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Acoustic emission (AE) techniques have successfully been used for assuring the structural integrity of large rocket motorcases since 1963, and their uses have expanded to ever larger structures, especially as structural health monitoring (SHM) of large structures has become the most urgent task for engineering communities around the world. The needs for advanced AE monitoring methods are felt keenly by those dealing with aging infrastructures. Many publications have appeared covering various aspects of AE techniques, but documentation of actual applications of AE techniques has been mostly limited to reports of successful results without technical details that allow objective evaluation of the results. There are some exceptions in the literature. In this Special Issue of the Acoustics section of Applied Sciences, we seek contributions covering these exceptions cited here. Here, we seek contributions describing case histories of AE applications to large structures that have achieved the goals of SHM by providing adequate technical information supporting the success stories. Types of structures can include aerospace and geological structures, bridges, buildings, factories, maritime facilities, off-shore structures, etc. Experiences with AE monitoring methods designed and proven for large stru

acoustic emission --- thermal cracking --- asphalt pavements --- embrittlement temperatures --- recycled asphalt pavements --- recycled asphalt shingles --- cooling cycles --- closed-form solution --- outlier --- time difference of arrival --- weight estimation --- structural diagnosis --- attenuation --- source location --- sensing --- signal processing --- structural health monitoring --- time series analysis --- b-value --- natural time --- critical phenomena --- reliability --- structural integrity --- crack growth --- fatigue life prediction --- uncertainty analysis --- nondestructive testing --- non-destructive testing --- hydrotreater --- bridge --- high temperature --- gas adsorber --- rotary kiln --- dragline --- acoustic emission (AE) --- non-destructive methods (NDT) --- diagnostic methods --- bridges --- structural health monitoring (SHM) --- acoustic emission swarm --- 2011 Tohoku earthquake --- repeating earthquake --- multiplet --- crustal movement --- optimized EEMD --- 2D-MUSIC --- composite structure --- impact localization --- part qualification --- structural design --- composites --- nondestructive evaluation (NDE) --- in situ acoustic emission (AE) monitoring --- mines --- host rock --- remote monitoring --- corrosion --- nuclear facilities --- alkali-silica reaction --- pattern recognition --- confinement --- damage evaluation --- beam --- vibration --- high-rate dynamics --- n/a

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Wind Power Plant (WPP) and Wind Turbine (WT) modeling are becoming of key importance due to the relevant wind-generation impact on power systems. Wind integration into power systems must be carefully analyzed to forecast the effects on grid stability and reliability. Different agents, such as Transmission System Operators (TSOs) and Distribution System Operators (DSOs), focus on transient analyses. Wind turbine manufacturers, power system software developers, and technical consultants are also involved. WPP and WT dynamic models are often divided into two types: detailed and simplified. Detailed models are used for Electro-Magnetic Transient (EMT) simulations, providing both electrical and mechanical responses with high accuracy during short time intervals. Simplified models, also known as standard or generic models, are designed to give reliable responses, avoiding high computational resources. Simplified models are commonly used by TSOs and DSOs to carry out different transient stability studies, including loss of generation, switching of power lines or balanced faults, etc., Assessment and validation of such dynamic models is also a major issue due to the importance and difficulty of collecting real data. Solutions facing all these challenges, including the development, validation and application of WT and WPP models are presented in this Issue.

History of engineering & technology --- bearing current --- common mode current --- doubly fed induction generators --- permanent magnet synchronous generators --- wind turbine generator --- doubly-fed generator --- converter control --- short-circuit current --- second harmonic component --- low-voltage ride-through (LVRT) field test data --- complex terrain --- terrain-induced turbulence --- turbulence intensity --- LES --- vortex shedding --- frequency control --- wind power integration --- power system stability --- turbulence --- statistical modelling --- Wind Turbine (WT) --- Doubly Fed Induction Generator (DFIG) --- unbalanced grid voltage --- DC-linked voltage control --- Proportional Resonant with Resonant Harmonic Compensator (PR+HC) controller --- Adaptive Proportional Integral (API) control --- power control --- wind turbine near wake --- wind turbine wakes --- wake aerodynamics --- computational fluid dynamics --- rotor aerodynamics --- wind turbine validation --- MEXICO experiment --- wind energy --- model validation --- wind turbine aerodynamics --- wind farms --- wind turbines interaction --- wind farm modeling --- kernel density estimation --- multiple wind farms --- joint probability density --- ordinal optimization --- reactive power capability --- wind power plant --- wind power collection system --- aggregated, modelling --- wind integration studies --- long term voltage stability --- fault-ride through capability --- IEC 61400-27-1 --- Spanish PO 12.3 --- Type 3 wind turbine --- inertia --- wind power --- droop --- primary control --- frequency containment process --- wind integration --- demand response --- ancillary services --- wind turbine nacelle --- lightning electromagnetic pulse (LEMP) --- magnetic field intensity --- shielding mesh --- wake steering --- yaw misalignment --- multi body simulation --- main bearing loads --- rain flow counts --- aeroelasticity --- multi-rotor system --- wind turbine --- computational fluid dynamics (CFD) --- horizontal-axis wind turbine (HAWT) --- permanent-magnet synchronous-generator (PMSG) --- linear quadratic regulator (LQR) --- PI control algorithm --- LQR-PI control --- wind turbine blade --- large-eddy simulation --- turbulence evaluation index --- fatigue damage evaluation index --- DIgSILENT-PowerFactory --- MATLAB --- transient stability --- type 3 wind turbine --- DFIG --- field testing --- full-scale converter --- generic model --- validation --- HAWT --- aerodynamic characteristics --- dynamic yawing process --- near wake --- start-stop yaw velocity --- load frequency control (LFC) --- equivalent input disturbance (EID) --- active disturbance rejection control (ADRC) --- wind --- linear matrix inequalities (LMI) --- dynamic modeling --- grey-box parameter identification --- subspace identification --- recursive least squares --- optimal identification --- bearing current --- common mode current --- doubly fed induction generators --- permanent magnet synchronous generators --- wind turbine generator --- doubly-fed generator --- converter control --- short-circuit current --- second harmonic component --- low-voltage ride-through (LVRT) field test data --- complex terrain --- terrain-induced turbulence --- turbulence intensity --- LES --- vortex shedding --- frequency control --- wind power integration --- power system stability --- turbulence --- statistical modelling --- Wind Turbine (WT) --- Doubly Fed Induction Generator (DFIG) --- unbalanced grid voltage --- DC-linked voltage control --- Proportional Resonant with Resonant Harmonic Compensator (PR+HC) controller --- Adaptive Proportional Integral (API) control --- power control --- wind turbine near wake --- wind turbine wakes --- wake aerodynamics --- computational fluid dynamics --- rotor aerodynamics --- wind turbine validation --- MEXICO experiment --- wind energy --- model validation --- wind turbine aerodynamics --- wind farms --- wind turbines interaction --- wind farm modeling --- kernel density estimation --- multiple wind farms --- joint probability density --- ordinal optimization --- reactive power capability --- wind power plant --- wind power collection system --- aggregated, modelling --- wind integration studies --- long term voltage stability --- fault-ride through capability --- IEC 61400-27-1 --- Spanish PO 12.3 --- Type 3 wind turbine --- inertia --- wind power --- droop --- primary control --- frequency containment process --- wind integration --- demand response --- ancillary services --- wind turbine nacelle --- lightning electromagnetic pulse (LEMP) --- magnetic field intensity --- shielding mesh --- wake steering --- yaw misalignment --- multi body simulation --- main bearing loads --- rain flow counts --- aeroelasticity --- multi-rotor system --- wind turbine --- computational fluid dynamics (CFD) --- horizontal-axis wind turbine (HAWT) --- permanent-magnet synchronous-generator (PMSG) --- linear quadratic regulator (LQR) --- PI control algorithm --- LQR-PI control --- wind turbine blade --- large-eddy simulation --- turbulence evaluation index --- fatigue damage evaluation index --- DIgSILENT-PowerFactory --- MATLAB --- transient stability --- type 3 wind turbine --- DFIG --- field testing --- full-scale converter --- generic model --- validation --- HAWT --- aerodynamic characteristics --- dynamic yawing process --- near wake --- start-stop yaw velocity --- load frequency control (LFC) --- equivalent input disturbance (EID) --- active disturbance rejection control (ADRC) --- wind --- linear matrix inequalities (LMI) --- dynamic modeling --- grey-box parameter identification --- subspace identification --- recursive least squares --- optimal identification

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Wind Power Plant (WPP) and Wind Turbine (WT) modeling are becoming of key importance due to the relevant wind-generation impact on power systems. Wind integration into power systems must be carefully analyzed to forecast the effects on grid stability and reliability. Different agents, such as Transmission System Operators (TSOs) and Distribution System Operators (DSOs), focus on transient analyses. Wind turbine manufacturers, power system software developers, and technical consultants are also involved. WPP and WT dynamic models are often divided into two types: detailed and simplified. Detailed models are used for Electro-Magnetic Transient (EMT) simulations, providing both electrical and mechanical responses with high accuracy during short time intervals. Simplified models, also known as standard or generic models, are designed to give reliable responses, avoiding high computational resources. Simplified models are commonly used by TSOs and DSOs to carry out different transient stability studies, including loss of generation, switching of power lines or balanced faults, etc., Assessment and validation of such dynamic models is also a major issue due to the importance and difficulty of collecting real data. Solutions facing all these challenges, including the development, validation and application of WT and WPP models are presented in this Issue.

bearing current --- common mode current --- doubly fed induction generators --- permanent magnet synchronous generators --- wind turbine generator --- doubly-fed generator --- converter control --- short-circuit current --- second harmonic component --- low-voltage ride-through (LVRT) field test data --- complex terrain --- terrain-induced turbulence --- turbulence intensity --- LES --- vortex shedding --- frequency control --- wind power integration --- power system stability --- turbulence --- statistical modelling --- Wind Turbine (WT) --- Doubly Fed Induction Generator (DFIG) --- unbalanced grid voltage --- DC-linked voltage control --- Proportional Resonant with Resonant Harmonic Compensator (PR+HC) controller --- Adaptive Proportional Integral (API) control --- power control --- wind turbine near wake --- wind turbine wakes --- wake aerodynamics --- computational fluid dynamics --- rotor aerodynamics --- wind turbine validation --- MEXICO experiment --- wind energy --- model validation --- wind turbine aerodynamics --- wind farms --- wind turbines interaction --- wind farm modeling --- kernel density estimation --- multiple wind farms --- joint probability density --- ordinal optimization --- reactive power capability --- wind power plant --- wind power collection system --- aggregated, modelling --- wind integration studies --- long term voltage stability --- fault-ride through capability --- IEC 61400-27-1 --- Spanish PO 12.3 --- Type 3 wind turbine --- inertia --- wind power --- droop --- primary control --- frequency containment process --- wind integration --- demand response --- ancillary services --- wind turbine nacelle --- lightning electromagnetic pulse (LEMP) --- magnetic field intensity --- shielding mesh --- wake steering --- yaw misalignment --- multi body simulation --- main bearing loads --- rain flow counts --- aeroelasticity --- multi-rotor system --- wind turbine --- computational fluid dynamics (CFD) --- horizontal-axis wind turbine (HAWT) --- permanent-magnet synchronous-generator (PMSG) --- linear quadratic regulator (LQR) --- PI control algorithm --- LQR-PI control --- wind turbine blade --- large-eddy simulation --- turbulence evaluation index --- fatigue damage evaluation index --- DIgSILENT-PowerFactory --- MATLAB --- transient stability --- type 3 wind turbine --- DFIG --- field testing --- full-scale converter --- generic model --- validation --- HAWT --- aerodynamic characteristics --- dynamic yawing process --- near wake --- start-stop yaw velocity --- load frequency control (LFC) --- equivalent input disturbance (EID) --- active disturbance rejection control (ADRC) --- wind --- linear matrix inequalities (LMI) --- dynamic modeling --- grey-box parameter identification --- subspace identification --- recursive least squares --- optimal identification