A5032182382- Power Transformer Diagnostics and Insulation
- High voltage insulation and dielectric phenomena
- Smart Grid and Power Systems
- Traumatic Brain Injury and Neurovascular Disturbances
- Thermal Analysis in Power Transmission
- Metallurgical Processes and Thermodynamics
- Traumatic Brain Injury Research
- Magnetic Properties and Applications
- High-Voltage Power Transmission Systems
- Nanofluid Flow and Heat Transfer
- Corrosion Behavior and Inhibition
- Time Series Analysis and Forecasting
- Power Systems and Renewable Energy
- Concrete Corrosion and Durability
- Lightning and Electromagnetic Phenomena
- Real-time simulation and control systems
- Power Line Inspection Robots
- Vibration and Dynamic Analysis
- Modeling, Simulation, and Optimization
- Brain Tumor Detection and Classification
- Advanced Sensor and Control Systems
- Fluid dynamics and aerodynamics studies
- Power System Optimization and Stability
- Physics of Superconductivity and Magnetism
- CCD and CMOS Imaging Sensors
Xi'an Jiaotong University
2010-2025
Nanchang University
2024
University of Manchester
2016-2024
Xi’an Children’s Hospital
2023
Beijing University of Chemical Technology
2023
Global Energy Interconnection Research Institute North America
2021-2022
Manchester Metropolitan University
2021
Shandong Academy of Agricultural Sciences
2021
Huawei Technologies (China)
2021
China Electric Equipment Group (China)
2020
In this paper, a methodology is developed to use data acquisition derived from condition monitoring and standard diagnosis for rehabilitation purposes of transformers. The interpretation understanding the test are obtained international standards determine current an attempt ascertain priorities, effective methods selected transformer diagnosis. particular, standardization diagnostic analytical techniques being improved that will enable field personnel more easily results reduce need by...
A large electrocaloric effect (ECE) near room temperature is reported in Sn doped BaTiO3 ceramics. By tuning Ba(Ti1−xSnx)O3 compositions which also exhibit relaxor ferroelectric response to the invariant critical point, bulk ceramics at x ∼ 0.12 a EC coefficient (ΔT/ΔE =0.27*10−6K⋅mV−1) over 50 K range. In addition that, diffuse phase transition successfully applied broaden peaks under low electric field. These properties added together indicate general solution of materials with high...
Cigarette butts, one of the most ubiquitous forms garbage in world, need to be recycled because their toxicity can kill saltwater and freshwater fish. In this study, cigarette butts are applied as corrosion inhibitors for N80 steel at 90 °C hydrochloric acid. Weight loss electrochemical techniques used evaluate inhibitive effect butt water extracts. Results show that inhibition efficiencies arrive 94.6% 91.7% 10% 15% (wt %) HCl solution, respectively, by adding 5% inhibitor. 20% they a...
Electroencephalogram (EEG) provides a non-invasive, highly accessible, and cost-effective solution for Alzheimer's Disease (AD) detection. However, existing methods, whether based on manual feature extraction or deep learning, face two major challenges: the lack of large-scale datasets robust learning evaluation, poor detection performance due to inter-subject variations. To address these challenges, we curate an EEG-AD corpus containing 813 subjects, which forms world's largest dataset best...
The heterogeneous injuries and resulting cognitive deficits pose significant challenges in the clinical management of mild traumatic brain injury (mTBI). However, pathophysiological mechanisms related to heterogeneities mTBI are still unclear. This study aims explore underlying remodeling by examining morphometric similarity (MS) alterations corresponding transcriptomic signatures across adult pediatric (adult mTBI: 112 acute patients, 47 follow-up chronic 66 healthy controls [HCs]; 30 31...
The procedures of asset-management have been developed into a central element network operation and planning in liberalised electric markets power supply for the present. method asset management considers all relevant life cycle cost related to equipment provides strategies reinvestment, maintenance fault elimination. However, requires practical information about available failure statistic from distribution networks, as well reliability evaluation installed network. For quantitative we...
The hot-spot factor (H) is a crucial component of the thermal diagram in IEC 60076-2 to derive temperature from test data. In this paper, H expressed as sum two separable components, one relating convection fluid domain and other conduction solid domain. Dimensional analyses on flow heat transfer show that both components are functions dimensionless winding geometry, loss distribution, Re Pr. relationship between Pr for fixed geometry with uniform distribution obtained by conducting...
In this paper, a method for predicting pressure drop and flow distribution in disc-type transformer windings an oil-forced directed cooling mode is proposed. First, dimensional analyses are conducted to identify the independent dimensionless variables that affect over winding. Next, parametric sweeps performed with computational fluid dynamics simulations under isothermal conditions. Finally, results obtained from correlated previously identified derive correlation equations. These equations...
The thermal design of a power transformer determines its lifetime and loading capability, so correct modelling liquid flow temperature distributions in the winding is vital importance. Existing standards widely used simple calculation models can seriously under/overestimate hotspot temperatures under certain circumstances. In this paper, physical model representing disc-type forced directed cooling mode are investigated experimentally using Particle Image Velocimetry (PIV) measurement system...
More-electric-aircrafts (MEAs) are heading towards larger power, higher voltage, and more optimum architectures, it is extremely important to understand partial discharge (PD) behaviors under the challenging aeronautical power systems. PD pressure of 1–101 kPa frequency 50–1000 Hz studied emulate practical situation with consideration insulation defects from electric machine windings. The high current transformer (HFCT) specifically employed pick up signals. Experimental results indicate...
The liquid flow and temperature distributions in oil natural (ON) cooled power transformer windings are of great importance for thermal design, rating life estimation ON transformers. In this paper, both experimental numerical investigations a disc-type winding model conducted. influences representative operating conditions on studied using Particle Image Velocimetry (PIV) measuring systems. Reverse flows consequential localised overheating at the top part passes recorded experiments. 2D 3D...
The chemical compositions of cigarette butts water extracts mainly are aromatic amines including nicotine and its compounds. If oxygen exists, the amine compounds can be oxidized easily. Whether this oxidation would beneficial in enhancing corrosion inhibitive effect inhibitor is not known. In study, aerobic anaerobic compared on N80 steel at 90 °C 15% (weight %) hydrochloric acid. also contrasted. Weight loss, X-ray diffraction, electrochemical techniques (such as noise, impedance,...
The chemical conversion of films on Ag surfaces to in aqueous iodide solutions has been studied electrochemically. were grown potentiostatically and then exposed solutions. process was followed at open-circuit potential using cathodic stripping voltammetry performed after various exposure periods. showed a sudden drop the completion , reaching steady-state value close equilibrium for solution. This allowed easy determination total reaction time required complete . Distinctly separated...
Our experiment shows that the thermal emission of phonon can be controlled by magnetic resonance (MR) mode in a metasurface (MTS). Through changing structural parameter metasurface, MR wavelength tuned to wavelength. This introduces strong coupling between and MR, which results an anticrossing phonon-plasmons mode. In process, we manipulate polarization angular radiation phonon. Such provides new kind structures for various management applications.
Oil-flow distribution in the winding has a direct impact on cooling performance. In addition, static pressure drop over determines oil split among windings connected hydraulically parallel. this paper, experimental verifications are provided to support computational fluid dynamics (CFD) simulations for disc-type oil-forced and directed (OD) modes. models measured using particle image velocimetry system differential instrument, respectively. Dimensional analysis is adopted analyze...
Real-time thermal capacity estimation is not only part of prognostics and health management but also determines the dynamic loading capability traction transformer. The hot-spot temperature (HST) vital parameter for real-time estimation. In high-speed railway, unbalanced loads two phases transformer cause winding losses therefore affect top-oil further influence HST in each phase. order to explore performance under load (current), a model calculating was proposed incorporating interaction...
In this paper, dimensional analysis is adopted to study fluid flow distribution and temperature in disc-type ON (oil natural) cooled transformer windings. Theoretical on the thermal driving force pressure drop liquid circulation loop also performed determine total rate transformer. The performance of three different liquids, a hydrocarbon mineral oil, gas-to-liquid (GTL) oil synthetic ester are investigated using computational dynamics (CFD) simulations, based understanding from rates...
Demand response has been intensively studied in recent years. It can motivate customers to change their consumption patterns according the dynamic (time-varying) electricity price, which is considered be most cost-effective and reliable solution for smoothing demand curve. However, many existing schemes, based on users' request each period, require users consume requested exactly, sometimes causes inconvenience losses utility, because cannot always able accurate due various personal reasons....
Integration of low carbon technologies poses a technical challenge on distribution transformers due to the dynamic loading and potentially frequent overloading scenarios. Transformer thermal rating is hence required, which most economical approach tackle this ensure safe operation. To reach aim, it important enhance accuracy model, where top‐oil temperature key parameter. In study, wide range constant load temperature‐rise tests were carried out an 11/0.433 kV transformer study behaviour...
In this paper dimensional analyses of flow distribution in and pressure drop over disc-type transformer windings an oil forced directed (OD) cooling mode are presented. Computational fluid dynamics (CFD) parametric sweeps were conducted to quantify the dimensionless relationships obtained from form predictive correlation equation sets. With help sets, influences coolant types including a mineral oil, gas-to-liquid (GTL) synthetic ester on winding model investigated. It was found that ester,...