A5101547211- Vacuum and Plasma Arcs
- HVDC Systems and Fault Protection
- Electrical Fault Detection and Protection
- Power System Reliability and Maintenance
- Gear and Bearing Dynamics Analysis
- Electrical Contact Performance and Analysis
- Machine Fault Diagnosis Techniques
- Advanced DC-DC Converters
- Multilevel Inverters and Converters
- Religion and Society Interactions
- Thermal Analysis in Power Transmission
- Religion, Society, and Development
- Metallurgy and Material Forming
- Engineering Diagnostics and Reliability
Hubei University of Automotive Technology
2024-2025
State Grid Corporation of China (China)
2018-2023
Tsinghua University
2014-2017
As the degree of power enhancement in internal combustion engines increases, face significantly greater mechanical and thermal loads, presenting more challenges to noise, vibration, harshness (NVH) performance reliability entire machine. Effective NVH control requires accurate identification analysis vibration noise sources, a prerequisite for accurately identifying these sources is conducting thorough fault detection related components. With help LabVIEW software, system empirical mode...
The no-load curve of the dielectric recovery strength ultra-fast mechanical vacuum switch (MVS) changing with time is theoretical foundation to optimize turn-off strategy hybrid direct current circuit breaker load commutation switch. To avoid shortcomings classic synthetic circuit, a novel test proposed measure MVS in this paper. In succession pulse voltages automatically applied on MVS, and multiple breakdowns occur one test. Therefore, at points obtained, envelope voltage during can...
Dynamic contact resistance measurement (DRM) is an effective technique for assessing the condition of power circuit breaker main contacts and arcing contacts. However, DRMs are easily affected by condition, they vary widely with changes which likely to lead misjudgments. The problem can be relieved increasing injected current value. proposed paper researched influence dc on dynamic resistance, discovered that average standard deviation DRM curve decreased increase in At same time,...
To solve the stability problem of large-scale offshore wind power integration and transmission, this paper proposed a topology distributed medium voltage DC collection high transmission. The has three series boosters. first stage booster is realized through direct connection turbine generators, second Modular Multilevel Direct-current Converter (MMDC), third side ports MMDC. method its system characteristics are introduced. typical control strategy MMDC analyzed, providing support for...
Dynamic contact resistance measurement (DRM) is an effective technique to evaluate the condition in substations without dismantling circuit breakers. However, performing DRM tests with unsuitable test parameters will cause low repeatability of results, and even lead misdiagnosis condition. Performing at high DC injected current can improve repeatability. This paper studies mechanism on it also promotes a new determination method amplitude. The impact results reviewed. investigated by...
With the wide application of HVDC transmission in large-scale and far-reaching offshore wind farms, selection schemes AC collection-DC DC has become a research hot spot field power. The all-DC collection system will an important mode due to its superior controllability. However, for lacking engineering experience, how choose economic reliable topology are crucial applications. This paper compares analyzes advantages disadvantages series-parallel boost topology, establishes design evaluation...
Real-world vibration signal acquisition of automotive machines often results in imbalanced sample sets due to restricted test conditions, adversely impacting fault diagnostic accuracy. To address this problem, we propose fractional diversity entropy (FrDivEn) and incorporate it into the classifier-guided diffusion model (CGDM) synthesize high-quality samples. Additionally, present a corresponding method. This method first converts data Gramian angular field (GAF) image samples through GAF...
Far-offshore has a wider sea area, larger wind energy reserves and higher quality resources, which is an important direction for the future development of power. However, with increasing capacity area far-offshore farms, technical economic problems power transmission are becoming more prominent there urgent need in-depth analysis cost various schemes. Thus, this paper compiles typical schemes modular multilevel converter-based high voltage direct current (MMC-HVDC) transmission,...
The discussion of the offensive religious conflict in this paper emphasizes on fact that those regional groups are only because their dissatisfaction with status quo and ability resorting to force. purpose provoking is pursuit absolute security as well maximized benefit fighting for survival space. And ultimate goal defensive whether or not maintain a relatively safe independent development own state. concern about intentions, abilities consequences confrontation attempt transform...