Pub Date : 2022-09-25DOI: 10.1109/ICHVE53725.2022.9961778
Dan Zhou, Xian Yang, Zhiqin Ma, L. Cai, Bin Tai, Duan-ling Li, Yuhui Jin, Chunyao Lin, Shuo Jiang, Xiang Shu, Hao Liu, Guo-ming Ma
Acoustic detection is one of the main methods to detect partial discharge (PD) in the power transformer. The arrangement of ultrasonic sensors is the key factor affecting the accuracy of partial discharge detection. Therefore, it is necessary to understand the ultrasonic propagation characteristics of the transformer. In this paper, the 3-D simulation model of the 220 kV transformer was established. The propagation of the PD ultrasonic signal and the acoustic pressure distribution on the surface of the transformer were studied by using the finite element method. The simulation results show that when the partial discharge occurs, the ultrasonic signal spreads rapidly in the form of a spherical wave. Then the ultrasonic wave will deform and attenuate due to the influence of propagation distance and sound velocity. Besides, the pressure distribution on the surface of the tank caused by PD ultrasound shows that the PD source is the center of the ultrasound outward diffusion. The simulation and analysis results in this paper can provide a basis for determining the layout scheme of the transformer PD ultrasonic sensors.
{"title":"Ultrasonic Simulation Analysis of Transformer Partial Discharge Based on Discontinuous Galerkin Method","authors":"Dan Zhou, Xian Yang, Zhiqin Ma, L. Cai, Bin Tai, Duan-ling Li, Yuhui Jin, Chunyao Lin, Shuo Jiang, Xiang Shu, Hao Liu, Guo-ming Ma","doi":"10.1109/ICHVE53725.2022.9961778","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961778","url":null,"abstract":"Acoustic detection is one of the main methods to detect partial discharge (PD) in the power transformer. The arrangement of ultrasonic sensors is the key factor affecting the accuracy of partial discharge detection. Therefore, it is necessary to understand the ultrasonic propagation characteristics of the transformer. In this paper, the 3-D simulation model of the 220 kV transformer was established. The propagation of the PD ultrasonic signal and the acoustic pressure distribution on the surface of the transformer were studied by using the finite element method. The simulation results show that when the partial discharge occurs, the ultrasonic signal spreads rapidly in the form of a spherical wave. Then the ultrasonic wave will deform and attenuate due to the influence of propagation distance and sound velocity. Besides, the pressure distribution on the surface of the tank caused by PD ultrasound shows that the PD source is the center of the ultrasound outward diffusion. The simulation and analysis results in this paper can provide a basis for determining the layout scheme of the transformer PD ultrasonic sensors.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115744785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The calculation of multi-physical fields of power equipment is an important technology to support the digitization and the transparency of internal characteristics. The existing finite element simulation technology can't meet this demand. Therefore, this paper adopts the response surface method, which is driven by data to realize the fast analysis of GIL temperature distribution. The electro-thermal coupling simulation model is established to obtain the temperature field as the input data. The distribution characteristics of temperature field are calculated by response surface fitting. The results show that this method can quickly and effectively calculate the temperature field distribution of GIL. When the number of input data points is sufficient, the accuracy can be within 2%. The research results can provide reference and support for fast calculation of equipment, digital twin model construction and state early warning.
{"title":"Study on electro-thermal coupling characteristics of GIL and it fast calculation method","authors":"Zehua Wu, Yutong Zhang, Sijia Zhu, B. Cui, Haoran Wang, Shengwu Tan, Peng Liu, Zongren Peng","doi":"10.1109/ICHVE53725.2022.9961412","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961412","url":null,"abstract":"The calculation of multi-physical fields of power equipment is an important technology to support the digitization and the transparency of internal characteristics. The existing finite element simulation technology can't meet this demand. Therefore, this paper adopts the response surface method, which is driven by data to realize the fast analysis of GIL temperature distribution. The electro-thermal coupling simulation model is established to obtain the temperature field as the input data. The distribution characteristics of temperature field are calculated by response surface fitting. The results show that this method can quickly and effectively calculate the temperature field distribution of GIL. When the number of input data points is sufficient, the accuracy can be within 2%. The research results can provide reference and support for fast calculation of equipment, digital twin model construction and state early warning.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116764872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-25DOI: 10.1109/ICHVE53725.2022.9961688
Lei Wang, H. Mei, Shushan Wang, J. Liu, Dabing Chen, Liming Wang
The aging of composite insulators seriously affects the safety and stability of power systems. Thus, detecting the aging of the insulation materials by reliable methods is of great significance in reducing insulation failures. According to the Beer-Lambert law and considering the influence of nonlinear factors, the relationship between the absorption spectrum of high temperature vulcanized silicone rubber (HTVSR) in terahertz band and the contents of its main ingredients (polydimethylsiloxane (PDMS), alumina trihydrate (ATH), and silica) is modeled with the last-square support-vector-machine (LS-SVM) regression method. Then, the aging of HTVSR can be evaluated based on the contents of the main ingredients. Experimental results of both artificial thermal oxygen aging samples and actual insulator samples showed that the ATH content of HTVSR decreases significantly with aging. It is feasible to characterize the aging of HTVSR by detecting the contents of its main ingredients content based on the terahertz spectrum.
{"title":"The Main Component Content Detecting Method of Silicone Rubber in Aging Process Based on Terahertz Spectrum Characteristics","authors":"Lei Wang, H. Mei, Shushan Wang, J. Liu, Dabing Chen, Liming Wang","doi":"10.1109/ICHVE53725.2022.9961688","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961688","url":null,"abstract":"The aging of composite insulators seriously affects the safety and stability of power systems. Thus, detecting the aging of the insulation materials by reliable methods is of great significance in reducing insulation failures. According to the Beer-Lambert law and considering the influence of nonlinear factors, the relationship between the absorption spectrum of high temperature vulcanized silicone rubber (HTVSR) in terahertz band and the contents of its main ingredients (polydimethylsiloxane (PDMS), alumina trihydrate (ATH), and silica) is modeled with the last-square support-vector-machine (LS-SVM) regression method. Then, the aging of HTVSR can be evaluated based on the contents of the main ingredients. Experimental results of both artificial thermal oxygen aging samples and actual insulator samples showed that the ATH content of HTVSR decreases significantly with aging. It is feasible to characterize the aging of HTVSR by detecting the contents of its main ingredients content based on the terahertz spectrum.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116891761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-25DOI: 10.1109/ICHVE53725.2022.9961582
P. Mikropoulos, P. T. Tsouris, G. K. Aristotelous
Lightning impulse flashover characteristics of a typical 24 kV pin-type porcelain insulator are experimentally investigated aiming at a better understanding of the flashover mechanism as affected by the amplitude and polarity of the applied voltage. Flashover probability distributions under standard lightning impulses of both polarities were obtained and salient characteristics of the discharge inception, growth and flashover were measured. The insulator was overstressed to study the effects of the applied impulse voltage peak on discharge characteristics. Flashover occurs through a streamer-dominated mechanism involving however, necessarily, the inception of a small leader. Flashover characteristics are closely related to those of leader inception and growth; the latter is facilitated when overstressing the insulator. At relatively high applied voltages flashover occurs sooner and at lower voltages under negative than positive impulses.
{"title":"Experimental investigation of the lightning impulse flashover of a typical MV overhead line insulator","authors":"P. Mikropoulos, P. T. Tsouris, G. K. Aristotelous","doi":"10.1109/ICHVE53725.2022.9961582","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961582","url":null,"abstract":"Lightning impulse flashover characteristics of a typical 24 kV pin-type porcelain insulator are experimentally investigated aiming at a better understanding of the flashover mechanism as affected by the amplitude and polarity of the applied voltage. Flashover probability distributions under standard lightning impulses of both polarities were obtained and salient characteristics of the discharge inception, growth and flashover were measured. The insulator was overstressed to study the effects of the applied impulse voltage peak on discharge characteristics. Flashover occurs through a streamer-dominated mechanism involving however, necessarily, the inception of a small leader. Flashover characteristics are closely related to those of leader inception and growth; the latter is facilitated when overstressing the insulator. At relatively high applied voltages flashover occurs sooner and at lower voltages under negative than positive impulses.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116984513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Coupling agents can be key for the electrical performance of BN/ meta-aramid paper. In this article, triethoxy-silane coupling agents with different organophilic groups, including mercapto-propyl (MP), glycidylether-propyl (GP), amino-propyl (AP) and trideca-fluoro-octyl (TFO) were studied. The structural and electrical properties of modified papers were compared, and the molecular simulation was conducted to reveal the interface interaction of modified BN and aramid. The results show that AP and TFO have a better enhancing effect of insulation performance of composite paper than GP and MP. By choosing TFO and 15 wt% filler content, the optimal breakdown strength of paper was obtained as 28.17 kV /mm, 1.8 times that of the hydroxylated BN/ aramid paper.
{"title":"Effect of coupling agents on the electrical performance of BN/ meta-aramid composite paper","authors":"Hao-ou Ruan, Qing Xie, Jingxuan Song, Fanacheng Lü","doi":"10.1109/ICHVE53725.2022.9961333","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961333","url":null,"abstract":"Coupling agents can be key for the electrical performance of BN/ meta-aramid paper. In this article, triethoxy-silane coupling agents with different organophilic groups, including mercapto-propyl (MP), glycidylether-propyl (GP), amino-propyl (AP) and trideca-fluoro-octyl (TFO) were studied. The structural and electrical properties of modified papers were compared, and the molecular simulation was conducted to reveal the interface interaction of modified BN and aramid. The results show that AP and TFO have a better enhancing effect of insulation performance of composite paper than GP and MP. By choosing TFO and 15 wt% filler content, the optimal breakdown strength of paper was obtained as 28.17 kV /mm, 1.8 times that of the hydroxylated BN/ aramid paper.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117062022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-25DOI: 10.1109/ICHVE53725.2022.9961544
Qingjun Peng, Junhao Tang, Shan Wang, Dexu Zou, Z. Hong, Yong Shi, Yifeng Shi
Interturn short circuit of power transformer winding will lead to the saturation of transformer excitation, the increase of magnetic leakage and overcurrent, and it will damage the internal structure of transformer, even causes burning accident. According to statistics, winding interturn short circuit accounts for about 50%~60% of all transformer winding faults. In order to map its interturn short circuit process, the existing models of transformer mostly utilize finite element method. According to this typical faults that cause singular points of physical quantities, the finite element model of transformer is established to simulate the transient characteristics and steady-state characteristics. The method of setting short-circuit faults in the finite element model of transformers is studied in this paper. The finite element coupling models of transformer is obtained, the interaction effect and coupling mechanism of physical fields under interturn short circuit fault conditions in which are in-line with already existing results. The distribution law of physical quantities and the constraint relation of fault parameters are revealed.
{"title":"Simulation Research on Interturn Short Circuit of Transformer Winding Based on Finite Element Method","authors":"Qingjun Peng, Junhao Tang, Shan Wang, Dexu Zou, Z. Hong, Yong Shi, Yifeng Shi","doi":"10.1109/ICHVE53725.2022.9961544","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961544","url":null,"abstract":"Interturn short circuit of power transformer winding will lead to the saturation of transformer excitation, the increase of magnetic leakage and overcurrent, and it will damage the internal structure of transformer, even causes burning accident. According to statistics, winding interturn short circuit accounts for about 50%~60% of all transformer winding faults. In order to map its interturn short circuit process, the existing models of transformer mostly utilize finite element method. According to this typical faults that cause singular points of physical quantities, the finite element model of transformer is established to simulate the transient characteristics and steady-state characteristics. The method of setting short-circuit faults in the finite element model of transformers is studied in this paper. The finite element coupling models of transformer is obtained, the interaction effect and coupling mechanism of physical fields under interturn short circuit fault conditions in which are in-line with already existing results. The distribution law of physical quantities and the constraint relation of fault parameters are revealed.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127379137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-25DOI: 10.1109/ICHVE53725.2022.9961629
Halil Ibrahim Uckol, Taylan Özgür Bilgiç, S. Ilhan
This paper presents a comparative investigation of AC, + DC, and - DC corona discharge pulse characteristics using machine learning (ML) algorithms. The corona discharges under different types of excitation are generated via a rod-plane elec-trode system with a constant gap spacing. The corona discharge pulses are recorded using a shunt resistor via an oscilloscope. After noise elimination from the discharge pulses, nine features extracted from the noise-free signals are inputted to several ML models to identify the corona discharges with respect to the voltage types. To increase the performance of a single model, ensemble learning, which is the combination of ML algorithms, is employed. It is observed that the corona discharge types are effectively identified with these features using ensemble learning with a high accuracy rate.
{"title":"Comparative Investigation of Corona Pulse Characteristics under DC and AC Voltages","authors":"Halil Ibrahim Uckol, Taylan Özgür Bilgiç, S. Ilhan","doi":"10.1109/ICHVE53725.2022.9961629","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961629","url":null,"abstract":"This paper presents a comparative investigation of AC, + DC, and - DC corona discharge pulse characteristics using machine learning (ML) algorithms. The corona discharges under different types of excitation are generated via a rod-plane elec-trode system with a constant gap spacing. The corona discharge pulses are recorded using a shunt resistor via an oscilloscope. After noise elimination from the discharge pulses, nine features extracted from the noise-free signals are inputted to several ML models to identify the corona discharges with respect to the voltage types. To increase the performance of a single model, ensemble learning, which is the combination of ML algorithms, is employed. It is observed that the corona discharge types are effectively identified with these features using ensemble learning with a high accuracy rate.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123746150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-25DOI: 10.1109/ICHVE53725.2022.9961737
Jiuxin Ma, Liang Yu, Lvheng Ren, Yixin Liao, Shoulong Dong, C. Yao
High-voltage square-wave nanosecond pulse generator has a broad application prospect in the fields of atmosphericn low-temperature plasma, biomedicine and power equipment detection. Pulse forming line is an effective way to realize high-voltage square-wave nanosecond pulse output. However, the existing technology is difficult to coordinate the contradiction between the fixed physical size of pulse forming line and the adjustable pulse width. To solve this problem, in this paper, a new multi-switch inductor energy storage forming line topology is proposed, and the time-space transmission process of electromagnetic waves in the transmission line is regulated by double switches, so as to realize the modulation of output pulse width. Based on the wave process analysis and multi-switch sequential logic control theory, the pulse width modulation method is analyzed, and the simulation verifies that the new topology has the capability of pulse width adjustment. The experimental results show that the proposed new type pulse generator can realize square wave short pulse output with rising time of 6 ns, adjustable pulse width of 9-20ns, repetition frequency of 200kHz and voltage amplitude of 5 kV.
{"title":"High Voltage Nanosecond Pulse Generator based on Inductive Energy Storage With Adjustable Pulse Width","authors":"Jiuxin Ma, Liang Yu, Lvheng Ren, Yixin Liao, Shoulong Dong, C. Yao","doi":"10.1109/ICHVE53725.2022.9961737","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961737","url":null,"abstract":"High-voltage square-wave nanosecond pulse generator has a broad application prospect in the fields of atmosphericn low-temperature plasma, biomedicine and power equipment detection. Pulse forming line is an effective way to realize high-voltage square-wave nanosecond pulse output. However, the existing technology is difficult to coordinate the contradiction between the fixed physical size of pulse forming line and the adjustable pulse width. To solve this problem, in this paper, a new multi-switch inductor energy storage forming line topology is proposed, and the time-space transmission process of electromagnetic waves in the transmission line is regulated by double switches, so as to realize the modulation of output pulse width. Based on the wave process analysis and multi-switch sequential logic control theory, the pulse width modulation method is analyzed, and the simulation verifies that the new topology has the capability of pulse width adjustment. The experimental results show that the proposed new type pulse generator can realize square wave short pulse output with rising time of 6 ns, adjustable pulse width of 9-20ns, repetition frequency of 200kHz and voltage amplitude of 5 kV.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123799923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-25DOI: 10.1109/ICHVE53725.2022.9961670
Yuming Wang, Jianyu Pan, Haibo Tang, Yushuang He, Qinglin Wang
Electric machines for civil aircraft must have high reliability. However, the harsh operating environment will challenge the machines' insulation system. For electric machines in aircraft, thermal aging is the main reason for insulation deterioration and result in the failure of the electrical machine. Partial discharge (PD) is an essential indicator in evaluating the insulation damage. This paper aims to clarify the PD characteristics of the machine winding before and after thermal aging for aircrafts. It firstly established a thermal aging platform and used a PD measurement circuit to study the behavior of the PD inception voltage (PDIV), phase-resolved PD (PRPD), and PD magnitude before and after thermal aging. The insulation capacitance (IC) of machine windings with different aging stages is also tested and compared with PD characteristics. Results show that thermal aging will decrease the PDIV of winding insulation and PD magnitude increases exponentially after thermal aging.
{"title":"Partial Discharge Characteristics of Electrical Aircraft Machine Winding after Thermal Aging","authors":"Yuming Wang, Jianyu Pan, Haibo Tang, Yushuang He, Qinglin Wang","doi":"10.1109/ICHVE53725.2022.9961670","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961670","url":null,"abstract":"Electric machines for civil aircraft must have high reliability. However, the harsh operating environment will challenge the machines' insulation system. For electric machines in aircraft, thermal aging is the main reason for insulation deterioration and result in the failure of the electrical machine. Partial discharge (PD) is an essential indicator in evaluating the insulation damage. This paper aims to clarify the PD characteristics of the machine winding before and after thermal aging for aircrafts. It firstly established a thermal aging platform and used a PD measurement circuit to study the behavior of the PD inception voltage (PDIV), phase-resolved PD (PRPD), and PD magnitude before and after thermal aging. The insulation capacitance (IC) of machine windings with different aging stages is also tested and compared with PD characteristics. Results show that thermal aging will decrease the PDIV of winding insulation and PD magnitude increases exponentially after thermal aging.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116073858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-25DOI: 10.1109/ICHVE53725.2022.9961640
Binqiang Xia, Lei Wang, Xiangyu Gao, Liang Mu, Zheng Ma
Oil-SF6 bushing is the one of the most important equipment connecting GIS (Gas Insulated Switchgear) and transformer, and the simulation model of Oil-SF6 bushing is the key for the evaluation of VFFO level of GIS substation or in pumped-storage power station. For this purpose, many VFFO tests are carried out on the full operating condition testing platform, and measured waveforms of overvoltage on the UHV oil-SF6 bushing are available. Secondly, the capacitance of UHV oil-SF6 bushing is analyzed and calculated, and three models of bushing—simplified transmission line model, lumped model and multiple equivalent layers model, are put forward. Compared with measurement acquired from the test and results from simulation, the model of transmission line combined with lumped capacitance is recommended for the evaluation of VFFO, with which the waveform of overvoltage at the entrance of transformer can be further calculated.
{"title":"Test and Modeling Study of Oil-SF6 Bushing under VFFO","authors":"Binqiang Xia, Lei Wang, Xiangyu Gao, Liang Mu, Zheng Ma","doi":"10.1109/ICHVE53725.2022.9961640","DOIUrl":"https://doi.org/10.1109/ICHVE53725.2022.9961640","url":null,"abstract":"Oil-SF6 bushing is the one of the most important equipment connecting GIS (Gas Insulated Switchgear) and transformer, and the simulation model of Oil-SF6 bushing is the key for the evaluation of VFFO level of GIS substation or in pumped-storage power station. For this purpose, many VFFO tests are carried out on the full operating condition testing platform, and measured waveforms of overvoltage on the UHV oil-SF6 bushing are available. Secondly, the capacitance of UHV oil-SF6 bushing is analyzed and calculated, and three models of bushing—simplified transmission line model, lumped model and multiple equivalent layers model, are put forward. Compared with measurement acquired from the test and results from simulation, the model of transmission line combined with lumped capacitance is recommended for the evaluation of VFFO, with which the waveform of overvoltage at the entrance of transformer can be further calculated.","PeriodicalId":125983,"journal":{"name":"2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122720226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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