A5082921193- Microgrid Control and Optimization
- HVDC Systems and Fault Protection
- Advanced Battery Technologies Research
- Power Systems and Renewable Energy
- High-Voltage Power Transmission Systems
- Electric Vehicles and Infrastructure
- Multilevel Inverters and Converters
- Smart Grid Energy Management
- Frequency Control in Power Systems
- Advanced DC-DC Converters
- Advancements in Battery Materials
- Ferroptosis and cancer prognosis
- Optimal Power Flow Distribution
- Power Systems and Technologies
- Epigenetics and DNA Methylation
- Pancreatic and Hepatic Oncology Research
- Thermochemical Biomass Conversion Processes
- Optical Network Technologies
- Smart Grid and Power Systems
- Cancer-related Molecular Pathways
- Integrated Energy Systems Optimization
- Advanced Photonic Communication Systems
- Power System Reliability and Maintenance
- Atmospheric chemistry and aerosols
- Advanced Sensor and Control Systems
Third Hospital of Hebei Medical University
2025
Hebei Medical University
2025
Peking University
2023-2024
Tianjin University
2017-2024
Xijing Hospital
2024
Air Force Medical University
2024
Wuhan Institute of Technology
2023-2024
China National Nuclear Corporation
2023-2024
Hebei University of Technology
2024
Capital Medical University
2024
Pulsed power loads (PPLs) are becoming prevalent in medium-voltage naval dc micro-grids. To alleviate their effects on the system, energy storages commonly installed. For optimal performance, interface converters need to have fast dynamics and excellent disturbance rejection capability. Moreover, these often voltage transformation galvanic isolation capability since common storage technologies such as batteries supercaps typically assembled with low-voltage strings. In order address issues,...
Pulsed power loads (PPLs) are commonly incorporated in medium voltage dc microgrids on naval vessels. To mitigate their detrimental effects, dedicated energy storage systems can be installed and converters need to have excellent disturbance rejection capability. facilitate this objective, a moving-discretized-control-set model-predictive-control (MDCS-MPC) is proposed letter applied dual-active-bridge converter. Fixed switching frequency maintained, enabling easy passive components design....
Modular multilevel converters (MMCs) have attracted extensive research interests in various ac and dc conversion applications due to their modular structure excellent harmonic performance. However, the large number of power switches increases potential risk submodule (SM) failure, which greatly challenges safe reliable operation MMC. This article presents a detailed review fault diagnosis fault-tolerant control methods MMC under SM failures. On this basis, comprehensive comparisons are...
The open-circuit fault detection and localization (FDL) technique can improve the reliability of modular multilevel converter (MMC). However, conventional software-based FDL methods usually have a heavy computation burden or limited speed. This article proposes simplified fast approach for grid-connected MMC. First, errors between measured state variables (the output current circulating current) their estimated values are calculated. By comparing these with threshold values, switch not only...
Kagome superconductors AV3Sb5 (A = K, Rb, Cs) provide a fertile playground for studying intriguing phenomena, including nontrivial band topology, superconductivity, giant anomalous Hall effect, and charge density wave (CDW). Recently, C2 symmetric nematic phase prior to the superconducting state in drew enormous attention due its potential inheritance of symmetry unusual superconductivity. However, direct evidence rotation breaking electronic structure CDW from reciprocal space is still...
Model predictive control (MPC) is widely employed in voltage-source converters due to its fast-dynamic response, straightforward realization, and flexible inclusion of multiobjective regulation. However, the MPC has several technical challenges when it comes modular multilevel converters, such as computational complexity, variable switching frequency, poor steady-state performance well tedious weighting factor selection. To solve these problems, this article proposes a new modulated method,...
Battery energy storage systems (BESSs) have been widely used in power grids to improve their flexibility and reliability. However, the inevitable battery life degradation is main cost BESS operations. Thus, an accurate estimation of aging strongly needed cover actual BESSs. The existing models either are not fully estimate or solved easily because computation nonlinearity. In this paper, a piece-wise linear model with for BESSs proposed extend profits. our method, widely-used Arrhenius law...
In this paper, a three-terminal ac/dc hybrid microgrid with two dc terminals and one ac terminal is proposed. The proposed system consists of cascaded H-bridge (CHB) converters based grid interface dual active bridge (DAB) subgrid that connects isolated buses. order to reduce the number power conversion stages devices, DAB are directly connected CHB rails according operation requirement. To overcome imbalanced currents rail voltages issues caused by modified configuration only stages, an...
Fault-tolerant operation ability is of great importance for stable cascaded H-bridge (CHB) converters, under open-circuit (OC) or short-circuit (SC) switch failures in submodule (SM). In this article, an improved fault-tolerant control strategy proposed CHB-based static synchronous compensator (STATCOM) SM faults. First all, compared with the conventional method directly bypassing faulty SMs, takes advantage healthy switches where they are still able to generate either positive negative...
The model predictive control (MPC) methods have been widely applied due to the fast dynamic performance and multiple targets. However, they show certain limits when multilevel converters, such as unfixed switching frequency, large computation burden, complex weighting factors selection. This article proposes a novel modulated MPC (M <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> PC) method for cascaded H-bridge (CHB) converter-based...
With the high penetration of power electronic loads in grid, stability static synchronous compensator (STATCOM) devices is greatly challenged. However, conventional control methods for modular multilevel converter (MMC) based STATCOM only consider with small signal disturbances. This article proposes a novel dual-layer back-stepping (BSC) MMC-based STATCOM. In first layer, BSC aims to regulate sum capacitor energy and reactive output current. second circulating Therefore, proposed method...
Rationale: Demyelination is a major component of white matter injury, characterized by oligodendrocyte (OL) death and myelin sheath loss, which result in memory loss cognitive impairment the context ischemic stroke.Accumulating evidence has shown that OLs can be generated direct activation defined transcription factors (TFs) human induced pluripotent stem cells (hiPSCs); however, rapid acquisition single TF-induced OL progenitor (OPCs) as cell therapy for stroke remains to thoroughly...
Accurate greenhouse gas (GHG) emission reporting is critical for governments, businesses, and investors. However, adoption remains limited particularly among small medium enterprises due to high implementation costs, fragmented factor databases, a lack of robust sector classification methods. To address these challenges, we introduce Group Reasoning Emission Estimation Networks (GREEN), an AI-driven carbon accounting framework that standardizes enterprise-level estimation, constructs...
A solution-processed ZnO:Li NP window layer is demonstrated to enhance charge collection and minimize interface recombination in kesterite solar cells.
A novel capacitor voltage balancing scheme for modular multilevel cascade converter-double-star chopper-cells (MMCC-DSCC)-based STATCOM is proposed in this paper. Compared with the conventional software methods, has three main advantages. First, only six sensors are needed, and other have been removed. Then, control framework can be simple without sort select process, or some loops. Additional delay process caused by sampling signals transmission also mitigated. Finally, faster speed...