A5101822114- Microgrid Control and Optimization
- Islanding Detection in Power Systems
- Power Systems and Renewable Energy
- Vibration Control and Rheological Fluids
- Photonic and Optical Devices
- HVDC Systems and Fault Protection
- High-Voltage Power Transmission Systems
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Optic Sensors
- Vibration and Dynamic Analysis
- Fractional Differential Equations Solutions
- Methane Hydrates and Related Phenomena
- Laser-Matter Interactions and Applications
- Bladed Disk Vibration Dynamics
- Magnetic Bearings and Levitation Dynamics
- Mechanical Engineering and Vibrations Research
- Numerical methods in engineering
- Photopolymerization techniques and applications
- Composite Structure Analysis and Optimization
- Manufacturing Process and Optimization
- Advanced Fiber Laser Technologies
- Phase Equilibria and Thermodynamics
- Additive Manufacturing and 3D Printing Technologies
- Vehicle Dynamics and Control Systems
- Power System Optimization and Stability
Wuhan University
2021-2025
Shijiazhuang Tiedao University
2021-2022
Donghua University
2016
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
2016
University of Maryland, College Park
1998-2002
With the increasing penetration of renewable energy generators, stability issues grid-tied converter systems become much more important. However, due to high nonlinearity and varying damping systems, conventional transient analysis methods are not applicable, which may bring conservativeness or misjudgment on assessment. In this paper, with is investigated provide boundary estimation. Firstly, considering frequency mutation phase-locked loop (PLL) caused by various perturbations, a modified...
With the rapid development of distributed renewable energy generation and integration, stability issues power converters systems have been widely studied in recent years. Many previous studies focus on transient a single converter connected to weak grid. However, nonlinear dynamics mechanism multiple remain unclear. In this article, unified model paralleled-converters system is established, which reveals interactive damping among To analyze impacts terms stability, dual-iterative equal area...
With the continuous increase of global wind power installed capacity, modern system gradually shows characteristics weak damping, low inertia, and anti-interference ability. Aiming at normal grid-connected tur-bine under grid conditions, small signal stability flux-controlled grid-forming DFIG is analysed. Firstly, small-signal model constructed based on virtual synchronous generator control (VSG). Then, eigenvalue analysis method used to investigate influence different operating conditions...
ABSTRACT This paper was to assess the effects of styrene–acrylonitrile (SAN) contents on glass transition temperature ( T g ), melt flow index (MFI), and mechanical properties acrylonitrile–butadiene–styrene (ABS)/SAN blends for fused deposition modeling (FDM) process. The addition SAN had little but could decrease MFI elongation at break while improving tensile strength modulus ABS/SAN blends. For both longitudinal direction transverse FDM printed specimens, incorporation improved without...
The nonlocal piezoelectric theory and first-order shear deformation are combined to study the nano-scale effect on free vibration of a laminated functionally graded curved nano-beam covered with layers. is introduced consider rotary inertia effects resulting from torsional flexural deformations. effective elastic properties nano-layers estimated by using Cox model. governing equations derived employing Hamilton's principle, efficient differential quadrature method used solve discretized...
Transient stability issues of power converter systems have attracted much attention. Generally, the are high-order nonlinear due to multiple cascaded control loops, which become obstacles for transient analysis. However, many conventional methods, including well-known Equal Area Criterion, only applicable second-order without considering damping effects. To fill this gap, an iterative Criterion is proposed handle higher-order systems. Considering dynamic coupling between active and reactive...
We have studied both theoretically and experimentally the detuned-loading effect of a fiber grating semiconductor laser. This is observed with laser constructed single-angled facet diode conically lensed grating. Operation such demonstrated at 2.5 Gb/s good eye diagrams are obtained.
The forced vibration of a single-degree-of-freedom piecewise linear system containing fractional time-delay feedback was investigated. approximate analytical solution the obtained by employing an averaging method. A frequency response equation time delay studying steady-state solution. stability conditions solution, amplitude–frequency results, and numerical solutions under different parameters were compared. Comparison results indicated favorable goodness fit between two revealed...
Stability issue of grid-tied power converters has become a tough obstacle for the integration large-scale renewable energy. In recent years, novel control approach called virtual synchronous generator (VSG) been widely investigated to improve dynamic response and inertia support. However, how guarantee transient stability VSG under large-signal perturbations not fully considered, which results in difficulties parameters selection VSG. this paper, an analytical criterion is proposed VSG,...
Vehicle suspension systems generally have non-smooth factors, such as clearances, collision, and constraint. The bad dynamic behaviors caused by these factors not been controlled effectively, thus influencing the driving performance riding comfort of vehicles. To explore characteristics for controlling behaviors, an approximate analytical solution to response a two-degree freedom nonlinear system, which has fractional-order displacement feedback under harmonic excitation, was deduced...
Fiber Bragg grating semiconductor lasers (FGSLs) are interesting laser sources for WDM and many other applications. Dispersive fiber together with a diode chip form complex cavity can lead to phenomena. We have found that discrete mode hop associated an increase of the injection current decrease relaxation oscillation frequency. The experimental observation theoretical explanation reported in this paper.