Results 11 to 20 of about 1,176 (264)

Real-Time Monitoring of High Voltage Switch Based on CAD

Advances in Multimedia, 2022
In the process of online real-time monitoring of intelligent digital filter high-voltage switchgear, the mechanical state diagnosis of high-voltage circuit breaker is based on fully understanding the mechanical characteristics of each component of ...
Long Di, Yong Xiao, Feng Hu, Yujian Liang, Jianmin Tan, Yimin You   +5 more
doaj   +1 more source

Performance Evaluation and Limitations of Overvoltage Suppression Circuits for Low- and Medium-Voltage DC Solid-State Breakers

IEEE Open Journal of Power Electronics, 2021
This paper presents a design and performance evaluation of three different overvoltage suppression circuits employed in a solid-state circuit breaker for medium- to high-power and low- to medium-voltage DC grids.
Andreas Giannakis, Dimosthenis Peftitsis
doaj   +1 more source

New two chamber transfer switch for 6500 A commutation current

Global Energy Interconnection, 2018
HVDC transfer switches are used in different locations in electrode lines of HVDC transmission systems for their reconfigurations. They have to carry and commutate currents to the overload currents of HVDC transmission systems, which increased to 6,400A ...
Lutz-Rüdiger Jänicke, Jörg Teichmann, Shibani Bose, Weidong Han, Xiaoming Wang   +4 more
doaj   +1 more source

Research on circuit breaker failure protection and the secondary accelerated fault isolation scheme of VSC-HVDC grids

Frontiers in Energy Research, 2023
When the direct current circuit breaker (DCCB) fails to operate, the fault range will further expand, endangering the safe operation of the power gird.
Andi Li, Botong Li, Weijie Wen, Bin Li, Xiaolong Chen   +4 more
doaj   +1 more source

Influence of single-phase circuit breaker tripping on inverter commutation

电力工程技术, 2022
If commutation failure does not occur when single-phase high resistance grounded in single-circuit AC line of inverter,then single-phase circuit breaker tripping may lead to commutation failure.
SONG Xinfu, MA Xing, LI Fengting, YIN Chunya, XIE Chao   +4 more
doaj   +1 more source

Research on transient insulation numerical analysis method of circuit breaker in GIS under lightning impulse voltage

The Journal of Engineering, 2019
In order to reveal the process of insulation destruction of circuit breaker in GIS under lightning impulse voltage, a new method of transient insulation numerical analysis is described in this paper.
Wu Qi, Liu Xiaoming, Yang Tian, Li Longnv   +3 more
doaj   +1 more source

Fault Interruption Scheme for HVDC System Using SiC-MESFET and VCB Based Hybrid Circuit Breaker

IEEE Access, 2021
As high voltage DC power system is gaining popularity, power electronic switching devices are becoming increasingly advanced to overcome problems of timely fault isolation.
Waheed A. Khan, Ali Raza, M. Rehan Usman, Shahzaib Hamid, Saif-Ur- Rehman, M. Arslan Usman, Christos Politis   +6 more
doaj   +1 more source

Online monitoring and diagnosis of high voltage circuit breaker faults: feature extraction analysis of vibration signals

International Journal of Metrology and Quality Engineering, 2019
The development of power grid system not only increases voltage and capacity, but also increases power risk. This paper briefly introduces the feature extraction method of the vibration signal of high voltage circuit breaker and support vector machine ...
Li Long, Xiao Jianfeng, Wu Bin, Zhou Mengge, Wang Qian   +4 more
doaj   +1 more source

Research status and expectation of on-line monitoring technologies of mechanical characteristics of high-voltage vacuum circuit breaker

Gong-kuang zidonghua, 2016
Basic contents of on-line monitoring technologies of mechanical characteristics of high-voltage vacuum circuit breaker were introduced, and various kinds of methods of on-line monitoring were reviewed.
ZHAO Yang
doaj   +1 more source

Mechanism Analysis and Simulation Study of Closing Overvoltage Fault in EMU Circuit Breaker

Chengshi guidao jiaotong yanjiu
Objective The overvoltage caused by circuit breaker closing will aggravate the insulation aging of high voltage equipment when EMU (electric multiple units)passes neutral section.
ZHANG Mingrui, ZHANG Ningchuan, LIU Zhengwei   +2 more
doaj   +1 more source