A5054920864- HVDC Systems and Fault Protection
- Multilevel Inverters and Converters
- Radio Frequency Integrated Circuit Design
- High-Voltage Power Transmission Systems
- Advancements in PLL and VCO Technologies
- Advanced DC-DC Converters
- Power Systems and Renewable Energy
- Sensorless Control of Electric Motors
- Electric Motor Design and Analysis
- Microgrid Control and Optimization
- Silicon Carbide Semiconductor Technologies
- Microwave Engineering and Waveguides
- Advanced Wireless Communication Techniques
- PAPR reduction in OFDM
- Semiconductor Lasers and Optical Devices
- Power Line Communications and Noise
- Magnetic Bearings and Levitation Dynamics
- Advanced Power Amplifier Design
- Machine Fault Diagnosis Techniques
- Flow Measurement and Analysis
- Magnetic Properties and Applications
- Fault Detection and Control Systems
- Analog and Mixed-Signal Circuit Design
- Remote-Sensing Image Classification
- Semiconductor materials and devices
China Southern Power Grid (China)
2020-2025
Xidian University
2014-2025
Beijing Institute of Technology
2024
Xihua University
2024
Shenyang University of Technology
2020-2023
First Hospital of China Medical University
2021
China Medical University
2021
Beijing University of Posts and Telecommunications
2016
Nankai University
2008
Chinese Academy of Sciences
2007
Robustness and accuracy are the two main challenging problems in feature-based remote sensing image registration. In this letter, a novel point-matching algorithm is proposed. An improved random sample consensus (RANSAC) called fast (FSC) It divides data set RANSAC into parts: set. Sample has high correct rate large number of matches. iterative method put forward to increase correspondences. A measures been used evaluate registration result. The performance proposed validated on evaluation...
This paper investigates a hydrogen production power supply topology based on current source rectifiers for the application scenario of high-power system. The system equations in dq coordinate are established, and decoupled inner-loop control method is examined. Additionally, it provides an overall scheme equalization multiple connected parallel. analyses effects different positions rectifier damping resistor resonance suppression grid-side LC filter. It suggests passive configuration....
This paper proposes a method to diagnose the open-circuit faulty phases and points of six-phase permanent magnet synchronous motor (PMSM) drive circuit. The current sensor is used obtain signal, least mean square error (LMS) adaptive filtering algorithm filter out vibration noise. Empirical Mode Decomposition (EMD) performed on filtered signals, EMD energy entropy each phase signal calculated. change can simplify double-bridge arm fault single-bridge fault, which reduces number...
This paper proposes a novel control approach for fault-tolerant of dual three-phase permanent magnet synchronous motor (PMSM) under one-phase open-circuit fault. A modified six-phase static coordinate transformation matrix and an extended rotating are investigated considering the influence fifth harmonic space on control. These mathematical models further analyzed in fundamental after fault to eliminate coupling between d-q axis voltage equation wave space, secondary rotation is proposed. To...
Evaluation of potential benefits is the key issue to set up suitable business model and pricing strategy for demand response. In view severe energy environmental issues, low carbon development inevitable as well. this paper a demonstration project smart distribution grid in Jiangxi province China introduced. The mechanism response analyzed. Then framework proposed identify corresponding low-carbon effects network specific evaluation method has been established quantify total grid. Moreover...
The AC copper loss of flat wire in axial flux permanent magnet (AFPM) motor can seriously affect the performance, so it cannot be ignored when optimizing design. Accurate results obtained using three-dimensional transient field finite element (FE) to calculate loss. However, calculation time is long, which not conducive optimization In order consider effects external magnetic field, conductor arrangement mode, stator tooth-tip, skin effect, and proximity effect on balance accuracy time,...
In order to solve the problem of difficult design weighting factor for model predictive torque control (MPTC) dual three-phase permanent magnet synchronous motor (DT-PMSM), this paper proposes a MPTC strategy without factor. Firstly, virtual voltage vector (V <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> ) is introduced reduce harmonic currents. Secondly, an approximate alternative principle predicted current proposed, which simplifies...
Aiming at the occasion of DC transmission offshore wind power, a new type hybrid converter topology is proposed in which diode rectifier connected parallel with AC side MMC and series. provides stable voltage source for farms serves as power black start. The has bypass circuit breaker thyristor starting circuit. Due to application higher integration lower operating this topology, HVDC system density cost, some certain utilities. This paper analyzes principle converter, distribution ratio,...
In this paper, to compensate frequency offset and phase noise influence, several ICI self-cancellation methods are proposed, CPE, CIR derived in MISO OFDM system. As results, by choosing appropriately, considerable performance improvement can be achieved the system which affected noise.
This study proposes a diagnosis method for open-circuit faults of six-phase permanent magnet synchronous motor. When the fault occurs in single-bridge arm or double-bridge arm, wavelet transform extracts trigger signal fault, and z 1 –z 2 plane current component is analysed. Seven kinds modes are defined by analysing characteristics scatter plot component. The fractal dimension calculated to accurately quantify modes. Moreover, 13 areas centroid position First, two particular completed...
This paper realized a charge pump phase locked loop (CPPLL) frequency source circuit based on 0.15 μm Win GaAs pHEMT process. In this paper, an improved fully differential edge-triggered discriminator (PFD) and structure (CP) are proposed respectively. addition, low noise voltage-controlled oscillator (VCO) static 64:1 divider is realized. Finally, the (PLL) by cascading each module. Measurement results show that output signal of CPPLL 3.584 GHz–4.021 GHz, at offset 1 MHz −117.82 dBc/Hz,...
A fully integrated CMOS VCO which has low temperature and power supply sensitivity been implemented in a 0.25 /spl mu/m 4-metal 1-poly process. The causes of oscillation frequency drift over have investigated. By adjusting the reverse biasing voltage junction diodes back-side linearized MOS varactors, less than 10 ppm//spl deg/C achieved at 1.7 GHz. Phase noise 900 kHz offset is -134 dBc/Hz varies 1 dBc -30/spl sim/+90/spl deg/C.
The extensive utilization of social networks presented an opportunity for detecting depression in a timely and cost-effective manner. In that paper, we proposed TUNDD, detection method based on text user network, which leveraged network data. TUNDD comprised three modules: the embedding module utilized BERT to encode post text, graph perception applied GAT explore potential relationships among users, classification combined vectors, transforming them into higher-dimensional vectors through...