A5061983567- Electric Motor Design and Analysis
- Microgrid Control and Optimization
- Wave and Wind Energy Systems
- Magnetic Bearings and Levitation Dynamics
- Frequency Control in Power Systems
- Wind Turbine Control Systems
- Sensorless Control of Electric Motors
- HVDC Systems and Fault Protection
- Islanding Detection in Power Systems
- Power Systems and Renewable Energy
- Luminescence Properties of Advanced Materials
- Advanced Condensed Matter Physics
- Topological Materials and Phenomena
- Gas Sensing Nanomaterials and Sensors
- Multilevel Inverters and Converters
- Adaptive Control of Nonlinear Systems
- Hybrid Renewable Energy Systems
- Fluid Dynamics and Vibration Analysis
- Induction Heating and Inverter Technology
- Adaptive Dynamic Programming Control
- Wind Energy Research and Development
- Advanced Sensor and Control Systems
- Advanced Battery Technologies Research
- Advanced Algorithms and Applications
- Microwave Dielectric Ceramics Synthesis
Tianjin University
2015-2024
ShanghaiTech University
2021-2023
University of Chinese Academy of Sciences
2023
Sichuan University
2018-2021
Daqing Oilfield General Hospital
2018
Chengdu University of Information Technology
2018
Tiangong University
2011-2017
University of Science and Technology of China
2010-2017
Hefei University
2016-2017
Academia Sinica
2017
Since different incident waves will cause the same array to perform differently with respect wave energy converter (WEC), parameters of wave, including angle and number, are taken into account for optimizing array. Then, differential evolution (DE) algorithm, which has advantages simple operation procedures a strong global search ability, is used optimize However, traditional algorithm cannot satisfy convergence precision speed simultaneously. In order make optimization results more...
In this article, a mathematical model of magnetic-wheeled mobile robot (MWMR) used for wall climbing in some special industrial sites is established, and to realize the precise motion control robot, an intelligent discrete algorithm trajectory tracking MWMR presented. The subjected nonholonomic constraints when moving on wall. established with description kinematics dynamics, where dynamics are described by second-order Lagrange's equations. Improved dual-heuristic dynamic programming (DHP)...
The frequent start/stop operation of a bow thruster presents high pulsating power demand in shipboard microgrids while reducing the fuel efficiency diesel engines, which may induce potential instabilities. In this article, hybrid energy storage system, including batteries and ultracapacitors (UCs), is connected to dc bus driver, hierarchical controller proposed for bidirectional dc/dc converters that interface storages, thus providing following functions: 1) generator (DG) sets provide...
Abstract The nature of the interaction between magnetism and topology in magnetic topological semimetals remains mysterious, but may be expected to lead a variety novel physics. We systematically studied semimetal EuAs 3 , demonstrating magnetism-induced transition from nodal-line paramagnetic or spin-polarized state massive Dirac metal antiferromagnetic ground at low temperature. has been verified by electrical transport measurements. An unsaturated extremely large magnetoresistance ~2 × 10...
This paper puts forward a novel design method of permanent magnet synchronous generator (PMSG). The most significant advantage this is that the output power PMSG can be prominently improved without increasing any material costs. main difference from traditional scheme volume (PM) remains unchanged during entire procedure. And maximum found out just by optimizing PM's shapes with change mechanical pole-arc coefficient. In other words, aims to obtain PM utilization produce more "effective"...
A new sensing mechanism is presented and a high relative sensitivity achieved in our sample YPO<sub>4</sub>:3.2%Tb<sup>3+</sup>,0.8%Ho<sup>3+</sup>.
The integration of dc power distributed systems in modern shipboard microgrids is receiving much attention recently due to their high efficiency and grid connection flexibility. These (dc-SMGs) are characterized by having different operating modes large proportion electric propulsion, some which involves severe dynamic/transient conditions. Considering various operation actual ships, this paper proposes a hierarchical coordinated control, includes primary control level (PCL) management...
The relative temperature sensitivity of LiLa(MoO<sub>4</sub>)<sub>2</sub>:Tm<sup>3+</sup>/Yb<sup>3+</sup> based on two different UC emissions Tm<sup>3+</sup> is superior to previously reported results.
Abstract Impacts of P-f & Q-V droop control on MicroGrid transient stability was investigated with a wind unit asynchronous generator in the MicroGrid. The system frequency explored when motor load starts and its power changes, faults different types locations occurs. simulations were done by PSCAD/EMTDC.
The dynamic model for a bidirectional driven float-type wave power generation system design is presented in this paper. gravity, buoyancy and drag force acting on the energy converter (WEC) are all analyzed. analytical expression of torque applied rotor given based linear switched reluctance generator (SRG). SRG usually rotates with low velocity WEC system. In situation, current chopping control (CCC) adopted fixed turn-on angle turn-off mode to have quick response SRG. Further, order make...
A fuzzy neural network (FNN) based inter-turn short circuit fault detection scheme for generator is proposed. The second harmonic magnitude of field current and the negative sequence components voltages currents are used as inputs FNN detector. voltage obtained from phase using symmetrical component analysis method. And achieved by FFT technique. detector with Gauss membership functions trained off-line training data which comes Multi-Loop simulation program. proposed can perform detection,...
With the wave energy conversion system (WECS) integrated to grid, lack of satisfactory ability ride through transient voltage faults will reduce stability and reliability grid. In this article, in order enhance low-voltage ride-through (LVRT) capability WECS, structure mathematical model a magnetic-gear permanent magnet synchronous generator (MG_PMSG) float-type converter are introduced first. The output power characteristic WECS is analyzed. Then, novel coordinative LVRT control scheme...
In general, adjusting the composition of a fluorescent material is an effective way to tune its luminescent properties such as peak energy and bandwidth. most solid-solutions, emission shifts linearly with materials' composition, which referred Vegard's Law. However, we found extraordinary variations in our samples Ba2xSr2-2xV2O7, that is, both excitation peaks show nonlinear dependence on x, same true for spectral bandwidths. The nonlinearities are not due structural anomaly, all confirmed...
Ga N ∕ Al x 1 − superlattices (SLs) with different period thicknesses tp were grown as interlayers between GaN and AlyGa1−yN epilayers. The effect of threading dislocations (TDs) blocking became more evident increasing tp. Transmission electron microscopy analysis shows that TDs are inclined to be bended in SLs terminated wells a result strain. X-ray diffraction measurement also validated played important role filter. resulted an abnormal decrease relaxation factors R(SLs)
This paper develops a supervisory control and data acquisition (SCADA) system to monitor an islanded DC microgrid including wind turbine, photovoltaics, battery units. The SCADA is based on KingView 6.55, establishes communication between the host slave computers through intelligent modules different techniques. developed can real-time parameters such as voltages, currents, or powers, store important into database. Users get historical realistically effectively SQL access. When some values...
The emerging global wave energy industry has great potential to contribute the world’s needs. However, one of key challenges in designing a converter (WEC) is generator. Thus, this paper focuses on optimal design cylindrical permanent magnet linear generator (CPMLG), which used for conversion system. To reduce end effect and enhance magnetic field performance CPMLG, level-set method applied topology size In paper, objective air gap given by mathematical analysis appropriate measuring points...
A coupled field-circuit method by taking into account the saturation is proposed in this paper. The stator winding inter-turn short circuit and rotor eccentricity hybrid fault of permanent magnet synchronous generators (PMSG) analyzed. harmonic currents were used order to investigate kind a 7.5 kVA PMSG suitable for low-power wind generation applications. Simulation results have shown that sideband frequency at 25 Hz 75 Hz, 17 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
The Weyl semiconductor is a type of material that exhibits unique electronic properties. Tellurium (Te) recently discovered quantum quasilinear dispersion, as opposed to the linear dispersion commonly observed in conventional semimetals. Its electrical- and magnetotransport properties, especially Te crystals with different Fermi energy, have not been thoroughly investigated prior studies. Here we successfully grew series varied energy through temperature-cooling rates self-flux method, whose...
The brushless DC motor (BLDCM) is a multi-variable and non-linear system. Fuzzy control has been widely used in the field of BLDCM control. However, design tuning fuzzy controller are not satisfactory. In this paper, an auto-tuning method for logic based on ant colony optimization (ACO) algorithm presented, applied to BLDCM. operating system includes current loop speed loop. uses whose rules optimized off-line parameters adjusted on-line ACO. At last, digital signal processor (DSP) fully...
Wave energy is a large-volume renewable, clean and pollution-free new source, which of great significance in solving crisis environmental degradation. Based on the similarity principle between mechanical electrical system, equivalent circuit model heave-surge double-degree-of-freedom wave converter (DDOF-WEC) established by using analogue method this paper. The sufficient condition system stability analyzed Routh–Hurwitz criterion. It verified that DDOF-WEC has higher capture capability than...