A5100452896- High voltage insulation and dielectric phenomena
- Power Transformer Diagnostics and Insulation
- Silicone and Siloxane Chemistry
- Aerosol Filtration and Electrostatic Precipitation
- Luminescence Properties of Advanced Materials
- Dielectric materials and actuators
- Polymer Nanocomposite Synthesis and Irradiation
- Plasma Diagnostics and Applications
- Lightning and Electromagnetic Phenomena
- Advanced Sensor and Energy Harvesting Materials
- Thermal Analysis in Power Transmission
- Synthesis and properties of polymers
- High-Energy Particle Collisions Research
- Electrostatic Discharge in Electronics
- Perovskite Materials and Applications
- Welding Techniques and Residual Stresses
- Polymer Nanocomposites and Properties
- High Entropy Alloys Studies
- Advanced Photocatalysis Techniques
- Metal Alloys Wear and Properties
- Advanced Memory and Neural Computing
- Quantum Chromodynamics and Particle Interactions
- Carbon Dioxide Capture Technologies
- Semiconductor Quantum Structures and Devices
- Liquid Crystal Research Advancements
North China Electric Power University
2018-2025
Northwestern Polytechnical University
2024
Guangdong University of Technology
2023-2024
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
2024
Batangas State University
2024
University of Science and Technology of China
2023
Beijing Aerospace Flight Control Center
2020
Central South University
2020
State Key Laboratory of High Performance Complex Manufacturing
2020
Hubei University
2017
Spacers are key components that used to support high voltage conductors in gas-insulated substations or lines. The analysis of the surface charge patterns on spacers remains a difficult task, which requires comprehensive understanding physical mechanism gas-solid interface charging phenomenon. In this letter, we reported field dependent property accumulation under DC stress. We verified finding through experiment, and further, put forward field-dependent model based dominant transport...
Broadband near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) hold promising potential as next-generation compact, portable, and intelligent NIR light sources. Nonetheless, the lack of high-performance broadband phosphors with an emission peak beyond 900 nm has severely hindered development widespread application pc-LEDs. This study presents a strategy for precise control energy-state coupling in spinel solid solutions composed MgxZn1–xGa2O4 to tune emissions Cr3+...
Surface charge accumulation on the spacers is one of key issues restraining development HVDC GIS/GIL. The precise measurement surface properties provides basis for further study transport mechanism as well charge-induced flashover under DC voltage. In this study, authors discuss their perspective current status, needs and potential developing orientation characterisation techniques. Different methods inversion algorithms are reviewed regarding previous studies future research needs....
The construction of the future energy structure China under 2050 carbon-neutral vision requires compact direct current (DC) gas-insulation equipment as important nodes and solutions to support electric power transmission distribution long-distance large-capacity. This paper reviews China's 10-year progress in DC gas-insulated equipment. Important progresses basic research industry perspective are presented, with related scientific issues technical bottlenecks being discussed. worldwide...
Gas-insulated equipment (GIE) that utilizes the most potent greenhouse gas sulfur hexafluoride (SF <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</inf> ) as insulation and arc-quenching medium has been widely used in power industry. Seeking eco-friendly insulating with advanced performance for next-generation SF -free GIE is significant "net-zero" goal sustainable development. In this paper, utilization, emission, reduction policies of around...
Interface engineering, by modulating defect distribution and impedance at interfaces inducing interfacial polarization, has proven to be an effective strategy for optimizing dielectric properties. However, the inherent incompatibility between heterogeneous phases presents a significant challenge in constructing multi-heterointerfaces understanding how their influences performance. Herein, we constructed EGaIn@Ni/NiO/Ga
Environmentally friendly DC gas insulated transmission line (GIL) is currently one of the hot topics in advanced electric power equipment. Recently, fluoronitriles have been widely studied and considered to replace SF6 GILs. In this paper, breakdown voltage, insulator flashover partial discharge inception voltage fluoronitriles/CO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> mixtures are reported a field. The mole ratio mixed gases 4...
The application of environmentally friendly gases to insulated transmission pipelines could potentially improve the flexibility line corridors and reduce environmental impact such lines. Recently, C <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> F xmlns:xlink="http://www.w3.org/1999/xlink">7</sub> CN has been considered as a potential replacement for SF xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> . present work assesses...
Gas-insulated metal-enclosed switchgear (GIS) generates metal particles during operation, which will affect the insulation performance of equipment, and linear move to high voltage electrode form firefly movement. Based on this, this paper takes as research object, uses multi-physics simulation model GIS bus in actual conditions, calculates charge distribution characteristics electromagnetic force chamber, explains mechanism movement high-voltage coating, lifting particles, explores...
Polymer-based dielectric films are increasingly demanded for devices under high electric fields used in new energy vehicles, photovoltaic grid connections, oil and gas exploration, aerospace. However, leakage current is one of the significant factors limiting improvement insulation performance. This paper tested condensed state structure characteristics biaxially oriented polypropylene (BOPP) obtained nonlinear BOPP range 40-440 V/μm 40-110 °C. The conduction mechanisms hopping conductivity...
Charging of insulators modifies local electric field distribution and increases potential threat to the safety gas insulated equipment. In this paper, surface charge tailoring techniques are classified reviewed by introducing a Dam-flood model. Technical solutions different methods compared discussed. The outlook suppress accumulation is recommended discussed based on industrial consideration. This paper serves as guide handbook for engineers researchers into study methods. Meanwhile, we...
This paper introduces an HVDC SF6/N2 gas-insulated transmission line (GIL) prototype that operates under 100-kV DC application. In the first part, development history of GIL products over past 50 years is reviewed. After that, design concept ±100-kV introduced. A was prepared and withstanding voltage test superimposed lightning impulse were performed. The results show this passed all required tests, including hydrostatic test, gas tightness thermal cycling etc. successful preparation product...
The hetero-polar charges on the spacer surface due to gas ionization has been verified as one of hazard charge sources threatening safe operation HVDC gas-insulated transmission line (GIL). This letter reports differences in charging properties spacers SF6 and C3F7CN/CO2 mixtures, a rigorous re-examination environmental firendly assessment for DC GIL is introduced. results show that when maximum value electrical field strength at 0.45 kV mm−1, homo-polar potential different insulating gases...
In this paper, Fe–Cr–C–W surfacing alloys was prepared by adopting arc additive technology with optimized Cr and W contents in flux-cored wire. The microstructure, hard phase, hardness wear resistance of investigated optical microscopy, electron testing. results show that the increase W, microstructure changes from full ferrite to martensite, ferrite, retained austenite, carbides other multiphase such as (Cr, Fe)7C3, WC Fe2W, etc. damage behavior gradually severe abrasive a small amount...
Abstract The strain clamps and leading wires are important components that connect conductors on overhead transmission lines conduct current. During operation, poor contact between these can cause abnormal overheating, to electric failures threatening power system reliability. Recently, the use of unmanned aerial vehicles equipped with infrared thermal imagers for clamp wire maintenance has become increasingly popular. Deep learning‐based image recognition shows promising prospects...
Abstract As one of the fundamental physical quantities, temperature is extremely important in various fields. In order to study sensing characteristics dual‐emitting center phosphors, Bi 3+ ‐doped and /Sm Sr 2 Ga GeO 7 phosphors were synthesized by high‐temperature solid‐phase method. Under 312 nm excitation, :Bi phosphor exhibits a blue broadband emission corresponding 3 P 1 → S 0 transition ions. By testing change spectrum it was found that exhibited strong thermal sensitivity. However,...