A5100639951- HVDC Systems and Fault Protection
- High-Voltage Power Transmission Systems
- Power Systems Fault Detection
- Silicon Carbide Semiconductor Technologies
- Cardiac Structural Anomalies and Repair
- Lightning and Electromagnetic Phenomena
- Electrical Fault Detection and Protection
- COVID-19 diagnosis using AI
- COVID-19 Clinical Research Studies
- Islanding Detection in Power Systems
- Power Systems and Technologies
- High voltage insulation and dielectric phenomena
- Smart Grid and Power Systems
- Scoliosis diagnosis and treatment
- Advanced battery technologies research
- Superconductivity in MgB2 and Alloys
- Spine and Intervertebral Disc Pathology
- Power Systems and Renewable Energy
- Full-Duplex Wireless Communications
- Microgrid Control and Optimization
- Wind Turbine Control Systems
- Cancer Risks and Factors
- Advanced Battery Materials and Technologies
- Stellar, planetary, and galactic studies
- Monoclonal and Polyclonal Antibodies Research
Zhejiang Chinese Medical University
2024-2025
Hangzhou Hospital of Traditional Chinese Medicine
2024-2025
Tianjin University
2016-2025
Qingdao University
2025
Xiangya Hospital Central South University
2025
Central South University
2025
Xiamen University of Technology
2024
Hunan University of Traditional Chinese Medicine
2023-2024
State Key Laboratory of Respiratory Disease
2024
Guangzhou Medical University
2024
Abstract The Solar Upper Transition Region Imager (SUTRI) onboard the Space Advanced Technology demonstration satellite (SATech-01), which was launched to a Sun-synchronous orbit at height of ∼500 km in 2022 July, aims test on-orbit performance our newly developed Sc/Si multi-layer reflecting mirror and 2k×2k EUV CMOS imaging camera take full-disk solar images Ne vii 46.5 nm spectral line with filter width ∼3 nm. SUTRI employs Ritchey–Chrétien optical system an aperture 18 cm. observations...
DC fault current limitation is important for the low-voltage dc distribution network, because existing selective protection cannot act fast enough. However, typical limiting method-installing reactors directly in system-will lead to negative influence on system normal operation and circuit breaker (DCCB) isolation. This paper proposed a novel solid-state (SSCB) with self-adapt capability, namely, no network operation, swift response fault, efficient cooperation between The hybrid...
The fast dc line protection is one of the key techniques for multi-terminal flexible grid whose main technical difficulty lies in quick and reliable fault identification. traditional principles ac system are not suitable grid, those conventional transmission can also be applied directly. Therefore, frequency-domain traveling-wave boundary characteristics after faults analyzed first this paper to find critical condition distinguishing internal external as well forward backward faults. And...
The superconductive fault current limiter (SFCL) is one of the most ideal solutions to limit dc in voltage source converter (VSC)-based system. With regard application SFCLs systems, not only dc-side but also currents at ac side and itself should be limited during a fault. Considering whole-system current-limiting capability, this paper analyzes applicability different VSC-based system according transient characteristics It concluded that resistive SFCL has better capability than others....
DC fault protection is the key technique for development of distribution and transmission system. This paper analyzes transient characteristics faults in a modular multilevel converter (MMC) based system combining with numerical method. Meanwhile, lots simulation tests on MATLAB/Simulink are carried out to verify correctness theoretical analysis. Finally, technological difficulties requirements isolation discussed provide foundation design dc strategy.
The overhead line will be widely applied in the future flexible high-voltage dc (HVDC) grid. Correspondingly, effective reclosing strategy which can identify fault property must configured for circuit breaker (DCCB) to improve system power supply reliability. However, if DCCB is reclosed directly, large second overcurrent may occur damage vulnerable devices system. Therefore, inherent voltage characteristic difference between different faults (nonpermanent or permanent) analyzed paper. And...
Fast and reliable direction criterion is important for the protection of multi-terminal HVDC grid, not only pilot protection, but also excluding backward fault in singleended protection. The criteria based on dc current variation (Δi) or change rate (di/dt) have been used transmission system. However, acting reliability influenced by high-transition resistance, line distributed capacitance, so on. Although boundary effect reactor excellent operation performance they are feasibility when...
Medium voltage direct current (MVdc) distribution system has numerous advantages over medium alternative system. However, two shortcomings of the existing hybrid circuit breaker (DCCB) with load switch, including high construction cost and operating losses, have constrained application DCCBs in MVdc To overcome these shortcomings, a novel multi-port DCCB negative source (NVS) been proposed this paper. First, general topology working principle NVS are presented. Then, focused on commutation...
In the flexible dc grid, fault propagates extremely fast. It requires protection and circuit breaker (DCCB) can identify isolate line very quickly, for healthy network ride-through, especially in multi-terminal grids. However, existing DCCB techniques grid still not match propagation speed. Therefore, a novel current-commutation-based current limiter (FCL) is proposed this paper. limit effectively, to guarantee converter continuous operation ride-through after faults, so requirement on...
Renewable energy integrated with hydrogen storage for power generation is a promising alternative achieving cleaner source transition. However, the volatility and intermittency of renewable pose significant challenges to safe efficient operation proton exchange membrane fuel cells (PEMFC) system. Due complex thermal-water-electrical fields coupling mechanism, quantitative analysis dynamic performance PEMFC under changes in system operating conditions at multiple time scales has not been...
Abstract Electrocatalyst presents a promising strategy for enhancing sulfur utilization and cycling stability in lithium‐sulfur (Li‐S) batteries, especially under demanding operational conditions. However, conventional catalytic strategies demonstrate undesirable effects high‐loading primarily attributed to the absence of efficient catalyst dispersion strategy. In this work, it successfully anchored diverse range Co‐containing catalysts uniformly onto COF‐derived carbon through unique...
Background High fasting plasma glucose (HFPG) has been identified as one of the risk factors associated with development breast cancer. The worldwide distribution cancer attributable to HFPG was not comprehensively investigated. Methods We utilized data from Global Burden Disease Study 2021 explore HFPG-related deaths, disability adjusted life years (DALYs) and corresponding age-standardized rates (ASRs). average annual percentage change (AAPC) estimated (EAPC) were employed evaluate...
There is an urgent need for the fault current limiter to guarantee stability of dc system. For this reason, improved inductive superconducting (SFCL) designed and its working principle addressed. By analyzing transient characteristics in modular multilevel converter based system, current-limiting effects proposed SFCL are studied detail. According requirements coordination among converter, circuit breaker, desired impedance discussed paper. Finally, effectiveness correctness analyses have...
In the multi-terminal flexible dc grid, it is important for healthy network to ride through fault. The converters should operate continuously after faults, staying unblocked. But existing selective protection and isolation method may fail react swiftly enough, because propagation speed of fault current extremely fast. This paper discussed limiting requirements proposed a calculation determine required reactor value, purpose converter continuous operation during faults. On this basis,...
The dc fault current increase rapidly and reach an unbreakable value when a occurs. Cutting off directly cost enormous energy cause voltage stresses for the converters, circuit breakers, etc. It is expected to use superconducting limiter (SFCL) limit current. In this paper, different types of SFCLs are introduced at beginning. Then current-limiting requirements SFCL analyzed. order satisfy these requirements, some essential technical indicators proposed. shall not only peak reduce...