A5100367473- HVDC Systems and Fault Protection
- High-Voltage Power Transmission Systems
- Power Systems Fault Detection
- Microgrid Control and Optimization
- Power Systems and Technologies
- Islanding Detection in Power Systems
- Smart Grid and Power Systems
- Power Systems and Renewable Energy
- Power System Reliability and Maintenance
- Multilevel Inverters and Converters
- Power System Optimization and Stability
- Advanced DC-DC Converters
- Optimal Power Flow Distribution
- Electrical Fault Detection and Protection
- Silicon Carbide Semiconductor Technologies
- Wind Turbine Control Systems
- High voltage insulation and dielectric phenomena
- Smart Grid Security and Resilience
- Advanced Battery Technologies Research
- Energy Load and Power Forecasting
- Lightning and Electromagnetic Phenomena
- Frequency Control in Power Systems
- Solidification and crystal growth phenomena
- Machine Fault Diagnosis Techniques
- Power Quality and Harmonics
South China University of Technology
2015-2024
Taiyuan Heavy Industry (China)
2024
Shenzhen University
2024
State Grid Corporation of China (China)
2013-2023
National Research Center for Rehabilitation Technical Aids
2022-2023
Changchun University of Technology
2023
Shanghai Electric (China)
2023
Southwest Jiaotong University
2022-2023
Shandong University
2022-2023
Minzu University of China
2023
From the perspective of self-organized criticality, this paper develops a novel model with AC-OPF and AC grid upgrade to study cascading failures blackouts in power systems, which overcomes some shortcomings existing blackout models. The proposed contains two types dynamics, one is fast dynamics simulates serial other slow reflects tendency systems time evolution. This also has voltage stability analysis function can reveal critical characteristics from reactive viewpoint. Simulation results...
Line-commutated converter-based-high-voltage direct-current (LCC-HVDC) transmission technology has been developing very rapidly. However, the sensitivity and reliability of HVDC line protection require further improvement. An analysis different fault types is conducted to show that normalized voltage change rate without influence wave propagation can more effectively distinguish between internal external faults with high resistances. Owing difficulty obtaining an accurate solution for a...
This paper presents a novel time-domain fault location algorithm on HVDC transmission lines. The Bergeron line model is adopted to construct equation, considering unsynchronized two-end measurement and uncertain parameters. zero time reference point set the sample of arrival at each end for traveling wave-head. Time-tags all points change with reference. So difference measurements has changed also, equals between arrivals two ends That makes it possible mix wave theory method. Besides, ratio...
The periosteum plays an important role in the regeneration of critical-size bone defects, with functions recruiting multiple cells, accelerating vascular network reconstruction, and guiding tissue regeneration. However, these cannot be easily implemented by simply simulating via a material structure design or loading exogenous cytokines. Herein, inspired periosteal function, we propose biomimetic preparation strategy to enhance natural polymer hydrogel membranes using inorganic bioactive...
The deployments of inverter-interfaced distributed generators (IIDGs) in medium voltage distribution networks may cause undesirable trips or tripping failures conventional two-terminal current differential protective relays. It is economically and technically unfeasible to reconfigure large numbers time-synchronized sampling clocks communication channels for each terminal inside the protected zone. In this paper, a more accurate IIDG mathematical equivalent model established that considers...
DC circuit breakers (DCCBs) are vital for the safe and continuous operation of large high-voltage dc grids. Insulated-gate bipolar transistor-based hybrid DCCBs (IHCBs) can interrupt currents quickly have good operational characteristics. Thyristor-based (THCBs) superior to IHCBs in terms interruption capacity because surge current thyristors. Nevertheless, existing THCBs limitations regarding one or more following characteristics: pre-activation, fast reclosing, quick small no requirement...
Because the traditional zero-sequence overcurrent protection method is not effective in detecting single-phase-to-ground faults (SPGF) a low-resistance grounded system (LRGS), this paper analyzes fault characteristics of 10-kV LRGS detail. From perspective time domain, relationship between current and voltage deduced, corresponding to faulty lines nonfaulty are analyzed. The analysis reveals that ratio fluctuation coefficients differential have notably different characteristics;...
The Conventional zero-sequence (ZS) overcurrent protection method exhibits poor performance for single-phase to ground faults (SPGFs) with high impedance in low-resistance grounded systems (LRGSs), a type of medium-voltage (MV) distribution system. Hence, this study, novel SPGF detection methodology, designed specifically LRGSs, is proposed. Considering the effects system imbalance, crucial limitation based on ZS components, concept Δ-circuit first utilized suppress such effects, maintaining...
A novel fault location scheme using feeder terminal units (FTUs) for high-impedance grounding faults in resonant systems (RGSs) is presented. The parallel resonance a (HIF) an RGS with inverter-interfaced distributed generators (IIDGs) analyzed. process exhibits unique distribution features transient zero-sequence components involving underdamped and overdamped states. We conclude that the admittances (TZSAs) from FTUs upstream of point have maximum value, while TZSAs obtained downstream are...
<div>To alleviate the problem of reduced traffic efficiency caused by mixed flow heterogeneous vehicles, including autonomous and human-driven this article proposes a vehicle-to-vehicle collaborative control strategy for dedicated lane in connected automated vehicle system. First, lane’s operating formation performance are described. Then, characteristics formations determined, was developed. Subsequently, an interactive established queueing under coordination queue formation, merging,...
Conventional zero-sequence current (ZSC) protection relays for low-resistance grounded systems (LGSs) are confronting challenges due to the risk of multiple single-phase grounding faults (MSGFs) and ongoing increase in penetration inverter-interfaced distributed generators (IIDGs). Such issues concerning false or failure tripping require a reconsideration traditional solutions. This paper presents novel adaptive ZSC scheme using current-compensation method LGSs with IIDGs. The mechanism...
Summary Virtual synchronous generators (VSGs) are comprised of an outer power loop and inner cascaded control loops. The dynamic performance the output interface is severely degraded when microgrid loads exhibit variability nonlinearity. Therefore, robustness against load disturbances must be possessed by any voltage scheme. In this paper, a proportional resonance‐linear active disturbance rejection (PR‐LADRC) scheme based on improved linear extended state observer (ILESO) proposed for VSG...
The fault resistance is the key factor to affect travelling waves and performance of travelling-wave-based protections on HVDC transmission lines. In order explain accurately impacts in theory improve computational efficiency existing data at given conditions, this paper proposed a global-sensitivity-based method fast predict new with any other resistance. This was built actual project topology its frequency-dependent nature, derived by infinite-Taylor series phase frequency domain, then...
With the trend toward achieving high efficiency, power density and operating frequency in converters, a galvanic isolated circuit architecture is proposed this article for step-up applications with wide input-voltage range. This converter consists of current-fed resonant push-pull (PP) as dc transformer (dcX) dealing most efficiency an active clamp flyback (ACF) regulator within large conversion As single-stage converter, ACF paralleled PP to share total regulates output voltage. An...
Due to its high modularity and scalability, the modular multilevel converter (MMC) has extensively been used in modern industry. The low reliability of MMCs, which are consisted tens or hundreds vulnerable submodules (SMs), directly impacts power supply continuity access systems. Redundancy preventive maintenance two significant measures improve MMC operation. Therefore, this article presents a model MMCs with numerous SMs, whose lifetime follows arbitrary distribution, redundancy...