A5072697906- Microgrid Control and Optimization
- Islanding Detection in Power Systems
- Power Systems and Renewable Energy
- Smart Grid Energy Management
- Birth, Development, and Health
- Pregnancy and preeclampsia studies
- HVDC Systems and Fault Protection
- Optimal Power Flow Distribution
- Epigenetics and DNA Methylation
- Embedded Systems and FPGA Design
- Advanced DC-DC Converters
- Power Systems Fault Detection
- Smart Grid Security and Resilience
- Drug Transport and Resistance Mechanisms
- Ubiquitin and proteasome pathways
- Pluripotent Stem Cells Research
- Hormonal Regulation and Hypertension
- Optimization and Search Problems
- Reproductive Biology and Fertility
- Industrial Automation and Control Systems
- Advanced Measurement and Detection Methods
- Real-Time Systems Scheduling
- Cholesterol and Lipid Metabolism
- Fatty Acid Research and Health
- Multilevel Inverters and Converters
Hunan University
2015-2024
University of Hong Kong
2021-2024
Zhongnan Hospital of Wuhan University
2018-2024
Wuhan University
2018-2024
Second Affiliated Hospital of Nanjing Medical University
2021-2024
Chinese University of Hong Kong
2023
Shanghai Jiao Tong University
2023
Ministry of Agriculture and Rural Affairs
2022
Guangdong Academy of Agricultural Sciences
2022
Nanjing Medical University
2021
Large transient inrush fault current in a synchronverter during short-circuit can potentially damage the inverter and cause grid instability. It is therefore important to study characteristics of way restrain current. This paper investigates proposes new control method based on mode switching protect synchronverters. First, an ideal voltage source instantaneous calculation for symmetrical short circuit discussed. Then, inertia synchronverter, approximate described. The results show that...
Active power oscillation is observed when two or more parallel synchronverters undergo load fluctuations, potentially impacting the safe operation of synchronverters. This article provides a fundamental analysis for mechanisms and proposes new control strategy suppressing especially excitation proposed. It found that inherently caused by weak damping large inertia under condition undesirable instantaneous active sharing. Then, reducing synchronverters, which sharing, deduced. The effectively...
Renewable energy sources (RESs) are highly penetrated in power systems through phase-locked loop (PLL) synchronized converters. Under severe grid voltage sags, PLL-synchronized RES system is susceptive to transient instability and tripping from the due inappropriate current injection. The existing literatures mainly focus on synchronization issues of a single grid-connected system, effect interaction between them rarely studied. To fill this gap, paper aims clarify mechanism characterize...
To improve the resilience of distribution networks (DNs) in event extreme natural disasters such as typhoons and rainstorms, it is imperative to efficiently implement service restoration (DSR) restore loads soon possible. In previous studies, DSR has mainly adopted distributed resource model with droop or PQ control. This inhibits exploitation potential generators (DGs) load when DN loses support from upstream transmission network. Thus, this paper proposes a multi-resource collaborative...
Microgrids rely on both primary and secondary frequency control techniques to maintain system stability. Secondary effectively minimizes fluctuations by adjusting the active power reference in each inverter, but requires complex costly interequipment communication. In this paper, we propose a distributed strategy for microgrids containing multiple virtual synchronous generator (VSG) units based new maximum loading factor (MPLF) concept. The MPLF algorithm facilitates sharing dynamically...
Parallel operation of synchronous generators (SGs) and virtual (VSGs) is an important way to guarantee the safe microgrid in remote islands or rural areas. However, system may experience transient voltage instability when a high penetration level induction motor (IM) loads connected. This paper considers dynamics SG VSG investigate stability paralleled with IM load. The effects SG's VSG's active power loops (APLs) are analyzed detail due low inertia microgrids coupling introduced by network...
Cancer remains the primary cause of death worldwide. To develop less toxic anti-cancer drugs to relieve suffering and improve survival cancer patients is major focus in field. this end, marine creatures are being extensively studied for their effects, since extracts from at least 10% organisms have been shown possess anti-tumor activities. As a classic Chinese traditional medicine, sea cucumbers compounds extracted cucumbers, such as polysaccharides saponins, recently exhibit anti-cancer,...
The safety of grid-connected voltage-controlled inverter is threatened by transient angle instability due to fault. impact different active power control (APC) and reactive (RPC) on the inverter's stability hasn't been fully investigated. To fill this gap, firstly, a unified model considering APC RPC put forward. Based proposed model, effect loops are qualitatively analyzed using equal area criterion (EAC). Then, TS multimodeling method which based Lyapunov function applied evaluate...
Abstract Background The use of prenatal dexamethasone remains controversial. Our recent studies found that exposure can induce maternal intrahepatic cholestasis and have a lasting adverse influence on bile acid (BA) metabolism in the offspring. purpose this study was to investigate effects fetal-placental-maternal BA circulation during intrauterine period, as well its placental mechanism. Methods Clinical data human placentas were collected analyzed. Pregnant Wistar rats injected...
Poor power management of bidirectional interlinking converter (BIC) and sub-grids in a hybrid AC/DC microgrid can lead to heavy or light load state some distributed energy resources (DERs), large deviations AC bus voltage/frequency DC voltage. This study proposes strategy based on the concept coordination factors for microgrids achieve accurate active sharing among all DERs (instead same within one sub-grid), reactive DERs, voltage restorations. Power sub-grid is achieved by following leader...
Clinical studies have showed that dexamethasone exposure during pregnancy could cause fetal growth retardation, but the mechanism by which prenatal influences placental nutrient transport is still unclear. This study investigated impacts of on oxygen and transport.Pregnant Wistar rats were subcutaneously administered with from day 9 to 20 gestation at 0.2 or 0.8 mg/kg·d. Pregnant sacrificed gestational 20. The tissue was collected for analysis.Prenatal (PDE) declined weight increased...
Unlike conventional synchronous generators, the fault characteristics of inverter-based distributed generators (IBDGs) are mainly determined by inverter control strategies. Their limited current contributions make protection design islanded microgrids (MGs) become a major challenge. This article focuses on and scheme MGs. First, phase differences between positive-sequence components (PSC-FCs) at both terminals line analyzed under different network topologies severities. It points out...
The Microgrid voltage may deviate from the grid when it operates in islanded mode, which will result unexpected large inrush currents during re-connection process. This paper proposed a new self-synchronization control strategy for synchronverter with local loads utilizes reference phase angle of as rotating frame. A compensation quantity and frequency can be obtained by PI unit then provided to virtual synchronous unit. Synchronization implemented automatically regulation quantity....
Due to the insufficient fetal cholesterol synthesis, maternal transport through placenta becomes an important source of pool, which is essential for growth and development. This study aimed investigate effects dexamethasone on levels, explore its placental mechanism. Pregnant Wistar rats were injected subcutaneously with (0.8 mg/kg·d) from gestational day 9 20. Results showed that increased serum total (TC), high-density lipoprotein-cholesterol (HDL-C), low-density (LDL-C) as well synthesis...
Abstract Human expanded potential stem cells (hEPSC) have been derived from human embryonic and induced pluripotent cells. Here direct derivation of hEPSC pre‐implantation embryos is reported. Like the reported hEPSC, embryo‐derived (hEPSC‐em) exhibit a transcriptome similar to morula, comparable differentiation potency, high genome editing efficiency. Interestingly, hEPSC‐em show unique H3 lysine‐4 trimethylation (H3K4me3) open chromatin conformation; they possess higher proportion H3K4me3...
Voltage fluctuation suppression and reactive power proportional sharing in islanded microgrids (MGs) are often difficult to maintain simultaneously. Hence, a dynamical reconfigurable master–slave control architecture is proposed herein. When load fluctuates, the leader will be dynamically selected through specific features (such as output power, voltage, capacity); subsequently, sends his information all other distributed generators (DGs) unified signal MG. Meanwhile, DGs adjust their local...