Pub Date : 2020-09-06DOI: 10.1109/ICHVE49031.2020.9279853
Yu Wang, S. Gu, Yuhe Fang, Yuangen Xu, Yang Chen, Peng Li
A compact electric field change meter combined the fast and slow electric field change measurement was developed. This paper presented the structure, the features and the calibration method of the instrument as well as the collected typical lightning discharges, including the return stroke and preliminary breakdown pulse train of cloud-to-ground lightning, the compact intracloud discharge, the conventional intracloud discharge and the continuing current. The application of the instrument for fault analysis of transmission lines, especially those caused by lightning return stroke and continuing current, and other non-contact measurement of transients were discussed and expected.
{"title":"Compact electric field change meter and its application in lightning detection and fault analysis for power grids","authors":"Yu Wang, S. Gu, Yuhe Fang, Yuangen Xu, Yang Chen, Peng Li","doi":"10.1109/ICHVE49031.2020.9279853","DOIUrl":"https://doi.org/10.1109/ICHVE49031.2020.9279853","url":null,"abstract":"A compact electric field change meter combined the fast and slow electric field change measurement was developed. This paper presented the structure, the features and the calibration method of the instrument as well as the collected typical lightning discharges, including the return stroke and preliminary breakdown pulse train of cloud-to-ground lightning, the compact intracloud discharge, the conventional intracloud discharge and the continuing current. The application of the instrument for fault analysis of transmission lines, especially those caused by lightning return stroke and continuing current, and other non-contact measurement of transients were discussed and expected.","PeriodicalId":6763,"journal":{"name":"2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)","volume":"32 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80443584","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 : 2020-09-06DOI: 10.1109/ICHVE49031.2020.9280011
Ruiyang Guan, Z. Jia
Arcing horn, which is a kind of rod-rod air gap, is usually parallel-installed on the insulator in the over-headlines in order to protect the insulator from being burnt by the fault arc. However, if the fault arc cannot be interrupted by the arcing horn in time, it will cause the operation of DC transmission systems unstable. So, it is necessary to do some researches on the characteristics of arc motion. Here, a magneto hydro dynamic (MHD) model was built to simulate the arc moving behaviors, as well as the mathematical model for dynamic DC arc in the arcing horn was analyzed. Three kinds of airflows, such as the cross-wind, the non-wind and the wind in 45° direction, were simulated to demonstrate the effects of airflows on the arc moving behaviors. The arc temperature, voltage, current and resistance were presented according to the MHD simulation model. Finally, some experiments were made to compare with the simulation results. Experimental results verify that the MHD simulation model is correct. The arc temperature is as high as 9000 K and it is not significantly different during the various evolution processes. The direction of airflow has much influence on the arc moving behaviors under three different conditions. The arc voltage and resistance are gradually increased while the arc current is decreased after 250 ms. This paper is useful for the researches of DC arc movement in the arcing horns.
{"title":"DC Arc Numerical Calculations and Experimental Researches Based on the Arcing Horn Used in Over-head Line","authors":"Ruiyang Guan, Z. Jia","doi":"10.1109/ICHVE49031.2020.9280011","DOIUrl":"https://doi.org/10.1109/ICHVE49031.2020.9280011","url":null,"abstract":"Arcing horn, which is a kind of rod-rod air gap, is usually parallel-installed on the insulator in the over-headlines in order to protect the insulator from being burnt by the fault arc. However, if the fault arc cannot be interrupted by the arcing horn in time, it will cause the operation of DC transmission systems unstable. So, it is necessary to do some researches on the characteristics of arc motion. Here, a magneto hydro dynamic (MHD) model was built to simulate the arc moving behaviors, as well as the mathematical model for dynamic DC arc in the arcing horn was analyzed. Three kinds of airflows, such as the cross-wind, the non-wind and the wind in 45° direction, were simulated to demonstrate the effects of airflows on the arc moving behaviors. The arc temperature, voltage, current and resistance were presented according to the MHD simulation model. Finally, some experiments were made to compare with the simulation results. Experimental results verify that the MHD simulation model is correct. The arc temperature is as high as 9000 K and it is not significantly different during the various evolution processes. The direction of airflow has much influence on the arc moving behaviors under three different conditions. The arc voltage and resistance are gradually increased while the arc current is decreased after 250 ms. This paper is useful for the researches of DC arc movement in the arcing horns.","PeriodicalId":6763,"journal":{"name":"2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)","volume":"11 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80637144","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 : 2020-09-06DOI: 10.1109/ICHVE49031.2020.9279521
Zhuoran Liu, Sen Wang, Bo Zhang, Yanchuan Cao, Donghui Luo, Wei Li
Reducing the transient grounding impedance of the grounding device is an important measure for lightning protection. However, due to the inductive reactance of the grounding electrode, the transient grounding impedance is usually very high. This paper analyzes the parameters that affect the inductive reactance of the grounding electrode, and studies the influence of the electrode radius on the inductive reactance. Considering the cost and the effective current leakage length of the grounding electrode, a method of reducing the transient grounding impedance is proposed. That is using a piece of grounding electrode with large radius near the current injection point of the grounding device, and then gradually reducing the radius along electrode. The effectiveness of the method is verified by numerical simulation, and the optimal arrangement is analyzed. It can be seen that the method can greatly increase the effective current leakage length of the grounding electrode and reduce the transient grounding impedance of the grounding device.
{"title":"Method for Reducing Impulse Grounding Impedance of Grounding Device by Using Grounding Electrode with Non-uniform Radius","authors":"Zhuoran Liu, Sen Wang, Bo Zhang, Yanchuan Cao, Donghui Luo, Wei Li","doi":"10.1109/ICHVE49031.2020.9279521","DOIUrl":"https://doi.org/10.1109/ICHVE49031.2020.9279521","url":null,"abstract":"Reducing the transient grounding impedance of the grounding device is an important measure for lightning protection. However, due to the inductive reactance of the grounding electrode, the transient grounding impedance is usually very high. This paper analyzes the parameters that affect the inductive reactance of the grounding electrode, and studies the influence of the electrode radius on the inductive reactance. Considering the cost and the effective current leakage length of the grounding electrode, a method of reducing the transient grounding impedance is proposed. That is using a piece of grounding electrode with large radius near the current injection point of the grounding device, and then gradually reducing the radius along electrode. The effectiveness of the method is verified by numerical simulation, and the optimal arrangement is analyzed. It can be seen that the method can greatly increase the effective current leakage length of the grounding electrode and reduce the transient grounding impedance of the grounding device.","PeriodicalId":6763,"journal":{"name":"2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)","volume":"62 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83146119","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 : 2020-09-06DOI: 10.1109/ICHVE49031.2020.9279899
Dapeng Zhang, P. Dang
Due to unbalanced energy distribution and economic development, high voltage, long distance power transmission have become one of the major development trends of modern power systems all over the world. The overhead conductors is an important transmission carrier in power system. Reduce line lose and increase transmission capacity of overhead conductors have become the research emphasis. The main affect factor of these overhead conductors performance is AC resistance. However, the AC resistance also affected by many complex factors like skin-effect, magnetic hysteresis and eddy current. The correctly calculated AC resistance of overhead conductors is the key to the energy-saving. In this paper, three kinds of the overhead conductors (Aluminum Conductors Steel Reinforced, Aluminum Conductors Aluminum-Clad Steel Reinforced and Aluminum Conductors Carbon fiber composite core) AC resistance model are built by numerical calculation. By using these model, the AC resistance is simulated calculate. Meanwhile, in order to verify the accuracy of simulation results, the AC resistance of overhead conductors are measured by test. The result show that the different between the simulated values and measured values are less. In addition, through the simulation and measurement results of AC resistance, the energy-saving performance of the three kinds of overhead conductors is also compared. When passing a large current, the AC resistance of Carbon fiber composite core wire is smaller than the other overhead conductors. The calculation can provide reference for the evaluation of AC loss in transmission lines.
{"title":"Study on AC Resistance of Overhead Conductors by Numerical Simulation","authors":"Dapeng Zhang, P. Dang","doi":"10.1109/ICHVE49031.2020.9279899","DOIUrl":"https://doi.org/10.1109/ICHVE49031.2020.9279899","url":null,"abstract":"Due to unbalanced energy distribution and economic development, high voltage, long distance power transmission have become one of the major development trends of modern power systems all over the world. The overhead conductors is an important transmission carrier in power system. Reduce line lose and increase transmission capacity of overhead conductors have become the research emphasis. The main affect factor of these overhead conductors performance is AC resistance. However, the AC resistance also affected by many complex factors like skin-effect, magnetic hysteresis and eddy current. The correctly calculated AC resistance of overhead conductors is the key to the energy-saving. In this paper, three kinds of the overhead conductors (Aluminum Conductors Steel Reinforced, Aluminum Conductors Aluminum-Clad Steel Reinforced and Aluminum Conductors Carbon fiber composite core) AC resistance model are built by numerical calculation. By using these model, the AC resistance is simulated calculate. Meanwhile, in order to verify the accuracy of simulation results, the AC resistance of overhead conductors are measured by test. The result show that the different between the simulated values and measured values are less. In addition, through the simulation and measurement results of AC resistance, the energy-saving performance of the three kinds of overhead conductors is also compared. When passing a large current, the AC resistance of Carbon fiber composite core wire is smaller than the other overhead conductors. The calculation can provide reference for the evaluation of AC loss in transmission lines.","PeriodicalId":6763,"journal":{"name":"2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)","volume":"2 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77817370","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 : 2020-09-06DOI: 10.1109/ICHVE49031.2020.9279820
Xu Yang, Yi Liu, Yi Jiang, Hao Wen, Jing Zhang, Jia Chen
In order to use SF6 decomposition characteristics to identify faults of DC gas-insulated switchgear (GIS) under partial discharge (PD), the author chooses 6 experimental voltages to represent different PD stages, and carries out SF6 decomposition experiments. The experimental results show that SF6 decomposition produces include five stable components of CF4, CO2, SO2F2, SOF2 and SO2, among which SOF2 is the most important decomposed product, and the concentration of sulfur-containing components is higher than that of carbon-containing components. Finally, a feature set consisting of 21 concentration ratios is constructed, and the maximum relevance minimum redundancy criterion is used for the feature selection. BP neural network and support vector machine are used for fault diagnosis, and the accuracy rate is higher than 88%. The research work lays the foundation for the on-line monitoring and insulation state evaluation of DC GIS based on SF6 decomposition characteristics in the future.
{"title":"Type Identification of GIS Partial Discharge Based on SF6 Decomposition Characteristics under Negative DC Voltage","authors":"Xu Yang, Yi Liu, Yi Jiang, Hao Wen, Jing Zhang, Jia Chen","doi":"10.1109/ICHVE49031.2020.9279820","DOIUrl":"https://doi.org/10.1109/ICHVE49031.2020.9279820","url":null,"abstract":"In order to use SF<inf>6</inf> decomposition characteristics to identify faults of DC gas-insulated switchgear (GIS) under partial discharge (PD), the author chooses 6 experimental voltages to represent different PD stages, and carries out SF<inf>6</inf> decomposition experiments. The experimental results show that SF<inf>6</inf> decomposition produces include five stable components of CF<inf>4</inf>, CO<inf>2</inf>, SO<inf>2</inf>F<inf>2</inf>, SOF<inf>2</inf> and SO<inf>2</inf>, among which SOF<inf>2</inf> is the most important decomposed product, and the concentration of sulfur-containing components is higher than that of carbon-containing components. Finally, a feature set consisting of 21 concentration ratios is constructed, and the maximum relevance minimum redundancy criterion is used for the feature selection. BP neural network and support vector machine are used for fault diagnosis, and the accuracy rate is higher than 88%. The research work lays the foundation for the on-line monitoring and insulation state evaluation of DC GIS based on SF<inf>6</inf> decomposition characteristics in the future.","PeriodicalId":6763,"journal":{"name":"2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75818942","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 : 2020-09-06DOI: 10.1109/ICHVE49031.2020.9279900
M. Jin, Jian Wang, Yongjie Li, Cheng Chen, Shengwen Shu
Defect detection is an effective precaution against the brittle fracture fault of operating composite insulators. Based on the principle of electromagnetic wave radiation to the surrounding caused by an inner discharge defect of composite insulators, it is proposed that the ultra-high frequency (UHF) components of electromagnetic wave spectrum are measured, to realize the detection and location of an inner discharge defect in composite insulators. This paper investigates the characteristic spectrums of inner discharge before core rod brittle fracture of composite insulators by experiments on different defects. In addition, this method is applied to substation and transmission line, which is validated to be effective. Research results provide an effective way for remotely detecting the defect of operating composite insulators.
{"title":"Defect Detection for Composite Insulators Based on Electromagnetic Wave Spectrum and Field Application","authors":"M. Jin, Jian Wang, Yongjie Li, Cheng Chen, Shengwen Shu","doi":"10.1109/ICHVE49031.2020.9279900","DOIUrl":"https://doi.org/10.1109/ICHVE49031.2020.9279900","url":null,"abstract":"Defect detection is an effective precaution against the brittle fracture fault of operating composite insulators. Based on the principle of electromagnetic wave radiation to the surrounding caused by an inner discharge defect of composite insulators, it is proposed that the ultra-high frequency (UHF) components of electromagnetic wave spectrum are measured, to realize the detection and location of an inner discharge defect in composite insulators. This paper investigates the characteristic spectrums of inner discharge before core rod brittle fracture of composite insulators by experiments on different defects. In addition, this method is applied to substation and transmission line, which is validated to be effective. Research results provide an effective way for remotely detecting the defect of operating composite insulators.","PeriodicalId":6763,"journal":{"name":"2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)","volume":"27 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81403663","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 : 2020-09-06DOI: 10.1109/ICHVE49031.2020.9279656
Chenmeng Zhang, Kailin Zhao, S. Xie, Can Hu, Yu Zhang, Nanxi Jiang
Power capacitors suffer multiple impulse voltage during their lifetime. With the multiple impulse voltage aging, the insulation - oil-film dielectric, may deteriorate and even fail in the early stage. The time-domain dielectric response of oil-film dielectric with multiple impulse voltage aging is studied in this paper. At first, an aging and testing platform for oil film medium under impulse voltage was built to test the time-domain dielectric response (polarization depolarization current, PDC) of oil-film dielectric with multiple impulse voltage aging. And then, according to tested PDC, extended Debye model and characteristic parameters were obtained by matrix pencil algorithm identification. The results show that with the increase of impulse voltage times, the time-domain dielectric response of oil-film dielectric changes accordingly, as well as the branch parameters and characteristic parameters of the extended Debye model. At last, the test results are discussed.
{"title":"Research on Time-domain Dielectric Response of Multiple Impulse Voltage Aging Oil-film Dielectric","authors":"Chenmeng Zhang, Kailin Zhao, S. Xie, Can Hu, Yu Zhang, Nanxi Jiang","doi":"10.1109/ICHVE49031.2020.9279656","DOIUrl":"https://doi.org/10.1109/ICHVE49031.2020.9279656","url":null,"abstract":"Power capacitors suffer multiple impulse voltage during their lifetime. With the multiple impulse voltage aging, the insulation - oil-film dielectric, may deteriorate and even fail in the early stage. The time-domain dielectric response of oil-film dielectric with multiple impulse voltage aging is studied in this paper. At first, an aging and testing platform for oil film medium under impulse voltage was built to test the time-domain dielectric response (polarization depolarization current, PDC) of oil-film dielectric with multiple impulse voltage aging. And then, according to tested PDC, extended Debye model and characteristic parameters were obtained by matrix pencil algorithm identification. The results show that with the increase of impulse voltage times, the time-domain dielectric response of oil-film dielectric changes accordingly, as well as the branch parameters and characteristic parameters of the extended Debye model. At last, the test results are discussed.","PeriodicalId":6763,"journal":{"name":"2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)","volume":"5 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81062460","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}
DC cable is the most important carrier of DC transmission, while the DC cable accessories is the weakest part of the whole cable system. When the load applied in the flexible DC cable system is different, each part of the joint insulating material temperature changes, which makes the conductivity changes. This paper has compared the calculation results of analytical method and finite element method by calculating DC cable. The results show the consistency of analytical method and finite element method. Through the research we fully grasp the law of the electric field distribution of joint insulation layer, provide the research foundation of flexible DC cable joint structure design and optimization, and also provide technical support for China's ±535kV and ±800kV UHVDC transmission project.
{"title":"Study on Temperature and Electric Field Distributions of DC Cable Accessories","authors":"Longxiao Chen, Zhien Zhu, Liming Yang, Xike Wu, Shujun Liu, Yu Liu","doi":"10.1109/ICHVE49031.2020.9279365","DOIUrl":"https://doi.org/10.1109/ICHVE49031.2020.9279365","url":null,"abstract":"DC cable is the most important carrier of DC transmission, while the DC cable accessories is the weakest part of the whole cable system. When the load applied in the flexible DC cable system is different, each part of the joint insulating material temperature changes, which makes the conductivity changes. This paper has compared the calculation results of analytical method and finite element method by calculating DC cable. The results show the consistency of analytical method and finite element method. Through the research we fully grasp the law of the electric field distribution of joint insulation layer, provide the research foundation of flexible DC cable joint structure design and optimization, and also provide technical support for China's ±535kV and ±800kV UHVDC transmission project.","PeriodicalId":6763,"journal":{"name":"2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83179714","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 : 2020-09-06DOI: 10.1109/ICHVE49031.2020.9280025
Jiawei Wu, R. Han, Manyu Wang, W. Ding
The conduction of the gas switch is accompanied by spark/arc discharge. The high temperature and current density of the plasma channel will cause erosion on the surface of the electrode material. In particular, in repetitive pulsed power systems, electrode erosion has a sizeable influence on the performance of the system. Recent research has proven the superior properties of W-Ni-Fe alloy over traditional W-Cu composites in spark gaps. Not only the resistance of arc erosion, but the operating characteristics were evidently improved when W-Ni-Fe alloy was applied. This paper focus on the erosion morphology evolution of W-Ni-Fe alloy electrodes in a spark gap. In the experiment, the electrodes were tested with 100 kA level pulsed discharges for 10,000 shots (~1.3 C of transferred charge per shot). Surface profiles of 4 pairs of 90WNiFe (90 wt.% of W), 93WNiFe (93 wt.% of W), 97WNiFe (97 wt.% of W), and 90WCu (90 wt.% of W) were measured. A group of parameters has been proposed to characterize the features of surface profiles. Evolution of surface morphology features was therefore analyzed based on those parameters.
{"title":"Surface Morphology Evolution of W-Ni-Fe Alloy Electrode Under Repetitive Pulsed Discharges","authors":"Jiawei Wu, R. Han, Manyu Wang, W. Ding","doi":"10.1109/ICHVE49031.2020.9280025","DOIUrl":"https://doi.org/10.1109/ICHVE49031.2020.9280025","url":null,"abstract":"The conduction of the gas switch is accompanied by spark/arc discharge. The high temperature and current density of the plasma channel will cause erosion on the surface of the electrode material. In particular, in repetitive pulsed power systems, electrode erosion has a sizeable influence on the performance of the system. Recent research has proven the superior properties of W-Ni-Fe alloy over traditional W-Cu composites in spark gaps. Not only the resistance of arc erosion, but the operating characteristics were evidently improved when W-Ni-Fe alloy was applied. This paper focus on the erosion morphology evolution of W-Ni-Fe alloy electrodes in a spark gap. In the experiment, the electrodes were tested with 100 kA level pulsed discharges for 10,000 shots (~1.3 C of transferred charge per shot). Surface profiles of 4 pairs of 90WNiFe (90 wt.% of W), 93WNiFe (93 wt.% of W), 97WNiFe (97 wt.% of W), and 90WCu (90 wt.% of W) were measured. A group of parameters has been proposed to characterize the features of surface profiles. Evolution of surface morphology features was therefore analyzed based on those parameters.","PeriodicalId":6763,"journal":{"name":"2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78781986","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 : 2020-09-06DOI: 10.1109/ICHVE49031.2020.9279939
Yonzshena Xu, B. Luo, Fuzeng Zhang, Xiangjun Zeng
The phase-change cooling technology shows its superiority on transient heat dissipation of electronic device, such as IC. It was furtherly investigated to apply this technology to some electric apparatus like generator and power rectifier. In order to fully utilize the capability of phase-change cooling technology in cooling applications of HV power electric apparatus, it is necessary to verify the partial discharge (PD) suppression capability of the phase-change cooling liquid dielectric and the insulation effect caused by the bubble under boiling conditions. In this paper, the partial discharge characteristics of fluorinert dielectric liquid under the nonuniform field are studied with a modified test chamber. The partial discharge signals with and without bubbles are measured and analyzed in detail. The effect of bubble on the partial discharge characteristics under boiling condition is explored. Furthermore, it is revealed that the effects of applied voltage on the bubble motion and PD parameters.
{"title":"Investigation on Discharge Pattern of Fluorinated Liquid under Boiling Condition","authors":"Yonzshena Xu, B. Luo, Fuzeng Zhang, Xiangjun Zeng","doi":"10.1109/ICHVE49031.2020.9279939","DOIUrl":"https://doi.org/10.1109/ICHVE49031.2020.9279939","url":null,"abstract":"The phase-change cooling technology shows its superiority on transient heat dissipation of electronic device, such as IC. It was furtherly investigated to apply this technology to some electric apparatus like generator and power rectifier. In order to fully utilize the capability of phase-change cooling technology in cooling applications of HV power electric apparatus, it is necessary to verify the partial discharge (PD) suppression capability of the phase-change cooling liquid dielectric and the insulation effect caused by the bubble under boiling conditions. In this paper, the partial discharge characteristics of fluorinert dielectric liquid under the nonuniform field are studied with a modified test chamber. The partial discharge signals with and without bubbles are measured and analyzed in detail. The effect of bubble on the partial discharge characteristics under boiling condition is explored. Furthermore, it is revealed that the effects of applied voltage on the bubble motion and PD parameters.","PeriodicalId":6763,"journal":{"name":"2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE)","volume":"30 1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82722129","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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