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< Page ,Total 27 >
Arcing Contact Gap of a 126-kV Horseshoe-Type Bipolar Axial Magnetic Field Vacuum Interrupters EI SCIE Scopus
期刊论文 | 2018 , 46 (10) , 3713-3721 | IEEE TRANSACTIONS ON PLASMA SCIENCE
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Abstract :

The objective of this paper is to determine arcing contact gap of a 126-kV horseshoe-type bipolar axial magnetic field vacuum interrupter. Drawn arc experiments were carried out in a demountable vacuum. Experimental current ranged from 12-to 40-kA rms. Based on the vacuum arc behavior, minimum arcing contact gap D-1 and maximum arcing contact gap D-2 were defined. When average opening speed within 20 mm (v(1)) was 1.9, 2.3, and 2.6 m/s, D-1 was determined as 15.3, 16.8, and 14.3 mm, respectively. In addition, D-1 reflected a peak effect with v1. When average opening speed within 40 mm (v(2)) was 2.6, 2.7, and 2.8 m/s, D-2 was determined as 38.5, 36.7, and 36.1 mm, respectively. Uncontrollable arc mode appeared when current was higher than 32 kA with arc duration of 9 ms. The critical contact gap to avoid uncontrollable arc mode decreased as a liner function of arc current. Based on the experimental results, quantitative design method of three-interval opening velocity for the 126-kV horseshoe-type vacuum circuit breaker was proposed. For short-circuit current interruption test duty T100s, lower limit value of v(1) and upper limit value of v(2) were determined as 2.5 and 2.9 m/s with a prospective minimum arcing time of 7 ms.

Keyword :

126-kV horseshoe-type vacuum interrupter (VI) maximum arcing contact gap minimum arcing contact gap opening velocity design method vacuum arcs

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GB/T 7714 Li, Haomin , Wang, Zihan , Geng, Yingsan et al. Arcing Contact Gap of a 126-kV Horseshoe-Type Bipolar Axial Magnetic Field Vacuum Interrupters [J]. | IEEE TRANSACTIONS ON PLASMA SCIENCE , 2018 , 46 (10) : 3713-3721 .
MLA Li, Haomin et al. "Arcing Contact Gap of a 126-kV Horseshoe-Type Bipolar Axial Magnetic Field Vacuum Interrupters" . | IEEE TRANSACTIONS ON PLASMA SCIENCE 46 . 10 (2018) : 3713-3721 .
APA Li, Haomin , Wang, Zihan , Geng, Yingsan , Liu, Zhiyuan , Wang, Jianhua . Arcing Contact Gap of a 126-kV Horseshoe-Type Bipolar Axial Magnetic Field Vacuum Interrupters . | IEEE TRANSACTIONS ON PLASMA SCIENCE , 2018 , 46 (10) , 3713-3721 .
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State of charge estimation for liquid metal battery using Kalman filter EI Scopus
会议论文 | 2018 , 2018-January , 67-72
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Abstract :

© 2017 IEEE. This paper proposed an effective battery model together with a state of charge(SOC) estimation model designed specifically for Liquid Metal Battery (LMB). LMB is a potential energy storage battery very suitable for power grid, with long life-span, large charge current and high energy density. The parameters of this LMB model was determined based on the second order Thevenin circuit. The value of these parameters was calculated according to the experimental data and global optimization algorithm. Data comparison between the battery terminal voltage obtained from the experiment and calculated by model is made to prove the accuracy of the LMB model. The SOC estimation model was built using Kalman Filter algorithm and the LMB model established in this paper. The SOC estimation model performed an accurate performance without the necessity of an initial value under different dynamic conditions or static condition. Data comparison between the SOC obtained from the experiment and calculated by model is made to prove the accuracy of the SOC estimation model. The root-mean-square error of these two sets of data is 0.0171.

Keyword :

battery model Kalman filter liquid metal battery SOC estimation

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GB/T 7714 Wang, Xian , Song, Zhengxiang , Li, Tao et al. State of charge estimation for liquid metal battery using Kalman filter [C] . 2018 : 67-72 .
MLA Wang, Xian et al. "State of charge estimation for liquid metal battery using Kalman filter" . (2018) : 67-72 .
APA Wang, Xian , Song, Zhengxiang , Li, Tao , Geng, Yingsan , Wang, Jianhua , Cao, Yupeng et al. State of charge estimation for liquid metal battery using Kalman filter . (2018) : 67-72 .
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Research on the Factors Influencing the Measurement Errors of the Discrete Rogowski Coil EI SCIE Scopus
期刊论文 | 2018 , 18 (3) | SENSORS
WoS CC Cited Count: 2 SCOPUS Cited Count: 1
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Abstract :

An innovative array of magnetic coils (the discrete Rogowski coil-RC) with the advantages of flexible structure, miniaturization and mass producibility is investigated. First, the mutual inductance between the discrete RC and circular and rectangular conductors are calculated using the magnetic vector potential (MVP) method. The results are found to be consistent with those calculated using the finite element method, but the MVP method is simpler and more practical. Then, the influence of conductor section parameters, inclination, and eccentricity on the accuracy of the discrete RC is calculated to provide a reference. Studying the influence of an external current on the discrete RC's interference error reveals optimal values for length, winding density, and position arrangement of the solenoids. It has also found that eccentricity and interference errors decreasing with increasing number of solenoids. Finally, a discrete RC prototype is devised and manufactured. The experimental results show consistent output characteristics, with the calculated sensitivity and mutual inductance of the discrete RC being very close to the experimental results. The influence of an external conductor on the measurement of the discrete RC is analyzed experimentally, and the results show that interference from an external current decreases with increasing distance between the external and measured conductors.

Keyword :

interference error mutual inductance magnetic vector potential discrete Rogowski coil eccentricity error

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GB/T 7714 Xu, Mengyuan , Yan, Jing , Geng, Yingsan et al. Research on the Factors Influencing the Measurement Errors of the Discrete Rogowski Coil [J]. | SENSORS , 2018 , 18 (3) .
MLA Xu, Mengyuan et al. "Research on the Factors Influencing the Measurement Errors of the Discrete Rogowski Coil" . | SENSORS 18 . 3 (2018) .
APA Xu, Mengyuan , Yan, Jing , Geng, Yingsan , Zhang, Kun , Sun, Chao . Research on the Factors Influencing the Measurement Errors of the Discrete Rogowski Coil . | SENSORS , 2018 , 18 (3) .
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Direct-Current Vacuum Circuit Breaker With Superconducting Fault-Current Limiter EI SCIE Scopus
期刊论文 | 2018 , 28 (1) | IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
WoS CC Cited Count: 4 SCOPUS Cited Count: 4
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Abstract :

The objective of this paper is to propose a dc current interruption technology for railway dc traction systems, consisting of a dc vacuum circuit breaker with a superconducting fault-current limiter (SFCL). To this end, a 1.5-kV dc circuit breaker prototype is designed, involving a dc vacuum circuit breaker and a resistive-type SFCL serially connected. The dc vacuum circuit breaker is developed with a commutation circuit to generate a reverse injection current, and the resistive-type SFCL is composed of yttrium barium copper oxide superconducting tape. An LC current source tested the 1.5-kV prototype, showing that, when the precharged capacitor voltage is 1.5 kV, the prospective current is 47 kA increasing at a rate of 9.4 A/mu s. The SFCL limits this current to similar to 3 kA (peak value), and then, decreases the current to 2 kA after 6 ms, followed by successful clearance via the dc vacuum circuit breaker. The proposed 1.5-kV circuit breaker will successfully clear short-circuit faults up to 47 kA by first limiting the prospective current and then interrupting it.

Keyword :

superconducting fault-current limiter (SFCL) DCcircuit breakers dc power systems vacuum circuit breakers

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GB/T 7714 Yang, Kun , Yang, Yi , Junaid, Muhammad et al. Direct-Current Vacuum Circuit Breaker With Superconducting Fault-Current Limiter [J]. | IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY , 2018 , 28 (1) .
MLA Yang, Kun et al. "Direct-Current Vacuum Circuit Breaker With Superconducting Fault-Current Limiter" . | IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 28 . 1 (2018) .
APA Yang, Kun , Yang, Yi , Junaid, Muhammad , Liu, Siyuan , Liu, Zhiyuan , Geng, Yingsan et al. Direct-Current Vacuum Circuit Breaker With Superconducting Fault-Current Limiter . | IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY , 2018 , 28 (1) .
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Online junction temperature extraction and aging detection of IGBT via Miller plateau width EI Scopus
会议论文 | 2018 , 2018-March , 2813-2820
SCOPUS Cited Count: 1
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Abstract :

© 2018 IEEE. The width of the Miller plateau during IGBT turnoff process is temperature sensitive and suitable for online junction temperature monitoring. In this paper, the online measurement system to detect this parameter is achieved at the gate driver side. The advantages of using the Miller plateau width for practical applications are discussed by comparison of three existing parameters. An accelerated aging test has been performed to determine the evolution of the Miller plateau width and validate the effectiveness of the method during the entire lifetime. Results show that as the bond-wire degradation develops and the junction temperature rises in the aging process, the Miller plateau width decreases, and it varies conversely with the on-state voltage. Therefore, the Miller plateau width is proposed as the indicator for online aging detection and remaining life prediction of IGBT.

Keyword :

Condition Monitoring Failure Indicator IGBT Junction Temperature Semiconductor Reliability

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GB/T 7714 Liu, Jingcun , Zhang, Guogang , Chen, Qian et al. Online junction temperature extraction and aging detection of IGBT via Miller plateau width [C] . 2018 : 2813-2820 .
MLA Liu, Jingcun et al. "Online junction temperature extraction and aging detection of IGBT via Miller plateau width" . (2018) : 2813-2820 .
APA Liu, Jingcun , Zhang, Guogang , Chen, Qian , Qi, Lu , Qin, Zheng , Wang, Jianhua et al. Online junction temperature extraction and aging detection of IGBT via Miller plateau width . (2018) : 2813-2820 .
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Prestrike Inrush Current Arc Behaviors in Vacuum Interrupters Subjected to a Transverse Magnetic Field and an Axial Magnetic Field EI SCIE Scopus
期刊论文 | 2018 , 46 (8) , 3075-3082 | IEEE TRANSACTIONS ON PLASMA SCIENCE
WoS CC Cited Count: 1 SCOPUS Cited Count: 1
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Abstract :

The objective of this paper is to determine the influences of the transverse magnetic field (TMF) and the axial magnetic field (AMF) on prestrike inrush current arc behaviors in vacuum interrupters (VIs) during capacitive making processes. Two types of cup-type VI contacts were used: TMF contacts and AMF contacts. The contact diameter of the VIs was 48 mm. The insulating envelopes of the VIs were transparent, and there was no metal vapor shield inside the VIs, which were arranged for the observation of the prestrike arcs. The inrush current arc behaviors were recorded by a high-speed charge-coupled device video camera. The experimental results revealed that the VIs of cup-type AMF contact showed a higher dielectric strength than those of cup-type TMF contact during the making operations of inrush current. In addition, the arcs in VIs of cup-type TMF contact tended to he intense arcs that caused serious welding than those of VIs of cup-type AMF contact. Moreover, the cup-type AMF contact effectively reduced the prestrike arc erosion on the contact surfaces than those of TMF contact during the prestrike process of inrush current.

Keyword :

prestrike arc transverse magnetic field (TMF) Axial magnetic field (AMF) inrush current vacuum interrupter (VI)

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GB/T 7714 Yu, Yongxiang , Li, Guoqin , Geng, Yingsan et al. Prestrike Inrush Current Arc Behaviors in Vacuum Interrupters Subjected to a Transverse Magnetic Field and an Axial Magnetic Field [J]. | IEEE TRANSACTIONS ON PLASMA SCIENCE , 2018 , 46 (8) : 3075-3082 .
MLA Yu, Yongxiang et al. "Prestrike Inrush Current Arc Behaviors in Vacuum Interrupters Subjected to a Transverse Magnetic Field and an Axial Magnetic Field" . | IEEE TRANSACTIONS ON PLASMA SCIENCE 46 . 8 (2018) : 3075-3082 .
APA Yu, Yongxiang , Li, Guoqin , Geng, Yingsan , Wang, Jianhua , Liu, Zhiyuan . Prestrike Inrush Current Arc Behaviors in Vacuum Interrupters Subjected to a Transverse Magnetic Field and an Axial Magnetic Field . | IEEE TRANSACTIONS ON PLASMA SCIENCE , 2018 , 46 (8) , 3075-3082 .
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DC Interrupting With Self-Excited Oscillation Based on the Superconducting Current-Limiting Technology EI SCIE Scopus
期刊论文 | 2018 , 33 (1) , 529-536 | IEEE TRANSACTIONS ON POWER DELIVERY
WoS CC Cited Count: 5 SCOPUS Cited Count: 5
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Abstract :

A dc circuit breaker (DCCB), which combines a superconducting current-limiting technology and a self-excited oscillation interrupting technology, was proposed. The proposed DCCB includes a superconducting current-limiting module and an interrupter module. The objective of this paper is to investigate the effects of a transverse magnetic field (TMF) on dc interruption based on the self-excited oscillation principle. The dc interruption characteristics of CO2 and SF6 were investigated by applying a TMF of 0 and 200 mT with a puffer-type structure as a benchmark. The experimental results show that applying a TMF of 200 mT can significantly reduce the arcing time compared with a TMF of 0 mT and puffer-type structure. The dc interruption capacity for the SF6 insulation is higher than that for the CO2 insulation in the interrupter module under the same experimental condition. The simulation results of rated voltage of 10 kV show that the superconducting current-limit module limited the short current of 20 kA to less than 1 kA, and the arcing time was 4.5 ms. The results of rated voltage of 200 kV, short current of 30 kA, show that the DCCB only needed to interrupt the limited current of 3.5 kA and the overvoltage was less than 200 kV.

Keyword :

DC circuit breakers DC interruption superconducting current-limiting self-excited oscillation

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GB/T 7714 Xiang, Bin , Liu, Zhiyuan , Wang, Chuanchuan et al. DC Interrupting With Self-Excited Oscillation Based on the Superconducting Current-Limiting Technology [J]. | IEEE TRANSACTIONS ON POWER DELIVERY , 2018 , 33 (1) : 529-536 .
MLA Xiang, Bin et al. "DC Interrupting With Self-Excited Oscillation Based on the Superconducting Current-Limiting Technology" . | IEEE TRANSACTIONS ON POWER DELIVERY 33 . 1 (2018) : 529-536 .
APA Xiang, Bin , Liu, Zhiyuan , Wang, Chuanchuan , Nan, Zhenle , Geng, Yingsan , Wang, Jianhua et al. DC Interrupting With Self-Excited Oscillation Based on the Superconducting Current-Limiting Technology . | IEEE TRANSACTIONS ON POWER DELIVERY , 2018 , 33 (1) , 529-536 .
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Influence of Grading Capacitors on Breakdown Characteristics of a Double-Break Vacuum Interrupter CPCI-S CSSCI-E
会议论文 | 2017 , 165-169 | 4th International Conference on Electric Power Equipment-Switching Technology (ICEPE-ST)
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Abstract :

The objective of this paper is to determinate the influence of grading capacitance on breakdown characteristics of a double-break vacuum interrupter. A prototype of double-break vacuum interrupter was built up as a U-type configuration with two 12 kV vacuum interrupters in series. The double-break vacuum interrupter is stressed by a power frequency withstand voltage and a lightning impulse withstand voltage, respectively. The lightning impulse breakdown voltage U-50 is obtained by an up-and-down method. Five grading capacitance are designed. One is with no grading capacitors, which is as a benchmark. The other four capacitances are 100 pF, 500 pF, 1500 pF, and 10 nF, respectively. The experimental results show that there is an optimum grading capacitance which leads to a maximum impulse breakdown voltage. As the grading capacitance increases, the number of successive breakdown increases when breakdown occurs. With grading capacitance increasing, the power frequency breakdown voltage increases and finally reaches saturation.

Keyword :

double-break vacuum interrupter breakdown characteristics withstand voltage grading capacitors

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GB/T 7714 Liu, Pei , Fan, Yiping , Ma, Kui et al. Influence of Grading Capacitors on Breakdown Characteristics of a Double-Break Vacuum Interrupter [C] . 2017 : 165-169 .
MLA Liu, Pei et al. "Influence of Grading Capacitors on Breakdown Characteristics of a Double-Break Vacuum Interrupter" . (2017) : 165-169 .
APA Liu, Pei , Fan, Yiping , Ma, Kui , Du, Wei , Yao, Xiaofei , Zhang, Bojian et al. Influence of Grading Capacitors on Breakdown Characteristics of a Double-Break Vacuum Interrupter . (2017) : 165-169 .
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Fractal features of contact surface ruptured from arc welding by high frequency inrush current in vacuum interrupters Scopus
会议论文 | 2017 , 2017-December , 129-132
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© 2017 IEEE. A prestrike high frequency inrush current arc will cause a local contact surface melting and welding in capacitive making process of vacuum interrupters (VIs). The contact surfaces may be damaged from a rupture of the contact welding during the next breaking operation, which has a negative effect on restrike. A fractal characteristic can be used to describe such irregular ruptures. The objective of this paper is to determine the contact morphological ruptures' fractal features in VIs suffering high frequency inrush current. A 3D laser microscopy was used to obtain the images of the contacts' rupture surfaces after suffering various amplitudes of inrush current, 5kA, 10kA, and 20kA. Two different contact materials of CuCr50/50 and CuW10/90 were investigated in the experiment. Then a box-counting method is used to evaluate the images' fractal dimensions. The experimental results show that the fractal dimensions of CuCr contact surfaces exist two distinct areas, while CuW contact surfaces do not exist. For CuCr contacts, the fractal dimensions of the ruptured contact areas range from 2.3762 to 2.4775 and fractal dimensions of contact areas that are not ruptured range from 2.5775 to 2.6655. For CuW contact, the fractal dimensions range from 2.5121to 2.7013.

Keyword :

capacitive switching contact rupture fractal inrush current vacuum interrupter

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GB/T 7714 Li, Guoqin , Yu, Yongxiang , Geng, Yingsan et al. Fractal features of contact surface ruptured from arc welding by high frequency inrush current in vacuum interrupters [C] . 2017 : 129-132 .
MLA Li, Guoqin et al. "Fractal features of contact surface ruptured from arc welding by high frequency inrush current in vacuum interrupters" . (2017) : 129-132 .
APA Li, Guoqin , Yu, Yongxiang , Geng, Yingsan , Liu, Zhiyuan , Wang, Jianhua . Fractal features of contact surface ruptured from arc welding by high frequency inrush current in vacuum interrupters . (2017) : 129-132 .
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Study on fast early detecting and rapid accurate fault parameters estimation method for short-circuit fault Scopus
会议论文 | 2017 , 2017-December , 509-513
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© 2017 IEEE. With the intelligentization of distribution network, a large scale of power electronic devices are applied in energy conversion. And the system flow of distribution network becomes random and varies greatly, which puts forward higher requirements for measurement and protection. Therefore, it's necessary to detect and identify short-circuit fault rapidly and effectively. In this paper, an early detecting method based on Wavelet Transform and a zero prediction method based on recursive least square (RLS) algorithm are proposed and implemented. The fault detection is based on the quadratic spline wavelet transform and the detail component of the wavelet transform is taken as fault eigenvalue. The parameters estimation is based recursive least square algorithm. The factors which affect the convergence speed of RSL and accuracy of zero-crossings prediction are studied. Conduct simulation and verification are carried out by using the short-circuit fault current data from PSCAD simulation, and results show that those methods can quickly determine fault inception in 1ms with error of zero-crossings less mall 1ms.

Keyword :

Morphological operation RLS Short-circuit Fault Wavelet Transform Zero-crossing prediction

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GB/T 7714 Chen, Qian , Zhang, Guogang , Liu, Jingcun et al. Study on fast early detecting and rapid accurate fault parameters estimation method for short-circuit fault [C] . 2017 : 509-513 .
MLA Chen, Qian et al. "Study on fast early detecting and rapid accurate fault parameters estimation method for short-circuit fault" . (2017) : 509-513 .
APA Chen, Qian , Zhang, Guogang , Liu, Jingcun , Geng, Yingsan , Wang, Jianhua . Study on fast early detecting and rapid accurate fault parameters estimation method for short-circuit fault . (2017) : 509-513 .
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