A5101517063- Power Systems Fault Detection
- HVDC Systems and Fault Protection
- High-Voltage Power Transmission Systems
- Islanding Detection in Power Systems
- Microgrid Control and Optimization
- Wind Turbine Control Systems
- Wave and Wind Energy Systems
- Electrocatalysts for Energy Conversion
- Photovoltaic System Optimization Techniques
- Advanced Battery Technologies Research
- Power Line Communications and Noise
- solar cell performance optimization
- Energy Harvesting in Wireless Networks
- Power Systems and Renewable Energy
- Non-Destructive Testing Techniques
- Wind Energy Research and Development
- Smart Grid and Power Systems
- Magnetic Field Sensors Techniques
- Fuel Cells and Related Materials
- Frequency Control in Power Systems
- Electrical Fault Detection and Protection
- Evolutionary Algorithms and Applications
- Remote Sensing and LiDAR Applications
- Magneto-Optical Properties and Applications
- Lightning and Electromagnetic Phenomena
China Three Gorges University
2025
Kunming University of Science and Technology
2010-2024
University of Science and Technology of China
2022
Liaoning University of Technology
2011
This paper designs a novel adaptive fractional-order PID (AFOPID) control of permanent magnetic synchronous generator (PMSG)-based wind energy conversion system, which attempts to extract the maximum power by using linear perturbation observer. The combinatorial effect nonlinearities and parameter uncertainties, unmodelled dynamics, stochastic speed variation is aggregated into perturbation, then estimated in real time extended-state observer called high-gain state Besides, estimate used as...
Abstract Although dye‐encapsulated metal‐organic framework (dye@MOF) phosphors exhibit excellent advantages (e.g., high quantum yield (QY) and luminescence tunability) in white light emitting diodes (WLEDs) lighting, the considerable fluorescence quenching of these dye@MOF remains an unmet challenge due to their low thermal conductivity strong accumulation. In this research, a QY phosphor (QY = 78.4%) is successfully prepared using secondary growth method. Through situ doping hexagonal boron...
This study designs a passivity‐based linear feedback control scheme of permanent magnetic synchronous generator‐based wind energy conversion system, which attempts to achieve maximum power point tracking (MPPT) at generator‐side voltage source converter (VSC) and enhance fault ride‐through (FRT) capability grid‐side VSC simultaneously. A storage function is constructed based on the passivity theory, in actual role each term meticulously investigated while beneficial ones are remained so as...
This study develops a perturbation compensation based sliding‐mode control (PCSMC) strategy of permanent magnetic synchronous generator (PMSG) for optimal extraction wind energy. Firstly, PMSG non‐linearities, uncertain parameters, unmodelled dynamics, and stochastic speed variations are aggregated into perturbation. Then, it is estimated by state observer in the real time. Further, estimate fully cancelled controller (SMC) global consistency, together with considerable robustness thanks to...
As the speedy expansion of power gird, traveling wave fault locator in substation may not always connect to newly added transmission lines time, which reduces effectiveness locator. In this paper, an adjacent fault-free line based location scheme for additional is proposed. Since from results severe difficulty identification waves faulty line, time–frequency matrix performed screen waves. Firstly, order remove influence remote terminals current refraction coefficient theoretically analyzed....
The synchronization of the voltage and current from different terminals is generally unachievable in power grids at mountainous area, which leads to fault location method with synchronized data be impossibly utilized. This paper proposes a distribution based scheme asynchronous for three-terminal transmission lines. At first, faulty section identified by computed each terminal due boundaries formed point tee-point. Since stable after transients decay, calculated without faults can their...
The short-circuit current from the new energy power generator presents special characteristics such as frequency shift, restricted amplitude, unequal positive and negative sequence impedance, high percentage of harmonic content, etc., resulting in risk misoperation or rejection conventional protection. By analyzing propagation traveling wave transmission line after fault, this paper reveals difference between waveforms at both ends under internal fault external fault. similarity forward...
Reflected wave identification is the core of single‐ended travelling fault location, in which obvious superimposed oscillation main obstacle for precise reflected with field data. This study proposes a method based on speeded‐up robust features, can gradually approximate from possibly largest distance to near‐end so as exclude time window containing initial wave. In particular, segmentation divides and into two inconsistent windows, hence that usually follows be effectively separated, such...
Due to the complex structure of T-connection transmission lines, it is extremely difficult identify reflected travelling wave from fault point and that connection by measurement only one terminal. According characteristics line, reflection within line after failure different sections in are analyzed. Based on lattice diagram wave, sequence waves detected at measuring terminal varies with distance faulty section. Moreover, unique each This article calculates arrival time points locations form...
OPINION article Front. Energy Res., 29 April 2022Sec. Process and Systems Engineering https://doi.org/10.3389/fenrg.2022.901035
Large-scale wind farms are generally far away from load centers, hence there is an urgent need for a large-capacity power transmission scheme extremely long distances, such as half-wavelength lines (HWTLs), which can usually span thousands of kilometers large-scale to centers. An accurate fault location method HWTLs needed ensure safe and reliable operation. This paper presents the design modal voltage distribution–based asynchronous double-end (MVD-ADFL) scheme, in phase voltages currents...
The high‐resistance faults at the far end are most important factor that causes protection failure of HVDC transmission lines. In initial stage lines fault, transient information power grid is abundant, and sequential overlapping derivative (SOD) transform can emphasise characteristics high‐frequency signal its sudden change direction, amplify fault characteristics, eliminate noise as possible, which great benefit to identify end. A identification method based on SOD voltage proposed. this...
DC electronic current transformer is the data source of system control and protection device, so its measurement delay has always been concerned. In this paper, modelled equivalently key factors affecting shunt remote module are analyzed. A field test method for characteristics proposed. Moreover, a complex multi-state large generator integrated developed. On basis IEC 60044-8 standard transmission protocol, accuracy signal acquisition with better than 0.2%. The maximum output established...
Abstract The phenomenon of wind abandoned caused by fault transmission lines has occurred frequently. Since current output turbine after may induce the frequency variation fundamental frequency, location based on resistance is easily invalid. In order to locate accurately and rapidly farm line faults, a time‐domain‐based novel method for introduced in this paper. main idea proposed scheme discretise distributed‐parameter model that given form partial differential equations using...
Since the voltage source converter based high direct current (VSC-HVDC) systems owns features of nonlinearity, strong coupling and multivariable, classical proportional integral (PI) control is hard to obtain content effect. Hence, a new perturbation observer fractional-order PID (PoFoPID) strategy designed in this paper for with offshore wind integration, which can efficiently boost robustness performance entire system. Particularly, it employs (FoPID) framework sake compensating estimate,...