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4th IEEE International Conference on Power, intelligent Computing and systems, ICPICS 2022

作者： Liu, Fusuo Wang, Chao Ma, Ruicong Li, Wei Cao, Yongji Chang, Haijun Zhang, Hengxu Gao, Zhimin State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation State Grid Electric Power Research Institute Nanjing China NARI Group Corporation State Grid Electric Power Research Institute Nanjing China Key Laboratory of Power System Intelligent Dispatch and Control of the Ministry of Education Shandong University Jinan China

ISBN: (数字)9781665467735

ISBN: (纸本)9781665467735

With the increasing penetration of power electronic devices, the behaviors of the power system become more and more complex. This paper analyzes the coupling characteristics between the frequency dynamics and power angle oscillation. The mechanism of frequency response and power angle oscillation is derived. The evaluation indexes are proposed to quantify the frequency response, power angle oscillation, and coupling characteristics. The coupling degree of the frequency dynamics and power angle oscillation is depicted by the Pearson correlation coefficient. The impacts of power angle oscillation on the frequency response are attained through time-domain simulation and theoretical analysis. The results show that the proposed evaluation indexes are effective to quantify the coupling characteristics. Additionally, there is positive correlation between the frequency dynamics and power angle oscillation. © 2022 IEEE.

关键词： Frequency response

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Preventive control Method of Improving Transient Voltage Stability for Power system Based on the Attention of CNN

Preventive Control Method of Improving Transient Voltage Sta...

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Sustainable Power and Energy Conference (iSPEC)

作者： Zhendong Li Jiongcheng Yan Yutian Liu Li Li Hanbing Qu Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China State Grid Jinan Power Supply Company Jinan China

The widespread integration of renewable generation and the changes in load structure bring significant challenges to the transient voltage stability of large-scale power systems. In order to achieve fast decision of preventive control for improving transient voltage stability, this paper proposes a preventive control method based on the attention of Convolutional Neural Network (CNN). An optimization decision model is established, which not only considers multiple traditional constraints but also introduces the model attention indicator based on Gradient-weighted Class Activation Mapping (Grad-CAM), enabling a more targeted improvement of transient voltage stability. The proposed indicator is capable of extracting the knowledge learned by CNN-based transient voltage assessment model, and utilizing it to guide the optimization decision-making of preventive control. Simulation results of provincial grid of eastern China demonstrate that the optimized control scheme can effectively enhance the transient voltage stability of power systems.

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ABS/EBD Automobile Auxiliary Brake system based on CAN Bus 7

ABS/EBD Automobile Auxiliary Brake System based on CAN Bus

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7th International Symposium on system and Software Reliability, ISSSR 2021

作者： Qiu, Yueyou Fang, Junchu Zhu, Zhilong Ministry of Education College of Electrical Engineering Anhui Polytechnic University Key Laboratory of Advanced Perception and Intelligent Control of High-end Equipment Wuhu China

ISBN: (纸本)9781665434317

Anti-lock braking system (ABS) can prevent the situation of front and rear wheels locked. However, the car having only ABS is not enough. For example, the distribution of braking force in the early stage of the car braking, and the car in the wet road starting acceleration. In the situation, the car requires ABS and other control systems of the car work together. In this paper, the electronic braking force distribution device (EBD) is integrated into the ABS to form the ABS/EBD braking system based on CAN bus. It consists of speed sensor, CAN bus, control unit and braking force distribution device. The system is used to improve the directional stability of braking before the ABS system starts. By measuring the slip rate of four wheels, the degree of locking is judged, so that the slip rate of four wheels is close, so that all wheels can be locked at the same time as much as possible. Compared with other braking force distribution systems, the system is characterized by the use of CAN bus as the carrier, which effectively improves the system's response ability and computing ability. It is also convenient to combine with other electronic systems on the car to form the intelligent network of the car. © 2021 IEEE.

关键词： Wheels

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An Optimized Design of an Electric Vehicle Wireless Charging Coupling Coil 4

An Optimized Design of an Electric Vehicle Wireless Charging...

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2021 4th International Conference on Mechanical, Electrical and Material Application, MEMA 2021

作者： Xie, Wei Chen, Qi-Gong Lei, Shou-Zhong Key Laboratory of Advanced Perception and Intelligent Control of High-end Equipment Ministry of Education Anhui Polytechnic University Anhui Province Wuhu241000 China

With the development of electric vehicle wireless charging technology, the transmission power and transmission efficiency of electric vehicle wireless charging system have become the focus of current research. The transmission power and efficiency of wireless charging system largely depend on the energy loss of two resonant coupling coils. The energy loss is mainly related to the structural parameters of the coupling coil and the coupling coefficient of the two coils. On this basis, the structure of the coupling coil is designed and optimized by using the finite element analysis software Maxwell, and a new combined transmitting coil structure is designed. Experiments and verification show that the coil design meets the requirements of transmission efficiency, which can provide a reference for the design of wireless charging coil of electric vehicle in the future. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Vehicle transmissions

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Distributed Neighbor Selection on Matrix-weighted Networks

Distributed Neighbor Selection on Matrix-weighted Networks

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Youth Academic Annual Conference of Chinese Association of Automation (YAC)

作者： Haoyu Wei Lulu Pan Haibin Shao Dewei Li Department of Automation and Key Laboratory of System Control and Information Processing Ministry of Education of China and Shanghai Engineering Research Center of Intelligent Control and Management Shanghai Jiao Tong University Shanghai China

This paper explores distributed neighbor selection in matrix-weighted networks, where a matrix-valued weight captures the interdependencies among agents’ states. We demonstrate the feasibility of preserving and, in certain cases, improving the convergence rate of matrix-weighted networks by having agents exclusively engage with a subset of their neighbors. Leveraging the inherent monotonicity of Laplacian matrix eigenvectors, we introduce a novel neighbor selection criterion that reduces network connections while enhancing convergence rates. Existing neighbor selection strategies often require acquiring information from all nodes before making decisions. In order to propose a distributed neighbor selection strategy for matrix-weighted networks, we establish a numerical relationship between Laplacian eigenvectors and a locally measurable metric. In essence, this paper extends prior findings from scalar-weighted networks to matrix-weighted networks.

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Designing Cluster Consensus on Higher-Order Interaction Networks

Designing Cluster Consensus on Higher-Order Interaction Netw...

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IEEE Conference on Decision and control

作者： Haoyu Wei Lulu Pan Haibin Shao Dewei Li Wenbin Yu Shibei Xue Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai Engineering Research Center of Intelligent Control and Management Shanghai China

This paper examines the cluster consensus design problem on higher-order interaction networks. Specifically, the higher-order interaction mechanism is captured by matrix-weighted networks that allow the interdependency across the dimensions of the agents' states, and the matrix-valued weight matrices $A_{ij}\in \mathbb{R}^{d\times d}$ associated with specific edges are further assumed to share the same nullspace for design purposes. Under mild assumptions on network connectivity, we first examine the case that the nullspace of positive semi-definite edges is spanned by a nonzero vector $\boldsymbol{\xi}\in \mathbb{R}^{d}$ and show that the predictable cluster consensus can be achieved, which is eventually located in the 1-dimensional linear space determined by span $\{\boldsymbol{\xi}\}$ and the average of agents' initial states. Moreover, the transient state of agents in each cluster can also be explicitly characterized. Namely, the derivative of the average state of agents in each cluster is perpendicular to span $\{\boldsymbol{\xi}\}$ . To generalize the above results, we proceed to examine the case that the nullspace of positive semi-definite edges is spanned by more than one linearly independent $d$ -dimensional vector, in which case, analogous results can be obtained, and the explicit geometric interpretation is also provided.

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Real-time Grid Impedance Identification for Synchronization Stability control in Grid-following Converter 5

Real-time Grid Impedance Identification for Synchronization ...

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5th IEEE International Electrical and Energy Conference, CIEEC 2022

作者： Cheng, Liang Ye, Hua Wang, Ting Dong, Xin Li, Yanran Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China State Grid Shandong Electric Power Co. Ltd Jinan China State Grid Jinan Power Supply Company Jinan China

ISBN: (数字)9781665411042

ISBN: (纸本)9781665411042

The synchronization instability is one of the serious problems for grid-following converter (GFL). Real-time identification of AC grid impedance enables improves the application of adaptive current injection synchronous stabilization control method in practical power systems. In this paper, a Thevenin equivalent (TE) impedance identification method using Fast Fourier Transform (FFT) analysis is proposed and applied to GFL synchronous stability control. First, according to the analysis of the static and dynamic instability mechanism of phase-locked loop (PLL), the necessity of impedance identification is explained. Then, using FFT analysis, the TE impedance of the AC system is calculated in real-time. Finally, the estimated TE parameters are used to determine the current references of GFL during the fault to ensure that no loss of synchronization (LOS) occurs in the GFL. The simulation results show that the proposed identification method can quickly track the AC grid impedance changes of system after a fault, and can be used in the adaptive current control strategy. © 2022 IEEE.

关键词： Fast Fourier transforms

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Leader-Following Entrapping control of AUVs Using Bearing Measurements in Local Coordinate Frames

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Guidance, Navigation and control 2022年第4期2卷 85-121页

作者： Yingbo Fu Ziwen Yang Shanying Zhu Cailian Chen Department of Automation Shanghai Jiao Tong UniversityShanghai 200240P.R.China Key Laboratory of System Control and Information Processing Ministry of Education of ChinaShanghai 200240P.R.China Shanghai Engineering Research Center of Intelligent Control and ManagementShanghai 200240P.R.China

In this paper,the entrapping control problem of discrete-time AUVs with local coordinate frames is *** achieve entrapment in arbitrarily shaped orbits and formations,we design a bearingbased leader-following framework fully in the discrete-time domain with four parts:the orientation estimation unit,estimator unit,controller unit and parameters tuning *** bearing measurements and communication information,the orientation estimation unit can estimate orientations of local coordinate frames infinite time,and the estimator unit can achieve local *** on estimation,the controller unit can drive each AUV to track the desired orbit or formation with an arbitrary *** present su±cient conditions under which stability of the overall system is proved using the theorem offinite-time stability and LaSalle's theorem for the discrete-time ***,the parameters tuning unit can calculate optimal parameters to improve overall ***,we extend our schemes to nonholonomic AUVs with unicycle ***,simulation results demonstrate the effectiveness of the proposed scheme.

关键词： Entrapping control discrete-time AUVs bearing measurements local coordinate frames

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Screening of Areas with High Risk of Short-Circuit Current Exceedance in Power systems with Renewable Energy Integration

Screening of Areas with High Risk of Short-Circuit Current E...

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IEEE Asia Power and Energy Engineering Conference (APEEC)

作者： Jian Wang Haoran Chen Hang Qi Changgang Li Wei Dong Yi Lu Wen Hua Zhengyang Zhou Longfei Wang Ying Cheng Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China State Grid Zhejiang Electric Power Co. Ltd. Research Institute Hangzhou China

ISBN: (数字)9798350373479

ISBN: (纸本)9798350373486

The efficient short circuit calculation is the basis of short circuit current control. Commonly, the iterative calculation method of short-circuit current is adopted in power systems containing renewable energy sources. However, the detailed short-circuit current screening for all areas in power systems is time-consuming. To address this problem, this paper proposes an efficient screening method for areas with high risk of short-circuit current exceedance. Firstly, this paper builds the short-circuit models of synchronous generator and renewable energy source. Then, an efficient approximate calculation method of the maximum short-circuit current is proposed. Finally, a screening method for high-risk areas with short-circuit current exceeding limit is proposed, and an index of screening performance is defined. The validity of the proposed method is verified with a modified New England 39-bus power system.

关键词： Electrical engineering Renewable energy sources Power transmission lines Short-circuit currents Asia Synchronous generators Power systems

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Prediction and Preventive control Scheme for Wind and PV Power Ramp Events

Prediction and Preventive Control Scheme for Wind and PV Pow...

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IEEE International Conference on Power and Power and Renewable Energy (ICPRE)

作者： Yifei Zhai Zengwei Wang Kunpeng Zhang Huan Ma Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China Power Grid Technology Center State Grid Shandong Electric Power Research Institute Jinan China

ISBN: (数字)9798350377460

ISBN: (纸本)9798350377477

As the large scale integration of photovoltaic and wind power into the grid increases, renewable energy ramp events have become a potential threat to the secure operation of the power grid. To effectively address renewable energy power ramp events, this paper proposes a prediction and preventive control scheme. First, a rolling warning approach is achieved by the long short-term memory network and fuzzy logic, which provides warning levels and guides decision-making for preventive control. Second, a two-stage optimization scheduling model is proposed, including a day-ahead and an intra-day sub-model. The two-stage scheduling model comprehensively considers power support from interconnectors and preventive control costs. Simulation results demonstrate that the proposed scheme can provide adaptive preventive control strategies for power ramp events with varying risk levels, thereby enhancing the utilization of renewable energy and improving the security of power system.

关键词： Photovoltaic systems Renewable energy sources Adaptation models Costs Simulation Decision making Power system stability Wind power generation Wind forecasting Transient analysis

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