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检索条件"任意字段=3rd AIAA Flow Control Conference"

共 2651 条记录，以下是61-70 订阅

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Decoupled control Strategy of a Back-to-Back Modular Multilevel Matrix Converter Operating in Low Frequency AC Transmission Systems 3

Decoupled Control Strategy of a Back-to-Back Modular Multile...

引用

3rd International conference on Sustainable Mobility Applications, Renewables and Technology, SMART 2024

作者： Ravet, Tomás Rodríguez, Cristóbal Diaz, Matias Electrical Engineering Department E2Tech Research Center University of Santiago of Chile Santiago Chile

ISBN: (纸本)9798331532925

Low Frequency Alternating Current (LFAC) transmission systems offer an efficient alternative to conventional high-voltage AC or DC transmission for connecting offshore wind parks to the onshore grid. The Modular Multilevel Matrix Converter (M3C) is an appropriate technology for this application as it performs direct conversion at high power and voltage levels. However, the need for bulky isolation transformers can increase size, weight, and volume while decreasing efficiency. Consequently, this paper proposes a novel M3C in back-to-back equipped with a medium-frequency transformer. A novel decoupled control strategy is proposed to regulate floating capacitor voltages, enable medium-frequency transformer regulation, and provide bidirectional power control. Further, a grid-forming and grid-following strategy is implemented at the converter ports to regulate the LFAC grid. Simulation results obtained with PLECS software demonstrate the effectiveness of the proposed decoupled control strategy providing regulation of the converter variables, medium-frequency and bidirectional power flow control. © 2024 IEEE

关键词： Matrix converters

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CIM-empowered Multi-flow Model Construction Approach for Low-voltage Distribution Substation Area 3

CIM-empowered Multi-flow Model Construction Approach for Low...

引用

3rd International conference on New Energy and Power Engineering, ICNEPE 2023

作者： Shi, Zhan Guangdong Power Grid Co. Ltd. Power Dispatching and Control Center Communication Management Department Guangdong China

ISBN: (纸本)9798350393224

The efficient circulation of service flow, information flow, and energy flow plays a crucial part in the stable operation and business development of low-voltage distribution substation areas. With the widespread access to new energy equipment, low-voltage distribution substation area faces the problem of collaboration between service flow, information flow, and energy flow. It is necessary to build a multi-flow model to achieve multi-flow fusion and collaboration. To address the above problems, we first propose a CIM-empowered multi-flow fusion architecture for a low-voltage distribution substation area. Then, a CIM-empowered multi-flow model construction approach is proposed to achieve the fusion of service flow, information flow, and energy flow based on the network topology. Finally, the proposed model is verified by the experiment. © 2023 IEEE.

关键词： CIM low-voltage distribution substation area multi-flow fusion multi-flow model

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A Parallel control Method for Traffic Signal Considering Vehicle Arrival Prediction 3

A Parallel Control Method for Traffic Signal Considering Veh...

引用

3rd IEEE International conference on Digital Twins and Parallel Intelligence, DTPI 2023

作者： Tian, Yulin Liu, Shuqing Yan, Xuedong Zhu, Tao Beijing E-Hualu Information Technology Co. Ltd China Beijing Jiaotong University School of Traffic and Transportation China

ISBN: (纸本)9798350318470

Aiming at the deficiencies of the existing intersection adaptive control methods in terms of the control scheme initiative and the interaction level between the simulation and the actual system, this paper proposes a parallel control method for traffic signals that considers vehicle arrival prediction. The method is based on the theoretical architecture of parallel control, through the construction of a traffic flow arrival prediction model in the artificial system, to achieve the simulation assessment of the adaptability of the signal control scheme in the next time period and the generation of optimization parameters, and then the optimization decision module is designed to generate the best optimization parameters of the actual system. The method is able to improve the perception ability of the actual traffic signal control system and realize the active optimization of the intersection adaptive control scheme through the interaction between the actual system and the artificial system. The experimental results show that this method can effectively reduce the traveling delay and improve the intersection capacity during the time when the traffic flow fluctuates significantly. © 2023 IEEE.

关键词： Forecasting

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A Study of the Effect of Phase Shifting Transformers on Line Longitudinal Differential Protection 3

A Study of the Effect of Phase Shifting Transformers on Line...

引用

3rd International conference on Energy, Power and Electrical Engineering, EPEE 2023

作者： Ni, Pinghao Zhang, Jianguo Liang, Junming Li, Xudong Liu, Zongye School of Electrical Engineering Beijing Jiaotong University Beijing China State Grid Smart Grid Research Institute Limited Beijing China

ISBN: (纸本)9798350318180

For the problem of uneven power flow distribution and line overloading in the power grid, symmetrical double-core phase shifting transformer (PST) can be used to realise the control of line power flow. Due to the symmetrical double-core phase shifting transformer access to the equivalent impedance and voltage shift angle of the impact of the line longitudinal differential protection may be false or refused to act, resulting in the protection can not be correctly acted. Based on the structure and equivalent circuit of symmetrical double-core phase shifter transformer, this paper analyses the influence of its access on the power flow distribution of the power system and the influence mechanism on the longitudinal current differential protection, and puts forward the improvement measures for the longitudinal current differential protection of the line containing phase shifter transformer. Finally, a simulation model is constructed in PSCAD, and simulation is used to verify the correctness of the mechanism analysis and the effectiveness of the proposed improvement measures. © 2023 IEEE.

关键词： influencing mechanism longitudinal differential protection phase shifting transformer power flow control power flow distribution

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Simulation Analysis of Arc Motion of High Voltage DC Relay 3

Simulation Analysis of Arc Motion of High Voltage DC Relay

引用

3rd International conference on Electrical Engineering and control Science, IC2ECS 2023

作者： Wang, Xili Lei, Peiyi School of Electrical and Control Engineering Liaoning Technical University Liaoning Xingcheng China

ISBN: (纸本)9798350382426

The study of arc motion characteristics is an important content of HVDC relay to improve its life. The method of research uses computational fluid dynamics software fluent to write user-defined functions UDF and user-defined scalar UDS through C language and custom macro instructions to realize the secondary development function of software. The conclusion shows that: The greater the intensity of the magnetic field, the faster the gas flow rate between the electrodes, and the faster the arc motion. This will help reduce the arc time. © 2023 IEEE.

关键词： arc simulation fluent high voltage DC relay magnetic field MHD

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Optimal Feedback Loop Algorithm for Automatic control of Ultrasonic Gas flowmeter 3

Optimal Feedback Loop Algorithm for Automatic Control of Ult...

引用

3rd International conference on Artificial Intelligence and Smart Energy, ICAIS 2023

作者： Liu, Huijie Chongqing Research Institute China Coal Technology and Engineering Group Chongqing400039 China

ISBN: (纸本)9781665462167

At present, the signal detection principle of the ultrasonic flowmeter can be roughly divided into propagation velocity difference method, the beam shift method, the Doppler method, correlation method, spatial filtering method and noise method, and hence, the proper selection of the methods will be essential for the success of the modelling. This paper then studies the optimal feedback loop algorithm for the automatic control of ultrasonic gas flowmeter. Firstly, the ultrasonic gas flow measurement principle is introduced, considering that the time difference measurement principle will use the movement time difference of ultrasonic waves in the case of forward flow and reverse flow to measure gas flow. Secondly, realization of the intelligent ultrasonic gas flow measuring system is studied. Here, the Butterworth filters are considered to maintain the useful ultrasonic signal in a proper frequency range by removing high and low frequency noise. Finally, the optimal feedback loop is considered to finalize the model. The proposed experiment will provide the high-speed comparison of signal waveform simulation to show the visualized performance and then, the error comparison analysis in conducted to test the performance under different flow rate. © 2023 IEEE.

关键词： flow of gases

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Voice flow control using Artificial Intelligence 3

Voice Flow Control using Artificial Intelligence

引用

3rd International conference on Smart Data Intelligence, ICSMDI 2023

作者： Velugoti, Tejasri Kumar, L. Hemanth Vinay, Koneru Vanitha, M. Saveetha Engineering College Department of Electronics and Communication Engineering Chennai India Saveetha Engineering College Chennai India

ISBN: (纸本)9781665464871

In the ultramodern era of fast moving technology, we are able to do actions that were never before possible. However, in order to complete and manage these studies, a platform that can easily and comfortably automate all of our chores is required Therefore, we must create a Special Assistant with excellent deductive skills and the capacity to communicate with the outside world only via one of the materialistic forms of human contact, i.e. HUMANVOICE.[1]There aredifferent ways to develop voice user interfaces. People without programming skills can use this Voice flow to develop their first voice project. Voice flow is suitable for simple and more complicated voice projects. It can beused for Alexia Skills and Google Actions as well. © 2023 IEEE.

关键词： Artificial intelligence

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Computer Virtual Reality Automatic control Database System 3

Computer Virtual Reality Automatic Control Database System

引用

2023 IEEE 3rd International conference on Data Science and Computer Application, ICDSCA 2023

作者： Xin, Liu Jiangsu Union Technical Institute Zhenjiang Branch Zhenjiang Vocational Technical College Zhenjiang China

ISBN: (纸本)9798350341546

In this paper, based on computer virtual reality technology, a real-time database system of multiple storage media is established. A real-time database in the configuration system is constructed by using DLL technology, and the data modeling and interface design of the database are carried out. The real-time data partitioning algorithm realizes the automatic and instant generation of data partitioning, and improves the system scalability and throughput by using the horizontal expansion mechanism of streaming computing framework. Finally, an example of realtime database class and related data model is given. © 2023 IEEE.

关键词： automatic control system big data management Database partition flow computing framework virtual reality

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Experiments for control of boundary layer transition by plasma actuators 3

Experiments for control of boundary layer transition by plas...

引用

2024 3rd International conference on Applied Mechanics and Advanced Materials, ICAMAM 2024

作者： Song, Tianwei Zhang, Ziqi Shi, Zhenxing Chi, Dejian Duan, Xu Shanghai Electro-Mechanical Engineering Institute Shanghai201109 China

Plasma flow control technology is a new type of active flow control technology, and this paper carries out certain research on the basic principle of plasma flow control technology and its application on the wing model. The paper introduces the theory of plasma discharge and analyzes how plasma can control the flow field. A parallel dielectric barrier discharge plasma exciter is then designed and tested by using the Particle Image Velocimetry (PIV) technique to investigate the spatial flow field distributions of single-stage and three-stage actuators, and the mechanism of jet generation by the actuator is analyzed. Finally, the plasma actuator was utilized to control flow separation on a super-zero-boundary airfoil, and the oil droplet interferometric method was used to study the actuator's role in controlling boundary layer transition. The experiment revealed that increasing the actuator discharge voltage can further reduce wall drag and more effectively delay the transition. Under the given conditions of a head-on angle of 6° and the incoming wind speed of 20 m/s, a two-stage actuator's continuous discharge parameter was set to an output voltage of 12 kV and an output frequency of 4.7 kHz. The results showed that the transition position can be delayed by 13%, indicating the effectiveness of the actuator's jet effect in enhancing the stability of the boundary layer flow. © Published under licence by IOP Publishing Ltd.

关键词： Actuators

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Traffic flow Optimization Using CNN and GCN for Adaptive Signal control 3

Traffic Flow Optimization Using CNN and GCN for Adaptive Sig...

引用

3rd IEEE Asian conference on Innovation in Technology, ASIANCON 2023

作者： Kolte, Sanket Ingle, Anup Kshirsagar, Ketki Gawande, P.G. Kumbhar, Kalpana A. Kawchale, Rupa S. Vishwakarma Institute of Information Technology Department of Electronics and Telecommunication Pune India

ISBN: (纸本)9798350302288

The number of vehicles is increasing every day, and hence traffic congestion, especially in intersections, is becoming a major issue. This paper presents a novel approach for traffic analysis and signal prediction using a combination of deep learning techniques.3000 images were utilized to train on CNN (Convolutional Neural Network) for spatial feature extraction using the Yolov5 algorithm. Then those features were given to the GCN (Graph Convolutional Network) as input by creating a DGL graph. The findings from this research provide valuable insights into improving traffic flow efficiency and can be applied in various sectors such as logistics, transportation, and urban planning. © 2023 IEEE.

关键词： Message passing

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