A5085494067- HVDC Systems and Fault Protection
- Power Systems Fault Detection
- Islanding Detection in Power Systems
- Microgrid Control and Optimization
- Solar-Powered Water Purification Methods
- Advanced Cellulose Research Studies
- Electromagnetic wave absorption materials
- Electromagnetic Simulation and Numerical Methods
- Multilevel Inverters and Converters
- Heat Transfer and Optimization
- Power Transformer Diagnostics and Insulation
- Power Line Communications and Noise
- High-Voltage Power Transmission Systems
- Advanced Sensor and Energy Harvesting Materials
- Solar Thermal and Photovoltaic Systems
- Underwater Vehicles and Communication Systems
- Membrane Separation Technologies
- Smart Grid Security and Resilience
- Power System Optimization and Stability
ShanghaiTech University
2022-2025
Zhejiang University
2024
<title>Abstract</title> In the present study, a novel technology called intermittent solvent-free microwave extraction (ISFME), which integrates treatment with extraction, was proposed. Taking Nanfeng citrus peel as research object, efficiency and composition of its essential oil were evaluated compared conventional hydrodistillation (HD) (SFME). Results from single-factor experiments response surface method optimization indicate that optimal parameters for SFME are power 660 W, duration 20...
This article proposes a fast and sensitive current differential protection (CDP) for modular multilevel converter based high voltage direct lines. method utilizes the fully distributed frequency dependent (FD) line model to compensate influence of FD parameters, thus achieving sensitivity. The improved curve fitting scheme in is provided enable formulation current. Then, time domain convolution specially designed achieve capability real-time calculation with model, therefore guarantee...
The manufacturing of a flexible, durable, large-area, and multifunctional textile material in straightforward cost-effective manner remains significant challenge. In this work, we propose stable Ag nanowire (Ag NW)-containing nanocomposite paint using cellulose nanofibril (CNF) as dispersant stabilizer for fabric coating on different substrates, including commercial cotton, polyacrylonitrile, polyphenylene sulfide, polyester, polyurethane fabrics. Air plasma treatment applied to the fabrics...
This paper proposes an unsynchronized two-terminal fault location method on three phase practically transposed transmission lines. Compared to the existing methods, proposed considers asymmetry of lines during in practice. First, constructs by connecting untransposed line sections. For each section, fully distributed parameters model is adopted ensure modeling accuracy. According physical laws that should obey, angle estimated with analytical formulation before fault. Next, closed-form...
With more renewable energy integrated to the grid in form of inverter based resources (IBRs), traditional current-based fault phase selector encounters limitations. The causes this problem are weak infeed feature and variation source impedance IBRs. This paper proposes an improved selection scheme solve problem. Firstly, reasons for failure methods analyzed. Then, compound proportion criterion including voltages currents is established. proposed mitigates effects weak-infeed caused by...
As renewables are increasingly connected to the grid through inverters, inverter based resources (IBRs) affect performance of line distance protection and cause mal-operation relays. This paper proposes an improved scheme on dynamic trip region. The key idea is adjust region relay in real time ensure proper operation First, limitation traditional presented. Second, with different fault types, locations resistances, expression apparent impedance derived as functions measured...
In this paper, a new parameter estimation method with magnitude measurements of voltages and currents is proposed for the power network. Compared to existing that uses PMUs estimate line parameters network, introduces entries admittance matrix phase angles voltage current injection as unknown states be estimated. The also considers load step in formulation. Afterwards, Newton's utilized solve nonlinear optimization problem. Numerical experiments WSCC 9-bus system demonstrate accurate...
Multi-terminal hybrid transmission lines including overhead and cables are adopted to connect off-shore wind farms the power grid. This paper proposes a protection method for multi-terminal through dynamic states estimation. The accurately considers shunt capacitance line cable. Firstly, model of is established, where distributed parameter modeled by multiple $\pi$ sections. All physical laws listed differential algebraic equations (DAEs) in matrix forms. Secondly, principle estimation (DSE)...
Synchronized measurements within a power network are of great importance to enable extensive applications such as monitoring, operation, protection, fault location, and controls. However, measurement synchronization through satellite is not always available in practical systems. To this end, paper proposed virtual technique for terminals transmission lines, without the requirement line parameters. Unsynchronized voltage current at two-terminals required. The key idea describe physical laws...