A5053011211- HVDC Systems and Fault Protection
- Energy Load and Power Forecasting
- Electric Power System Optimization
- High-Voltage Power Transmission Systems
- Advanced Sensor and Energy Harvesting Materials
- Microgrid Control and Optimization
- Wind Energy Research and Development
- Solar Radiation and Photovoltaics
- Silicon Carbide Semiconductor Technologies
- Electric Vehicles and Infrastructure
- Grey System Theory Applications
- Supercapacitor Materials and Fabrication
- Infrastructure Maintenance and Monitoring
- Advanced Materials and Mechanics
- Cardiac Structural Anomalies and Repair
- Machine Fault Diagnosis Techniques
- Control Systems in Engineering
- Lightning and Electromagnetic Phenomena
- Innovative Energy Harvesting Technologies
- Optimal Power Flow Distribution
- Energy and Environment Impacts
- Graphene research and applications
- High voltage insulation and dielectric phenomena
- Evaluation Methods in Various Fields
- Vehicle emissions and performance
Ningbo University
2025
China University of Mining and Technology
2020-2024
Heilongjiang Earthquake Agency
2023
Fuzhou University
2021
Wuhan University
2017
University of Tennessee at Knoxville
2015-2016
Knoxville College
2016
This paper presents a steady-state model of MMC for the second-order phase voltage ripple prediction under unbalanced conditions, taking impact negative-sequence current control into account. From model, circular relationship is found among and quantities, which can be used to evaluate magnitudes initial angles different circulating components. Moreover, in order calculate point-to-point MMC-based HVdc system grid derivation equivalent dc impedance an discussed as well. According inverter...
Flexible, wearable, piezoresistive sensors have significant potential for applications in wearable electronics and electronic skin fields due to their simple structure durability. Highly sensitive, flexible, with the ability monitor laryngeal articulatory vibration supply a new, more comfortable versatile way aid communication people speech disorders. Here, we present sensor novel microstructure that combines insulating conductive properties. The has polystyrene (PS) microspheres sandwiched...
Dc fault protection is a main challenge in voltage source converter (VSC) based multi-terminal high direct current (HVDC) systems. This paper develops systematic dc strategy for systems utilizing hybrid circuit breakers as the devices. A two-step detection method to accommodate proactive breaker has been simulated and demonstrated with both fast speed selectivity. The necessities of temporary blocking HVDC converters pole-to-pole pole-to-ground faults have evaluated, corresponding criteria...
Interval forecasting has become a research hotspot in recent years because it provides richer uncertainty information on wind power output than spot forecasting. However, compared with studies single farms, fewer exist for multiple farms. To determine the aggregate of this paper proposes an interval method based long short-term memory (LSTM) networks and copula theory. The uses LSTM firstly then error data generated by to model conditional joint probability distribution errors farms through...
This study analyzed the transformer electromagnetic gap propagation characteristics. The influence of size is also analyzed, and results experimentally verified. obtained indicated that characteristics wave signals radiated by partial discharge (PD) source in different directions are substantially different. intensity reaches a maximum at height 1 cm; inside gap, depicted an increasing trend tail area gap. Finally, from results, some suggestions on where to install sensors practical systems...
With the continuous optimization of energy structures, wind power generation has become dominant new source. The strong random fluctuation natural will bring challenges to system dispatching, so it is necessary predict power. In order improve short-term prediction accuracy regional power, this paper proposes a combination model based on convolutional neural network (CNN) and similar days analysis. Firstly, least square fitting batch normalization (BN) are used preprocess data, then recent...
This paper presents the implementation of a scaled 4-terminal high-voltage direct current (HVDC) test-bed. The hardware construction, control scheme and communication architecture are described. typical scenarios such as system start-up, station online recommission, power variation, mode transition failure emulated in A dc line is proposed to allow disconnecting lines by using HVDC disconnectors with low interrupting capability instead expensive circuit breaker. can be further utilized for...
Multi-terminal dc (MTDC) grid has been considered as a promising future transmission and distribution system architecture, especially for remote renewable energy integration. However, short-circuit faults can be more detrimental to grids than ac grids. The lack of effective economical circuit breakers potential significant impact fault on the connected have become main barrier application. This paper analyzes major differences under conditions. After that, is evaluated by comparing with an...
With the large-scale integration of new energy, obstruction energy consumption is prone to occur often during peak-down periods with a low load and high output energy. It urgent mobilize controllable shifting through compensation mechanisms achieve goals peak shaving, valley filling, promotion consumption. This study constructs framework auxiliary service market mechanism for power shift between generation enterprises enterprises. Secondly, aiming principle revenue balance enterprises,...
When a large number of distributed photovoltaic (PV) systems are integrated into the distribution network, power flow becomes bidirectionally fluctuating, resulting in variable line losses. In scenario reverse flow, increase loss is particularly significant. The bidirectional reactive regulation inverters an effective approach to reduce losses network. However, despite benefits reducing losses, by also incurs additional costs. Therefore, there need for research comprehensive benefit...
The influencing factors of building seismic capacity are analyzed, the basic cause events assessment target based on fault tree analysis (FTA) determined, in FTA model classified and summarized, a judgment system is built. weight each index factor Gini calculation used, importance analyzed. On basis Spearman correlation coefficient index, improved naive Bayesian algorithm combined with to build for housing buildings. sample set constructed data some buildings Huoshan County. In order improve...
Wind power has strong stochastic volatility, short-term forecasting accuracy is not high. With the increase of grid connected capacity wind farms, overall prediction error a greater impact on system operation. This paper investigates problem for farms based historical and meteorological data. First, preprocessed original data are divided into training set test set, random forest (RF) algorithm applied to screen out feature that have greatest output from all set. Then, sample sets...
When multiple scattered wind farms are connected to the power grid, meteorological and geographic information data used for prediction of a single farm not suitable regional dispatching department. Therefore, based on historical data, this study proposes combined method according decomposition. Firstly, original sequence processed by extension methods is decomposed into several regular components Complete Ensemble Empirical Mode Decomposition with Adaptive Noise (CEEMDAN). All classified two...