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State Evaluation Based on Feature Identification of Measurement Data:for Resilient power System

CSEE Journal of power and Energy Systems 2022年第4期8卷 983-992页

作者： Hongxia Wang Bo Wang Peng Luo Fuqi Ma Yinyu Zhou Mohamed A.Mohamed School of Electrical Engineering and Automation Wuhan UniversityWuhan 430074China Huizhou Power Supply Bureau Co. Ltd.Huizhou516001Guangdong ProvinceChina Electrical Engineering Department Faculty of EngineeringMinia UniversityMinia 61519Egypt

Resilient power systems urgently need real-time evaluation of their operational *** mining the characteristics of the grid operational data and mapping them to the operational state,this paper proposes a method to evaluate the real-time state and the evolution direction of power ***,the state evaluation matrix is constructed using nodal ***,from the data-driven perspective,the grid state is embodied in the operational data ***,four indicators are proposed to characterize the power grid statefrom inherent physical and operating characteristics ***,through the simulations of a real power grid in China,it is shown that the method proposed in this paper can adequately characterize the power grid state,and is robust against bad data.

关键词： Data characteristics evolution direction random matrix theory real-time evaluation resilient power system

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Research on optimal scheduling of virtual power plant considering demand response under carbon-green certificate trading mechanism 5

Research on optimal scheduling of virtual power plant consid...

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2024 5th International Conference on Electrical, Electronic Information and Communication engineering, EEICE 2024

作者： Yi, Yingmin Zhou, Dingsong Yuan, Yiwei Yu, Yongjun Faculty of Automation and Information Engineering Xi'An University of Technology Shaanxi Xian710048 China Electric Power Research Institute State Grid Xinjiang Electric Power Co. Ltd. Xinjiang Urumqi830000 China

With the increasingly serious environmental problems and the randomness of wind-power output, the virtual power plant (VPP) has a positive significance for realizing the dual carbon goal and promoting the stable operation of the power system. To minimize the cost and the carbon emission of VPP operation, this paper proposes a VPP optimal dispatching model considering demand response (DR) under the carbon-green certificate trading mechanism. Firstly, the VPP operation architecture, which can meet various load requirements of electric heating and cooling, is established, and each component equipment of the system is modeled. Afterward, the price and alternative demand response models are constructed, respectively, and the carbon trading (CT) and green certificate trading (GCT) models are analyzed. Then, considering energy purchase cost, system maintenance cost, and carbon-green certificate trading cost, a low-carbon economic dispatching model is formulated to minimize the operational costs of the VPP throughout the dispatching cycle. Finally, the optimization model is solved;the total operating cost of the VPP under this model is 16633.15 yuan, and the carbon emission is 6094.75 kg. Experimental results prove that this optimized model can reduce system operational costs while simultaneously considering environmental benefits. © Published under licence by IOP Publishing Ltd.

关键词： Demand response

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Study on optimization of multi-UAV nucleic acid sample delivery paths in large cities under the influence of epidemic environment

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Journal of Ambient Intelligence and Humanized Computing 2023年第6期14卷 7593-7620页

作者： Han, Yuhang Xiang, Hongyu Cao, Jianing Yang, Xiaohua Pan, Nan Huang, Linhai Mechanical Engineering Faculty of Civil Aviation and Aeronautics Kunming University of Science and Technology Yunnan China Computer Science and Technology Metrology Center Yunnan Power Grid Co. Ltd. Yunnan China Computer Science and Technology Faculty of Information Engineering and Automation Kunming University of Science and Technology Yunnan China

In the context of global novel coronavirus infection, we studied the distribution problem of nucleic acid samples, which are medical supplies with high urgency. A multi-UAV delivery model of nucleic acid samples with time windows and a UAV (Unmanned Aerial Vehicle) dynamics model for multiple distribution centers is established by considering UAVs’ impact cost and trajectory cost. The Golden Eagle optimization algorithm (SGDCV-GEO) based on gradient optimization and Corsi variation is proposed to solve the model by introducing gradient optimization and Corsi variation strategy in the Golden Eagle optimization algorithm. Performance evaluation by optimizing test functions, Friedman and Nemenyi test compared with Golden Jackal Optimization (GJO), Hunter-Prey Optimization (HPO), Pelican Optimization Algorithm (POA), Reptile Search Algorithm (RSA) and Golden Eagle Optimization (GEO), the convergence performance of SGDCV-GEO algorithm was demonstrated. Further, the improved RRT (Rapidly-exploring Random Trees) algorithm is used in the UAV path planning, and the pruning process and logistic chaotic mapping strategy are introduced in the path generation method. Finally, simulation experiments are conducted based on 8 hospitals and 50 randomly selected communities in the Pudong district of Shanghai, southern China. The experimental results show that the developed algorithm can effectively reduce the delivery cost and total delivery time compared with simulated annealing algorithm (SA), crow search algorithm (CSA), particle swarm algorithm (PSO), and taboo search algorithm (TS), and the developed algorithm has good uniformity, robustness, and high convergence accuracy, which can be effectively applied to the multi-UAV nucleic acid sample delivery path optimization in large cities under the influence of an epidemic environment. © 2023, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： COVID-19

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Output Current Pulsation Reduction with Multi-coil Receiver in the Dynamic Wireless Charging Systems for Electric Vehicles 12

Output Current Pulsation Reduction with Multi-coil Receiver ...

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12th IEEE International Conference on Control, automation and Information Sciences, ICCAIS 2023

作者： Hiep, Tran Duc Minh, Nguyen Huu Diep, Nguyen Thi Minh, Tran Trong Trung, Nguyen Kien Hanoi University of Science and Technology School of Electrical and Electronic Engineering Viet Nam Hanoi University of Industry Faculty of Electrical Engineering Viet Nam Electric Power University Faculty of Control and Automation Viet Nam

ISBN: (纸本)9798350328783

Dynamic wireless charging (DWC) systems for electric vehicles are an important solution for electric vehicles to be used more commonly in the future. However, when the electric vehicle is moving and charging in the DWC lane, the charging current is pulsated. This charging current pulse will affect the battery life. This paper proposes a multi-coil receiver structure to reduce the pulsation of the output current. The proposal has been verified by simulation and experimental results, the output current pulsation achieved is 3.1%. © 2023 IEEE.

关键词： Electric vehicles

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An Investigation of the Energy Efficiency of a Grid Connected Photovoltaic System 8

An Investigation of the Energy Efficiency of a Grid Connecte...

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8th International Conference on Energy Efficiency and Agricultural engineering, EE and AE 2022

作者： Koev, Konstantin University of Ruse "angel Kanchev" Electrical Engineering Electronics and Automation Faculty Electrical Power Engineering Department Ruse Bulgaria

ISBN: (纸本)9781665407090

A photovoltaic system installed on the roof of an industrial site has been studied. The total maximal installed power of the system is 117.24 kWp. Poly- and mono-crystalline photovoltaic modules have been used. The energy efficiency of the system has been studied through the changes of the performance ratio (PR) and of the energy efficiency coefficient (efficiency) for a period of 8 years and 9 months (105 months - from January 2009 to and including September 2017). It has been found out that the changes in the values of PR and efficiency over the years are insignificant. Studies on photovoltaic modules in operational conditions show that polycrystalline ones are more efficient than mono-crystalline ones during the summer periods when the minimal values of efficiency and PR are observed. Their differences for the two types of modules remain almost constant over the years and are respectively 4% and 0.1. © 2022 IEEE.

关键词： Energy efficiency

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Simulation and Analysis of the Change in the Radiation Characteristics of the Communication and Telemetry Antenna of the UAV Used as a Supplementary Rescue Device for SAR and HEMS 18

Simulation and Analysis of the Change in the Radiation Chara...

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18th International Scientific Conference on New Trends in Aviation Development, NTAD 2023

作者： Gecejová, Natália Češkovič, Marek Kurdel, Pavol Kopyt, Antoni Technical University of Košice Faculty of Aeronautics - Department of Avionics Košice Slovakia Warsaw University of Technology Faculty of Power and Aeronautical Engineering Division of Automation and Aeronautical Systems Warsaw Poland

ISBN: (纸本)9798350370416

Using unmanned aerial vehicles (UAVs) as supplementary devices for saving human lives extended significantly in a few years. Specifically designed and homologated UAVs are mainly used, but an affordable alternative is also available in conventional UAVs that have undergone appropriate modification. However, the modifications carried out on unmanned vehicles can disrupt the communication and telemetry channel, which is necessary for the mission's correct command and control by the pilot-operator from the ground. For this reason, every mechanical modification and improvement needs to be tested before a real flight test - ideally in a simulation environment. The presented paper is devoted to modifying the chosen UAV, then simulation and analysing the change in the antenna's radiation characteristics of the UAV communication-control (telemetry) module, adjusted to the form of the supplementary rescue device, which should be used mainly as the Helicopter Emergency Medical Service (HEMS) support. © 2023 IEEE.

关键词： Antennas

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A Novel Embryo Morphology Evaluation Based on Improved YOLOv8 Object Detection Model 1

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8th International Conference on Life System Modeling and Simulation, LSMS 2024 and 8th International Conference on Intelligent Computing for Sustainable Energy and Environment, ICSEE 2024

作者： Talha, Ouafa Zhou, Wenju Xu, Yuan Liu, Qiang Odeyemi, Jethro Shanghai Key Laboratory of Power Station Automation Technology School of Mechatronic Engineering and Automation Shanghai University Shanghai200444 China Department of Obstetrics and Gynecology First People’s Hospital Shanghai Jiaotong University Shanghai China School of Engineering and Technology Faculty of Engineering University of Bristol Bristol United Kingdom Division of Biomedical Engineering University of Saskatchewan Saskatoon Canada

ISBN: (数字)9789819603138

ISBN: (纸本)9789819603121

In this study, an improved YOLOv8 object detection model (YOLOv8-C2f-CA) is proposed to automate the detection and quantification of embryonic cells, supporting embryologists in accurately assessing embryo morphology. By integrating a Coordinate Attention (CA) mechanism into the YOLOv8 architecture, our model achieved 87.8% mean average precision (mAP), 83.9% precision, and 76.4% recall, outperforming the baseline YOLOv8. The lightweight CA mechanism is incorporated into both the backbone and neck networks of YOLOv8, bolstering the model’s capacity to identify the key morphological features of embryos without substantially impacting its size or computational efficiency. This method facilitates a rapid and precise evaluation process, minimizing the need for extensive time and human resources while maintaining precise accuracy. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Macroinvertebrates

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RELIABILITY-BASED MULTIDISCIPLINARY DESIGN OPTIMIZATION METHOD UNDER ORIGINAL PROBABILITY MODEL FOR WIND TURBINE STRUCTURE 14

RELIABILITY-BASED MULTIDISCIPLINARY DESIGN OPTIMIZATION METH...

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14th International Conference on Quality, Reliability, Risk, Maintenance, and Safety engineering, QR2MSE 2024

作者： Meng, Debiao Yang, Hengfei Nie, Peng Su, Xiaoyan Yang, Shiyuan School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Chengdu China Institute of Electronic and Information Engineering of UESTC in Guangdong Dongguan China School of Automation Engineering Shanghai University of Electric Power Shanghai China Faculty of Engineering University of Porto Porto Portugal

ISBN: (纸本)9781837242672

As an optimization strategy considering both uncertainty and discipline coupling, Reliability based Multidisciplinary Design Optimization (RBMDO) has been widely studied. While RBMDO is utilized across various fields, its application and overarching frameworks are scant in the context of wind turbine structures. This study introduces an RBMDO approach tailored for wind turbine structures. The method incorporates a strategy for resolving the Most Probable Point (MPP) issue based on the original probability model, which is particularly useful for addressing challenges encountered when RBMDO relies on the First Order Reliability Method that may result in multiple MPPs. To alleviate the computational demands of RBMDO, collaborative optimization, sequential optimization and reliability analysis are integrated into the methodology. The effectiveness of this approach is demonstrated through the design optimization of a 3 MW onshore wind turbine tower, considering the uncertainties in material properties, load conditions and design variables. © The Institution of engineering & Technology 2024.

关键词： Design aids

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Prediction and Analysis of power Consumption and power Loss at Industrial Facilities

Prediction and Analysis of Power Consumption and Power Loss ...

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2023 International Conference on Clean Electrical power, ICCEP 2023

作者： Gracheva, Elena Ivanovna Eduard Elsovich, Ibatullin Sinyukova, Tatiana Valtchev, Stanimir Miceli, Rosario Campagna, Nicola Kazan State Power Engineering University Departm. of Power Supply of Industrial Enterprises Kazan Russia Lipetsk State Technical University Automation and Computer Science Faculty Lipetsk Russia University Nova of Lisbon Faculty Fct and Uninova -CTS Portugal University of Palermo Department of Engineering Italy

ISBN: (纸本)9798350348378

In this article, a study of radial and trunk circuits of networks was carried out and power losses were determined using the proposed coefficients. Equivalent resistances of the investigated circuits were calculated considering the changes in circuit and mode parameters. Results of calculations are presented, considering equipment layout and technical parameters. © 2023 IEEE.

关键词： Equivalent circuits

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Reliability and Overload Capacity of power Transformers

Reliability and Overload Capacity of Power Transformers

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2023 International Conference on Clean Electrical power, ICCEP 2023

作者： Gracheva, Elena Ivanovna Petrova, Renata Maratovna Sinyukova, Tatiana Valtchev, Stanimir Miceli, Rosario Caruso, Massimo Kazan State Power Engineering University Departm. of Power Supply of Industrial Enterprises Kazan Russia Lipetsk State Technical University Automation and Computer Science Faculty Lipetsk Russia University Nova of Lisbon Faculty Fct and Uninova -CTS Portugal University of Palermo Department of Engineering Italy

ISBN: (纸本)9798350348378

The article describes the reliability of transformers, the failure rate and uptime to the first failure, the durability and maintainability of transformers and their service life, the allowable temperature rises and the dependence of steady-state overheating on the load factor of the transformer. An assessment of the effect of ambient temperature on the rated power of the transformer is shown. Dependences of heating on the changing load of transformers are given. The heating time constant is calculated depending on the power and cooling system of the transformer. The winding heating temperature is considered for real daily load schedules of a 33/11 kV transformer, the maximum actual overheats are compared when loaded with full power with allowable overheats. These studies can be used in transformers 33/11 kV and others with subsequent interpolation of values. © 2023 IEEE.

关键词： Failure rate

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