.433-440.4500.

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A new transient directional unit for extra high voltage(EHV) power transmission lines is proposed, which identifies fault direction by means of comparing the time-domain transient energy of the forward traveling-wave with that of the backward one in the very short period of time after fault occurs. The unit algorithm is designed with the technology of adaptive median filtering, which is first employed to process the forward and backward traveling-waves, and then calculates the time-domain transient energy ratio of the forward traveling-wave to the back one, by which the fault direction is disc

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27

Liu, Yong, Yufeng Guo, Bohan Wang, Qiran Li, Qun Gao, and Yuanhao Wan. "Research on Influencing Factors and Wind Deflection Warning of Transmission Lines Based on Meteorological Prediction." Energies 17, no. 11 (2024): 2612. http://dx.doi.org/10.3390/en17112612.

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Transmission lines are affected by external environmental factors such as strong winds and ice cover. In recent years, extreme weather events have increased, leading to recurrent disturbances in transmission lines because of wind deflection. These incidents have resulted in significant financial losses and have disrupted regular industrial and domestic activities. In this paper, the ANSYS Workbench 2020 R2 finite element analysis platform was used to establish a transmission line-hanging insulator string system model. Calculations on transmission lines were conducted considering variations in

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Li, Lingfeng, Hao Gu, Yanzhen Lv, Yunjing Zhang, Xingli He, and Peng Li. "Ultra-Fast Polarity Switching, Non-Radioactive Drift Tube for the Miniaturization of Drift-Time Ion Mobility Spectrometer." Sensors 22, no. 13 (2022): 4866. http://dx.doi.org/10.3390/s22134866.

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Drift-time ion mobility spectrometer (DT-IMS) is a promising technology for gas detection and analysis in the form of miniaturized instrument. Analytes may exist in the form of positively or negatively charged ions according to their chemical composition and ionization condition, and therefore require both polarity of electric field for the detection. In this work the polarity switching of a drift-time ion mobility spectrometer based on a direct current (DC) corona discharge ionization source was investigated, with novel solutions for both the control of ion shutter and the stabilization of ap

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Chen, Shen-Li, Pei-Lin Wu, and Yu-Jen Chen. "Robust ESD-Reliability Design of 300-V Power N-Channel LDMOSs with the Elliptical Cylinder Super-Junctions in the Drain Side." Electronics 9, no. 5 (2020): 730. http://dx.doi.org/10.3390/electronics9050730.

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The weak ESD-immunity problem has been deeply persecuted in ultra high-voltage (UHV) metal-oxide-semiconductor field-effect transistors (MOSFETs) and urgently needs to be solved. In this paper, a UHV 300 V circular n-channel (n) lateral diffused MOSFET (nLDMOS) is taken as the benchmarked reference device for the electrostatic discharge (ESD) capability improvement. However, a super-junction (SJ) structure in the drain region will cause extra depletion zones in the long drain region and reduce the peak value of the channel electric field. Therefore, it may directly increase the resistance of t

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Pathak, Manan, and Dishang Trivedi Trivedi. "Field-effect limits and design parameters for hybrid HVDC – HVAC transmission line corridors." Scientific Temper 16, Spl-1 (2025): 83–95. https://doi.org/10.58414/scientifictemper.2025.16.spl-1.12.

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The scientific evaluation of extra-high voltage (EHV) and ultra-high voltage (UHV) hybrid transmission lines presents essential research demands for power transmission systems’ efficiency. The high-capacity transmission lines need proper electric and magnetic field (EMF) management because public concerns about environmental and health risks keep rising. The relationship between power grid lines and surrounding areas needs thorough study to fulfill health-related requirements and earn public trust in power projects. The experiments demonstrated in Figure X show that strategic grounding with cl

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Mao, Xiaopo, and Xueming Zhou. "Research on splicing method of temperature distribution curve of EHV–UHV long string porcelain insulators." AIP Advances 12, no. 10 (2022): 105127. http://dx.doi.org/10.1063/5.0122746.

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The infrared thermal image detection method has unique advantages in the field of low zero value diagnosis of porcelain insulators. However, since the length of the extra–ultra-high voltage (EHV–UHV) porcelain insulator string can reach more than 10 m, it is difficult for common industrial thermal imagers/airborne lenses to clearly capture the infrared spectrum of the full string of EHV–UHV porcelain insulators. In order to solve this problem, this paper proposes a two-segment temperature curve splicing method based on weighted data fusion. The method avoids the problem of missing targets exis

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Chen, Kung-Chu, Kuan-Wun Lin, and Jenn-Gwo Hwu. "Influence of Outer Oxide Charges on the Electrostatics of Metal-Insulator-Semiconductor Tunnel Diode." ECS Meeting Abstracts MA2023-01, no. 33 (2023): 1851. http://dx.doi.org/10.1149/ma2023-01331851mtgabs.

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Metal-Insulator-Semiconductor Tunnel Diode (MISTD) has an ultra-thin oxide with thickness less than 3.5 nm. When a MISTD is biased higher than a critical voltage V C, the device will be driven into the deep depletion region [1]. In this biasing condition, the electrostatics of the device will deviate from the behavior of traditional metal-oxide-semiconductor capacitors with thick oxide [1]. Thus, finding out the critical voltage V C is important to predict the electrostatics of a MISTD. In this work, we found that there is a systematic deviation of V C between the theoretical and the experimen

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Belik, Milan, Vladyslav Kuchanskyy, and Olena Rubanenko. "The Method of the Secondary Arc Suppression in Cycle Single-Phase Auto Reclose with High-Level Penetration Renewable Energy Sources." Energies 16, no. 19 (2023): 6880. http://dx.doi.org/10.3390/en16196880.

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Renewable energy sources have a multifaceted impact on power grids, ranging from the reliability and quality of electricity to the selective impact on equipment. While renewables used to be distributed in distribution networks, now their capacity is commensurate with thermal power plants and their impact on the grid should not be underestimated. According to the statistics on the interruption of the bulk electric networks, one of the main reasons for emergency shutdowns of extra high-voltage power lines are single-phase short circuits. The problem of mathematical modeling of the limit modes in

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Yasuda, Hidehiro. "Ultra-high voltage electron microscopy." Journal of Japan Institute of Light Metals 64, no. 9 (2014): 433–37. http://dx.doi.org/10.2464/jilm.64.433.

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Hobbs, P. C. D. "Ultra-quiet high voltage source." IEEE Transactions on Instrumentation and Measurement 38, no. 5 (1989): 1004–5. http://dx.doi.org/10.1109/19.39044.

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Singh, R., S. Creamer, E. Lieser, S. Jeliazkov, and S. Sundaresan. "HIGH TEMPERATURE ULTRA HIGH VOLTAGE SIC THYRISTORS." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2010, HITEC (2010): 000167–73. http://dx.doi.org/10.4071/hitec-rsingh-tp25.

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Through a systematic study, Silicon Carbide Gate Turn Off (GTO) Thyristors with record performance are demonstrated. Several Anode-Gate interdigitation schemes (raster, hex and involute) were explored to investigate their effect on the static as well as switching characteristics. An optimized edge-termination was employed that resulted in the achievement of near-theoretical forward blocking voltages (&gt;8.1kV), and high yields (&gt;60% on 8mm×8mm) on GTO Thyristors with 60μm/5×1014 cm−3 voltage-blocking epitaxial layers. A low differential specific on-resistance of 2.55 mΩ-cm2, and lo

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Li, Yan. "Intelligent Control Technology of Ultra-High Voltage Grid." Journal of Advanced Computational Intelligence and Intelligent Informatics 23, no. 1 (2019): 67–71. http://dx.doi.org/10.20965/jaciii.2019.p0067.

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In order to ensure the stability and economy of ultra-high voltage grid in construction, we need to research the intelligent control method of ultra-high voltage grid. Using current method in ultra-high voltage grid construction, there is a problem of poor stability. Therefore, this paper proposed an intelligent control method of ultra-high voltage grid. This method analyzed the transmission capacity of power grid and electromagnetic loop operation, and used the genetic algorithm to compute the optimization model, finally analyzed the stability of the power frequency voltage completing the int

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Ning, Jin, and W. G. Kürten Ihlenfeld. "High Voltage Ultra-High Stability AC Voltage Amplifier Based on Magnetic Coupling." Applied Mechanics and Materials 48-49 (February 2011): 569–73. http://dx.doi.org/10.4028/www.scientific.net/amm.48-49.569.

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An alternating high voltage amplifier with four output ranges of 60/120/240/480V at power frequencies based on magnetic coupling and feedback compensation is presented. It is designed for calibration purposes. By the use of high quality transformers, a precise feedback loop and an error-correcting amplifier, a high gain stability and excellent performance over time is achieved. Its measured gain stability of amplitude and phase are within  0.2 V/V and  0.2 rad respectively over hours with a very low total harmonic distortion (THD) of 0.0022%.

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Watson, W. "Extra High Voltage AC Transmission Engineering." Electronics and Power 33, no. 1 (1987): 70. http://dx.doi.org/10.1049/ep.1987.0042.

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Peric, Dragoslav, and Miladin Tanaskovic. "Reliability of supply of switchgear for auxiliary low voltage in substations extra high voltage to high voltage." Tehnika 70, no. 6 (2015): 999–1004. http://dx.doi.org/10.5937/tehnika1506999p.

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R, Alamelu. "Ultra-High Voltage Boost Converter using Multistage Topology." International Journal for Research in Applied Science and Engineering Technology 13, no. 4 (2025): 3461–66. https://doi.org/10.22214/ijraset.2025.69022.

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This paper presents an Ultra-High Voltage Boost Converter using Multistage Topology that achieves ultrahigh voltage gain with minimal power losses. The proposed converter integrates a dual-stage boost converter, a coupled inductor, and a voltage multiplier cell, enabling efficient energy transfer and recycling of leakage energy. The converter ensures continuous input current, reduces voltage stress on power switches, and decreases passive component size. With its high voltage gain, high efficiency, and compact design, this converter is suitable for various applications, including renewable ene

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Adibi, M. M., R. W. Alexander, and D. P. Milanicz. "Energizing high and extra-high voltage lines during restoration." IEEE Transactions on Power Systems 14, no. 3 (1999): 1121–26. http://dx.doi.org/10.1109/59.780939.

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Babu, Thiruveedula Madhu, Kalagotla Chenchireddy, Jakkani Rohini, Mesaragandla Sai Suhas, Dara Ajitesh, and Kanaparthi Rahul. "High voltage DC-DC converter with standalone application." International Journal of Applied Power Engineering (IJAPE) 12, no. 4 (2023): 384–90. https://doi.org/10.11591/ijape.v12.i4.pp384-390.

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Designing DC-DC converters involves many voltage lift techniques. These techniques have been encouraged for their credible advantages. Most voltage lifting methods are applied in many areas of automotive, motor drives, telecom and electronic welfare in military applications. Voltage lifting techniques are known for their high voltage transfer gain and high efficiency. Ultra-lift converter yields very high output transfer gain with geometric progression compared to other voltage lift techniques such as super lift converters and classical boost converters. It also offers reduced size and improve

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Liu, Jinghui, Guangze Zhu, Tuo Xia, and Zhen Xu. "Safety Management of Ultra-high Voltage Substation Equipment Operation." International Journal of Mechanical and Electrical Engineering 4, no. 1 (2024): 46–52. https://doi.org/10.62051/ijmee.v4n1.07.

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Ultra-high voltage substation plays an important role in the modern power system. It is the transmission hub of power, connecting large power plants and end users. With the continuous expansion of power grid scale and the improvement of voltage level, the safety management of ultra-high voltage substation equipment operation is particularly important. Based from the characteristics of ultra-high voltage substation, this paper will systematically study and discuss the key links of equipment operation safety management, in order to provide useful reference for improving the safe and stable opera

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Djauhari, Fuad, Ruliyanta Ruliyanta, Raden Tegar Satria Putra, and Adhyartha Keraf. "Analysis of North Jakarta 500 kV Extra High Voltage Transmission Line using Shunt Reactor." Jurnal Ilmiah Giga 27, no. 2 (2025): 61–77. https://doi.org/10.47313/jig.v27i2.3539.

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To meet the need for electrical energy in Indonesia, especially in DKI Jakarta, PT PLN (Persero) built the Muara Karang Combined-Cycle Power Plant (CCPP), which has daily start-stop facilities with a capacity of 500 MW and 500 kV extra high voltage overhead lines between Muara Karang – Duri Kosambi is 30 km long. In high voltage and extra high voltage transmission lines, channel filling appears where the receiving side voltage is greater or smaller than the sending side voltage. This research aims to design a shunt reactor for reactive power compensation that can overcome the problem of voltag

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Song, Yi, and Wei Xiao. "Research on the Protection Scheme of a High-Speed Railway Crossing 1000 KV Ultra-High Voltage Transmission Line." Infrastructures 9, no. 7 (2024): 110. http://dx.doi.org/10.3390/infrastructures9070110.

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The high-speed railway project and the ultra-high-voltage transmission project represent two crucial components of China’s “new infrastructure”. As the construction of these two projects progresses rapidly, it is inevitable that instances of intersections will occur. Extreme conditions may cause damage to ultra-high voltage transmission cables. When a high-speed train passes by an ultra-high voltage transmission line, it poses a serious safety hazard. To address this issue, engineering examples were utilized to examine the protection structure scheme, protection distance, protection load, and

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47

Babu, Thiruveedula Madhu, Kalagotla Chenchireddy, Jakkani Rohini, Mesaragandla Sai Suhas, Dara Ajitesh, and Kanaparthi Rahul. "High voltage DC-DC converter with standalone application." International Journal of Applied Power Engineering (IJAPE) 12, no. 4 (2023): 384. http://dx.doi.org/10.11591/ijape.v12.i4.pp384-390.

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<span lang="EN-US">Designing DC-DC converters involves many voltage lift techniques. These techniques have been encouraged for their credible advantages. Most voltage lifting methods are applied in many areas of automotive, motor drives, telecom and electronic welfare in military applications. Voltage lifting techniques are known for their high voltage transfer gain and high efficiency. Ultra-lift converter yields very high output transfer gain with geometric progression compared to other voltage lift techniques such as super lift converters and classical boost converters. It also offers

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Isabella, Olindo, Liqi Cao, Paul Procel, et al. "(Invited) Interface Treatments for High-Efficiency MoO_x Based Silicon Heterojunction Solar Cells." ECS Meeting Abstracts MA2023-02, no. 44 (2023): 2189. http://dx.doi.org/10.1149/ma2023-02442189mtgabs.

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Silicon based solar cells dominate the market of photovoltaics, which hold the highest potential for green electricity production. A front/back-contacted architecture combined with the silicon-based heterojunction (SHJ) concept realized a world record efficiency of 26.3%1. However, conventional silicon-based doped layers, which work as carrier selective transport layers, are not optically transparent. Transition metal oxides are promising candidates for SHJ solar cells due to their advantageous opto-electronic properties. Molybdenum oxide (MoOx) with high work function (WF) has achieved highly

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Dewayalage, Imanka, Duane A. Robinson, Sean Elphick, and Sarath Perera. "Measurement of High-Frequency Voltage Harmonics above 2 kHz in High-Voltage Networks." Energies 17, no. 4 (2024): 892. http://dx.doi.org/10.3390/en17040892.

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Large-scale renewable energy plants, flexible AC (alternating current) and high voltage DC (direct current) transmission systems, and modern consumer devices utilize power electronics that tend to increase harmonic emissions. Furthermore, such emissions are nowadays known to exceed the traditional 2 kHz range typically considered for harmonic analysis. However, the accuracy of such harmonic measurements in medium and high voltage networks is questionable due to the lack of accuracy specifications for the respective instrument transformers that are being used in the measurement chain. Therefore

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Gómez, S., M. P. Buitrago, and F. A. Roldán. "Portable High Voltage Impulse Generator." Ingeniería e Investigación 31, no. 2SUP (2011): 159–64. http://dx.doi.org/10.15446/ing.investig.v31n2sup.25228.

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This paper presents a portable high voltage impulse generator which was designed and built with insulation up to 20 kV. This design was based on previous work in which simulation software for standard waves was developed. Commercial components and low-cost components were used in this work; however, these particular elements are not generally used for high voltage applications. The impulse generators used in industry and laboratories are usually expensive; they are built to with stand extra high voltage and they are big, making them impossible to transport. The proposed generator is portable,

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