Results 41 to 50 of about 8,801 (231)

Overvoltage Simulation Analysis and Suppression of Breaking in a 35 kV Shunt Reactor

Energies
When a 35 kV distribution network has the problem of insufficient reactive power, the input of a shunt reactor is a common compensation method. Vacuum circuit breakers are widely used in 35 kV distribution networks because of their superior arc ...
Jing Chen, Xiaoyue Chen, Siying Feng, Xinmeng Liu, Qin Liu   +4 more
doaj   +1 more source

Integration and Conventional Systems at STAR

, 2002
At the beginning of the design and construction of the STAR Detector, the collaboration assigned a team of physicists and engineers the responsibility of coordinating the construction of the detector.
Ackerman, Adler, B. Minor, H.S. Matis, Haldeman, P. Salz, R. Jared, R.L. Brown, W. Christie, W.R. Edwards   +9 more
core   +4 more sources

Model‐Aided State Parameter Inversion Identification of Electromagnetic Trip Device for High Voltage Circuit Breakers

High Voltage, EarlyView.
ABSTRACT In this paper, a model‐aided state parameter inversion identification method based on the coil current (CC) of electromagnetic trip device (ETD) is proposed to realise the state parameter inversion online and the quantitative description of defects.
Feiyue Yan, Jiangjun Ruan, Yufei Liu, Yongqing Deng   +3 more
wiley   +1 more source

Quantitative Evaluation of Mechanical Defects for Circuit Breakers Based on Self‐Adaptive Fault Feature Tracking

High Voltage, EarlyView.
ABSTRACT Many researchers are committed to improving the diagnosis accuracy and solving the few‐shot problem on circuit breakers (CBs). However, the research on the vibration transmission mechanism of the fault is insufficient, which makes it difficult to find the potential design defects of CBs through vibration.
Jiayi Gong, Yaxiong Tan, Shangding Li, Jian Li   +3 more
wiley   +1 more source

Switching transients caused by vacuum circuit breakers in collection grids of offshore wind farms

Wind Energy, 2021
In this study, transients that can occur in the collection grids of offshore wind farms were investigated. On the basis of the multiple prestrike and reignition model that can reflect the actual operation of a vacuum circuit breaker (VCB), a switching ...
Jiayuan Tao, Qing Yang, Xuena Zheng, Yanxiao He, Ruixue Wang, Hefei Lv, Jie Zhang   +6 more
doaj   +1 more source

Order Reduction of the Radiative Heat Transfer Model for the Simulation of Plasma Arcs

, 2015
An approach to derive low-complexity models describing thermal radiation for the sake of simulating the behavior of electric arcs in switchgear systems is presented.
Fagiano, Lorenzo, Gati, Rudolf
core   +1 more source

Investigation of the Simplified Equivalent Circuit Model of the Post‐Arc Sheath Stage in DC Vacuum Circuit Breakers

High Voltage, EarlyView.
ABSTRACT This paper presents a simplified equivalent circuit model (ECM) for the post‐arc sheath stage in DC vacuum circuit breakers and outlines the method for calculating circuit parameters using the particle‐in‐cell Monte Carlo collision (PIC‐MCC) method. The post‐arc sheath is modelled as a parallel combination of a variable resistor and a variable
Xubin Li, Xingyu Guo, Wen Wang, Xiaoming Liu, Minfu Liao, Jiyan Zou   +5 more
wiley   +1 more source

Comprehensive review of permanent magnet actuator for high and medium voltage circuit breakers application: Design, optimization and control

Results in Engineering
Permanent magnet actuators are widely used in fields requiring precise and reliable motion control, such as valves, pumps, and switches. They have also been extensively applied in vacuum circuit breakers, particularly in high- and medium-voltage ...
Guanbao Zeng, Lijian Wu, Tao Wang, Dianhe Zhao   +3 more
doaj   +1 more source

Effect of Magnetic Field on Different Opening Processes of Multi-Break Vacuum Gaps

IEEE Access, 2021
Vacuum gap saturation of single break can be solved by multiple breaks in series. In different breaking processes, the unbalanced energy and charges injected into the breaks lead to unbalanced voltage distribution.
Hao Zhang, Minfu Liao, Yifan Fu, Zhanqing Chen, Xinming Ma, Minjun Zhang   +5 more
doaj   +1 more source

The measurement of very low conductivity and dielectric loss in XLPE cables: A possible method to detect degradation due to thermal aging [PDF]

, 2011
The dielectric response of crosslinked polyethylene (XLPE) insulated, miniature power cables, extruded with inner and outer semicons, was measured over the frequency range 10-4 to 104 Hz at temperatures from 20 to 100 °C.
Dissado, L. A., Dodd, S. J., Fothergill, J., Liu, T., Nilsson, U. H.   +4 more
core   +1 more source