• Complex
  • Title
  • Author
  • Keyword
  • Abstract
  • Scholars
Search
High Impact Results & Cited Count Trend for Year Keyword Cloud and Partner Relationship

Query:

学者姓名:李兴文

Refining:

Source

Submit Unfold

Co-Author

Submit Unfold

Language

Submit

Clean All

Export Sort by:
Default
  • Default
  • Title
  • Year
  • WOS Cited Count
  • Impact factor
  • Ascending
  • Descending
< Page ,Total 11 >
Current Commutation Characteristics and Its Influential Factors for High-voltage Direct Current Transfer Switches EI
期刊论文 | 2018 , 44 (9) , 2856-2864 | Gaodianya Jishu/High Voltage Engineering
Abstract&Keyword Cite

Abstract :

High-voltage direct current (HVDC) transfer switches are key equipment in HVDC transmission system. We investigated the current commutation characteristics and its influential factors, and established a field-circuit coupled arc model of a 500 kV self-excited oscillatory HVDC transfer switch by deducing and discrediting the fundamental circuit equations satisfied by transfer switches. Firstly, the current commutation characteristics of the transfer switch under interrupting current of DC 4kA were studied. The calculated arc current and voltage were compared with the experimental results. Oscillation frequency of arc current in the experiment and simulation were 3 450 Hz and 3 759 Hz, respectively. Secondly, the influence of reactor and capacitor of the commutation path on the current oscillation process was investigated (L and C are 0.8 and 1.2 times of their typical values). Relationship between the radius, temperature and pressure of the arc and the current commutation characteristics was discussed. Finally, considering that air is a low-cost and environmentally friendly gas, arc characteristics of transfer switches in SF6 and air were analyzed and compared. It is found that the simulation results are partially verified by the experimental results. Increasing values of reactor or capacitor can enhance the arc oscillation, accelerate the current commutation, and then narrow down the arcing time. As the resonance frequency is the same, the reactor has a much greater influence on the oscillation process than capacitor. Compared with SF6, arcing time in air is shorter (reduced by about 4.5 ms), and peak voltage over capacitor in air is lower (decreased from 4 086.6 V to 2 760.5 V), which makes air applicable to transfer switches. In addition, it is expected that the simulation method could be applied to parameters optimization of transfer switches. © 2018, High Voltage Engineering Editorial Department of CEPRI. All right reserved.

Keyword :

Field-circuit coupled High voltage direct current HVDC transmission system Parameters optimization Resonance frequencies Self excited oscillation Temperature and pressures Transfer switches

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Li, Xingwen , Guo, Ze , Fu, Mingli et al. Current Commutation Characteristics and Its Influential Factors for High-voltage Direct Current Transfer Switches [J]. | Gaodianya Jishu/High Voltage Engineering , 2018 , 44 (9) : 2856-2864 .
MLA Li, Xingwen et al. "Current Commutation Characteristics and Its Influential Factors for High-voltage Direct Current Transfer Switches" . | Gaodianya Jishu/High Voltage Engineering 44 . 9 (2018) : 2856-2864 .
APA Li, Xingwen , Guo, Ze , Fu, Mingli , Zhuo, Ran , Wang, Dibo , Luo, Yan . Current Commutation Characteristics and Its Influential Factors for High-voltage Direct Current Transfer Switches . | Gaodianya Jishu/High Voltage Engineering , 2018 , 44 (9) , 2856-2864 .
Export to NoteExpress RIS BibTex
Experimental Study on Contact Behavior of Tilted Contact in Air Circuit Breaker EI SCIE Scopus
期刊论文 | 2018 , 8 (3) , 343-349 | IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY
Abstract&Keyword Cite

Abstract :

Short-time withstanding current is a key parameter of air circuit breakers. Due to the structure of multiple parallel contacts, the outer movable conductors tilt and slide seriously when withstanding the large short-circuit current. This paper is aimed to investigate the contact behavior of the tilted contact. A new designed experimental setup to measure the minimum repulsion current and the contact resistance of the tilted contact is developed. Contact force and tilt angle can also be measured and adjusted. Based on the measured results and the impression marks of the tilted contact, it is concluded that the repulsion force and the contact resistance are increased seriously when the contact is tilted. During the contact tilting process, the contact type is changed from the line contact to the point contact and the contact center is offset to the edge of the movable contact. In addition, with the help of contact bridge model, it is also found that the contact type transition plays a dominant role on the increase of the repulsion force and contact resistance.

Keyword :

contact resistance minimum repulsion current short-time withstand current electric contact contact behavior Air circuit breaker (ACB) contact tilt

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Li, Xingwen , Wang, Yunfeng , Wang, Qian et al. Experimental Study on Contact Behavior of Tilted Contact in Air Circuit Breaker [J]. | IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY , 2018 , 8 (3) : 343-349 .
MLA Li, Xingwen et al. "Experimental Study on Contact Behavior of Tilted Contact in Air Circuit Breaker" . | IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY 8 . 3 (2018) : 343-349 .
APA Li, Xingwen , Wang, Yunfeng , Wang, Qian , Qu, Jianyu , Liu, Hongwu . Experimental Study on Contact Behavior of Tilted Contact in Air Circuit Breaker . | IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY , 2018 , 8 (3) , 343-349 .
Export to NoteExpress RIS BibTex
Simulation Analysis of Arc Evolution Process in Multiple Parallel Contact Systems EI CPCI-S SCIE Scopus
会议论文 | 2018 , 46 (8) , 2788-2793 | 18th China National Conference on Plasma Science and Technology (CNCPST)
Abstract&Keyword Cite

Abstract :

Air circuit breaker (ACB) is widely used in power distribution system. The movable contact of ACB consists of multiple parallel contacts and the arc will be ignited between arcing contact and static contact when the short-circuit current appears. This paper focuses on the arc evolution process at various currents in multiple parallel contact systems. A 3-D magnetohydrodynamic model of a multiple parallel contact structures is developed. In this model, the anode consists to five parallel contacts, and they are separated by insulation material. The near-electrode layer with a nonlinear voltage-current density characteristic is modeled to describe the near-electrode voltage drop, and the difference between near-anode and near-cathode layers is considered. The magnetic vector potential approach is adopted to calculate the time-varying electromagnetic field produced by the current loop. The arc evolution processes at various currents are analyzed by current density and arc voltage. It is noted that the anode arc root appears on multiple contacts with the increase of current. The arc evolution process mainly depends on the arc resistance characteristic.

Keyword :

near-electrodes voltage drop evolution process Air circuit breaker (ACB) multiple parallel contacts magnetohydrodynamic (MHD)

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Yin, Jianning , Wang, Qian , Li, Xingwen . Simulation Analysis of Arc Evolution Process in Multiple Parallel Contact Systems [C] . 2018 : 2788-2793 .
MLA Yin, Jianning et al. "Simulation Analysis of Arc Evolution Process in Multiple Parallel Contact Systems" . (2018) : 2788-2793 .
APA Yin, Jianning , Wang, Qian , Li, Xingwen . Simulation Analysis of Arc Evolution Process in Multiple Parallel Contact Systems . (2018) : 2788-2793 .
Export to NoteExpress RIS BibTex
Experimental Study and Feature Improvement of DC Series Arc Faults with Switching Noise Interference CPCI-S
会议论文 | 2018 , 135-142 | Joint Meeting of the 29th International Conference on Electrical Contacts (ICEC) / 64th IEEE Holm Conference on Electrical Contacts
Abstract&Keyword Cite

Abstract :

DC microgrids have the higher efficiency, higher flexibility, and lower cost than ac networks due to the fewer conversion stages. However, the protection of dc microgrids is still challenging because the limited ac protection technologies could be directly migrated to the dc system. For the sake of the human and equipment safety, the arc fault protection technology is one of urgently concerned aspects. In dc microgrids, arc electrical characterizations would be inevitably interfered by switching noises and higher system electric levels, making the arc fault detection more challenging. In this paper, dc series arc faults under the background of different switching noise interferences are conducted through the designed experimental platform firstly. Having analyzing arc faults with the single and multiple switching noise interference sources based on the signal separation method, the influence of switching noises on arc electrical characterizations is discussed. For arc faults with these inference factors, the existing arc fault features used in the resistive system indicate some limitations, leading to new arc fault detection difficulties. Finally, corresponding measures are taken to give the larger arc fault time discovery pulse and better separated arc fault states. The enlarged arc fault differences are of great benefit to improve the detection effectiveness in these complicated scenes.

Keyword :

DC series arc faults interaction analysis higher electric lowly switching noises feature improvement

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Chen, Silei , Li, Xingwen . Experimental Study and Feature Improvement of DC Series Arc Faults with Switching Noise Interference [C] . 2018 : 135-142 .
MLA Chen, Silei et al. "Experimental Study and Feature Improvement of DC Series Arc Faults with Switching Noise Interference" . (2018) : 135-142 .
APA Chen, Silei , Li, Xingwen . Experimental Study and Feature Improvement of DC Series Arc Faults with Switching Noise Interference . (2018) : 135-142 .
Export to NoteExpress RIS BibTex
Dielectric Properties of Fluoronitriles/CO2 and SF6/N-2 Mixtures as a Possible SF6-Substitute Gas EI SCIE Scopus
期刊论文 | 2018 , 25 (4) , 1332-1339 | IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
Abstract&Keyword Cite

Abstract :

Perfluoronitriles (PFN) and their mixtures have garnered much attention as a great potential SF6-substitute gas, owing to their excellent dielectric strengths and minimal impacts on the environment. The dielectric properties of C4-PFN/CO2 and SF6/N-2 mixtures are investigated and compared by experiments and calculations, with taking into account the limitations of saturated vapor pressure on the mixed ratio at certain ambient temperatures. The saturated vapor pressures of these two mixtures are determined by combining the Antoine Equation and the basic law of vapor liquid equilibrium. Then, the 50% breakdown voltages V-50% of the C4-PFN/CO2 and SF6/N-2 mixtures are determined by tests with up-and-down method, and the values of E/p are deduced. Finally, the dielectric properties of these two mixtures are analyzed by combining the saturated vapor pressure characteristics and the breakdown electric field strengths. The results show that a proper choice of the mixed ratio and gas pressure of the C4-PFN/CO2 mixture can provide a stronger DS than the SF6/N-2 mixture and pure SF6. This indicates a great potential of the C4-PFN/CO2 mixture as a SF6-substitute gas for high voltage apparatus.

Keyword :

dielectric breakdown C4-PFN SF6/N-2 fluoronitriles/CO2 SF6 substitute

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Zhao, Hu , Li, Xingwen , Tang, Nian et al. Dielectric Properties of Fluoronitriles/CO2 and SF6/N-2 Mixtures as a Possible SF6-Substitute Gas [J]. | IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION , 2018 , 25 (4) : 1332-1339 .
MLA Zhao, Hu et al. "Dielectric Properties of Fluoronitriles/CO2 and SF6/N-2 Mixtures as a Possible SF6-Substitute Gas" . | IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION 25 . 4 (2018) : 1332-1339 .
APA Zhao, Hu , Li, Xingwen , Tang, Nian , Jiang, Xu , Guo, Ze , Lin, Hui . Dielectric Properties of Fluoronitriles/CO2 and SF6/N-2 Mixtures as a Possible SF6-Substitute Gas . | IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION , 2018 , 25 (4) , 1332-1339 .
Export to NoteExpress RIS BibTex
Electrical Characteristics of Microsecond Electrical Explosion of Cu Wires in Air Under Various Parameters EI SCIE Scopus
期刊论文 | 2018 , 46 (4) , 972-981 | IEEE TRANSACTIONS ON PLASMA SCIENCE
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
Abstract&Keyword Cite

Abstract :

Electrical explosion of wires has caused the attention of researchers because of its rich physical phenomena and plenty applications. Microsecond electrical explosion of Cu wires in air under various parameters is conducted, and diverse discharge waveforms are displayed and analyzed. By statistically summarizing the experimental results, experimental parameter selection suggestions for specific applications are given. In addition, the experimental results show that the average axial breakdown field strength is greatly changed with the breakdown time. It drops linearly from similar to 13 to similar to 3 kV/cm when breakdown time varies from 2 to 6 mu s, it keeps at a relatively low value about 1 kV/cm when the breakdown occurred after 8 mu s. The effect of current density on the rising edge of the resistivity curve is confirmed by the experimental results. Based on the correlation between the breakdown time and breakdown field strength and the correlation between the maximum current density and specific action when resistivity reaches 200 mu Omega center dot cm, the specific-action model is improved empirically. The proposed "two-stage" model better reflects the actual physical process and has higher accuracy and a wider scope of application.

Keyword :

Electrical characteristic specific-action model electrical explosion of wires (EEW)

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Yin, Guofeng , Li, Xingwen , Jia, Shenli . Electrical Characteristics of Microsecond Electrical Explosion of Cu Wires in Air Under Various Parameters [J]. | IEEE TRANSACTIONS ON PLASMA SCIENCE , 2018 , 46 (4) : 972-981 .
MLA Yin, Guofeng et al. "Electrical Characteristics of Microsecond Electrical Explosion of Cu Wires in Air Under Various Parameters" . | IEEE TRANSACTIONS ON PLASMA SCIENCE 46 . 4 (2018) : 972-981 .
APA Yin, Guofeng , Li, Xingwen , Jia, Shenli . Electrical Characteristics of Microsecond Electrical Explosion of Cu Wires in Air Under Various Parameters . | IEEE TRANSACTIONS ON PLASMA SCIENCE , 2018 , 46 (4) , 972-981 .
Export to NoteExpress RIS BibTex
SF6-alternative gases for application in gas-insulated switchgear EI SCIE Scopus
期刊论文 | 2018 , 51 (15) | JOURNAL OF PHYSICS D-APPLIED PHYSICS
WoS CC Cited Count: 7 SCOPUS Cited Count: 14
Abstract&Keyword Cite

Abstract :

The environmental problems caused by greenhouse gases have received unprecedented attention. Sulfur hexafluoride (SF6), which is the preferred gas for use in gas-insulated switchgear (circuit breakers, disconnect switches, etc. for high-voltage electrical circuits), has a very high global warming potential, and there is a large international effort to find alternative gases. Recently, this effort has made important progress, with promising alternative gases being identified and tested. An overview, in particular the current state of the art, of the study of SF6-alternative gases is presented in the paper. The review focuses on the application of the SF6-alternative gases in gas-insulated switchgear, with detailed analysis of calculations and measurements of their basic physical properties, dielectric strengths, and arc-quenching capabilities. Finally, a discussion of and perspectives on current research and future research directions are presented.

Keyword :

SF6 circuit breakers thermal plasmas gas-insulated switchgear

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Li, Xingwen , Zhao, Hu , Murphy, Anthony B. . SF6-alternative gases for application in gas-insulated switchgear [J]. | JOURNAL OF PHYSICS D-APPLIED PHYSICS , 2018 , 51 (15) .
MLA Li, Xingwen et al. "SF6-alternative gases for application in gas-insulated switchgear" . | JOURNAL OF PHYSICS D-APPLIED PHYSICS 51 . 15 (2018) .
APA Li, Xingwen , Zhao, Hu , Murphy, Anthony B. . SF6-alternative gases for application in gas-insulated switchgear . | JOURNAL OF PHYSICS D-APPLIED PHYSICS , 2018 , 51 (15) .
Export to NoteExpress RIS BibTex
Simulation of Electrode Erosion under DC Air Arc CPCI-S
会议论文 | 2018 , 495-500 | Joint Meeting of the 29th International Conference on Electrical Contacts (ICEC) / 64th IEEE Holm Conference on Electrical Contacts
Abstract&Keyword Cite

Abstract :

The erosion of electrode plays a crucial role in the reliability and life of low-voltage circuit breaker. Therefore, developing a valid erosion model for a range of current is important. In this paper, the arc-electrode unified model is established to determine mass loss under direct current air arc. This model includes two types of electrode material erosion: vaporization and sputter erosion. A two-dimensional magnetic hydrodynamics (MHD) model is built. In this model, the molten pool and arc are combined together. And the energy balance on the interface between electrode and arc is considered. The erosion model is established on the basis of the molten pool model. The vaporization flux caused by concentration gradient is calculated using the Langmuir formula when the surface temperature of molten pool is lower than its boiling point. The vaporization rate caused by pressure gradient is bigger than it caused by concentration gradient. The vaporization rate caused by pressure gradient is calculated by the fundamental principles of gas dynamics. The sputter rate is obtained based on statistical methods. The influence of electrode gap on the erosion is also carried out. The simulation results are compared with the experimental results in order to verify the accuracy and validity of the simulation model in the current simulation conditions.

Keyword :

Electrode gap Vaporization erosion DC air arc Molten pool Sputter erosion

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Deng, Yunkun , Ma, Yi , Wang, Dada et al. Simulation of Electrode Erosion under DC Air Arc [C] . 2018 : 495-500 .
MLA Deng, Yunkun et al. "Simulation of Electrode Erosion under DC Air Arc" . (2018) : 495-500 .
APA Deng, Yunkun , Ma, Yi , Wang, Dada , Wu, Yihong , Deng, Xiaofeng , Hou, Guobin et al. Simulation of Electrode Erosion under DC Air Arc . (2018) : 495-500 .
Export to NoteExpress RIS BibTex
Numerical Study of Arc Motion Process Considering Ferromagnetic Material in Multiple Parallel Contacts System CPCI-S
会议论文 | 2018 , 211-215 | Joint Meeting of the 29th International Conference on Electrical Contacts (ICEC) / 64th IEEE Holm Conference on Electrical Contacts
Abstract&Keyword Cite

Abstract :

Air circuit breaker (ACB) is widely used in power distribution system. The movable contact of ACB consist of multiple parallel contacts and the arc will be ignited when the short-circuit current appears. This paper focuses on the arc motion process in multiple parallel contacts system. A 3-D magneto-hydro-dynamic (MHD) model of multiple parallel contacts system is built. In this model, the nonlinear B-H curve of splitter plate is used in calculation. The magnetic vector potential approach is adopted to calculate the time-varying electromagnetic field produced by the current loop. The difference of voltage drop between near-anode and near-cathode is considered. In addition, the interaction among multiple parallel contacts is included in numerical simulation. Based on this calculation, the arc voltage, temperature and current density were obtained. The arc motion process is analyzed by current density and temperature. The simulation results show that the anode arc root will appears on multiple contacts with the increase of current. The upper arc moves faster than low arc after the arc column is divided by the splitter plate.

Keyword :

near-electrode voltage drop arc motion process current density magneto-hydro-dynamic (MHD) multiple parallel contacts system

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Zhang, Baoliang , Yin, Jianing , Zhang, Penghe et al. Numerical Study of Arc Motion Process Considering Ferromagnetic Material in Multiple Parallel Contacts System [C] . 2018 : 211-215 .
MLA Zhang, Baoliang et al. "Numerical Study of Arc Motion Process Considering Ferromagnetic Material in Multiple Parallel Contacts System" . (2018) : 211-215 .
APA Zhang, Baoliang , Yin, Jianing , Zhang, Penghe , Li, Xingwen , Wang, Qian , Hou, Guobin et al. Numerical Study of Arc Motion Process Considering Ferromagnetic Material in Multiple Parallel Contacts System . (2018) : 211-215 .
Export to NoteExpress RIS BibTex
An electrothermal plasma model considering polyethylene and copper ablation based on ignition experiment EI SCIE Scopus
期刊论文 | 2018 , 51 (23) | JOURNAL OF PHYSICS D-APPLIED PHYSICS
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
Abstract&Keyword Cite

Abstract :

In order to study the characteristics of electrothermal plasma interaction with energetic materials, especially the ignition ability, a novel model considering polyethylene and copper ablation is developed, and an ignition experiment system is set up. The parameters of the plasma and the surface conditions of the energetic materials are measured in the testing. The results show the measured first peak pressure to be similar to 2.2 MPa, the second peak pressure to be similar to 3.9 MPa, and the visible flame velocity to be similar to 2000 m s(-1). Circular pits of the order of microns and nanometers in size are observed on the surface of the energetic materials. Further, the parameters of the plasma, including static pressure, total pressure, density, temperature, velocity, copper concentration and PE concentration, are calculated and analyzed by the established model, under discharge currents of 9 kA. The simulation is similar to those of experimental results. A shock wave is observed in the experiment and is presented in the calculations; it plays an important role in the performance of the plasma in the nozzle region, where the parameters of the plasma variation trends are very complex. With the aim of obtaining the overall performance of the plasma, the coupling characteristics of multiple parameters must be taken into account, in accordance with the developed electrothermal plasma model.

Keyword :

copper ablation electrothermal plasma energetic materials ignition system shock wave

Cite:

Copy from the list or Export to your reference management。

GB/T 7714 Zhang, Jiangbo , Li, Xingwen , Hang, Yuhua et al. An electrothermal plasma model considering polyethylene and copper ablation based on ignition experiment [J]. | JOURNAL OF PHYSICS D-APPLIED PHYSICS , 2018 , 51 (23) .
MLA Zhang, Jiangbo et al. "An electrothermal plasma model considering polyethylene and copper ablation based on ignition experiment" . | JOURNAL OF PHYSICS D-APPLIED PHYSICS 51 . 23 (2018) .
APA Zhang, Jiangbo , Li, Xingwen , Hang, Yuhua , Yang, Weihong . An electrothermal plasma model considering polyethylene and copper ablation based on ignition experiment . | JOURNAL OF PHYSICS D-APPLIED PHYSICS , 2018 , 51 (23) .
Export to NoteExpress RIS BibTex
10| 20| 50 per page
< Page ,Total 11 >

Export

Results:

Selected

to

Format:
FAQ| About| Online/Total:3264/55063648
Address:XI'AN JIAOTONG UNIVERSITY LIBRARY(No.28, Xianning West Road, Xi'an, Shaanxi Post Code:710049) Contact Us:029-82667865
Copyright:XI'AN JIAOTONG UNIVERSITY LIBRARY Technical Support:Beijing Aegean Software Co., Ltd.