A5100451107- Microgrid Control and Optimization
- HVDC Systems and Fault Protection
- Innovative concrete reinforcement materials
- Power Systems and Renewable Energy
- Concrete and Cement Materials Research
- Power System Optimization and Stability
- Engineering Diagnostics and Reliability
- Structural Behavior of Reinforced Concrete
- Geomechanics and Mining Engineering
- Simulation and Modeling Applications
- Islanding Detection in Power Systems
- Robot Manipulation and Learning
- Frequency Control in Power Systems
- Machine Fault Diagnosis Techniques
- Recycled Aggregate Concrete Performance
- Gear and Bearing Dynamics Analysis
- Tactile and Sensory Interactions
- Grouting, Rheology, and Soil Mechanics
- Civil and Geotechnical Engineering Research
- Geotechnical Engineering and Analysis
- Geotechnical Engineering and Soil Stabilization
- Muscle activation and electromyography studies
- Vehicle emissions and performance
- Smart Grid and Power Systems
- Advanced Measurement and Detection Methods
University of Hong Kong
2002-2024
Beijing Solar Energy Research Institute
2023-2024
Hunan University
2023-2024
Macau University of Science and Technology
2023
American Electric Power (United States)
2021-2022
Chengdu Surveying Geotechnical Research Institute
2022
University of South Florida
2015-2021
Carnegie Mellon University
2018-2020
Shanghai Ocean University
2020
Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute
2020
Oscillations have been observed in wind farms with weak grid interconnections. While Texas observes 4 Hz low-frequency oscillations, the west region China subsynchronous oscillations at 30 Hz. Furthermore, this oscillation mode caused torsional interactions a remote synchronous generator and led to shutdown of power plant. Inspired by those real-world events, paper aims present an analytical model type-4 grids that can demonstrate both frequency oscillations. Critical factors, e.g.,...
In 2017, three sub-synchronous resonance (SSR) events were reported in the transmission system of Electric Reliability Council Texas (ERCOT). These with different consequences are due to same cause, i.e., Type-3 wind farms radially connected a series compensated line. The objectives this paper are: 1) build testbed replicate these real-world and investigate what causes consequences; 2) find out impact penetration level speed on SSR; 3) how mitigate SSR. replication is built...
Amid ambitious net-zero goals and growing demands for freight logistics, addressing the climate challenges posed by heavy-duty truck (HDT) sector is an urgent pivotal task. This study develops integrated HDT model incorporating vehicle dynamic simulation life cycle analysis to quantify energy consumption, greenhouse gas (GHG) emissions, total cost of ownership associated with three emerging powertrain technologies in various use scenarios China, including battery electric, fuel cell hydrogen...
4 Hz oscillations and 30 have been observed in real-world wind farms with weak grid interconnections. Such stability issues limit power delivery. This paper proposes mechanism-based feedback control strategies suitable for vector based voltage source converters employed Type-3 Type-4 to enhance the overall system stability. Using a simplified linear model, we first demonstrate that root cause of issue is due coupling delivery at point common (PCC). Increasing leads reduction PCC voltage....
Voltage-current (V-I) droop control has been proposed for real and reactive power sharing. Compared with the conventional using power/frequency power/voltage, it enhances stability since adding a V-I is equivalent to providing resistor. However, system parallel converters droops, oscillations are observed when small coefficients adopted. In this paper, multi-input multioutput (MIMO) model of derived in frequency domain. This based on dq-reference frame consists converter network model, which...
Lithium slag (LS) is a waste residue generated during lithium extraction, posing significant environmental challenge due to its extensive accumulation. This study proposes method of utilizing thermally activated LS as the sole precursor for geopolymer synthesis. The thermal activation mechanism was investigated using XRD, FTIR, ICP, and SEM techniques, while exploring optimal composition geopolymers(LSG). research revealed that heating at 700 °C increased amorphous content from 15.9 % 48.1...
In this paper, we provide a method that injects the expressive shape deformations common in traditional 2D animation into an otherwise rigid 3D motion captured animation. We allow animator to modify frames rendered by redrawing key features such as silhouette curves. These changes are then integrated To perform integration, divide those can be made altering skeletal animation, and must character's mesh geometry. propagate other frames, introduce new image warping technique takes account...
Can a robot grasp an unknown object without seeing it? In this paper, we present tactile-sensing based approach to challenging problem of grasping novel objects prior knowledge their location or physical properties. Our key idea is combine touch localization with tactile re-grasping. To train our learning models, created large-scale dataset, including more than 30 RGB frames and over 2.8 million samples from 7800 interactions 52 objects. learn representation signals, propose unsupervised...
In this paper we study how to compute a dense depth map with panoramic field of view (e.g., 360 degrees) from multi-perspective panoramas. A sequence multiperspective panoramas is used for better accuracy and reduced ambiguity by taking advantage significant data redundancy. To speed up the reconstruction, derive an approximate epipolar plane image that associated planar sweeping camera setup, use one-dimensional window efficient matching. address aperture problem introduced matching, keep...
In this paper, the late time stability is studied for marching on-in-time scheme in domain integral equation. First, numerical evaluation of convolution between retarded potential and basis function employed to ensure accuracy. Then, we solve first few steps' current coefficients as eigenvectors derive remaining coefficients. By projecting system onto a modal order reduced system, can be still ensured. Numerical results show that accuracy solutions obtained with proposed methods MOT-TD-CFIE...
The objective of this paper is to identify a synchronous generator's internal voltage, d <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">q</sub> -axis reactances using Phasor Measurement Unit (PMU) data obtained at the terminal bus generator. Our approach firstly classify PMU into inputs and outputs then relationship between outputs. With different classifications assumptions on salience, we obtain three estimation models. expressed by...
In order to effectively improve energy efficiency, integrated system has recently become an important form of utilization. Multi-load forecasting with superior performance is very the planning and operation power grid planning. Considering coupling sources randomness uncertainty load in system, a short-term multi-load interval method for based on Multi-task learning proposed this paper. Firstly, multi-task adopted establish close relationship between multiple sources. Secondly, RELM...
Based on the ABAQUS/Standard product, strength reduction finite element method (SRFEM) is used to tell slope factor of safety with Mohr-coulomb plasticity model. And corresponding parameters varying field variable values are set make SRFEM possible in ABAQUS/Standard. soil equivalent plastic strain (PEEQ) adopted failure. The results show that ABAQUS accurate, versatile and less assumption comparison against traditional limit equilibrium methods, which can give deformation stresses special...