Article
Computer Science, Artificial Intelligence
Chengqing Yu, Guangxi Yan, Chengming Yu, Xiwei Mi
Summary: This study proposes a spatio-temporal wind speed prediction model based on the attention mechanism, which can achieve accurate wind speed prediction and provide important technical support for energy management and space allocation in wind farms.
APPLIED SOFT COMPUTING
(2023)
Article
Green & Sustainable Science & Technology
Yu Huang, Bingzhe Zhang, Huizhen Pang, Biao Wang, Kwang Y. Lee, Jiale Xie, Yupeng Jin
Summary: This paper proposes a wind speed prediction model based on spatio-temporal dependency analysis, which improves the accuracy of wind speed prediction by using neural networks and Copula function to extract and analyze the correlation of wind speed series.
Article
Green & Sustainable Science & Technology
Xinhao Liang, Feihu Hu, Xin Li, Lin Zhang, Hui Cao, Haiming Li
Summary: Considering the important role wind speed prediction plays in maintaining stability of the power system, this study proposes the use of a deep residual shrinkage unit based on soft activation (SDRSU) to reduce noise interference in wind speed data. By constructing a deep network with multiple SDRSUs, useful features can be extracted from noisy data. Furthermore, a soft-activation based deep spatio-temporal residual shrinkage network (ST-SDRSN) is used to model the spatio-temporal properties of wind speed series in a wind farm, leading to accurate wind speed prediction by leveraging spatial correlations between turbines. Experimental results using datasets from the NREL demonstrate a 15.87% improvement in prediction accuracy with the ST-SDRSN model.
Article
Thermodynamics
Bowen Yan, Ruifang Shen, Ke Li, Zhenguo Wang, Qingshan Yang, Xuhong Zhou, Le Zhang
Summary: This paper proposes a method that predicts wind speed at multiple locations using both spatial and temporal data, and introduces three deep learning models. These models combine ConvLSTM, ResNet, and 3D convolution to extract spatial and temporal correlations between multi-site wind speeds. The experiments show that the CoReSTL model achieves the best prediction results.
Article
Computer Science, Artificial Intelligence
Ziheng Gao, Zhuolin Li, Lingyu Xu, Jie Yu
Summary: In this study, a dynamic adaptive spatio-temporal graph neural network (DASTGN) is proposed to capture the dynamic spatial dependencies in ocean meteorology data. Experimental results show that the DASTGN improves the performance of the baseline model by 3.05% and 3.69% in terms of MAE and RMSE, respectively.
APPLIED SOFT COMPUTING
(2023)
Article
Economics
Bruno Quaresma Bastos, Fernando Luiz Cyrino Oliveira, Ruy Luiz Milidiu
Summary: The study proposes a U-Convolutional model for predicting hourly wind speeds at a single location using spatio-temporal data with multiple explanatory variables. The model combines a U-Net and Convnet part, showcasing competitive predictive performance on time series datasets.
INTERNATIONAL JOURNAL OF FORECASTING
(2021)
Article
Computer Science, Hardware & Architecture
Yingnan Zhao, Guanlan Ji, Fei Chen, Peiyuan Ji, Yi Cao
Summary: This paper proposes a new method, VASTN, for wind speed prediction that combines VMD, SENet, and AM-BiLSTM to improve prediction accuracy by capturing temporal and spatial correlations. Experimental results demonstrate the superiority of VASTN on real-world data.
COMPUTER SYSTEMS SCIENCE AND ENGINEERING
(2022)
Article
Energy & Fuels
Lars Odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: To improve wind energy production, short-term forecasting is crucial. This study focuses on multi-step spatio-temporal wind speed forecasting, considering 14 offshore measurement stations and leveraging spatial dependencies to improve local wind forecasts. By comparing various neural network models, the study found that models using altered Transformer architectures outperformed LSTM and MLP models. The FFTransformer and Autoformer achieved superior results for different forecast horizons.
Article
Green & Sustainable Science & Technology
Hang Chen, Shanbi Wei, Wei Yang, Shanchao Liu
Summary: With the increasing scale and power of wind turbines, the wake effect in wind farms becomes more evident. This study proposes a method to predict the input wind speed of downstream wind turbines in real time using data from upstream wind turbines. By mapping mechanical anemometers to Lidar, the prediction accuracy is improved.
Article
Automation & Control Systems
Yingnan Zhao, Peiyuan Ji, Fei Chen, Guanlan Ji, Sunil Kumar Jha
Summary: This paper introduces a spatio-temporal model VCGA based on VMD and attention mechanism, which effectively extracts spatial features and captures temporal dependencies, outperforming prior algorithms in short-term wind power prediction experiments.
INTELLIGENT AUTOMATION AND SOFT COMPUTING
(2022)
Article
Computer Science, Artificial Intelligence
Peng Xie, Minbo Ma, Tianrui Li, Shenggong Ji, Shengdong Du, Zeng Yu, Junbo Zhang
Summary: This paper presents a spatio-temporal dynamic graph relational learning model for predicting urban metro station flow. The model captures the traffic patterns of different stations using a node embedding representation module, learns dynamic spatial relationships between metro stations through a dynamic graph relationship learning module, and utilizes a transformer for long-term relationship prediction. Experimental results demonstrate the advantages of our method in urban metro flow prediction.
IEEE TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING
(2023)
Article
Computer Science, Information Systems
Aite Zhao, Junyu Dong, Jianbo Li, Lin Qi, Huiyu Zhou
Summary: This study establishes an automated learning system for gait recognition using multi-sensor datasets and ASTCapsNet, and validates its effectiveness on various public datasets.
IEEE TRANSACTIONS ON MULTIMEDIA
(2022)
Article
Green & Sustainable Science & Technology
Tao Wu, Huiqing Shen, Jianxin Qin, Longgang Xiang
Summary: This study proposes a novel method to identify stops from GPS trajectories by representing the spatio-temporal dynamics relationship between stopping behaviors and geospatial elements. Experiments have shown the effectiveness of this approach in improving the accuracy of stop identification from trajectories.
Article
Biology
Manfu Ma, Xiaoming Zhang, Yong Li, Xia Wang, Ruigen Zhang, Yang Wang, Penghui Sun, Xuegang Wang, Xuan Sun
Summary: In this study, we propose the ConvLSTM coordinated longitudinal Transformer (LCTformer) for tumor growth prediction based on spatiotemporal features, including the Adaptive Edge Enhancement Module (AEEM), Growth Prediction Module (GPM), and Channel Enhancement Fusion Module (CEFM). The model achieves an average prediction accuracy of 88.52% (Dice score), 89.64% (Recall), and 11.06 (RMSE) on the NLST dataset, improving the efficiency of doctors' work.
COMPUTERS IN BIOLOGY AND MEDICINE
(2023)
Article
Computer Science, Interdisciplinary Applications
Kun Zheng, Yuyao Ci, Hongyu Liu, Jinbiao Zhang
Summary: Windstorm, as a serious meteorological natural disaster, has caused significant harm to people's lives and property. Understanding the spatio-temporal features of windstorms through visualization is crucial for predicting storm activities and engaging in related work. The proposed spatio-temporal visualization method in this study offers unique advantages in recognizing wind features and describing their continuous process evolution over time compared to other wind visualization tools.
COMPUTATIONAL GEOSCIENCES
(2021)
Article
Engineering, Electrical & Electronic
Jie Liu, Yijia Cao, Yong Li, Yixiu Guo, Wei Deng
Summary: In this paper, the historical network loss is calculated using cleaned historical data and machine learning technologies are used to analyze the loss of distribution network and predict future loss. The experimental results show that the data cleaning methods and improved algorithms are effective for enhancing prediction accuracy.
INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS
(2023)
Article
Automation & Control Systems
Fang Liu, Haitao Liu, Yong Li, Denis Sidorov
Summary: This paper proposes two relaxed negative-determination lemmas to deduce the negative definite condition of a quadratic function with respect to a time-varying delay. The developed lemmas are applied to derive the stability criteria for nominal and uncertain systems, and numerical examples are given to demonstrate their potential advantages and superiority over previous work.
Article
Engineering, Multidisciplinary
Jinjie Lin, Sixiang Lin, Yong Li, Sijia Hu, Jing Zhang, Jie Zhang, Bonan An, Zhiwen Zhang, Bin Xie, Fangyuan Zhou, Yang Cao, Jiahua Yu
Summary: This paper proposes an energy storage-based railway power flow controller (ES-RPFC) with partial compensation strategy (PCS) to improve grid-connection performance and utilize regenerative braking energy (RBE). The relationship between primary power factor (PF), two-phase compensated power, and converters' rating is investigated, and a PCS is developed to reduce converters' rating while satisfying grid-connection indices. A comprehensive power-flow management scheme is then established, considering the developed PCS, and the control strategy of the converter-level controller is provided. Simulation and hardware-in-loop (HIL) experimental results confirm the feasibility and effectiveness of the proposal.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Shaoyang Wang, Yong Li, Mingmin Zhang, Yanjian Peng, Ye Tian, Gang Lin, Fanrui Chang
Summary: This article presents a novel scheme of using the inductive power filtering method (IPFM) to solve the harmonic resonance issues in large-scale photovoltaic (PV) plants, taking actual engineering as a case study. The performance of power filters is improved by reshaping the impedance network of the PV plant using the special structure and dual zero-impedance design of IPFM, thus suppressing the harmonic resonance caused by the interaction between inverters and the power grid. The topology and components of the IPFM-based large-scale PV plant are introduced, and the mathematical model and simplified circuit are established. The feasibility of the proposal is verified through simulation and engineering tests.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Qiang Ou, Longfu Luo, Yong Li, Yantao Lin, Ye Tian
Summary: This paper proposes a reliability evaluation method based on dynamic relative displacement (DRDEM) for investigating the spatial differences and time effects of short-circuit faults in extra-high voltage (EHV) transformers. The appropriate and efficient analysis method is summarized by comparing the deviation among different calculated impedances and the measured value. The space-time effect of windings is obtained using the static magnetic field and dynamic structural field based on equivalent compression supports. The destructive short-circuit test on a 50 MVA/110 kV transformer confirms the adaptability of DRDEM in characterizing the winding ability to withstand short circuit when investigating the spatial differences and time effects.
IET GENERATION TRANSMISSION & DISTRIBUTION
(2023)
Article
Engineering, Electrical & Electronic
Ye Tian, Longfu Luo, Yong Li, Qianyi Liu, Shaoyang Wang, Zhao Huang, Jinjie Lin
Summary: This paper presents the design and implementation of a dual harmonic balanced configuration transformer (DHBCT) that achieves harmonic multi-port isolation. The filtering mechanism and electromagnetic decoupling model are demonstrated, and fault analysis is investigated to verify the proposed method.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2023)
Article
Green & Sustainable Science & Technology
Junjie Zhong, Yong Li, Yijia Cao, Yi Tan, Yanjian Peng, Yicheng Zhou, Yosuke Nakanishi, Zhengmao Li
Summary: This paper proposes a distributed scheduling method for the coordination between multi-energy microgrid and distribution network under operational uncertainties. The method combines column and constraint generation algorithm, multi-interval convex hull uncertainty set, and Bregman alternating direction method with multipliers to improve convergence. Simulation tests on IEEE-33 node distribution network and a park-level microgrid demonstrate the effectiveness of the proposed model and method.
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
(2023)
Article
Computer Science, Information Systems
Qiang Ou, Longfu Luo, Yong Li, Ying Li, Jinwen Xiang
Summary: Power transformers are susceptible to external short circuit impact during operation, which can cause winding destabilization and collapse. The traditional analytical methods ignore the manufacturing deviation and operation impact. To overcome this limitation, the paper proposes the equivalent support stiffness (ESS) analytical method, which considers the effects of assembly gaps and insulation shrinkage. The feasibility of the ESS method is demonstrated through short-circuit tests on two transformers.
Article
Engineering, Electrical & Electronic
Li Jiang, Yao Sun, Yong Li, Zhongting Tang, Fulin Liu, Yongheng Yang, Mei Su, Yijia Cao
Summary: This article extensively explores the dual-active-bridge (DAB) dc-dc converter with phase shift control, and comparatively analyzes the optimum performances achieved with different objectives in each mode. The principle and operating modes of TPS control are introduced in detail, followed by the systematic derivation of the electrical characteristics of the converter in each operating mode. The analysis includes resonant commutation in each dead-band and the identification of the soft-switching areas of the converter. Optimization objectives such as zero-voltage switching (ZVS), peak and root mean square (rms) of the inductor current, backflow power, and operating losses are considered, and the optimized results are contrastively analyzed.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Zhongxiang Li, Yanghong Tan, Yong Li, Xian Yang, Zhonghuan Su, Jun Liu, Shaoyang Wang, Yuankai Wang
Summary: This paper introduces the calculation and evaluation method of radial stability of transformers under short-circuit condition, and verifies it through experiments. The experimental results show that the evaluation method is accurate with a deviation of less than 5%, and the accumulation of short-circuit current can accurately determine the critical radial instability state of the transformer. The tests also confirm the existence of short-circuit cumulative effect in a transformer.
ELECTRIC POWER SYSTEMS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Qianyi Liu, Fang Liu, Yong Li, Shuzheng Wang
Summary: The research first introduces the tested 110 kV/23 MVA power supply system and the harmonic distribution at PCC. Multiple probability distribution functions are used to fit the background harmonic, and the optimal fitting function is selected. A simulation model of harmonic voltage is generated based on the selected fitting function. The harmonic contribution is determined using the superposition rule and the simulation model. The proposed method can be an alternative for harmonic contribution determination in engineering practice.
ELECTRIC POWER SYSTEMS RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Fang Liu, Jianghu Wan, Li Jiang, Yong Li, Kang-Zhi Liu
Summary: This article presents a soft-switching full-bridge AC-DC converter with a simple active auxiliary branch. The converter achieves zero voltage switching and zero current switching conditions through the use of auxiliary switches and inductors. A clamping technique is employed to mitigate the voltage stresses caused by resonance. The proposed converter demonstrates high efficiency and outstanding performance.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Yahui Wang, Yong Li, Yijia Cao, Mohammad Shahidehpour, Lin Jiang, Yilin Long, Youyue Deng, Weiwei Li
Summary: Since the AS market is not fully open for MEMG, the potential of MEMG as a VPP has not been thoroughly explored. This study proposes an optimal operation strategy for MEMG participating in AS, and validates its feasibility through a practical MEMG in China.
IEEE TRANSACTIONS ON SMART GRID
(2023)
Article
Green & Sustainable Science & Technology
Junjie Zhong, Yong Li, Yan Wu, Yijia Cao, Zhengmao Li, Yanjian Peng, Xuebo Qiao, Yong Xu, Qian Yu, Xusheng Yang, Zuyi Li, Mohammad Shahidehpour
Summary: This paper proposes a low-carbon operation model for an energy hub (EH) by combining the distributionally robust optimization (DRO) method with the Stackelberg game. The model incorporates a bilevel single-leader-multi-follower Stackelberg game and a Kullback-Leibler (KL) divergence-based DRO model to handle the uncertainty of renewable generation in the EH. The proposed method is validated through numerical case studies.
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
(2023)
Article
Mathematics, Applied
Nikolay Sidorov, Denis Sidorov, Yong Li
Summary: This article studies the system of differential and operator equations and presents the conditions for the existence of equilibrium points. The solution can be constructed using the method of successive approximations, and the main theorem provides conditions for the existence and stability of global classical solutions. If the conditions are not satisfied, there may be explosive solutions or solutions that stabilize to equilibrium points. These equation systems can model nonlinear phenomena in power systems and chemical processes.
DIFFERENTIAL EQUATIONS AND DYNAMICAL SYSTEMS
(2023)
Article
Green & Sustainable Science & Technology
Cameron Bracken, Nathalie Voisin, Casey D. Burleyson, Allison M. Campbell, Z. Jason Hou, Daniel Broman
Summary: This study presents a methodology and dataset for examining compound wind and solar energy droughts, as well as the first standardized benchmark of energy droughts across the Continental United States (CONUS) for a 2020 infrastructure. The results show that compound wind and solar droughts have distinct spatial and temporal patterns across the CONUS, and the characteristics of energy droughts are regional. The study also finds that compound high load events occur more often during compound wind and solar droughts than expected.
Article
Green & Sustainable Science & Technology
Ning Zhang, Yanghao Yu, Jiawei Wu, Ershun Du, Shuming Zhang, Jinyu Xiao
Summary: This paper provides insights into the optimal configuration of CSP plants with different penetrations of wind power by proposing an unconstrained optimization model. The results suggest that large solar multiples and TES are preferred in order to maximize profit, especially when combined with high penetrations of wind and photovoltaic plants. Additionally, the study demonstrates the economy and feasibility of installing electric heaters (EH) in CSP plants, which show a linear correlation with the penetration of variable energy resources.
Article
Green & Sustainable Science & Technology
M. Szubel, K. Papis-Fraczek, S. Podlasek
Article
Green & Sustainable Science & Technology
J. Silva, J. C. Goncalves, C. Rocha, J. Vilaca, L. M. Madeira
Summary: This study investigated the methanation of CO2 in biogas and compared two different methanation reactors. The results showed that the cooled reactor without CO2 separation achieved a CO2 conversion rate of 91.8%, while the adiabatic reactors achieved conversion rates of 59.6% and 67.2%, resulting in an overall conversion rate of 93.0%. Economic analysis revealed negative net present worth values, indicating the need for government monetary incentives.
Article
Green & Sustainable Science & Technology
Yang Liu, Yonglan Xi, Xiaomei Ye, Yingpeng Zhang, Chengcheng Wang, Zhaoyan Jia, Chunhui Cao, Ting Han, Jing Du, Xiangping Kong, Zhongbing Chen
Summary: This study investigated the effect of using nanofiber membrane composites containing Prussian blue-like compound nanoparticles (PNPs) to relieve ammonia nitrogen inhibition of rural organic household waste during high-solid anaerobic digestion and increase methane production. The results showed that adding NMCs with 15% PNPs can lower the concentrations of volatile fatty acids and ammonia nitrogen, and increase methane yield.
Article
Green & Sustainable Science & Technology
Zhong Ge, Xiaodong Wang, Jian Li, Jian Xu, Jianbin Xie, Zhiyong Xie, Ruiqu Ma
Summary: This study evaluates the thermodynamic, exergy, and economic performance of a double-stage organic flash cycle (DOFC) using ten eco-friendly hydrofluoroolefins. The influences of key parameters on performance are analyzed, and the advantages of DOFC over single-stage type are quantified.
Article
Green & Sustainable Science & Technology
Nicolas Kirchner-Bossi, Fernando Porte-Agel
Summary: This study investigates the optimization of power density in wind farms and its sensitivity to the available area size. A novel genetic algorithm (PDGA) is introduced to optimize power density and turbine layout. The results show that the PDGA-driven solutions significantly reduce the levelized cost of energy (LCOE) compared to the default layout, and exhibit a convex relationship between area and LCOE or power density.
Article
Green & Sustainable Science & Technology
Chunxiao Zhang, Dongdong Li, Lin Wang, Qingpo Yang, Yutao Guo, Wei Zhang, Chao Shen, Jihong Pu
Summary: In this study, a novel reversible liquid-filled energy-saving window that effectively regulates indoor solar radiation heat gain is proposed. Experimental results show that this window can effectively reduce indoor temperature during both summer and winter seasons, while having minimal impact on indoor illuminance.
Article
Green & Sustainable Science & Technology
Alessandro L. Aguiar, Martinho Marta-Almeida, Mauro Cirano, Janini Pereira, Leticia Cotrim da Cunha
Summary: This study analyzed the Brazilian Equatorial Shelf using a high-resolution ocean model and found significant tidal variations in the area. Several hypothetical barrages were proposed with higher annual power generation than existing barrages. The study also evaluated the installation effort of these barrages.
Article
Green & Sustainable Science & Technology
Francesco Superchi, Nathan Giovannini, Antonis Moustakis, George Pechlivanoglou, Alessandro Bianchini
Summary: This study focuses on the optimization of a hybrid power station on the Tilos island in Greece, aiming to increase energy export and revenue by optimizing energy fluxes. Different scenarios are proposed to examine the impact of different agreements with the grid operator on the optimal solution.
Article
Green & Sustainable Science & Technology
Peimaneh Shirazi, Amirmohammad Behzadi, Pouria Ahmadi, Sasan Sadrizadeh
Summary: This research presents two novel energy production/storage/usage systems to reduce energy consumption and environmental effects in buildings. A biomass-fired model and a solar-driven system integrated with photovoltaic thermal (PVT) panels and a heat pump were designed and assessed. The results indicate that the solar-based system has an acceptable energy cost and the PVT-based system with a heat pump is environmentally superior. The biomass-fired system shows excellent efficiency.
Article
Green & Sustainable Science & Technology
Zihao Qi, Yingling Cai, Yunxiang Cui
Summary: This study aims to investigate the operational characteristics of the solar-ground source heat pump system (SGSHPS) in Shanghai under different operation modes. It concludes that tandem operation mode 1 is the optimal mode for winter operation in terms of energy efficiency.
Article
Green & Sustainable Science & Technology
L. Bartolucci, S. Cordiner, A. Di Carlo, A. Gallifuoco, P. Mele, V. Mulone
Summary: Spent coffee grounds are a valuable biogenic waste that can be used as a source of biofuels and valuable chemicals through pyrolysis and solvent extraction processes. The study found that heavy organic bio-oil derived from coffee grounds can be used as a carbon-rich biofuel, while solvent extraction can extract xantines and p-benzoquinone, which are important chemicals for various industries. The results highlight the promising potential of solvent extraction in improving the economic viability of coffee grounds pyrolysis-based biorefineries.
Article
Green & Sustainable Science & Technology
Luiza de Queiroz Correa, Diego Bagnis, Pedro Rabelo Melo Franco, Esly Ferreira da Costa Junior, Andrea Oliveira Souza da Costa
Summary: Building-integrated photovoltaics, especially organic solar technology, are important for reducing greenhouse gas emissions in the building sector. This study analyzed the performance of organic panels laminated in glass in a vertical installation in Latin America. Results showed that glass lamination and vertical orientation preserved the panels' performance and led to higher energy generation in winter.
Article
Green & Sustainable Science & Technology
Zhipei Hu, Shuo Jiang, Zhigao Sun, Jun Li
Summary: This study proposes innovative fin arrangements to enhance the thermal performance of latent heat storage units. Through optimization of fin distribution and prediction of transient melting behaviors, it is found that fin structures significantly influence heat transfer characteristics and melting behaviors.