Article
Energy & Fuels
Dejin Fan, Shu Zhang, He Huang, Liping Zhou, Yang Wang, Xianyong Xiao
Summary: This paper proposes a three-stage scheduling strategy for regional aggregators to participate in day-ahead scheduling for demand response. The strategy considers the profit of aggregators, peak load, line loss, and voltage deviation to ensure stable operation of the power grid, fairness of regulation, and user comfort. A single temperature adjustment strategy is used to control thermostatically controlled loads (TCLs) for maximizing the response potential. Digital simulation based on the IEEE 33-bus distribution network system confirms the effectiveness of the proposed strategy in maintaining voltage deviation within +/- 5%, increasing the Gini coefficient by 20%, and reducing the predicted percentage of dissatisfied users by 48% compared to no distribution.
PROTECTION AND CONTROL OF MODERN POWER SYSTEMS
(2023)
Article
Thermodynamics
Zhaoming Liu, Guofeng Chang, Hao Yuan, Wei Tang, Jiaping Xie, Xuezhe Wei, Haifeng Dai
Summary: This study presents an improved model predictive control (MPC) strategy for the thermal management of vehicular fuel cells. By incorporating model adaptation, look-ahead information utilization, and temperature trajectory planning, the temperature control effectiveness and energy-saving capabilities of fuel cells are improved.
Article
Engineering, Electrical & Electronic
Jiahao Yan, Bo Hu, Kaigui Xie, Tao Niu, Chunyan Li, Heng-Ming Tai
Summary: This paper addresses the dynamic repair scheduling of electric power transmission systems using a look-ahead strategy to minimize functionality loss during the restoration stage. By balancing approximated functionality loss at different decision stages with stage-dependent coefficients, a tradeoff between efficiency and optimality can be achieved.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2021)
Article
Energy & Fuels
Chen Changqing, Li Xinran, Liu Xiaolong, Yang Yang
Summary: An advanced energy storage (ES) control strategy based on wind speed prediction is proposed to improve the FM reliability of wind turbines, considering the wind speed fluctuation and prediction error. The strategy involves modifying charging and discharging behaviors based on future wind speed forecasts and optimizing the dynamic state of charge (SOC) of the energy storage system to enhance FM capability at different wind speeds. Simulation results demonstrate an improvement in frequency deviation and system stability under continuous perturbations.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Computer Science, Interdisciplinary Applications
Meziane Aider, Fatma Zohra Baatout, Mhand Hifi
Summary: This paper investigates a method for scheduling multiprocessor tasks by combining a look-ahead strategy with path-relinking. The method starts with a greedy feasible solution built through a knapsack rule and incorporates various local and diversification strategies to optimize the search process. Experimental analysis is used to compare the method's performance with other recent methods in the literature.
COMPUTERS & INDUSTRIAL ENGINEERING
(2021)
Article
Engineering, Mechanical
Sai Zhang, Xinjun Liu, Bingkai Yan, Jie Bi, Xiangdong Han
Summary: This paper proposes a real-time look-ahead algorithm to improve precision and minimize damage in the machining of complex curved workpieces. The algorithm includes path-smoothing, trajectory planning, and bidirectional scanning modules. The feasibility of the algorithm is verified through simulations and experiments, and high precision can be achieved by adjusting parameters.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2023)
Article
Automation & Control Systems
Yang Xu, Zheng Wang, Pengcheng Liu, Zhixiang Zou, Huafeng Xiao
Summary: This article proposes a soft-switching isolated grid inverter based on the current-fed matrix-type configuration, which achieves soft switching of the inverter through the combination of a current-fed H-bridge and a direct matrix converter. The converter has the ability to smooth the dc-source current and prolong the system's life.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Bala Kameshwar Poolla, Ashish R. Hota, Saverio Bolognani, Duncan S. Callaway, Ashish Cherukuri
Summary: This study addresses the problem of look-ahead economic dispatch with uncertain renewable energy generation by proposing two data-driven methods, one based on conditional-value-at-risk in convex optimization and the other on scalable robust optimization. Numerical experiments demonstrate the effectiveness of these methods in real-world scenarios.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2021)
Article
Business
Lagnajita Chatterjee, Cong Feng, Cheryl Nakata, K. Sivakumar
Summary: This article reviews and analyzes the importance of environmental turbulence in the field of marketing. Through a systematic review of marketing literature, the interpretation, measurement, empirical effects, and nomological networks of turbulence are determined. Based on the findings, a two-pronged research pathway is proposed to enhance the utility of the turbulence concept and strengthen marketing knowledge and practice.
JOURNAL OF BUSINESS RESEARCH
(2023)
Article
Genetics & Heredity
Zheng Ni, Saba Moeinizade, Aaron Kusmec, Guiping Hu, Lizhi Wang, Patrick S. Schnable
Summary: This article studies the potential advantages of incorporating intercrossing into trait introgression programs when compared with relying solely on the traditional backcrossing framework. Simulations demonstrate that the inclusion of intercrossing in a trait introgression program can substantially increase efficiency and the probability of success.
G3-GENES GENOMES GENETICS
(2023)
Article
Computer Science, Information Systems
Hossein Mehdipourpicha, Rui Bo
Summary: Virtual bidding allows financial players and physical market participants to take advantage of opportunities in electricity markets. A bi-level optimization model is proposed to help physical market participants maximize profits by leveraging both physical assets and virtual transactions. Through case studies, it is shown that physical market participants may deploy virtual transactions in a different way than purely financial players.
Article
Engineering, Electrical & Electronic
Young-Dal Lee, Gun-Woo Moon, Jaeil Baek, Chong-Eun Kim
Summary: This article presents a reconfigurable totem-pole bridgeless power factor correction converter employing an auxiliary circuit and a simple control scheme to achieve high efficiency. The converter utilizes auxiliary switches under light load condition for higher efficiency, while maintaining zero-voltage switching operation and relieving reverse-recovery problem under middle-to-heavy load condition with the help of the auxiliary circuit. The effectiveness of the converter is verified by a prototype with ac 230V(rms) input and 750W output.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Tao Ding, Ming Qu, Zekai Wang, Bo Chen, Chen Chen, Mohammad Shahidehpour
Summary: A three-stage resilient unit commitment model is proposed to enhance the power system's resilience against typhoon events by considering uncertainty in typhoon paths and line outages. Resources are coordinated based on worst-case scenarios for each possible typhoon path, involving preventive control, emergency control, and restoration stages. The model is tested on the IEEE 118-bus system and a real-world provincial system to validate its effectiveness.
IEEE TRANSACTIONS ON SMART GRID
(2021)
Article
Thermodynamics
Alberto Broatch, Benjamin Pla, Pau Bares, Augusto Perin
Summary: To improve the efficiency and range of electric vehicles, a prediction-based controller algorithm is proposed to estimate future energy demands and optimize battery temperature. Experimental results show that this method can reduce energy consumption by minimizing the use of battery heater.
APPLIED THERMAL ENGINEERING
(2023)
Article
Automation & Control Systems
Xin Guo, Hai-Peng Ren
Summary: This article introduces a new current switching control strategy for three-phase VSRs, which accurately describes the physical working principle of the converter under unbalanced grid conditions, has a simple control structure, is not sensitive to circuit parameters, and improves the robustness of the control system.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Wandry R. Faria, Gregorio Munoz-Delgado, Javier Contreras, Benvindo R. Pereira Jr
Summary: This paper proposes a new bilevel mathematical model for competitive electricity markets, taking into account the participation of distribution systems operators. A new pricing method is introduced as an alternative to the inaccessible dual variables of the transmission system.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Chao Zhang, Liwei Zhang, Dong Wang, Kaiyuan Lu
Summary: The load disturbance rejection ability of electrical machine systems is crucial in many applications. Existing studies mainly focus on improving disturbance observers, but the speed response control during the transient also plays a significant role. This paper proposes a sliding mode disturbance observer-based load disturbance rejection control with an adaptive filter and a Smith predictor-based speed filter delay compensator to enhance the transient speed response.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Arif Hussain, Arif Mehdi, Chul-Hwan Kim
Summary: The proposed scheme in this research paper is a communication-less islanding detection system based on recurrent neural network (RNN) for hybrid distributed generator (DG) systems. The scheme demonstrates good performance in feature extraction, feature selection, and islanding detection, and it also performs effectively in noisy environments.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Zonghui Sun, Xizheng Guo, Shinan Wang, Xiaojie You
Summary: This paper presents a status pre-matching method (SPM) that eliminates the iterative calculations for resistance switch model, and simulates all operation modes of PECs through a more convenient approach. Furthermore, a FPGA implementation scheme is proposed to fully utilize the multiplier units of FPGA.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Rui Zhou, Shuheng Chen, Yang Han, Qunying Liu, Zhe Chen, Weihao Hu
Summary: In power system scheduling with variable renewable energy sources, considering both spatial and temporal correlations is a challenging task due to the complex intertwining of spatiotemporal characteristics and computational complexity caused by high dimensionality. This paper proposes a novel probabilistic spatiotemporal scenario generation (PSTSG) method that generates probabilistic scenarios accounting for spatial and temporal correlations simultaneously. The method incorporates Latin hypercube sampling, copula-importance sampling theory, and probability-based scenario reduction technique to efficiently capture the spatial and temporal correlation in the dynamic optimal power flow problem. Numerical simulations demonstrate the superiority of the proposed approach in terms of computational efficiency and accuracy compared to existing methods.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Juan Manuel Mauricio, J. Carlos Olives-Camps, Jose Maria Maza-Ortega, Antonio Gomez-Exposito
Summary: This paper proposes a simplified thermal model of VSC, which can produce accurate results at a low computational cost. The model consists of a simple first-order thermal dynamics system and two quadratic equations to model power losses. A methodology is also provided to derive the model parameters from manufacturer data.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Jae-Kyeong Kim, Kyeon Hur
Summary: This paper investigates the relationship between the accuracy of finite difference-based trajectory sensitivity (FDTS) analysis and the perturbation size in non-smooth systems. The study reveals that the approximation accuracy is significantly influenced by the perturbation size, and linear approximation is the most suitable method for practical applications.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Yuan Si, Amjad Anvari-Moghaddam
Summary: This paper investigates the impact of geomagnetic disturbances on small signal stability in power systems and proposes the installation of blocking devices to mitigate the negative effects. Quantitative evaluation reveals that intense geomagnetic disturbances significantly increase the risk of small signal instability. Optimal placement of blocking devices based on sensitivity scenarios results in a significant reduction in the risk index compared to constant and varying induced geoelectric fields scenarios.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Xuejian Zhang, Wenxin Kong, Nian Yu, Huang Chen, Tianyang Li, Enci Wang
Summary: The intensity estimation of geomagnetically induced currents (GICs) varies depending on the method used. The estimation using field magnetotelluric (MT) data provides the highest accuracy, followed by the estimation using 3D conductivity models and the estimation using a 1D conductivity model. The GICs in the North China 1000-kV power grid have reached a very high-risk level, with C3 and C4 having a significant impact on the geoelectric field and GICs.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Yue Pan, Shunjiang Lin, Weikun Liang, Xiangyong Feng, Xuan Sheng, Mingbo Liu
Summary: This paper introduces the concept and model of offshore-onshore regional integrated energy system, and proposes a stochastic optimal dispatch model and an improved state-space approximate dynamic programming algorithm to solve the model. The case study demonstrates the effectiveness and high efficiency of the proposed method in improving economic and environmental benefits.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Mohammad Eydi, Reza Ghazi, Majid Oloomi Buygi
Summary: Proportional current sharing, voltage restoration, and SOCs balancing in DC microgrid control algorithms are the leading challenges. This paper proposes a novel communication-less control method using a capacitor and a DC/DC converter to stabilize the system and restore the DC bus voltage. The method includes injecting an AC signal into the DC bus, setting the current of energy storage units based on frequency and SOC, and incorporating droop control for system stability. Stability analysis and simulation results validate the effectiveness of the proposed method.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Xiangjian Meng, Xinyu Shi, Weiqi Wang, Yumin Zhang, Feng Gao
Summary: With the increasing penetration of photovoltaic power generation, regional power forecasting becomes critical for stable and economical operation of power systems. This paper proposes a minute-level regional PV power forecasting scheme using selected reference PV plants. The challenges include the lack of complete historical power data and the heavy computation burden. The proposed method incorporates a novel reference PV plant selection method and a flexible approach to decrease the accumulated error of rolling forecasting.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Huabo Shi, Yuhong Wang, Xinwei Sun, Gang Chen, Lijie Ding, Pengyu Pan, Qi Zeng
Summary: This article investigates the dynamic stability characteristics of the full size converter variable speed pumped storage unit and proposes improvements for the control strategy. The research is important for ensuring the safe and efficient operation of the unit.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Firmansyah Nur Budiman, Makbul A. M. Ramli, Houssem R. E. H. Bouchekara, Ahmad H. Milyani
Summary: This paper proposes an optimal harmonic power flow framework for the daily scheduling of a grid-connected microgrid, which addresses power quality issues and ensures effective control through demand side management.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)
Article
Engineering, Electrical & Electronic
Cong Zeng, Ziyu Chen, Jizhong Zhu, Fellew Ieee
Summary: This paper introduces a distributed solution method for the multi-objective OPF problem, using a coevolutionary multi-objective evolutionary algorithm and the idea of decomposition. The problem is alleviated by decomposing decision variables and objective functions, and a new distributed fitness evaluation method is proposed. The experimental results demonstrate the effectiveness of the method and its excellence in large-scale systems.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2024)