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monitoring and operation control of electric power conversion systems in direct-drive wind turbines underfaults

Shoudao HUANG, Xuan WU, Xiao LIU, Jian GAO, Yunze HE

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3,   Pages 281-302 doi: 10.1007/s11465-017-0442-1

Abstract: This paper provides an overview of the CM, FD, and operation control of EPCSs in DD-WTs under faults.; briefly reviewed CM and FD methods and operation control of these generators and power converters underfaults; and discussed the grid voltage faults related to EPCSs in DD-WTs.

Keywords： wind turbine     electric power conversion system     condition monitoring     fault diagnosis     operation control underfaults     fault tolerance    

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Condition monitoring of a wind turbine generator using a standalone wind turbine emulator

Himani,Ratna DAHIYA

Frontiers in Energy 2016, Volume 10, Issue 3,   Pages 286-297 doi: 10.1007/s11708-016-0419-5

Abstract: open source technology from graze required for the condition monitoring to diagnose rotor and stator faultsThe emulator reproduces dynamic characteristics both under step variations and arbitrary variation inelectric subassemblies direct drive WTs are most susceptible to damage in practice, generator winding faults

Keywords： (WTE)     wind turbine generator (WTG)     maximum power point tracking (MPPT)     tip speed ratio (TSR)     rotor faults     stator faults    

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A multi-sensor relation model for recognizing and localizing faults of machines based on network analysis

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-022-0736-9

Abstract: Second, the localization for multi-source faults is seldom investigated, although locating the anomalyvariable over multivariate sensing data for certain types of faults is desirable.

Keywords： fault recognition     fault localization     multi-sensor relations     network analysis     graph neural network    

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A new and best approach for early detection of rotor and stator faults in induction motors coupled to

Abderrahim ALLAL,Boukhemis CHETATE

Frontiers in Energy 2016, Volume 10, Issue 2,   Pages 176-191 doi: 10.1007/s11708-015-0386-2

Abstract: proposed which was endowed with a dominant sensitivity in the case in which there would be rotor or stator faults

Keywords： induction motor     incipient broken bar     extended Park’s vector approach     spectral analysis     inter-turn short-circuit     Hilbert transform    

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Identification of faults through wavelet transform vis-à-vis fast Fourier transform of noisy vibration

Deepak PALIWAL,Achintya CHOUDHURY,T. GOVANDHAN

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 2,   Pages 130-141 doi: 10.1007/s11465-014-0298-6

Abstract:

Fault diagnosis of rolling element bearings requires efficient signal processing techniques. For this purpose, the performances of envelope detection with fast Fourier transform (FFT) and continuous wavelet transform (CWT) of vibration signals produced from a bearing with defects on inner race and rolling element, have been examined at low signal to noise ratio. Both simulated and experimental signals from identical bearings have been considered for the purpose of analysis. The bearings have been modeled as spring-mass-dashpot systems and the simulated signals have been obtained considering transfer functions for the bearing systems subjected to impulsive loads due to the defects. Frequency B spline wavelets have been applied for CWT and a discussion on wavelet selection has been presented for better effectiveness. Results show that use of CWT with the proposed wavelets overcomes the short coming of FFT while processing a noisy vibration signals for defect detection of bearings.

Keywords： Fault detection     spline wavelet     continuous wavelet transform     fast Fourier transform    

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Thinking about Future Plant Medicine Engineering

Gao Jinji

Strategic Study of CAE 2003, Volume 5, Issue 12,   Pages 30-35

Abstract: Under the light of the systemics, by introducing the methodology of medical science into the field of, it is possible to build a new theory of PME (Plant Medicine Engineering) to prevent and eliminate faultsSome common issues, such as the forming of diseases and faults, how to diagnose those diseases and faults, the deep rule concerning the causes and mechanisms of faults and diseases, comparison between curing

Keywords： plant medicine engineering     diseases     faults     prevention and cure    

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Direction and influencing factors of hydraulic fracture

Zhao Guoshi,Xu Jian,Qiu Jinping

Strategic Study of CAE 2012, Volume 14, Issue 4,   Pages 100-104

Abstract: along the greatest principal stress direction, which also affected by geological structure, original faults

Keywords： direction of hydraulic fracture     geological structure     original faults     faulting plane    

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measures on displacement and stress field of surrounding rock in tunnels crossing active strike-slip faults

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0966-x

Abstract: concrete-to resist fault dislocation in the surrounding rock near tunnels crossing active strike-slip faultsresults provide a new supporting idea for the surrounding rock of tunnels crossing active strike-slip faults

Keywords： anti-fault effect     engineering measures     LRAF method     stress and displacement field     tunnel-crossing active faults    

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An approach for mechanical fault classification based on generalized discriminant analysis

LI Wei-hua, SHI Tie-lin, YANG Shu-zi

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 3,   Pages 292-298 doi: 10.1007/s11465-006-0022-2

Abstract: To deal with pattern classification of complicated mechanical faults, an approach to multi-faults classificationKPCA is good at detection of machine abnormality while GDA performs well in multi-faults classificationbased on the collection of historical faults symptoms.condition classification and gear fault classification, an excellent performance in complicated multi-faults

Keywords： generalized discriminant     non-separable     abnormality     classification     multi-faults classification    

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A Blasting Sources-Based Approach to Inspection of Faults in Dam

Zhou Hougui,Tan Kaiyan

Strategic Study of CAE 2007, Volume 9, Issue 4,   Pages 79-82

Abstract:

An approach to inspection of incipient faults in dam by non_d estructivesystem integrity and key items of the new blasting source-based technology for inspection of incipient faults

Keywords： blasting source     dam     inspection of incipient fault     elastic wave     dynamic monitoring     excitation signal    

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Mechanism and control of existing faults on long-span concrete continuous system bridges in China

Lin Fan,Wang Ping,Xiao Kaijun,Li Wei

Strategic Study of CAE 2010, Volume 12, Issue 4,   Pages 78-81

Abstract: In this paper, the forms of many typical faults like excessive deflection in the mid-span, box beam crackAnd the characteristics of these faults' happening time, trend of development and distribution form

Keywords： prestressed     concrete     continuous bridge     fault     control method    

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A Fault Location Approach for the Testable Realization of Logic Functions

Pan Zhongliang

Strategic Study of CAE 2002, Volume 4, Issue 1,   Pages 69-74

Abstract: the circuits is presented, which can identify all fault equivalence classes in the AND gates, and the faults

Keywords： logic functions     Reed-Muller expressions     design for testability     single stuck at fault     faults location    

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A rank-based multiple-choice secretary algorithm for minimising microgrid operating cost under uncertainties

Frontiers in Energy 2023, Volume 17, Issue 2,   Pages 198-210 doi: 10.1007/s11708-023-0874-8

Abstract: variables or accurate predictive approaches, a lightweight solution was used to make real-time decisions undermicrogrid to reduce the operating cost by determining the best electricity purchase timing for each task under

Keywords： energy management systems     demand response     scheduling under uncertainty     renewable energy sources     multiple-choice    

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Hazard potential of zones of weakness in gravity dams under impact loading conditions

Herbert LINSBAUER

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1,   Pages 90-97 doi: 10.1007/s11709-010-0008-3

Abstract: Dam constructions worldwide are designed and constructed in view of the strictest safety aspects for all static and dynamic load cases. As experience shows, however, formation of cracks in the “homogeneos concrete” as well as unsatisfactory compound behavior of lift joints are not to be excluded. These zones of weakness especially on the upstream side of the dam— exposed to high water pressure (static and dynamic)— represent an increased risk of safety. The main investigation, apart from the computation of the dynamic effects on the dam as a global structure, focuses on the stability analysis of a pressure-water filled crack configuration subjected to “dynamic loading” in the form of seismic action on the dam-reservoir-system and alternatively by “impact spot-loading” within sectors of the reservoir. A fracture mechanics based analysis shows an excessive potential of damage for the afflicted structure.

Keywords： dam-reservoir     earthquake     impact     cracking     fracture mechanics    

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Evaluating the material strength from fracture angle under uniaxial loading

Jitang FAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 288-293 doi: 10.1007/s11709-018-0480-8

Abstract: Shearing fracture angle is smaller than 45° under uniaxial compression and greater than 45° under uniaxialIn this work, a unified relation of material strength under uniaxial compression and tension is developed

Keywords： strength     fracture     mechanics    

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Title Author Date Type Operation

monitoring and operation control of electric power conversion systems in direct-drive wind turbines underfaults

Shoudao HUANG, Xuan WU, Xiao LIU, Jian GAO, Yunze HE

Journal Article

Condition monitoring of a wind turbine generator using a standalone wind turbine emulator

Himani,Ratna DAHIYA

Journal Article

A multi-sensor relation model for recognizing and localizing faults of machines based on network analysis

Journal Article

A new and best approach for early detection of rotor and stator faults in induction motors coupled to

Abderrahim ALLAL,Boukhemis CHETATE

Journal Article

Identification of faults through wavelet transform vis-à-vis fast Fourier transform of noisy vibration

Deepak PALIWAL,Achintya CHOUDHURY,T. GOVANDHAN

Journal Article

Thinking about Future Plant Medicine Engineering

Gao Jinji

Journal Article

Direction and influencing factors of hydraulic fracture

Zhao Guoshi,Xu Jian,Qiu Jinping

Journal Article

measures on displacement and stress field of surrounding rock in tunnels crossing active strike-slip faults

Journal Article

An approach for mechanical fault classification based on generalized discriminant analysis

LI Wei-hua, SHI Tie-lin, YANG Shu-zi

Journal Article

A Blasting Sources-Based Approach to Inspection of Faults in Dam

Zhou Hougui,Tan Kaiyan

Journal Article

Mechanism and control of existing faults on long-span concrete continuous system bridges in China

Lin Fan,Wang Ping,Xiao Kaijun,Li Wei

Journal Article

A Fault Location Approach for the Testable Realization of Logic Functions

Pan Zhongliang

Journal Article

A rank-based multiple-choice secretary algorithm for minimising microgrid operating cost under uncertainties

Journal Article

Hazard potential of zones of weakness in gravity dams under impact loading conditions

Herbert LINSBAUER

Journal Article

Evaluating the material strength from fracture angle under uniaxial loading

Jitang FAN

Journal Article