A5033299323- HVDC Systems and Fault Protection
- High-Voltage Power Transmission Systems
- Microgrid Control and Optimization
- Frequency Control in Power Systems
- Silicon Carbide Semiconductor Technologies
- Power System Optimization and Stability
- Power Systems and Renewable Energy
- Cardiac Structural Anomalies and Repair
- Superconductivity in MgB2 and Alloys
- Smart Grid and Power Systems
- Cancer Research and Treatments
- Superconducting Materials and Applications
- RNA modifications and cancer
- Power System Reliability and Maintenance
- Wind Turbine Control Systems
- Mycobacterium research and diagnosis
- Dielectric materials and actuators
- Energy Load and Power Forecasting
- Advanced DC-DC Converters
- High voltage insulation and dielectric phenomena
- Islanding Detection in Power Systems
- Cancer-related molecular mechanisms research
- Gastric Cancer Management and Outcomes
- Electric Power System Optimization
- Power Systems Fault Detection
South China University of Technology
2009-2025
PowerChina (China)
2025
North China Electric Power University
2024
University of Tennessee at Knoxville
2019-2022
Chongqing University of Posts and Telecommunications
2022
Oak Ridge National Laboratory
2021
Central South University
2021
Guangzhou Medical University
2007-2020
Guangzhou First People's Hospital
2007-2020
Zhejiang University
2002-2020
Abstract Background Accurate and robust pathological image analysis for colorectal cancer (CRC) diagnosis is time-consuming knowledge-intensive, but essential CRC patients’ treatment. The current heavy workload of pathologists in clinics/hospitals may easily lead to unconscious misdiagnosis based on daily analyses. Methods Based a state-of-the-art transfer-learned deep convolutional neural network artificial intelligence (AI), we proposed novel patch aggregation strategy clinic using weakly...
This letter presents a grid-forming control with adaptive grid-synchronization capability for voltage source converters (VSCs). The proposed has both phase-locked loop (PLL) and power synchronization (PSL), which makes it exhibit hybrid features. In addition, the VSC's performance can be dynamically optimized by adaptively adjusting PLL-PSL weighting coefficient. Theoretical simulation analyses are performed to verify effectiveness of control.
The modular multilevel converter (MMC) is widely used in high and medium voltage applications. To improve the reliability of MMC, fast accurate submodule (SM) fault detection, location, tolerant control are required to avoid interrupted power transmission. Existing methods do not consider all characteristics SM different operation modes when MMC adopts nearest level modulation. This paper proposes a robust management scheme that enables uninterrupted with modulation under fault. presented....
The modular multilevel converter (MMC) will be used in power systems more and widely. main circuit parameter design of the MMC impacts initial investment operating performance system. In this study problem several important elements MMC, such as link transformer, arm reactor, sub‐module (SM) capacitor SM electronic devices are analysed. Based on fundamental equivalent method for rated valve side no‐load voltage transformer is proposed; variation range determined (1.00–1.05)/2 times DC...
Urban power grids are facing many operational and expansion challenges to meet further demand growth increased reliability requirements. Advanced transmission technologies have been considered by the electric utilities effectively increase utilization of existing infrastructure flexibility. The focus this paper is on VSC-HVDC for urban grid enhancement modernization. First, a potential technical scheme proposed converting an AC circuit DC operation, which could boost transfer capability...
In this study, a hybrid high-voltage direct current (HVDC) topology with line commutated converter (LCC) and modular multilevel (MMC) in series-connection is proposed, which suitable for bulk power overhead transmission. This of operational flexibility terms active reactive controls, able to withstand ac dc faults by the cooperative control LCC MMC. First, operation principle mathematical model are presented. Then, strategies at rectifier inverter side discussed, can prevent cut-off under...
In this paper, the DC short-circuit fault and corresponding clearance solutions of modular multilevel converter-based high-voltage direct current (MMC-HVDC) systems are analyzed in detail. Firstly, analytical expressions currents before after blocking MMC derived based on operation circuits. Before MMC, sub-module (SM) capacitor discharge is dominant component current. It will reach threshold value several milliseconds. After SM no longer discharged. Therefore, from AC system becomes...
Cross-seam high voltage DC (HVDC) transmission in the United States can provide an efficient and flexible bulk power delivery highway between interconnections. Recent studies have shown significant economic benefits of cross-seam HVDC systems by taking advantages load diversity, frequency response, renewable energy arbitrage different This paper introduces a station-hybrid system scheme for The proposed combines line commutated converter (LCC) source (VSC) technologies, thus enabling...
Light-duty offshore wind power system has been a research hotspot in recent years. The diode rectifier based HVDC scheme is promising solution and attracted more attention. In this paper, self-synchronizing control for farms connected to proposed. active of each turbine controlled by regulating the amplitude AC voltage, while reactive used adjust frequency. proposed decentralized scheme. Thus, no communication network or GPS required only local information system. synchronization turbines...
With the rapid development of photovoltaic and wind power, penetration rate renewable energy in power system is gradually increasing. This escalation poses a challenge as it results continuous reduction inertia damping grid, accentuating issue frequency stability systems. It one effective measures to deal with this risk that sources such turbines actively provide support for grid. paper carries out research into examination turbines’ capacity contribute support, considering two aspects:...
Colorectal cancer (CRC) remains one of the most common cancers worldwide. Increasing evidence indicates that SPRY4 intronic transcript 1 (SPRY4-IT1) regulate cell growth, differentiation, apoptosis, and progression. However, expression function SPRY4-IT1 in progression CRC largely unknown. Here, we reported was upregulated CRC. Increased associated with larger tumor size higher clinical stage. In vitro experiments revealed knockdown significantly inhibited proliferation by causing G1 arrest...
DC fault isolation is one of the main challenges HVDC grid. current can be interrupted within several milliseconds by employing hybrid circuit breaker. However, this scheme not cost-effective, especially in meshed In paper, a novel integrated breaker sharing components proposed to overcome these drawbacks. Suppose that converter grid connected m lines. The consists + 1 ultra-fast disconnectors (UFDs), load commutation switches (LCSs), mechanical (DSs), and only (MB) surge arrester (SA)....
Traditional permanent magnet synchronous generator (PMSG)-based wind turbine (WT) normally utilises phase lock loop (PLL) for obtaining accurate angle of AC grid to make sure maximum power point tracking (MPPT). However, a weak system with low short circuit ratio (SCR) and high control bandwidth PLL might have impaired effects on the stability system. To overcome these, novel PMSG-based WT forming ability PMSG integrating very is first proposed in this study. Grid-side converter (GSC)...
Considering the voltage difference between neutral points of DC side and AC side, this study first establishes differential mathematical model modular multilevel converter (MMC). Then, through proposed successive approximation approach, analytical expressions electrical quantities are derived, including arm current, output capacitor two points, instantaneous active reactive power, reactance current switching devices. The approach contains three main steps. In step 1, preliminary MMC's based...
Acquired evidence indicated that microRNAs (miRNAs) played essential roles in cancer development, including hepatocellular carcinoma (HCC). Functions and mechanisms of miRNAs involved HCC remain largely unknown. Here, we found miR-384 was significantly downregulated cells tissues by RT-PCR. Gain loss function studies revealed suppressed cell proliferation. Insulin receptor substrate 1(IRS1) identified as a direct functional target miR-384. Moreover, decreased IRS1 expression, subsequently...
HVDC system can realize a very fast frequency response to the disturbed under contingency because its active power control is decoupled from deviation. However, most of existing strategies are coupled with primary and secondary control. Since traditional dominated by thermal generators, advantage not made fully used. The development estimation based on machine learning algorithm provides another approach improve capability system. Different other deviation tracking strategies, directly...
This paper proposes a high-voltage direct current (HVDC) overhead-line transmission system with embedded energy storage (ESS) to address the challenges posed by large-scale renewable over long-distance. The is designed provide power support, suppress fluctuations, and clear DC faults effectively. An innovative grid-stabilizing converter (GSC) an integrated ESS, comprising new submodules (SMs), installed in both rectifier inverter stations. includes analysis of operating principle proposed...