A5038280275- Microgrid Control and Optimization
- Wind Turbine Control Systems
- Power Systems and Renewable Energy
- High-Voltage Power Transmission Systems
- HVDC Systems and Fault Protection
- Power System Optimization and Stability
- Smart Grid and Power Systems
- Wind Energy Research and Development
- Robotic Path Planning Algorithms
- Islanding Detection in Power Systems
- Anomaly Detection Techniques and Applications
- Cerebral Venous Sinus Thrombosis
- melanin and skin pigmentation
- Power Systems Fault Detection
- Infrastructure Resilience and Vulnerability Analysis
- Advanced Surface Polishing Techniques
- Robotics and Sensor-Based Localization
- Adaptive Dynamic Programming Control
- Smart Grid Security and Resilience
- Tunneling and Rock Mechanics
- Power System Reliability and Maintenance
- Video Coding and Compression Technologies
- Power Quality and Harmonics
- Flavonoids in Medical Research
- Retinoids in leukemia and cellular processes
Southwest Petroleum University
2025
Hainan University
2024
Hunan First Normal University
2023-2024
Inner Mongolia University
2024
Hunan University
2019-2023
Central South University
2009-2022
Huzhou Central Hospital
2022
Xiangya Hospital Central South University
2022
Central Hospital of Zibo
2019
The University of Sydney
2014
In this paper, a virtual inertia and damping control (VIDC) strategy is proposed to enable bidirectional DC (bi-DC) converter dampen the voltage oscillation, using energy stored in storage system (ESS) emulate of microgrid (DC-MG) without modifications hardware. Both part are modelled VIDC regulator, by analogizing with machine. Droop introduced achieve multi-parallel operation ESS. Further, its small signal model established dynamic characteristic bus during power fluctuation analyzed. A...
Power system resilience refers to the ability of power grid withstand extreme events and recover quickly from disturbances. Recently, most evaluation methods are based on topological structure grid, while impacts sources were not taken into consideration. By analogy change progress operating state under external force in mechanics, this article proposes a method support network topology. Taking high-voltage direct-current battery energy storage as typical electronic-based source, its...
This study investigates the impact of wind spatial distribution on sub‐synchronous resonance (SSR), considering speed difference and turbine division. For a doubly‐fed induction generator (DFIG) farm, two equivalent aggregated models, i.e. one‐DFIG model multi‐DFIG model, are established both simplified to impedance for investigation. In SSR mechanism in DFIG discussed. The concept damping is introduced explain how current changes under negative resistance farm. Then, DFIGs divided into...
This focus of our research is to investigate the protective effect Baicalin on apoptosis and mTOR/AKT/GSK-3β pathway in substantia nigra neurons a rat model for Parkinson’s disease, induced by 6-Hydroxydopamine. Thirty healthy female Sprague-Dawley rats were randomly divided into control group, group. The Parkinson was established injecting 6-Hydroxydopamine right group intragastrically administered with (25 mg/kg/day) four weeks. At same time, groups equivalent solvents. We observed turns,...
Due to the intermittent power generation, wind farms integrated into grid may cause a problem of large frequency fluctuation, when capacity load control (LFC) is not enough compensate unbalance between generation and demand. In this study, new robust LFC strategy against disturbance fluctuation proposed improve disturbance‐resistant performance system with farms. First, simplified model established without considering accurate information. Then, scheme based on compensation equivalent input...
The DFIG-based wind farm faces sub-synchronous oscillation (SSO) when it is integrated with a series-compensated transmission system. equivalent SSO damping influenced by both speed and compensation level. However, hard for the to obtain level in time predict risk. In this paper, an risk prediction method DFIG proposed based on characteristics identified from noise-like signals. First, SSO-related parameters are analyzed. Then, potential frequency signals at normal working points integration...
As one of the important renewable energies, wind power has been exploited worldwide. Modeling plays an role in high penetration farms smart grids. Aggregation modeling, whose benefits include low computational complexity and computing speed, is widely used farm modeling simulation. To contribute to development generation, a comprehensive survey aggregation given this article. A model consists three parts, respectively, speed model, turbine generator (WTG) WTG transmission system model....
The paper presents research on mode identification of broad-band oscillation in interconnected power system. A data-driven (DDMI) method for signals is proposed creatively this paper. Firstly, piecewise aggregation approximation algorithm improved to achieve effective dimension reduction data. Combined with <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${k}$ </tex-math></inline-formula> -Shape clustering...
Importance Mild thyroid-associated ophthalmopathy (TAO) negatively impacts quality of life, yet no clinical guidelines for its treatment are available. Existing evidence supports the use doxycycline in treating mild TAO. Objective To evaluate short-term (12 weeks) efficacy Design, Setting, and Participants In this placebo-controlled multicenter randomized double-masked trial, 148 patients were assessed eligibility. After exclusions (patients who pregnant or lactating, had an allergy to...
This paper investigates sub-synchronous resonance (SSR) phenomena inside a doubly-fed induction generator (DFIG) based wind farm, considering the impact of spatial distribution speed. Firstly, impedance model one-DFIG aggregated farm is presented to analyze effect. Then, two-DFIGs model, DFIGs in both low speed and high developed influence spatially on SSR farm. The number under different speeds, which represented distribution, will SSR. When there are more speed, occur simultaneously all...
With the gradual increases in use of wind power and photovoltaic generation, penetration rate electronics has increased recent years. The inertia characteristics power-electronic-based sources are different from those synchronous generators, making evaluation difficult. In this paper, analyzed. A measurement-based identification method for sources, as well high-power-electronic-penetrated systems, is proposed by fitting frequency data. control strategies corresponding parameters discussed a...
The authors present a stepwise reduction and approximation method for generalized stochastic Petri nets (GSPNs) in order to reduce their state space. When subnet is reduced simpler structure, not only the qualitative properties but also quantitative characteristics such as token flow rates are preserved. first define various kinds of potentially reducible subnets then rules on selection, construction, evaluation. Two criteria judging step number states final net during process error...
Sub-synchronous Oscillation (SSO) is a serious incident in power system, and has been occurred wind farms many times during the past decade. In this paper, energy flow method used to analysis SSO interactions. Firstly, relationship between oscillation damping explained. Then, function two nodes system presented. By calculating from measureable signals, flows different can be revealed. Simulation shows how turbine generators interact, discusses equivalent resistance of generator.
In this paper, we present a multi-object optimization model to obtain the optimal ultra-high voltage direct current UHVDC access position. With consideration of safety and stability power system, economy, flow distribution, effective short-circuit ratio, static active loss in different areas are respectively yield indexes. Weighted by coefficient-of-variation method, these indexes aggregated build objective function. The presented is applied Hunan grid solve its planning problem. By solving...
More and more attention on wind farm sub-synchronous oscillation (SSO) has been paid as many SSO incidents in farms have occurred. This paper presents an overview of recent issues from the perspective control, including analysis methods, study system, mitigation by damping control. Three major well different systems for study, are comprehensively reviewed. The adaptability complexity methods analysed, overall survey is given. Among controller (SSDC) one most commonly used practice. Its...