A5100319251- High voltage insulation and dielectric phenomena
- Dielectric materials and actuators
- Power Transformer Diagnostics and Insulation
- Electrostatic Discharge in Electronics
- Lightning and Electromagnetic Phenomena
- Advanced Sensor and Energy Harvesting Materials
- Advanced Thermoelectric Materials and Devices
- Electrical Fault Detection and Protection
- Material Properties and Processing
- Polymer Nanocomposite Synthesis and Irradiation
- Infrastructure Maintenance and Monitoring
- Electromagnetic wave absorption materials
- Heat Transfer and Optimization
- Polymer crystallization and properties
- Thermal properties of materials
- Thermal Radiation and Cooling Technologies
- Advancements in Battery Materials
- Recycling and Waste Management Techniques
- Magnetic Properties and Synthesis of Ferrites
- Polymer Nanocomposites and Properties
Xi'an Jiaotong University
2012-2025
State Key Laboratory of Electrical Insulation and Power Equipment
2025
Shaanxi University of Technology
2017-2023
Hangzhou Dianzi University
2023
In order to investigate the differences of space charge distribution XLPE aged at temperatures below and above melting point, thermo-oxidative ageing was conducted on 110 kV cross-linked polyethylene (XLPE) cable insulation 100 °C much elevated temperature 160 respectively. The showed moderate changes micro-structure until moment when Oxidation Induction Time (OIT) dropped zero. It deduced by results Fourier Transform Infrared (FTIR) Spectroscopy, X-Ray Diffraction (XRD), Differential...
In this paper, the existence of copper-rich impurities in XLPE cable insulation is found by means thermal-oxidative ageing. The emergence impurities, shown as dark islands XLPE, proposed to be a critical point dramatic degradation dielectric performance. It was deduced XRD and DSC tests that ageing at elevated temperature leads enhanced interplanar spacing lamellar spacing, well decreased crystallinity for around impurities. Meanwhile, cracks branch-type which can regarded generation...
Solar thermoelectric generators (STEGs) convert solar heat into electricity, attracting interest in powering various Internet-of-Things devices. The conventional route to design a STEG involves separate considerations of thermal engineering and...
Ferrite with high permeability, magnetic loss, and a low Curie temperature is highly promising material for hyperthermia applications in cancer treatment. In this work, Ni(0.29-x)MgxCu0.14Zn0.60Fe1.94O3.94 (NiMgCuZn) ferrites were prepared at different Mg ion concentrations. The dependence of the contents on crystal structure, magnetic, permeability properties NiMgCuZn ferrite was investigated. Structural characterization showed crystallinity materials an increase lattice constant content....
The role of DCP on the space charge performance XLPE was investigated in this paper. Space accumulation characteristics samples were researched through pulsed electro-acoustic (PEA) and trapping behavior studied by surface potential decay (SPD). results show that sample without is injected with homo-charges. However, increase concentration, hetero-charges are firstly found then homo-charges can be higher concentration DCP. Less as well more shallow traps 1wt% 1.5wt% It indicated change...
In this paper, the role of degassing process on dielectric performance 110 kV XLPE cable insulation is investigated. The undegassed degassed at 70°C in laboratory for different duration terms heating time, to prepare samples with weight loss ratio. Fourier Transform Infrared Spectroscopy (FTIR) test, electric breakdown test 50 Hz, and Pulsed Electro-acoustic (PEA) measurement are carried out samples. FTIR spectrogram, characteristic absorption peaks locate 1680cm <sup...
It is of great importance to assess the reliability on-site testing for extruded insulation cables. In present work, effect applied field frequency on breakdown performance cross-linked polyethylene (XLPE) was investigated. An inserted needle embedded into a 10 kV commercial XLPE cable along radial direction simulate real defects. The shape artificial defects precisely controlled by designed mold with micrometer. Breakdown tests were conducted in transformer oil at room temperature using...
Download This Paper Open PDF in Browser Add to My Library Share: Permalink Using these links will ensure access this page indefinitely Copy URL DOI
The influence of different aging modes on the space charge accumulation properties and physicochemical insulating materials in cross-linked polyethylene (XLPE) cables was investigated. XLPE samples were obtained from unaged cables, 1-year laboratory accelerated aged 30-year practical cables. Pulsed electro-acoustic (PEA) technique used to measure distribution materials. Fourier-Transform Infrared (FTIR) Thermo-gravimetric analysis reveal details their properties. It found that homo-charges...
The condition diagnosis of XLPE cable insulation was studied in this paper. AC breakdown test and differential scanning calorimetry (DSC) measurement were conducted to investigate the dependence ageing state on thermal dielectric parameters. results show that strength increases slightly at first then decreases significantly with time, which is closely related crystallinity. Besides, it shown a strong correlation exists between macro properties microscopic Then effective parameters obtained...