Results 31 to 40 of about 181,213 (309)

Impact of Inter-Turn Short Circuit in Excitation Windings on Magnetic Field and Stator Current of Synchronous Condenser under Unbalanced Voltage

Energies, 2023
Inter-turn short circuit in the excitation windings of synchronous condensers is a common fault that directly impacts their normal operation. However, current fault analysis and diagnosis of synchronous condensers primarily rely on voltage-balanced ...
Junqing Li, Chengzhi Zhang, Yuling He, Xiaodong Hu, Jiya Geng, Yapeng Ma   +5 more
doaj   +1 more source

Transient simulation and analysis for saturated core high temperature superconducting fault current limiter [PDF]

, 2007
In this paper, the transient performance of a magnetic core fault current limiter (FCL) saturated by high temperature superconducting (HTS) dc bias winding is investigated by using both 3-D field-circuit coupled simulation and magnetic circuit analysis ...
Cao, Z, Gong, W, Guo, Y, Qiu, J, Wang, S, Zhao, C, Zhu, JG   +6 more
core   +1 more source

Fault detection method for VSC-HVDC System with new energy sources considering fault current limiter

Energy Reports, 2023
Voltage source converter based high voltage direct current transmission (VSC-HVDC) is widely adopted in the power system with new energy sources, but with the problem of fast rise of fault current.
Jiaxin Yuan, Yuankun Zheng, Yudong Sun, Congtao Ye, Weizhe Zhang, Liwen Peng, Xianfeng Zheng, Jiawei Liu   +7 more
doaj   +1 more source

Testing switching networks for short-circuit faults

Electronics Letters, 1972
A significant class of faults in switching networks is due to short circuits between signal terminals. A method is proposed which tests networks for such faults, making use of algorithms developed for detecting or diagnosing stuck-at-level faults.
J.F. Kaposi, A.A. Kaposi
openaire   +1 more source

Interturn short circuit fault diagnosis method of direct-drive permanent magnet synchronous motor based on two-stage PNN

河南理工大学学报. 自然科学版
ObjectivesAccurate positioning of early faults is crucial for preventing the deterioration of motor system faults and formulating operation and maintenance strategies after faults.MethodsAiming at the problem that the inter-turn short-circuit fault ...
GAO Caixia, FENG Lingyun, DANG Jianjun
doaj   +1 more source

Short-Circuit Fault Current Calculation Method for the Multi-Terminal DC Grid Considering the DC Circuit Breaker

Energies, 2020
The analysis and calculation of the short-circuit fault current in the DC grid is of great significance to the design and configuration of the converter station and DC circuit breaker parameters.
Haipeng Jia, Jingyuan Yin, Tongzhen Wei, Qunhai Huo, Jinke Li, Lixin Wu   +5 more
doaj   +1 more source

Fault Diagnosis for Lithium-Ion Battery Pack Based on Relative Entropy and State of Charge Estimation

Batteries
Timely and accurate fault diagnosis for a lithium-ion battery pack is critical to ensure its safety. However, the early fault of a battery pack is difficult to detect because of its unobvious fault effect and nonlinear time-varying characteristics.
Tian-E Fan, Fan Chen, Hao-Ran Lei, Xin Tang, Fei Feng   +4 more
doaj   +1 more source

A magnetic isolation IGBT driver architecture with short circuit protection

Dianzi Jishu Yingyong
A magnetic isolation IGBT drive architecture with short circuit protection is designed in this paper. The architecture adopts transformer isolation, integrates desaturation detection circuit, Miller clamp circuit and soft turn-off.
Liu Jiajun, Li Fei, Chen Rongxin, Deng Yuqing, Xiao Peilei   +4 more
doaj   +1 more source

Electromagnetic-force calculation and fault diagnosis of shell transformer under inter-turn short circuit [PDF]

AIP Advances
Aiming at the electromagnetic distribution law, winding mechanical response characteristics, and degree diagnosis of inter-turn short circuit fault locations of shell-type transformers under inter-turn short circuits, the research idea of “simulation ...
Duanjiao Li, Wenxing Sun, Pengjie Liang, Yuhui Chen, Dezhi Chen, Xianghui Chang   +5 more
doaj   +1 more source

Influence of capacitor-buffered hybrid DC circuit breaker on bipolar short circuit fault of three-terminal MMC-HVDC transmission system

Energy Reports, 2020
The flexible DC transmission system needs a DC circuit breaker to remove and isolate the bipolar short-circuit fault to prevent the excessive short-circuit current from damaging the DC transmission system.
Can Ding, Xiaojian Tian, Taiping Nie, Zhao Yuan   +3 more
doaj   +1 more source