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10th Frontier Academic Forum of Electrical Engineering, FAFEE 2022

作者： Cui, Liu Li, Shuyong Huang, Libin Guo, Qi Deng, Lijun State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou510663 China National Energy Power Grid Technology R and D Centre Guangzhou510663 China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou510663 China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou510663 China

ISBN: (纸本)9789819934034

In order to test the travelling wave fault location devices that widely used in power system, a simulation model that can reflect the transformer characteristics of travelling waves on the transmission channel should be built. In this paper, the current transformer (CT) on the transmission channel is modelled, then the CT attenuation characteristic to travelling waves is proved by adding sine wave and square wave on the CT primary side. By using PSCAD and travelling wave fault locator examiner, a half-real time simulation environment is constituted to test the travelling wave fault locator. In PSCAD, CT is modeled by measuring parameters. Finally, amplitude frequency response characteristics of the actual CT and the CT model are compared. The result shows that simulation model in this paper reflects well on the CT high-frequency attenuation characteristic. © Beijing Paike Culture Commu. Co., Ltd. 2023.

关键词： Electric instrument transformers

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Omnidirectional Wireless Power Transfer Based on 2-D Decoupled Combination Coil and Excitation Current Vector Control

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International Journal of Circuit Theory and Applications 2025年第0期

作者： Yao, Xiaodi Guo, Yanjie Wang, Ruimin Wang, Xu Zhang, Yajing Song, Baihao Zhang, Zepeng State Key Laboratory of Intelligent Power Distribution Equipment and System Hebei University of Technology Tianjin China School of Automation Beijing Information Science and Technology University Beijing China

This article presents an excitation current vector control method based on a two-dimensional (2-D) decoupled combination transmitting coil that can generate a three-dimensional (3-D) rotating magnetic field. Through this method, the output power of the omnidirectional wireless power transfer (WPT) system can reach small fluctuations, when the receiving coil rotates at any angle. First, the 2-D combination transmitting coil, consisting of three regular hexagonal coils, is analyzed by the second-order vector potential theory. Then, mutual decoupling among the three regular hexagonal coils is achieved at a specific coil overlapping distance. Moreover, system equivalent circuit model is established, and the relationship between system output power and dual phase shift angles is obtained. Furthermore, an excitation current vector control method is proposed to generate the 3-D rotating magnetic field under different receiving coil rotation conditions. Uniform spatial energy distribution can be obtained through this method, in which the magnetic field amplitude is adjusted by the inverter phase shift angles, and the magnetic field direction is determined by the phase angle differences. Finally, the proposed method is verified based on a developed omnidirectional WPT prototype. Experimental results show that when the receiving coil rotates at any angle, relatively high system transmission efficiencies can be achieved. Meanwhile, the maximum output power fluctuation rate is only 12.3%, which is improved compared to the existing literature. © 2025 John Wiley & Sons Ltd.

关键词： Vectors

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Unified Grid-Forming Control for MMC-MTDC systems with Renewable Power Integration 6

Unified Grid-Forming Control for MMC-MTDC Systems with Renew...

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6th International Conference on HVDC, HVDC 2024

作者： Yang, Renxin Cai, Haiqing Su, Mingzhang Gu, Haohan Chen, Zhihao Cai, Xu Shanghai Jiao Tong University Key Laboratory of Control of Power Transmission and Conversion Shanghai China Electric Power Research Institute China Southern Power Grid State Key Laboratory of Hvdc Guangzhou China National Energy Power Grid Technology R&d Centre China Southern Power Grid Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System China Southern Power Grid Guangzhou China

ISBN: (纸本)9798350387759

Using modular multilevel converter-based multi-terminal high voltage direct current (MMC-MTDC) transmission to integrate large-scale renewable power into the main power grid is an important development trend in China. To cope with the stability issues under weak grid conditions, different grid-forming control strategies have been proposed for the MMC in MTDC transmission systems. These control strategies have different structures due to different control targets and are difficult to unify. To solve this problem, a novel grid-forming control structure is proposed in this paper. The MMC emulates the synchronous generator (SG), and the submodule capacitor voltage emulates the SG rotor speed. On this basis, by utilizing the modulation control degree freedom, a unified DC-side controller is proposed to realize different control targets. Finally, the simulation model of a 4-terminal MMC-MTDC transmission system with renewable power integration is established in the PSCAD/EMTDC. The effectiveness of the proposed strategy is verified by the simulation results. © 2024 IEEE.

关键词： grid-forming MMC-MTDC multi-targets control unified control structure

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A Vision-based Bird’s Eye View Representation Network for 3D Objects in Open-pit Mining Area 22

A Vision-based Bird’s Eye View Representation Network for 3...

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22nd IEEE International Conference on Industrial Informatics, INDIN 2024

作者： Tai, Mengen Liu, Wentao Wang, Zhangyu Zhou, Bin Yu, Guizhen Yang, Songyue School of Transportation Science and Engineering Ministry of Industry and Information Technolody Beihang University Beijing China State Key Lab of Intelligent Transportation System Ministry of Industry and Information Technolody Beihang University Beijing China The Key Laboratory of Autonomous Transportation Technology for Special Vehicles Ministry of Industry and Information Technolody Beihang University Beijing China

ISBN: (纸本)9798331527471

Autonomous transportation systems, which have reconstructed open-pit mining operations, depend on accurate and real-time obstacle detection in challenging environments. Existing methods often exhibit limitations in accuracy due to their reliance on traditional image-based techniques, leading to errors and incomplete results. To address these issues, we developed a vision-based 3D object detection algorithm designed for open-pit mining environments. Our approach leverages the BEVDepth model, enabling accurate 3D object recognition using monocular camera input. Moreover, camera parameters are integrated to enhance resilience and flexibility across diverse mining environments. Last, our algorithm was implemented on a newly customized open-pit mining dataset. The experimental results verify the algorithm efficiency by attaining a high mean Average Precision score (mAP) of 67% while offering real-time performance with inference times as short as 25ms per frame. It enables accurate and efficient obstacle detection in autonomous mining vehicles and contributes to the development of safer and more productive mining operations. © 2024 IEEE.

关键词： Obstacle detectors

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Tactile-Based Object Pose Estimation Employing Extended Kalman Filter 8

Tactile-Based Object Pose Estimation Employing Extended Kalm...

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8th IEEE International Conference on Advanced robotics and Mechatronics, ICARM 2023

作者： Lin, Qiguang Yan, Chaojie Li, Qiang Ling, Yonggen Zheng, Yu Lee, Wangwei Wan, Zhaoliang Huang, Bidan Liu, Xiaofeng College of IoT Engineering Hohai University Jiangsu Key Laboratory of Special Robotic Technology Jiangsu Changzhou213022 China Zhejiang University Institute of Cyber-System and Control State Key Laboratory of Industrial Control and Technology Hangzhou China Bielefeld33619 Germany Tencent Robotics X Shenzhen China School of Computer Science and Engineering Sun Yat-sen University Guangzhou China

ISBN: (纸本)9798350300178

In this paper, we present a new approach to estimate the pose of an object being manipulated by a multi-fingered robotic hand. The method utilizes advanced tactile sensors with high spatial resolution to optimize the estimation of the object's pose using an Extended Kalman Filter (EKF) based approach. We defined and derived the state and measurement equations, as well as evaluated the estimation accuracy in grasping tasks. The approach is able to effectively account for the pose transition caused by tactile pushing, and the mapping from the object's pose to the contact position and normal direction as measured by the tactile sensor. The method was evaluated in multiple grasping experiments in simulation scenarios. Results show that the estimation can converge towards the ground truth in a relatively short period of time, with displacement and rotation errors remaining within acceptable levels. This new method has the potential to improve the accuracy and reliability of robotic grasping and manipulation tasks. © 2023 IEEE.

关键词： Extended Kalman filters

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Identification of Transient Voltage Stability Weakness in Power systems Based on Grad-CAM 7

Identification of Transient Voltage Stability Weakness in Po...

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7th IEEE International Conference on Power and Renewable Energy, ICPRE 2022

作者： Qin, Changlong Jia, Yujian Li, Zhendong Li, Guang Li, Li Zhu, Yuanzhen State Grid Jinan Power Supply Company Jinan China Shandong University Key Laboratory of Power System Intelligent Dispatch Control of Ministry of Education Jinan China

ISBN: (数字)9781665450638

ISBN: (纸本)9781665450638

With the changes in generation and load characteristics, transient voltage problems have a serious impact on the safe and stable operation of the power system. In this paper, on the basis of constructing a fast evaluation model of transient voltage stability based on convolutional neural network, the key electrical quantities that the model focuses on in the evaluation process are pointed out by Grad-CAM algorithm, and the weakness of system voltage stability are identified. The simulation results show that the proposed method can explore the links that are neglected by traditional methods, and the identified weakness consider both topological and state information, which verifies the superiority of the method in this paper. © 2022 IEEE.

关键词： Convolution

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Template-Based Collaborative Design Task Management for Complex Products 7

Template-Based Collaborative Design Task Management for Comp...

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2020 7th International Conference on Computer-Aided Design, Manufacturing, Modeling and Simulation, CDMMS 2020

作者： Zhou, Junhua Xue, Junjie Shi, Guoqiang State Key Laboratory of Intelligent Manufacturing System Technology Beijing Institute of Electronic System Engineering Beijing100854 China

The task template system of this system combines the business requirements of the work and provides the classification management function of work packages and work package templates. At the same time, data integration with other systems such as the main data system and resource library is realized. Through this system, users can instantiate a single work package to form a single work item, and can also establish the front and back relationship of the work package through the work package template, thereby realizing the instantiation of the work package process. © Published under licence by IOP Publishing Ltd.

关键词： Data integration

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Reliable observer-based control against sensor failures for fractional order systems

Reliable observer-based control against sensor failures for ...

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第42届中国控制会议

作者： Bingxin Li Yujie Zhang Yaowei Liu Xin Zhao Institute of Robotics and Automatic Information System and the Tianjin Key Laboratory of Intelligent Robotics Nankai University Institute of Intelligence Technology and Robotic Systems Shenzhen Research Institute of Nankai University

In the paper,stability analysis of a class of incommensurate fractional-order systems(IFOS) is *** sufficient conditions are based on the linear matrix inequality(LMI) and straightforwardly used to solve the feasible solutions with the LMI ***,two examples including a circuit example are given to illustrate the effectiveness of the proposed method,and the comparison with the previous results shows that the proposed method is less conservative.

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A Real-Time state Estimation Method with Dual Filter Framework Based on MEMS-SINS/GNSS system

A Real-Time State Estimation Method with Dual Filter Framewo...

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第43届中国控制会议

作者： Xin Xiong Yamin Huang Tao Lei State Key Laboratory of Maritime Technology and Safety Wuhan University of Technology Intelligent Transport System Research Center Wuhan University of Technology

ISBN: (数字)9789887581581

ISBN: (纸本)9798350366907

High-precision navigation information of a remote-controlled ship(RC-ship) is vital for ensuring the safe and effective operation by shore-based ***,the complexity of the waterborne environment contributes to increased uncertainty in the system model,leading to inaccuracies in state filter ***,Due to the delay of communication between ship and shore,the accuracy of real time state estimation will be further *** this paper,A realtime state estimation method considering both navigation system error and time delay error is *** of all,an adaptive interactive multi-model(IMM) algorithm based on Cubature Kalman Filter(CKF) framework is proposed to address the issue of system noise uncertainty by matching the appropriate model within the model ***,the uncertainty of transmission delays is modeled using a probability density function(PDF),enabling this method to handle uncertain time ***,an augmented state method considering the uncertainty of communication delay is proposed to compensate the time delay *** validate the effectiveness of the proposed method,a series of real ship-borne experiments including different scenarios of communication delay were *** results show that this method can estimate the realtime state of the ship under different sailing scene with uncertain time delay.

关键词： real-time state estimation CKF RC-ship IMM

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Multi-Port Collaborative Control Strategy With Smooth Operational Transitions for Photovoltaics, Energy Storage, Direct Current, and Flexibility system

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IEEE Transactions on Power Electronics 2025年第8期40卷 11715-11724页

作者： Zhang, Yun Li, Tong Liu, Xiaodong Huang, Zhen Li, Qian Tianjin University State Key Laboratory of Intelligent Power Distribution Equipment and System School of Electrical and Information Engineering Tianjin300072 China Tianjin University National Industry-Education Platform of Energy Storage Tianjin300350 China Chengdong Power Supply Branch of State Grid Tianjin Electric Power Company Ltd. Tianjin300250 China Nanchang University School of Information Engineering Nanchang330031 China Jiujiang Power Supply Branch of State Grid Jiangxi Electric Power Company Ltd. Jiujiang332000 China

The photovoltaics, energy storage, direct current, and flexibility (PEDF) system requires coordinated control of distributed PV units, distributed ES units, dc distribution units, and the ac grid to supply power to various types of loads efficiently. This article designs a PEDF collaborative system based on a bipolar dc bus architecture, considering factors, such as port characteristics, voltage gain, and control complexity. Additionally, to prevent potential oscillations that may occur during the mode and control loop transitions in traditional collaborative control, this article proposes a multiport collaborative control strategy with smooth operational transitions. Finally, simulation and experimental results demonstrate the feasibility and effectiveness of the proposed strategy through stable multiport operation and smooth operational transitions under various conditions. © 1986-2012 IEEE.

关键词： DC distribution systems

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