A5103039441- HVDC Systems and Fault Protection
- Advanced Computational Techniques and Applications
- Aerosol Filtration and Electrostatic Precipitation
- Aquaculture Nutrition and Growth
- Power Systems and Technologies
- High-Voltage Power Transmission Systems
- High voltage insulation and dielectric phenomena
- Aquaculture disease management and microbiota
- Smart Grid and Power Systems
- Thermal Analysis in Power Transmission
- Electromagnetic Simulation and Numerical Methods
- Environmental Toxicology and Ecotoxicology
- Microgrid Control and Optimization
- Advanced Numerical Methods in Computational Mathematics
- Geotechnical Engineering and Soil Mechanics
- Simulation and Modeling Applications
- Advanced Control Systems Optimization
- Power Line Communications and Noise
- Embedded Systems and FPGA Design
- Electromagnetic Scattering and Analysis
- Hepatocellular Carcinoma Treatment and Prognosis
- Multilevel Inverters and Converters
- Power Systems Fault Detection
- Smart Grid Security and Resilience
- Smart Parking Systems Research
Ministry of Agriculture and Rural Affairs
2024
Chinese Academy of Fishery Sciences
2024
Zhongda Hospital Southeast University
2024
Inner Mongolia Electric Power (China)
2023
Wuhan University
2022
Guilin University of Technology
2019-2020
Harbin Institute of Technology
2019
Shanghai Electric (China)
2017
Electric Power Research Institute
2014
Henan University of Traditional Chinese Medicine
2009
LI-RADS Treatment Response Algorithm (TRA) version 2024 (v2024) introduced separate algorithms for detecting hepatocellular carcinoma (HCC) viability after radiation and nonradiation locoregional therapies (LRT). The algorithm incorporated MRI-based ancillary features to optionally upgrade lesions from LR-TR Equivocal Viable.
With the improvement of voltage level DC overhead transmission lines (OHTLs), audible noise (AN) caused by corona discharge conductors is an increasingly serious problem. AN has become a critical parameter that determines selection conductors, line structures and specifications for UHVdc OHTLs in high-altitude areas. To study altitude correction method OHTLs, we erected 6 × 720 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> 900 on...
With the development of IEC 61850 smart substations, emerging cybersecurity vulnerabilities in supervisory control and data acquisition (SCADA) systems are becoming an urgent engineering issue for modern substations. This paper proposes a novel intrusion detection system (IDS) tailored The proposed IDS analyzes multidimensional physical knowledge behaviors to provide comprehensive effective solution that is able mitigate various cyber threats. based approach comprises access detection,...
A 30-pulse rectifier using passive voltage harmonic injection method at dc link is proposed in this article. The circuit has a function to reduce the characteristic harmonics of input voltage. Through injecting square wave whose frequency six times supply into rectifier, some existing reduced, so that steps number increases from 18 30. equivalent model bridges established. switching functions and are analyzed, operation modes obtained, then formation processes quantitative relationship...
The reliable operation of the relay protection equipment and its secondary circuit is an important factor to ensure safety stability power grid. It great significance improve maintenance efficiency circuit. In this paper, design intelligent mobile management system based on wireless virtual private network elaborated, including architecture deployment mode communication network. addition, information synchronization methods between statistical analysis module, condition-based assistant...
Substation configuration description (SCD) plays a significant role in IEC 61850 smart substations. This paper analyses present situations of SCD application and proposes an effective solution secondary system visualization intelligent diagnosis for substations using approved model. It is possible to realize various advanced applications object-oriented management substation based on the complete model, which will provide reliable technical support operation without human being, dispatching...
Thyristor-controlled series capacitor (TCSC) characteristic curves of fundamental frequency impedance change with line current considering thyristor conduction characteristic, which results in experimental deviation when using the open-loop control. To end this, this study derives TCSC mathematic model to reveal theoretical mechanism that changes currents. This proposes two new look-up table approaches mitigate least square approach three-point quadratic interpolation and linear algorithms....
Abstract The audible noise (AN) of HVDC transmission lines, as an external manifestation the corona discharge, intensifies with increase altitude. In high‐altitude area, AN has been a key factor in determining type conductors for lines. order to study characteristics current and lines at high‐altitude, we erected test line altitude 4300 m, carried out tests under different voltages. Through test, basic data were obtained. Based on curve, inception electric field strength conductor was...
Due to the topology of MMC base MTDC grid, fault transient current has these characterisitcs fast rise rate and high peak value after a DC side fault. In order limit current, current-limiting reactors are generally installed at both ends line in flexible thus providing boundary for protection. The analysis shows polarity characteristics reactor voltages between faulted normal different pole-to-ground case pole-to-pole fault, voltage on same bus different. Therefore, identification criterion...
Numerical modeling of geophysical electromagnetic induction problem requires solving low-frequency time-harmonic Maxwell's equations. Conventional nodal base finite element method is not suitable for computing field in inhomogeneous conductivity structure. An improved proposed. In this scheme, the divergence equation Gauss's law containing governing equations, electrical fields are decomposed into two parts divergence-free and curl free, a stabilizing term introduced double-curl equation....
Due to space limitations of transmission corridors, ultrahigh voltage (UHV) lines inevitably cross over other lines. UHV in a crossover section have lightning shielding effect similar that conductor lower While, whether 500-kV line below meets the protection requirements is unknown. Therefore, calculation method for failure trip rate three-dimensional proposed. The without ground wire was performed. results revealed positively correlated with length and negatively crossing angle upper line....
Digitized sampling adopts decentralized, independent mode, which introduces a new problem of data synchronization to secondary system substations, especially for relay protections. This paper analyzes the time delay every sections in and causes non-synchronized data. It states two general applied method smart substations at present, one is based on external synchronizing signal while other interpolation resampling. The also compares important indexes digital sampling, rated phase error. Then...
The audible noise (AN) of HVDC transmission line at high altitude area is the key factor to determine conductor type. However, research on AN unipolar lines relatively lacking present. In this paper, three DC test with an 1700 m – 4300 were used carry out tests under different surface electric field strengths, and influence A-weighted sound level spectral characteristics obtained. results show that, presents a nonlinear trend change. When strength larger, law more obvious. addition,...
3D magnetotelluric modeling requires solving low-frequency plane wave electromagnetic induction problems. A mixed finite element method is proposed for computing the electric field in a conductivity model of Earth source. The scheme augments curl-curl equation utilizing Helmholtz decomposition electrical into its divergence-free and curl-free components, enforces explicitly continuity condition current density boundary-value problem. discretization formulation leads to linear system...