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Journal articles on the topic 'High voltage switchgear'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Pan, Qize, Fang Yang, Xiaoliang Tang, Zhi Yang, and Shulin Liu. "Simulation environment design for the investigation of damping and dewing mechanisms in the 12kV high-voltage switchgear." E3S Web of Conferences 53 (2018): 03001. http://dx.doi.org/10.1051/e3sconf/20185303001.

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The phenomenon of dampness and dewing inside the switchgear can improve the occurrence of serious equipment faults. Based on it, this paper, starting from the occurrence mechanism of dampness and dewing of the switchgear, summarizes the main techniques that can prevent and control them, and the merits and demerits of them are analysed. After that, based on the mechanism investigation of damping and dewing of 12kV switchgear, a simulation environment is designed in order to investigate the mechanism of damping and dewing the 12kV switchgear. Firstly, the entire simulation environment factors are given. Then, the prototype of this switchgear is designed, including base configuration and sensor installation configuration. In addition, the simulation environment of the distribution room, the switchgear with load operating conditions, several commonly used anti-dampness and anti-dewing methods of 12kV switchgear, and the rotary dehumidifier are designed. Lastly, prospects are given. This paper can provide some references for studying of damp-proofing and anti-dewing of 12kV switchgears.

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2

Yuan, Shun, Wei Wang, and Feng Li. "Simulation of Internal Arcing in High Voltage Switchgear Based on Fluent." Advanced Materials Research 383-390 (November 2011): 4346–51. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.4346.

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Internal arcing faults in the high voltage switchgear may cause serious damage to the equipment and fatal injury to personnel. To simulation the fault arcs based on appropriate calculation methods can not only shorten the development period of arc resistant switchgear, but also save the development cost. In this paper, based on KYN28-12(Z) switchgear, three-dimensional mathematical model of pressure relief channel of circuit breaker chamber in switchgear is established by using the GAMBIT software, then simulate the process of internal arcing in switchgear by adopting FLUENT software. The influence of the length and depth of pressure relief vent, also the loading position of arc discussed in the simulation.

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3

Song, Jiajia, Jinbo Zhang, and Xinnan Fan. "Device for online monitoring of insulation faults in high-voltage switchgears." International Journal of Distributed Sensor Networks 17, no. 2 (February 2021): 155014772199928. http://dx.doi.org/10.1177/1550147721999284.

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Partial discharges are the major cause of deterioration in the insulation characteristics of switchgears. Therefore, timely detection of partial discharge in switchgear and potential insulation faults is an urgent problem that needs to be addressed in the power supervision industry. In this study, a device was proposed for online monitoring of high-voltage switchgears based on pulse current method and ozone (O3) detection. The pulse current method obtains the PD signal by monitoring the phase holes on the switch indicator. Occurrence of a partial discharge in a certain phase leads to the production of a discharge pulse, which can be coupled out by a capacitive sensor. The current spectrum and the O3 produced by partial discharge were processed via fast Fourier transform for accurate diagnosis of the occurrence of partial discharge and its severity in switchgears. The proposed method allows for convenient acquisition of the partial discharge signal, simple installation of the device, and realization with inexpensive sensors.

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4

Götte, N., M. Bendig, T. Krampert, and P. G. Nikolic. "Switching Behaviour of a Series Connection of a Vacuum Interrupter and a Gas Circuit Breaker." Plasma Physics and Technology Journal 6, no. 3 (November 29, 2019): 223–26. http://dx.doi.org/10.14311/ppt.2019.3.223.

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After being in the focus of sciences' and industry's research and development activities for many years, the investigation of possible SF<sub>6</sub> gas-alternatives has been even more intensified after the revision of the European F-Gas regulation 517/2014. As natural gases yield a significantly lower dielectric strength in comparison to SF<sub>6</sub>, new challenges arise for the design of high voltage switchgear. Vacuum interrupters are environmentally friendly, reliable and able to withstand steep rising transient recovery voltages. In the last years, first installations of switchgear based on vacuum switching technology in sub-transmission level are in operation. One option for the realization of a SF<sub>6</sub> free high voltage switchgear for transmission level is the combination of a gas circuit breaker filled with an atmospheric gas with a vacuum interrupter in a hybrid switchgear. In this contribution the voltage distribution and switching behavior of a hybrid circuit breaker is experimentally investigated.

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5

Xu, Shu Yu, and Jing Qin Wang. "Study on the Prior Information Credibility Test in Low-Voltage Switchgear Reliability Assessment." Applied Mechanics and Materials 704 (December 2014): 180–85. http://dx.doi.org/10.4028/www.scientific.net/amm.704.180.

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Reliability Assessment of low-voltage switchgear is of great significance to the safety of power system and its equipment. In this thesis, Bayes theory is introduced into the reliability Assessment of low-voltage switchgear. The main failure modes and failure rate of low-voltage switchgear has been summarized, and the fault arrangement diagram of low voltage switchgear is given in this paper. In view of the low-voltage switchgear with high reliability and relatively large number of samples, a feasible compatibility test method is proposed. Firstly, the distribution type can be tested through engineering experience and Goodness of fit test for weibull distribution. Then a prior information compatibility test is carried out by Wilcoxon rank sum test and Kolmogorov-Smirnov nonparametric test method. Finally, the prior information which is incompatible with credible site information is removed and reliable prior information is obtained. This paper lays a solid foundation for the Low-voltage switchgear reliability assessment based on Bayes theory.

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6

Wang, Wei, Hong-jie Shi, Lin Yan, Tao Jin, Da-wei Wang, Shu Niu, and Wen-biao Tao. "Online monitoring of high-voltage switchgear installation." Journal of Engineering 2019, no. 16 (March 1, 2019): 1238–40. http://dx.doi.org/10.1049/joe.2018.8848.

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7

Goodwin, W. D. "High-voltage auxiliary switchgear for power stations." Power Engineering Journal 3, no. 3 (1989): 145. http://dx.doi.org/10.1049/pe:19890027.

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8

Et. al., R. Durga Rao,. "Nanocrystalline based Mitigation Technique for Very Fast Transient over Voltages in Gas Insulated Substations." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 2 (April 10, 2021): 1025–39. http://dx.doi.org/10.17762/turcomat.v12i2.1117.

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: in gas insulated substations, issue of very fast transient over voltages is very familiar problem because of its effects on live ultra-high voltage equipment. During switching events of disconnectors and circuit breakers prestrikes and restrikes occur due to which voltage transients propagate through gas insulated switchgear. Reflection retraction of these transients increases voltage magnitude and generates very high frequency oscillations. Mitigation or suppression of these voltage transients is important to protect equipment and their dielectric strength and insulation. Due to very high frequency stress, they wield on the apparatus and their magnitude (up to 3.5pu), they create an important problem in the design of ultra-high voltage Gas Insulated Substations. In this paper nanocrystalline based mitigation technique for VFTOs is presented. Nanocrystalline rings can be placed around inner conductor of GIS switchgear. This method of mitigation technique is investigated with four ultra-high voltage substations simulation test setup. Simulation results are presented in MATLAB/SIMULINK

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9

Roder, D. W. "Seismic withstand capability of high-voltage switchgear equipment." European Transactions on Electrical Power 5, no. 1 (September 6, 2007): 33–40. http://dx.doi.org/10.1002/etep.4450050105.

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10

Ji, Tong, Wei Xie, Xiaoqing Wang, and Jinbo Zhang. "The research of high voltage switchgear detecting unit." IOP Conference Series: Materials Science and Engineering 222 (July 2017): 012021. http://dx.doi.org/10.1088/1757-899x/222/1/012021.

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11

Wang, Jing-Qin, Zhi-Gang Zhang, Ching-Hsin Wang, and Li Wang. "A Maximum Entropy Multisource Information Fusion Method to Evaluate the MTBF of Low-Voltage Switchgear." Discrete Dynamics in Nature and Society 2018 (2018): 1–7. http://dx.doi.org/10.1155/2018/2746871.

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When analyzing the reliability of low-voltage switchgear by Bayesian method, the maximum entropy multisource information fusion method was proposed to obtain the prior information of low-voltage switchgear and then evaluate the reliability. The historical data of low-voltage switchgear was collected and organized from a manufacturer. According to the expert experience and the data, the creditability analysis and the compatibility test were presented by the Smirnov test method. Based on the high creditability and compatibility, the result of the maximum entropy multisource information fusion method is the determination of prior information. Therefore, the distribution type of the prior information was confirmed by using the maximum entropy method, and the parameter of the prior information was received by bootstrap method with MATLAB. Then the posterior distribution was obtained to evaluate the MTBF of low-voltage switchgear. Finally, the historical data of years from 2007 to 2010 was taken as prior information to illustrate the maximum entropy multisource information fusion method and to get the MTBF of low-voltage switchgear. The evaluation result reduces the experimental period and test cost, which is an improvement for the reliability evaluation and management of low-voltage switchgear and also an improvement for other systems with simple sample data. Compared with traditional Bayesian networks, the proposed method can fuse experts experience and historical data and has advantages for the use of prior information effectively.

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12

Bohnert, Klaus, Mathias Ingold, and Jadran Kostovic. "Fiber-optic voltage sensor for SF_6 gas-insulated high-voltage switchgear." Applied Optics 38, no. 10 (April 1, 1999): 1926. http://dx.doi.org/10.1364/ao.38.001926.

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13

Feng, Kai, Zhan Feng Ying, Jun Ji Wu, and Yun Yun Chen. "Temperature Measurement System within the High-Voltage Switchgear Based on Wireless Networking Technology." Advanced Materials Research 516-517 (May 2012): 1536–39. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.1536.

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Based on the study of equipment condition monitoring problem in smart grid. Make an improvement to traditional wireless temperature measurement system within high voltage switchgear, according to electromagnetic shielding problem within switchgear and energy wastage problem of AD sampling method, proposes a new type of wireless network communication mode group and RC circuit temperature measurement method. Testing results in laboratory shows a promotion in terms of data accuracy and communication reliability, and a significantly energy-saving effect relative to traditional methods.

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14

Xu, Cheng, Jia Xiang Sun, Jin Gang Wang, and Yi Luo. "Study of Fault Arc Protection Based on UV Pulse Method in High Voltage Switchgear." Advanced Materials Research 853 (December 2013): 641–45. http://dx.doi.org/10.4028/www.scientific.net/amr.853.641.

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Based on the relationship between electrical equipment discharge and ultraviolet radiation, this paper proposed the use of UV pulse method to detect switchgear arcing faults. Switchgear protection system based on this new technique detects arcing faults by analyzing the ultraviolet produced by electric arc. The technique was implemented and tested in laboratory, and results verified the performance of the protection system; its capable to calculate the number of UV pulses and cut off faults fast and precisely.

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15

Abdikulova, Z. K., and E. O. Zhaparov. "СALCULATION AND CHOICE OF ELECTRIC CHART OF SUBSTATION OF THE КENTAU TRANSFORMER PLANT." BULLETIN Series of Physics & Mathematical Sciences 70, no. 2 (June 30, 2020): 141–48. http://dx.doi.org/10.51889/2020-2.1728-7901.21.

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Electric supply system in enterprises must provide with electrical supply continuity and reliability as in normal and accidental regimes, quality electro energetic, production efficiency, so in connection with these in the article there have been analyzed work regimes of substations, studied electrical net scheme for Kentau Transformer Plant’s substation, calculated plant’s loads and short circuit currents and on the base of the calculated results curried out inspection for the chosen equipment. The number of connections, reliability of power supply and prospects for development are the determining factors for choosing the electrical scheme of high-voltage switchgears. You also need to take into account the need to conduct audits and tests of switches without interruption. In our case, we have four connections: two communication lines with electrical systems and two transformers. The distribution devices of the substation of the Kentau transformer plant are connected to the transformers according to a block scheme. Electrical installations are connected to the network transformer unit or receive backup power from another substation, since in case of failure of one network, both transformers can not work with the rest of the network. Based on this, measures are proposed for the reconstruction of the substation, with the replacement of the block diagram of the switchgear with the circuit for connecting the power transformer to the switchgear by a bus bridge. Offered measurements on reconstruction of the substation by replacing block scheme of switchgears to scheme of power transformer connection with DD bus bridge. Worked out main modernization problems of the substation switchgear, done calculation and selection of distributing bus bars for arranging switchgear.

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16

Shiratsuki, Akihide, Tomohito Mori, Haruhiko Kohyama, Hajime Nakajima, Toshiro Nakashima, Toru Oka, and Kazuhiko Sumi. "Development of Isolated Travel Sensor for High-voltage Switchgear." IEEJ Transactions on Fundamentals and Materials 129, no. 8 (2009): 513–19. http://dx.doi.org/10.1541/ieejfms.129.513.

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17

Riechert, Uwe, and Walter Holaus. "Ultra high-voltage gas-insulated switchgear - a technology milestone." European Transactions on Electrical Power 22, no. 1 (May 18, 2011): 60–82. http://dx.doi.org/10.1002/etep.582.

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18

Xian, Zhang, Xiong Qian, Cheng Changkui, Li Yuzhe, Liao Liangliang, Shi Shuang, and Liu Yobo. "State Evaluation Model of High voltage Switchgear Based on Fuzzy Set-valued Statistical Method and Kernel Vector Space Model." E3S Web of Conferences 252 (2021): 02007. http://dx.doi.org/10.1051/e3sconf/202125202007.

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The traditional high voltage switchgear (HVS) state evaluation model mostly adopts electrical test, live detection and historical data, neglecting the influence of real-time operation data of HVS composition equipment on the state evaluation results. This paper proposes a HVS operation state evaluation model based on fuzzy set-valued statistics method and kernel vector space model based on electrical test data and on-line monitoring data. First of all, according to the components of high voltage switchgear, the operation state of HVS is described and the evaluation index system is established. Secondly, the fuzzy set-valued statistics method is used to construct the mathematical model of evaluation index weight. Then, the kernel vector space model is introduced, and the Gaussian kernel function is used to map the sample to the features of the high-dimensional feature space. The indicator vector of the sample data and the ideal indicator vector of the high-voltage switchgear operation status level standard are defined in the high-dimensional feature space, and the angle-weighted cosine between the two vectors is calculated as the closeness of the sample to the standard status level, and then the high-voltage switchgear operation status level is obtained. Finally, the real data of a power supply company in western China are simulated. The results show that the greater the closeness degree is, the closer the HVS corresponding to the sample is to the normal state, on the contrary, the smaller the closeness degree is, the closer the HVS is to the fault state.

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19

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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20

Wang, Jingang, Cheng Xu, and Jiaxiang Sun. "Experimental Study of Fault Arc Protection Based on UV Pulse Method in High Voltage Switchgear." International Journal of Emerging Electric Power Systems 15, no. 3 (June 1, 2014): 247–52. http://dx.doi.org/10.1515/ijeeps-2013-0151.

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Abstract Based on the relationship between electrical equipment discharge and ultraviolet radiation, this paper proposed the use of UV pulse method to detect switchgear arcing faults. Switchgear protection system based on this new technique detects arcing faults by analyzing the ultraviolet produced by electric arc. This technique was implemented and tested in laboratory, and the performance of the protection module was verified: it is capable of calculating the number of UV pulses quickly and precisely, which indicates the intensity of fault arc, and therefore it can be applied to arcing faults protection system for detecting faults.

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21

Li, Wen-Yi. "Experimental Research on the Sensitivity of Partial Discharge Ultra High Frequency Sensor Structure Parameters." Journal of Nanoelectronics and Optoelectronics 16, no. 6 (June 1, 2021): 911–18. http://dx.doi.org/10.1166/jno.2021.3034.

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With the development of intelligent high voltage switch, online gas insulated switchgear discharge detection technology has been more and more widely applied. Because of the high sensing sensitivity and good antiinterference performance of build-in partial discharge sensor, it is currently required to install them on gas insulated switchgear products with voltage levels of 220 kV and above at the factory. The structural parameters of the build-in partial discharge sensor is of great importance to its sensing sensitivity. Therefore, in this paper, the influence of the structure change on the sensitivity of axisymmetric gas insulated switchgear build-in partial discharge sensor is experimentally studied. A practical gas insulated switchgear test model was established in the laboratory, and the frequency domain measurement system based on Spectrogram analyzer and synchronous sweep signal generator was adopted. By comparing the insertion loss generated by the build-in sensor when receiving sweep signal, the influence of structural parameter changes on the sensing sensitivity was analyzed. The results show that the diameter of the build-in sensor should be matched with the diameter of the hand-hole. The match of the larger diameter of the hand-hole and the smaller diameter of the sensor can increase the sensing sensitivity, but when the diameter of the sensor is close to the diameter of the hand-hole, the sensitivity will be significantly reduced. In addition, metal bolts with the sensor electrode and its insulating support fixed to the hand-hole cover can also result in a significant reduction in sensing sensitivity. Using the same measuring principle and system, the propagation attenuation characteristics of partial discharge ultra high frequency signal in gas insulated switchgear typical structures (linear and L-shaped structures) are also experimentally studied. The results show that the average attenuation of partial discharge ultra high frequency signal in gas insulated switchgear along the linear distance is 0.3 dB/m, and the attenuation through every L-shaped structure is 4.2 dB.

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22

Zhou, Lei, Hong Zhao, and Qing Zhao. "Design of Current Adjusting Device." Applied Mechanics and Materials 329 (June 2013): 316–19. http://dx.doi.org/10.4028/www.scientific.net/amm.329.316.

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The Temperature Rise Test of Low Voltage Switchgear Assembly has rather high requirements for the test equipment; however, the present test equipment commonly has the problem of complicated test circuits, current regulation difficulty, high power consumption etc [. Therefore, in order to raise the present test level, we have devised new test methods and designed a new type of current adjusting device for the Temperature Rise Test. This new type of device has the advantages of easy operation, compact structure, flexible motion, low power consumption, low cost, high precision etc. Practical application has proved that it can meet the technical requirements for the Temperature Rise Test of Low Voltage Switchgear Assembly.

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23

CAI, Yuanji, Yonggang GUAN, and Weidong LIU. "Statistical characteristics of transient enclosure voltage in ultra-high-voltage gas-insulated switchgear." Plasma Science and Technology 19, no. 6 (April 28, 2017): 064011. http://dx.doi.org/10.1088/2058-6272/aa65c7.

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24

Sun, Tao, Wei Wang, Shuji Yang, and Ling Li. "Dynamics of a High-voltage Switchgear System Excited by Earthquake." Journal of Electrical Engineering & Technology 15, no. 2 (February 11, 2020): 645–55. http://dx.doi.org/10.1007/s42835-020-00360-6.

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25

IRAWAN, R., G. B. SCELSI, and G. A. WOOLSEY. "OPTICAL FIBER SENSING OF SF6 DEGRADATION IN HIGH-VOLTAGE SWITCHGEAR." Journal of Nonlinear Optical Physics & Materials 10, no. 02 (June 2001): 181–95. http://dx.doi.org/10.1142/s021886350100053x.

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Sulphur hexafluoride ( SF 6) is used as an insulator in high-voltage systems. An electrical breakdown dissociates ( SF 6). Therefore, the insulating efficiency is degraded. If the ( SF 6) is not renewed, failure of the system can occur. A monitoring device for ( SF 6) loss is required, and an optical fiber sensor for continuous monitoring of ( SF 6) degradation in high-voltage switchgear has been developed. Dissociation products of the ( SF 6) discharge include HF and atomic F, both of which react readily with silica. This reactivity is utilized in our sensor, where etching of a glass fiber surface modifies the transmission characteristics of the fiber.

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26

李, 栋材. "Discussion on Lean Inspection of Ultra High Voltage Substation Switchgear." Smart Grid 08, no. 03 (2018): 226–33. http://dx.doi.org/10.12677/sg.2018.83026.

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27

Chen, Yingzi. "ZigBee Based Wireless Temperature Monitoring System of High-voltage Switchgear." IOP Conference Series: Materials Science and Engineering 382 (July 2018): 032034. http://dx.doi.org/10.1088/1757-899x/382/3/032034.

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28

Domoroshchyn, S., and O. Sakhno. "DEVELOPMENT OF RISK ANALYSIS METHOD OF HIGH VOLTAGE SWITCHGEAR MALFUNCTION." Electromechanical and energy saving systems 3, no. 51 (September 29, 2020): 41–52. http://dx.doi.org/10.30929/2072-2052.2020.3.51.41-52.

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29

Jin, Fang Yuan, Ling Ming Kong, Jue Long Li, Zong Jie Liu, Hai Feng Ye, and Xiu Chen Jiang. "Application and Improvement of a High Voltage Switchgear Partial Discharge Detecting and Positioning Technology." Applied Mechanics and Materials 448-453 (October 2013): 2011–15. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.2011.

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A new partial discharge online detecting equipment based on TEV method is introduced in this paper. Its application to 3~35kV metal-enclosed switchgear partial discharge detection is clarified by an instance. Advice for improvement is also presented.

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30

Kim, Joon-Ho, and Jin-O. Kim. "Analysis and Mitigation on Switching Transients of Medium-Voltage Low-Harmonic Filter Banks." Energies 13, no. 9 (May 1, 2020): 2187. http://dx.doi.org/10.3390/en13092187.

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This paper presents the switching transients of medium-voltage low-harmonic filter banks, which have alower back-to-back inrush current and higher transient recovery voltage (TRV) compared with capacitor banks. The switching transients of the filter banks are described by the analytical approach and field measurements for 150 MVA back-to-back filter banks are provided to support the switching phenomena described in this paper. As a mitigation measure of the high transient recovery voltage, a double-breaker type switchgear is analyzed in terms of the operating sequence and the time of the upper and lower breakers. From the analyses, an operation scheme for the double-breaker switchgear is proposed to avoid insulation failure of the breaker during the interruption by mitigating the transient recovery voltage across each breaker.

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31

Ibrahim, Visa Musa, Zulkurnain Abdul-Malek, and Nor Asiah Muhamad. "Status Review on Gas Insulated Switchgear Partial Discharge Diagnostic Technique for Preventive Maintenance." Indonesian Journal of Electrical Engineering and Computer Science 7, no. 1 (July 1, 2017): 9. http://dx.doi.org/10.11591/ijeecs.v7.i1.pp9-17.

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<p>Gas insulated switchgear (GIS) plays a vital role in high voltage transmission of electrical energy due to its advantages of high reliability and performance, compact in dimensions and outstanding compatibility with the environment. It uses sulphur hexafluoride gas as its insulant and coolant because of its high dielectric strength and excellent arc quenching ability. Gas insulated switchgear in operation suffers the challenge of its insulation decomposition and eventually failure due to the activities of partial discharge that arouses from defects. This failure is catastrophic and it will lead to entire power out stage that will affect all categories of human activities, so there is a need for Gas insulated switchgear condition monitoring and diagnoses in order to carry out preventive maintenance. This paper reviews diagnostic techniques and methods for Gas insulated switchgear insulation degradation caused by partial discharge for the purpose of carrying out preventive maintenance to avert its failure.</p>

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32

Liu, Shu Xin, Yun Dong Cao, Chun Guang Hou, Yang Liu, and Xiao Ming Liu. "Development of On-Line Monitoring System and Aging Characteristics Research of Switchgear." Applied Mechanics and Materials 330 (June 2013): 364–67. http://dx.doi.org/10.4028/www.scientific.net/amm.330.364.

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For improving reliable operation of switchgear in power system, an approach for on-line monitoring the insulation characteristic and bus-bar temperature rising of the switchgear is proposed in this paper. Through comparing several existing temperature measurement methods for monitoring temperature rising elevation at bus-bas, a new design of temperature monitoring method is proposed. It adopts quick-magnetic saturated current transformer, temperature sensor and infrared transmission to solve the problem of high voltage isolation. The epoxy resin insulation material which is commonly used in switchgear its aging mechanism data is not complete, seriously restrict on-line monitoring for switchgear, so thousands hours of aging experiment is done on switchgear, systematic study various electrical characteristics variation law on the gradual aging process of epoxy resin insulation materials. Therefore, study on the aging characteristics of switchgearinsulation and its lifetime estimation method is the key technology to understand agingmechanism better, search for new fault diagnostic method and the way to extend theuseful lifetime of switchgear. At last, the system runs in real system and the result shows the on-line monitoring system is stable and reliable which can be provide reference for on-line monitoring system design of switchgear.

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33

Xue, Wen. "Improved Method of High Voltage Switchgear Temperature Prediction Based on WNN." Applied Mechanics and Materials 644-650 (September 2014): 502–5. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.502.

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Based on WNN, an improved model of High Voltage Switchgear temperature prediction is built. The model is optimized with hard threshold de-noising with wavelet package analysis, made an ultra-short term prediction loosely combines Elman neural network. However, the characteristics of the original signal are reserved and the noise interference is mostly eliminated. The experiment results show the processed sample as input one improves the prediction accuracy of Elman Network and reduces the root-mean-square error. And the prediction values show good coincidence to the measured ones that improves the reliability of early warning.

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34

Shin, Jong-Yeol, Young-Sang Lee, and Jin-Woong Hong. "Partial Discharge Detection of High Voltage Switchgear Using a Ultra High Frequency Sensor." Transactions on Electrical and Electronic Materials 14, no. 4 (August 25, 2013): 211–15. http://dx.doi.org/10.4313/teem.2013.14.4.211.

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35

Wei, Xiao, Dali Li, Hongwei Zhu, and Kaijing Jia. "Research on High-precision Positioning Technology for Partial Discharge of High Voltage Switchgear." IOP Conference Series: Earth and Environmental Science 435 (February 7, 2020): 012025. http://dx.doi.org/10.1088/1755-1315/435/1/012025.

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36

Yu, Jun, Ning Li, Jinlian Zhao, and Reziya·Aierken. "Experimental Study on Multi-Channel Positioning Technology of High Voltage Switchgear." Journal of Physics: Conference Series 1518 (April 2020): 012011. http://dx.doi.org/10.1088/1742-6596/1518/1/012011.

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37

Du, Longji, Shi Zhang, Liming Chen, Jinglong Ye, Meiting Ma, Aidi Jia, Biao Ma, Aihong Ming, and Hefeng Liu. "Research on Image Processing Method of High Voltage Switchgear Temperature Measurement." IOP Conference Series: Earth and Environmental Science 440 (March 19, 2020): 032111. http://dx.doi.org/10.1088/1755-1315/440/3/032111.

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38

Ewaida, Ramadan Fayez, Nissar Rasool Wani, Yasin Khan, and Abdulrahman Ali Al-Arainy. "Defect Localization Inside Simulated MV Switchgear Based on Cumulative Energy Curve Using Transient Earth Voltage Sensors." Energies 14, no. 2 (January 8, 2021): 320. http://dx.doi.org/10.3390/en14020320.

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The partial discharge (PD) leads to catastrophic failure of the medium voltage (MV) switchgear insulation. Determination of the PD source (defect) location in high voltage (HV) equipment is very important in the maintenance procedures and in isolating the root cause of PD generation. In this paper, the transient earth voltage (TEV) detection method was used to acquire defect-initiated PD signals in a simulated MV switchgear model. An array of four TEV sensors were placed on the surface walls outside an MV switchgear tank to acquire the PD signals generated from the known location(s)/coordinates of sharp needle type defect inside the tank. The time difference of arrival (TDOA) between signals that are captured by the TEV sensors array was critically analyzed. Estimating the TDOA between PD signals generated by PD source at a known location with high accuracy is of great importance for accurate defect localization. The cumulative energy method (CEM) is used to estimate the onset time point of each TEV signal. The estimated TDOA by the cumulative energy method is compared with actual and expected TDOA based on known coordinates of PD source and TEV sensors. Experimental data are used as a basis for determining the TEV method accuracy for PD source localization. Experimental results show the average error of time difference is about 1.34 ns, which is equivalent to the propagation distance of 0.4 m.

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Ewaida, Ramadan Fayez, Nissar Rasool Wani, Yasin Khan, and Abdulrahman Ali Al-Arainy. "Defect Localization Inside Simulated MV Switchgear Based on Cumulative Energy Curve Using Transient Earth Voltage Sensors." Energies 14, no. 2 (January 8, 2021): 320. http://dx.doi.org/10.3390/en14020320.

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Abstract:

The partial discharge (PD) leads to catastrophic failure of the medium voltage (MV) switchgear insulation. Determination of the PD source (defect) location in high voltage (HV) equipment is very important in the maintenance procedures and in isolating the root cause of PD generation. In this paper, the transient earth voltage (TEV) detection method was used to acquire defect-initiated PD signals in a simulated MV switchgear model. An array of four TEV sensors were placed on the surface walls outside an MV switchgear tank to acquire the PD signals generated from the known location(s)/coordinates of sharp needle type defect inside the tank. The time difference of arrival (TDOA) between signals that are captured by the TEV sensors array was critically analyzed. Estimating the TDOA between PD signals generated by PD source at a known location with high accuracy is of great importance for accurate defect localization. The cumulative energy method (CEM) is used to estimate the onset time point of each TEV signal. The estimated TDOA by the cumulative energy method is compared with actual and expected TDOA based on known coordinates of PD source and TEV sensors. Experimental data are used as a basis for determining the TEV method accuracy for PD source localization. Experimental results show the average error of time difference is about 1.34 ns, which is equivalent to the propagation distance of 0.4 m.

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Ivanov, Dmitry A., Marat F. Sadykov, Danil A. Yaroslavsky, Aleksandr V. Golenishchev-Kutuzov, and Tatyana G. Galieva. "Non-Contact Methods for High-Voltage Insulation Equipment Diagnosis during Operation." Energies 14, no. 18 (September 9, 2021): 5670. http://dx.doi.org/10.3390/en14185670.

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The article describes a complex of non-contact methods for remote diagnosis of high-voltage insulators as well as the two-channel method for remote diagnostics of the operating state of high-voltage insulators, based on the registration of partial discharges by electromagnetic and acoustic sensors. The presented device allows visual inspection and searches for faulty high-voltage equipment and a remote non-contact method of recording high-intensity electric fields of industrial frequency and their spatial distribution based on the electro-optical effect. The scheme of using the system for monitoring and diagnosing the technical condition of high-voltage support insulators of open switchgear is described. The results of experimental studies confirm the possibility of industrial applicability of the proposed method for non-contact remote diagnostics of the state of high-voltage insulators under operating voltage.

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Simić, Ninoslav, Jovan Mrvić, and Ranko Jasika. "The possibility of the high voltage testing in renewable energy power facilities." Zbornik radova Elektrotehnicki institut Nikola Tesla 30, no. 30 (2020): 69–80. http://dx.doi.org/10.5937/zeint30-28647.

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The paper presents the possibility of using high voltage tests within frame of acceptance tests in the power facilities of renewable energy sources. The practical problems that present them to the examiners on site and the ways to overcome them are described. Special emphasis is given to the testing of power cables, because these tests are particularly on site demanding. Realistic test results of busbars and cells of metal-enclosed switchgear, power cables and surge arresters are presented with interpretations, comments and recommendations.

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Niu, Jun Hao, Cong Hu, and Xian Hua Yin. "Research on Monitoring System of Environment in Switchgear." Applied Mechanics and Materials 310 (February 2013): 560–63. http://dx.doi.org/10.4028/www.scientific.net/amm.310.560.

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When high voltage electrical equipment running in electrical transformer station, heating, electrical accident would be caused by some factors, for example, the temperature of switch node higher then alarm, discharge with high humidity, condensation of electrical equipment. Therefore, the implementation on-line monitoring for high voltage electrical equipment has become the important problem needed to solve. This paper analyzes the effect of node temperature and the humidity in the switchgear failure, and designs temperature/humidity environment monitoring terminal with low power controller and integrated temperature/humidity sensor. The RS485 interface is used as the communication channel to exchange information with monitor server. In monitor computer, a server is working to collect real time environment information from each terminal and provides web service for user in internet. Experimental results show that this system can realize the contact temperature and humidity environment online monitoring, display, alarm and other functions, and has good scalability and maintainability.

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Albano, Maurizio, A. Haddad, Huw Griffiths, and Paul Coventry. "Environmentally Friendly Compact Air-Insulated High-Voltage Substations." Energies 11, no. 9 (September 19, 2018): 2492. http://dx.doi.org/10.3390/en11092492.

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This paper investigates the possible options for achieving a substantial reduction in a substation footprint using air-insulated switchgear as a more environmentally-friendly alternative to gas-insulated substations that use SF6 gas. Adopting a new approach to surge arrester location and numbers, International Electrotechnical Commission (IEC) minimum clearances can be successfully selected instead of the maximum clearances as currently adopted by many utilities, as is the case in the UK. In addition, innovative alternative compact busbar arrangements using vertical and delta configurations have been proposed by the authors. A further opportunity for compaction is offered by the application of compact and integrated technology offered from several manufacturers. The full overvoltage control within the entire substation under any surge condition is a key aspect of the feasibility of this type of substation. This work demonstrates that the new design option can be an attractive alternative for future substation configuration with minimum footprint.

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Wang, Jiachen, Weidong Ding, Yishu Liu, Zhongbo Zheng, and Chongjian Ge. "Application of X-Ray Inspection for Ultra High Voltage Gas-Insulated Switchgear." IEEE Transactions on Power Delivery 34, no. 4 (August 2019): 1412–22. http://dx.doi.org/10.1109/tpwrd.2019.2903531.

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Chao, Zheng, Zheng Yongkang, Zhong Jun, Wang Yongfu, Zhao Zhang Haiyang, and Ren Bo. "Review of research on partial discharge detection techniques of high voltage switchgear." Journal of Physics: Conference Series 1550 (May 2020): 032084. http://dx.doi.org/10.1088/1742-6596/1550/3/032084.

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Wang, Fuzhong, Sumin Han, and Bin Cao. "A Hierarchical Fuzzy Comprehensive Evaluation Algorithm for Running State of a 6 kV (10 kV) Power Switch Cabinet." Mathematical Problems in Engineering 2018 (2018): 1–12. http://dx.doi.org/10.1155/2018/4517279.

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Considering the existence of many actual influential factors of a high voltage switch cabinet in the coal mine, the paper proposes a hierarchical fuzzy comprehensive evaluation algorithm to assess the running state of the 6 kV (10 kV) power vacuum switch cabinet better and improve operational safety and reliability of the power supply system. The algorithm can realize the state evaluation of bus bars, vacuum circuit breakers, electrical cables, other components, and the switch cabinet by the bottom-up approach. The running state evaluation index system and mathematical model of the switchgear are introduced particularly. According to the different forms of data information, this algorithm comprehensively evaluates the running state of the high voltage switchgear by using the online running data, test data, equipment information, and historical data records of the distribution cabinet. The actual operation states and test data of a handcart switch cabinet are taken as examples to prove the effectiveness of the algorithm.

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Hussain, Ghulam Amjad, Ashraf A. Zaher, Detlef Hummes, Madia Safdar, and Matti Lehtonen. "Hybrid Sensing of Internal and Surface Partial Discharges in Air-Insulated Medium Voltage Switchgear." Energies 13, no. 7 (April 5, 2020): 1738. http://dx.doi.org/10.3390/en13071738.

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Partial discharge (PD) measurements have proved their reliability for health monitoring of insulation systems in power system components including synchronous generators, power transformers, switchgear and cables etc. Online condition monitoring and pro-active detection of PD faults have been highly demanded over the last two decades. This paper provides results from a research project to develop advanced non-intrusive sensing technologies that are cost effective, reliable and efficient for early detection of PD faults in medium voltage (MV) and high voltage (HV) air-insulated switchgear. Three sensors (high frequency E-field (D-dot) sensor, Rogowski coil and loop antenna) have been developed and tested under various PD faults and their performance were evaluated in comparison with high frequency current transformer (HFCT) which is being used commercially for PD testing and measurement. Among these three sensors, it is shown that D-dot sensor and Rogowski coil are more dependable when it comes to the PD measurements due to their high signal to noise ratio and hence high accuracy. These sensors can be customized according to a specific application and can be connected together with one data acquisition device while developing an online condition monitoring system.

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Mikheev, Georgi M., and Ayrat G. Ziganshin. "THE DIGITALIZATION OF SUBSTATIONS BY CREATING A 6-35 kV SWITCHING DEVICESCONTROL SYSTEM FROM THE AUTOMATED WORKPLACE." Vestnik Chuvashskogo universiteta, no. 1 (March 25, 2021): 78–85. http://dx.doi.org/10.47026/1810-1909-2021-1-78-85.

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The control system of high-voltage switches at one of the substations of the branch of JSC «Grid Company» Buinskie Power Networks is presented in the work. The block control circuit of switching devices from the automated workplace is described. Its specific blocks with the help of which the whole process of switching of high-voltage switches in the switchgear – 10, 35 kV is performed are provided. An explanation of the collection and transfer of information from intelligent electronic devices to the switchgear drive, transmission of control commands, protocol conversion and data exchange with higher levels of automated systems is given. Advantages of the remote control system for 6-35 kV electrical apparatus are shown on the example of the 110/35/10 kV «Verkhny Uslon» substation of the Tatenergo system. The system of remote control of switchgear during its repair and in case of other emergency situations is opened on the example of one of the substations 110/35/10 kV of the Republic of Tatarstan. There are schemes KRUN-10, KRUN-35 kV with an illustration of the positions of electrical apparatus, combined with video surveillance of the state of the switch of a certain cell and the position of the earthing switch of a separate switching device.

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Dong, Tao, and Min Wang. "The Research of Virtual Design and Parts Library System Oriented to High Voltage Switchgear." Advanced Materials Research 403-408 (November 2011): 2663–66. http://dx.doi.org/10.4028/www.scientific.net/amr.403-408.2663.

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In this paper, a standardized method of virtual design for high voltage switchgear based on Inventor has been investigated. A multi-attribute and multi-method parts library system also has been designed and developed which was integrated seamlessly with the three-dimensional design software. This investigation can achieve visualization design for large-scale product, and effective management, integration and sharing for 3D models and design information. The design efficiency and the information level of the enterprise can be greatly improved, and the product development cycle can be greatly shorten.

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Kobayashi, Takayuki, Hideaki Chida, Hiroki Kajino, Norimitsu Kato, Makoto Hirose, and Takahiro Nishimura. "Overview of JEC-2390 Standard (General Requirements for High-voltage Switchgear and Controlgear)." IEEJ Transactions on Power and Energy 134, no. 10 (2014): 843–48. http://dx.doi.org/10.1541/ieejpes.134.843.

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