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3rd International Conference on Energy, Power and Electrical technology, ICEPET 2024

作者： Cheng, Yuan Sun, Haitao Chen, Yan Zhang, Yibo Taiyuan University of Technology Key Laboratory of Cleaner Intelligent Control on Coal and Electricity Ministry of Education College of Electrical and Power Engineering Taiyuan China

ISBN: (纸本)9798350352658

Aiming at the problem of high failure rate of full-bridge inverter with ring-winding structure SRM, an open circuit fault detection method for full-bridge inverter with ring-winding of switched reluctance motor is proposed in this paper. The inductance of three-phase winding is sampled, calculated and analyzed, and the change of the median value of inductance before and after fault is judged. Identify the fault type of power converter and locate the fault bridge arm and switch tube accurately. Finally, the simulation results verify the feasibility of the proposed fault diagnosis method. © 2024 IEEE.

关键词： Reluctance motors

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Research on the Planning of Electric Vehicle Charging Stations Based on Multi-View Graph Convolutional Networks 24

Research on the Planning of Electric Vehicle Charging Statio...

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24th COTA International Conference of Transportation Professionals: Resilient, intelligent, Connected, and Lowcarbon Multimodal Transportation, CICTP 2024

作者： Ma, Zechao Liu, Xiaoming Xia, Hanqing Wang, Weiqiang Key Laboratory of Urban Road Traffic Intelligent Tech School of Electrical and Control Engineering North China Univ. of Technology Beijing China

ISBN: (数字)9780784485484

ISBN: (纸本)9780784485484

In 2020, electric vehicle charging infrastructure was included in "new infrastructure," and its incremental growth has continued rapidly. However, there is still significant room for improvement in public charging pile density. Public charging infrastructure needs to be strategically located and expanded within urban spaces based on the specific needs and charging behaviors of different types of users. This study first utilizes heterogeneous data from multiple sources to analyze the behavioral characteristics of electric vehicle users and the impact of urban spatial attributes on charging demand. Subsequently, a modularity-optimized community detection algorithm is employed to partition urban spaces. Finally, a multi-view graph convolutional neural network, integrated with the XGBoost algorithm, is established to predict charging demand in specific areas within these communities. The model presented in this paper outperforms traditional graph neural networks in terms of regression and classification performance. © ASCE.

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Research on Lightweighting of Secondary Cables Over Door in Instrumentation Room of Segmented Isolation Cabinet 7

Research on Lightweighting of Secondary Cables Over Door in ...

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7th International Conference on Electric Power Equipment - Switching technology, ICEPE-ST 2024

作者： Zhao, Jing Wang, Xu Dai, Dongyun You, Yimin Cai, Ning Tu, Di School of Electrical Engineering and Automation Xiamen University of Technology Xiamen Key Laboratory of Frontier Electric Power Equipment and Intelligent Control Xiamen China

ISBN: (纸本)9798350388947

In order to solve the problems such as cable not easy to bundle and difficulty to open and close the instrument room door caused by too much secondary cables passing through the instrument room of intelligent miniaturized switchgear cabinet, this paper takes the secondary wiring diagram of intelligent miniaturized longitudinal rotary/shift-open sectional isolation cabinet installed in 220kV substation of a certain place as an entry point, analyzes the signal categories, connection methods, signal flow direction among different types of intelligent electronic device (IED), sensors and other components with the terminal internal wiring mode of the instrumentation room. Under the condition of keeping the function of the wiring diagram unchanged and conforming to the wiring regulations, the optimized design of the secondary cable of the instrumentation room door line of the switchgear cabinet is completed by adjusting the space arrangement of the IED and terminals, optimizing the redundant junction, and integrating the design of parts and components by other technical means. After optimization, the total number of secondary cables in the instrument room of the sectional isolation cabinet is reduced from 181 to 97, and the overall optimization rate reaches 46%. This research result can provide reference for intelligent miniaturized switchgear cabinet secondary cable lightweight design. © 2024 IEEE.

关键词： Electric switchgear

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Simulation and Optimization of Electrostatic Field in 40.5kV Inflatable Switchgear Cabinet 7

Simulation and Optimization of Electrostatic Field in 40.5kV...

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7th International Conference on Electric Power Equipment - Switching technology, ICEPE-ST 2024

作者： You, Yimin Wang, Xiankun Dai, Dongyun Zhuo, Kaicai Wang, Xu School of Electrical Engineering and Automation Xiamen University of Technology Xiamen Key Laboratory of Frontier Electric Power Equipment and Intelligent Control Xiamen China

ISBN: (纸本)9798350388947

The current rapid development of China's power transmission and transformation industry, inflatable switchgear has excellent environmental adaptability and small size, in the transmission and distribution network has been widely used. In order to further enhance the application range of inflatable cabinets, it is important to optimize the insulation performance of miniaturized switchgear. In this paper, electrostatic field simulation of 40.5kV inflatable switchgear based on the finite element method is carried out to judge the internal electric field distribution. Simulate and analyze the potential distribution and electric field strength distribution under the operating condition of the circuit breaker of the inflatable switchgear. The simulation results show that the electric field of sulfur hexafluoride in the outer shell of the inflatable switchgear is more concentrated near the poles, and the maximum value of the electric field reaches 78.2kV/mm, which exceeds the breakdown strength of the sulfur hexafluoride medium by 9kV/mm. Subsequently, the problem of excessive localized field strength is solved by studying the effects of conditions such as the length of the metal shielding ring and the radius of the metal crimp on the shielding effect. According to the simulation data, maintaining the volume and basic layout of the existing inflatable switchgear cabinet unchanged, after adding the optimized grounded metal shielding ring, the field strength at the pole and shell can be reduced to less than 9kV/mm, which meets the insulation requirements. The research results of this paper can provide theoretical guidance for the optimal design of the insulation of inflatable switchgear. © 2024 IEEE.

关键词： Sulfur hexafluoride

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Large flexible structure vibration measurement based on machine vision 43

Large flexible structure vibration measurement based on mach...

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43rd Chinese control Conference, CCC 2024

作者： Zhu, Yuanyuan Zhang, Haibo Ning, Zhijie Guo, Yanning Zheng, Lingxi Harbin Institute of Technology Harbin150001 China Beijing Institute of Control Engineering Beijing100000 China National Key Laboratory of Space Intelligent Control Beijing100000 China

ISBN: (纸本)9789887581581

A multi-target synchronous measurement method is proposed for the vibration measurement problem of large flexible structures. Select the appropriate system hardware according to the actual measurement requirements, and the binocular camera is used to acquire the image sequence of multiple points during the vibration process. An innovative method is proposed that combines feature point matching and Maximum Intersection over Union is proposed to achieve one-to-one mapping between multiple points. The vibration information of the flexible structure is obtained by image processing and three-dimensional coordinate calculation. Compared with the results obtained by the Optitrack motion capture system. Measures vibration with a frequency of 3Hz, the relative errors of most measurements are within 5%, which meets the requirements of most vibration measurements. © 2024 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Vibration measurement

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Research Progress of Human Movement Assessment System 6

Research Progress of Human Movement Assessment System

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6th Asia Symposium on Image Processing, ASIP 2024

作者： Guo, Tinghang Yin, Qianhan Li, Xiaohan Ji, Xin Qin, Zhuanping Han, Yu Tianjin University of Technology and Education Tianjin Key Laboratory of Information Sensing and Intelligent Control Hexi District No. 1310 Tianjin300222 China

ISBN: (纸本)9798350376159

The working principles and methods included in the existing motion estimation techniques are classified, and the research on motion estimation in various fields at home and abroad is collected in the existing literature to investigate and analyse the application of motion estimation in different fields as well as their respective advantages and limitations. Firstly, in terms of obtaining human movement information, two approaches are generally used: wearable sensor-based and vision-based pose estimation techniques. On this basis, the current methods of motion assessment are reviewed in terms of rule-based and model-based approaches, and then, the limitations of rule-based assessment methods are discussed and analysed, and it is pointed out that, with the development of technology and the increase of demand for personalised training, model-based scoring methods are more promising in the field of motion, and they can better solve the problem of evaluating and analyses. Finally, suggestions are made for future research directions. © 2024 IEEE.

关键词： Motion estimation

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Research and Application of Partial Discharge Identification Method of Switchgear Based on Joint Feature Collocation GBDT 7

Research and Application of Partial Discharge Identification...

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7th International Conference on Electric Power Equipment - Switching technology, ICEPE-ST 2024

作者： Dai, Dongyun Lin, Yuji You, Yimin Sang, Zhongqing Liao, Quanchang Tu, Yuanting School of Electrical Engineering and Automation Xiamen University of Technology Xiamen Key Laboratory of Frontier Electric Power Equipment and Intelligent Control Xiamen China

ISBN: (纸本)9798350388947

The audio signal in the running process of the switchgear contains a lot of operating state information, which is of great significance to the monitoring of the internal insulation fault and abnormal state. In order to accurately identify partial discharge signals and non-partial discharge signals from audio signals collected in the complex environment of switching station, a method of feature extraction and recognition of partial discharge signals based on joint feature and gradient lifting decision tree (GBDT) is proposed. Firstly, the information distribution of partial discharge signal and non-partial discharge signal in time domain, frequency domain and time-frequency domain is analyzed, and corresponding features are extracted to form joint features. Then, GBDT is used to train the model and complete the recognition. Finally, the recognition method is verified, and various combinations are compared with common features and support vector machine (SVM). The recognition accuracy of combined features with GBDT reaches 100%. Based on this method, an online monitoring system is designed, and the audio recording and partial discharge identification results are displayed in the WeChat mini program. The research method and the system designed in this paper can be used for the online analysis and detection of the audio signal of the switchgear, which has certain engineering application value. © 2024 IEEE.

关键词： Audio recordings

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Safety-Critical control of Autonomous Surface Vehicles for Collaborative Transportation Based on Quadratic Programming

Safety-Critical Control of Autonomous Surface Vehicles for C...

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International Conference on Artificial Intelligence and Autonomous Transportation, AIAT 2024

作者： Liu, Haodong Xu, Jiaxue Wang, Anqing Gu, Nan Liu, Lu Peng, Zhouhua School of Marine Electrical Engineering Dalian Maritime University Dalian116026 China Dalian Key Laboratory of Swarm Control and Electrical Technology for Intelligent Ships Dalian116026 China State Key Laboratory of Maritime Technology and Safety Dalian China

ISBN: (纸本)9789819639687

This paper addresses collaborative transportation of autonomous surface vehicles (ASVs) operating at a low speed in an open water area to assist in the movement of a ship. A constrained collaborative control method is proposed for ASVs based on a kinematic model. During the collaborative transportation phase, each ASV can converge to the desired position-heading by designing a safety-critical kinematic control law. To achieve the collaborative transportation of ASVs, the collaborative velocity signals are obtained by solving a quadratic programming problem subject to the contact force constraint and the assisted ship constraints such that the safety of ASVs during collaborative transportation can be ensured. By using the proposed constrained collaborative control method, the collaborative transportation of ASVs can be achieved. Simulation results are shown to validate the efficacy of the proposed constrained collaborative control method for collaborative transportation of ASVs. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Quadratic programming

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Alternative non-Gaussianity measures for quantum states based on quantum fidelity

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Chinese Physics B 2022年第3期31卷 192-200页

作者： Cheng Xiang Shan-Shan Li Sha-Sha Wen Shao-Hua Xiang College of Electrical and Information Engineering Huaihua UniversityHuaihua 418008 China Hunan Provincial Key Laboratory of Ecological Agriculture Intelligent Control Technology Huaihua 418008China

We propose three alternative measures for non-Gaussianity of quantum states: sine distance, Bures angle, and Bures distance, which are based on quantum fidelity introduced by Wang [Phys. Lett. A 373 58(2008)]. Using them, we evaluate the non-Gaussianity of some relevant single-mode and two-mode non-Gaussian states and find a good consistency of the three examined measures. In addition, we show that such metrics can exactly quantify the degree of Gaussianity of even Schrödinger-cat-like states of small amplitudes that can not be measured by other known non-Gaussianity measures such as the Hilbert–Schmidt metric and the relative entropy metric. We make a comparative study between all existing nonGaussianity measures according to the metric axioms and point out that the sine distance is the best candidate among them.

关键词： non-Gaussianity quantum fidelity non-Gaussian states sine metric

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Parallel Path-Following control of Fully-Actuated Autonomous Surface Vehicles Based on a High-Order Learning Extended State Observer

Parallel Path-Following Control of Fully-Actuated Autonomous...

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International Conference on Artificial Intelligence and Autonomous Transportation, AIAT 2024

作者： Xu, Jiaxue Liu, Haodong Gu, Nan Liu, Lu Peng, Zhouhua School of Marine Electrical Engineering Dalian Maritime University Dalian116026 China Dalian Key Laboratory of Swarm Control and Electrical Technology for Intelligent Ships Dalian116026 China State Key Laboratory of Maritime Technology and Safety Dalian China

ISBN: (纸本)9789819639724

Unlike traditional path-following methods, this paper develops a parallel control framework to investigate the path-following behavior of autonomous surface ships (ASVs) in the presence of unknown disturbances and model uncertainties. Specifically, a high-order learning extended state observer is proposed to construct a digital-twin ASV system, enabling precise depiction of the motion characteristics of the actual ASV system. Based on the states and unknown total disturbances estimated by the digital-twin ASV system, a parallel path-following controller is developed to actively guide the ASV to achieve path-following task. Simulation results validate the efficacy of the proposed parallel path-following control scheme for the fully-actuated ASV. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： State estimation

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