Results 41 to 50 of about 12,322 (303)

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

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

Influence Mechanism and Suppression Control of the MMC on Short-Circuit Current Under AC Faults

IEEE Access, 2020
Modular multilevel converter based high voltage direct current (MMC-HVDC) transmission systems may increase the short-circuit current and affect the AC fault clearing of circuit breakers.
Jian Yang, Shurui Mao, Xiaodong Li, Zheng Xu   +3 more
doaj   +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

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

Efficient Methodology for Detection and Classification of Short-Circuit Faults in Distribution Systems with Distributed Generation

, 2022
Fault detection and classification are crucial procedures for electric power distribution systems because they can minimize the occurrence of faults.
Lopes, Mara Lúcia M. [UNESP], Lotufo, Anna Diva P., Santos, Andréia da Silva [UNESP], Mara Lúcia M. Lopes, Lotufo, Anna Diva P. [UNESP], Minussi, Carlos R., Faria, Lucas Teles [UNESP], Lucas Teles Faria, Andréia da Silva Santos, Santos, Andréia da Silva, Minussi, Carlos R. [UNESP], Anna Diva P. Lotufo, Carlos R. Minussi, Lopes, Mara Lúcia M., Faria, Lucas Teles   +14 more
core   +1 more source

A Review of Short-Circuit Fault Analysis and Novel Fault Detection Methods

, 2021
This paper proposes a comprehensive review of short circuit fault analysis. It presents the different definitions and classifications of faults. It then discusses both symmetrical and unsymmetrical faults in detail and provides the equations used to solve for the fault current during each of these faults.
Moayad Osman, Ibrahim O. Habiballah
openaire   +2 more sources

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

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

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source