A5102448018- Power Systems and Renewable Energy
- Advanced DC-DC Converters
- Lightning and Electromagnetic Phenomena
- High voltage insulation and dielectric phenomena
- Smart Grid and Power Systems
- Smart Grid Energy Management
- Thermal Analysis in Power Transmission
- Advanced Photonic Communication Systems
- Power Systems and Technologies
- Microgrid Control and Optimization
- Advanced Sensor and Control Systems
- High-Voltage Power Transmission Systems
- Optical Network Technologies
- Advanced Computational Techniques and Applications
- Multilevel Inverters and Converters
- Optimal Power Flow Distribution
- Pulsed Power Technology Applications
- Plasma Diagnostics and Applications
- Elevator Systems and Control
- Maritime Transport Emissions and Efficiency
- Cloud Data Security Solutions
- RFID technology advancements
- Electric Power System Optimization
- Power System Reliability and Maintenance
- Titanium Alloys Microstructure and Properties
Hohai University
2025
Zhejiang University of Technology
2024
Shanghai Electric (China)
2015-2024
Xi'an Jiaotong University
2018-2024
Shenyang Ligong University
2023
China National Petroleum Corporation (China)
2020
Massachusetts Institute of Technology
2019
Southeast University
2018
Nanjing University of Aeronautics and Astronautics
2017
Beijing Jiaotong University
2015
Industrial pure titanium was processed through 1–4 passes by equal-channel angular pressing (ECAP), and the samples were subsequently short-term annealed for 15 min at 300 °C, to achieve better mechanical properties industrial applications. The microstructure analyzed using TEM, EBSD, XRD observations. studied tensile testing. TEM EBSD results showed that grain size of refined approximately 420 nm after four ECAP processing, with very little growth annealing. analysis proved enhanced basal...
In this article, the influence of polishing orientation on surface charge accumulation and flashover characteristics basin spacer in a downsized dc-gas insulated transmission line (GIL) are explored by experiments. Results show that distribution polished spacers is different from untreated one. Heteropolar charges can be observed area outward expansion under prestressing condition. The voltages all decreased. radial (RP) has greatest impact voltage, voltage radially decreased 11% positive...
We propose an efficient channel estimation method for coherent optical orthogonal frequency-division multiplexing (CO-OFDM) based on weighted inter-frame averaging (WIFA), in which the results of adjacent frames are averaged to increase accuracy. The principle proposed WIFA is theoretically analyzed, and benefit demonstrated by a polarization-division-multiplexed CO-OFDM transmission experiment. magnitude phase differences among investigated. effectiveness method, combined with conventional...
Millimeter-wave (mm-wave) communication systems can provide significantly higher throughput thanks to its larger bandwidth. However, due the hardware cost and power consumptions, hybrid analog/digital implementation tends be more practical than conventional full-digital one. In this paper, we propose a novel multiuser precoding design for orthogonal frequency-division multiplexing (OFDM)-based broadband mm-wave with fully connected structure partial channel state information (CSI)....
In this paper, SiC/epoxy resin composites containing different amounts of micro-sized SiC with crystal morphologies were fabricated to study the effects morphology and temperature on non-linear conductivity characteristics. The research results illustrate that β-SiC particles can provide a higher conductivity, compared α-SiC particles. presence also affected behaviors epoxy/SiC composites. When content was low, coefficient increased rapidly as increased, but decreased slightly when filler...
Aiming at the problems of slow convergence speed and low tracking accuracy in attitude control position quadrotor unmanned aerial vehicles (UAVs). This paper combines fractional-order calculus theory with backstepping sliding mode algorithm, using to compensate for nonlinearity system eliminate jitter brought about by control, proposes a new strategy trajectory UAV. The proposed surface increases flexibility improves robustness anti-interference ability some extent. stability analysis is...
This paper presents the design of a two-stage 50W portable charger architecture with universal ac input and 5V/25W, 9V/45W, 12V/50W output. A 98.5% efficient valley-switched boost converter operating at 0.5-2MHz enables 47% reduction in buffer capacitor volume while stacked-bridge LLC Variable-Inverter-Rectifier-Transformer (VIRT) offers greater than 96% efficiency across wide output voltage range. The demonstrates potential trade-offs this power.
Power grid analysis is a challenging problem for modern integrated circuits. For 3-D systems fabricated using stacked tiers with TSVs, traditional power methods planar (2-D) circuits do not demonstrate the same performance. An efficient IR drop method large-scale circuits, called voltage propagation method, proposed in this paper. This compared another widely used preconditioned conjugated gradients. Simulation results that more of large size grids. Speedups between 10× to 20× over gradients...
Photovoltaic power generation is random and fluctuating, large-scale PV access can cause problems such as bi-directional currents in the distribution network voltage violation at nodes. This paper focuses on cluster division method regulation strategy for distributed reactive optimization networks containing high penetration photovoltaics (PV). Firstly, electrical distance calculated with sensitivity used metric K-means clustering algorithm to complete of network; Then, MOJAYA proposed be...
The key state information index and sensing scheme of distribution substation are established, a software hardware is designed developed for the monitoring safety warning system power substation. This new can greatly improve intelligent automatic level substation, which has advantages simple operation, powerful function low cost, great practical value.
Low-voltage distribution network because of its single-phase load quantity, strong randomness and other characteristics, lead to three-phase imbalance phenomenon for a long time, with the distributed generation high proportion access, problem further aggravated, so this paper proposes low-voltage station area control strategy, first through MATLAB simulation balance two states, gives phase conversion system implementation scheme. Then, multi-objective optimization model minimum number...
We propose an efficient channel estimation method based on weighted inter-frame averaging for CO-OFDM system. Up to 2.4 dB error vector magnitude improvement compared with traditional methods is shown by a PDM-16QAM experiment.
In order to meet the requirement of pulsed power source on high voltage and large current switches，a series-connected thyristor switch with a rated 10 kV 500 A was developed traditional sharing method. According principle trigger, trigger system for synchronous triggering multiple thyristors. As generate low-voltage pulse variable widths, used an IGBT cut DC voltage. system, amplitude increased signals were generated through some isolated transformers. Finally, tested, Showing that could...
An isolated grid-connected photovoltaic (PV) power system for household is proposed and the control strategy of presented in this paper. The PV employs an interleaved boost converter as first power-processing stage, which can a low voltage array up to high dc-bus voltage. In traditional system, industrial low-frequency transformers are often used electrical isolation. However, with shortage large volume, great weight noise, it not suitable application. paper, dual active bridge (DAB) second...
With the continuous improvement of substation voltage level and wide use GAS insulated SWITCHGEAR (GIS), switching overvoltage, especially very fast transient overvoltage (VFTO) caused by disconnector operation, has attracted more attention. According to demonstration project a new generation intelligent with highest grade (330kV) in operation China, analysing physical process VFTO propagation high combining simulation calculation test detection. Taking electronic current transformer...
This paper analyzes the influence of load impedance on efficiency photovoltaic conversion, builds solar semiconductor experimental device for testing, verifies influencing factors efficiency, and proposes optimization strategy based boost circuit. At same time, through qualitative analysis series parallel structure system refrigeration, effective measures to improve refrigeration are obtained.
Along with the advancement of double carbon targets, a large number non-uniform distributed photovoltaic power generation access to distribution network, lead original grid caused by load in three-phase unbalance, it makes normal operation network worse. The unbalanced due neglect treatment penetration for unbalance led influence governance effect is not good. In this paper, real-time balance model considering permeability proposed, which aims at minimizing sum three phase degrees and...