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International Wireless Communications and Mobile Computing Conference, IWCMC

作者： Jiangang Lu Jiajia Fu Ying Zeng Linna Ruan Electric Power Dispatching Control Center of Guangdong Power Grid Co. Ltd. Guangzhou China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China

In order to solve the problem of long diagnosis time for fault diagnosis algorithms in large-scale environments, this paper proposes a service fault location algorithm based on network characteristics. First, based on the virtual network mapping data, the service is associated with the underlying resources to build a Bayesian fault location model. Second, by analyzing the network topology and the running status of each service, the probability of network node failure is calculated based on the multi-attribute characteristics. Finally, the fault location is achieved by calculating the set of suspected faults with the strongest ability to explain abnormal symptoms. The experimental part compares the algorithm of this paper with the classical algorithm, and verifies that the algorithm of this paper improves the accuracy of fault diagnosis and reduces the time cost of fault diagnosis.

关键词： Wireless communication 5G mobile communication Network topology Network slicing Heuristic algorithms Fault location Dynamic scheduling

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Modeling and analysis of industrial power load based on measured data 4

Modeling and analysis of industrial power load based on meas...

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2020 4th International Conference on Electrical, Mechanical and Computer Engineering, ICEMCE 2020

作者： Yan, Zhang Huajia, Wang Danwen, Yu Gaofeng, Zhang Weichao, Li State Grid Shandong Electric Power Research Institute Jinan250003 China Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan250061 China

With the rapid development of electronic technology, the construction of smart grids has been accelerated. Establishing an accurate load model is of great significance to the stability of distribution network system. Some large-capacity installations with more harmonics and impact, such as electric arc furnaces and wind farm are connected to the grid, which has a serious impact on the power quality of the distribution network. This paper adopts a method of industrial load modeling based on the fitting of measured data, selects electric arc furnace and aluminum rolling mill as typical industrial loads, establishes its model through fitting the measured data, which proves the reliability and accuracy of the load model. © Published under licence by IOP Publishing Ltd.

关键词： Aluminum rolling mills

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The 110kV Live-Maintaining Robot control System Design for Substation Equipment in Complex Working Conditions

The 110kV Live-Maintaining Robot Control System Design for S...

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Chinese control Conference (CCC)

作者： Chenyu Hu Xin Chen Chengyu Li Guangxian Huang Cheng Zhou Xu Jian School of Automation China University of Geosciences Wuhan China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Wuhan China School of Future Technology China University of Geosciences Wuhan China Distribution Department State Grid Hubei Electric Power Co. Ltd. Xianning Power Supply Company Xianning China Operations and Maintenance Department State Grid Hubei Electric Power Co. Ltd Xianning Xian'an District Power Supply Company Xianning China Equipment Technology Center State Grid Hubei Electric Power Co. Ltd. Electric Power Science Research Institute Wuhan China Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Wuhan China

Live-maintaining work is essential for continuous power supply to the substation. To improve the safety and efficiency of live-maintaining work, this paper proposes an equipotential live-maintaining robot system suitable for 110kV voltage levels. Considering the narrow space, complex working conditions and strong electromagnetic interference in substations, binocular vision technology, manipulator trajectory planning algorithm based on time-energy optimization, high voltage electromagnetic shielding technology are utilized to develop the system, and the live-maintaining robot is successfully applied in actual substation. By accurately identifying and locating the joint bolts and insulator, the robot system can achieve equipotential live-disassemble, live-assemble the joint bolts within 18 minutes and live-clean insulator within 5 minutes, demonstrating its the effectiveness and practicability.

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Application Case of Transient Energy Method in Location of Single Phase to Ground Fault

Application Case of Transient Energy Method in Location of S...

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2020 IEEE/IAS Industrial and Commercial power System Asia, I and CPS Asia 2020

作者： Wei, Xie Xuewen, Wang Hengxu, Zhang Fang, Shi Xiaodong, Xing Baicong, Sun Chen, Fang State Grid Shanghai Municipal Electric Power Company Shanghai China Shandong University Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Jinan China State Grid Shanghai Electric Power Research Institute Shanghai China

ISBN: (纸本)9781728143033

The distribution networks in China and many other countries are mostly neutral inefficiently grounding systems (NIGS), and more than 80% of the faults in the distribution networks are single phase to ground (SPG) faults. Due to the weak fault current and imperfect detection equipment configuration, the faulted line section location methods of the SPG fault in NIGS has not been effectively resolved. The development and application of \muM-PMU provides more comprehensive fault information support for fault diagnosis of distribution network. When a SPG fault occurs, the transient energy of the faulted line section is greater than the sum of the transient energy of other line sections. A faulted line section location algorithm based on transient energy is proposed. The algorithm is implemented and embedded in the master station, and the corresponding interface is designed. A field test plan was designed and implemented in a 35kV distribution network. The test results show that the algorithm can locate the faulted line section efficiently. © 2020 IEEE.

关键词： Location

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Design and Improvement of Anti-Bird Devices for Transmission Line Towers 7

Design and Improvement of Anti-Bird Devices for Transmission...

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7th International Conference on Information, Cybernetics, and Computational Social Systems, ICCSS 2020

作者： Mo, Juhuai Chen, Yiping Zhang, Yu Lan, Weisong Lei, Jiawen The Jiangmen Power Supply Bureau of Guangdong Power Grid Jiangmen China School of Automation Guangdong University of Technology Guangdong Provincial Key Laboratory of Intelligent Decision and Cooperative Control Guangzhou China

ISBN: (纸本)9781728162461

With the improvement of the ecological environment, transmission line failures caused by bird activities occur from time to time especially in the spring, which have become one of the main threats to the operational safety of transmission lines. In order to avoid this kind of transmission line failure, different types of anti-bird devices including anti-bird cage, man-made nest, and anti-bird thorn are installed on the import parts of transmission line towers which are seriously affected by bird activities. However, because the anti-bird devices are mostly produced and installed manually, there are many gaps between devices and towers after installation, which make these devices not very effective. In this paper, first, a variable-angle anti-bird cage is designed to effectively eliminate the error gap between device and tower on the side. Furthermore, by modeling for middle-phase angle steel of tower, the problem of sealing between two middle-phase anti-bird cages is solved. Second, because the existing man-made nest is so large and heavy that it is difficult to bring to the transmission line tower, a kind of folding man-made nest is designed to facilitate the installation. Finally, enlightened by the structure and the close mechanism of umbrella, an inverted umbrella-shaped retractable anti-bird thorn is designed to facilitate the installation and to reduce the impact of anti-bird thorn on operation and maintenance of the transmission line. © 2020 IEEE.

关键词： Birds

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Fault Location Method for μPMU-Based Distribution Networks

Fault Location Method for μPMU-Based Distribution Networks

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Electrical Engineering and Automation (IFEEA), International Forum on

作者： Lei Wang Lin Niu Fengyuan Zhou Zhanjun Gao Power Grid Maintenance Training Department State Grid of China Technology College Jinan China Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Shandong University Jinan China

With the development of communication technology and the wide-area measurement system, the prospect of incorporating active distribution networks (ADNs) with micro phasor measurement units (μPMUs) to obtain integrated system information for state estimation and fault location, is becoming increasingly promising. This paper presents a fault location method for ADNs with finite μPMUs. First, the configuration of the μPMUs is optimized to ensure that the entire distribution network is considered and that the global phasor information can be comprehensively utilized. The fault section detection criterion for the unbalanced current component amplitude comparison, is used to locate the fault. Utilizing PSCAD/EMTDC and MATLAB, it is verified that this method is not affected by the fault location and is suitable for multi-type faults and extreme disturbance. This method exhibits a high resilience to transition resistance and is robust when employed in the improved IEEE 33-node test system.

关键词： Resistance Distribution networks Fault location Phasor measurement units Permeability Wide area measurements State estimation

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Service Fault Diagnosis Algorithm of Noise Network under 5G Network Slice

Service Fault Diagnosis Algorithm of Noise Network under 5G ...

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International Wireless Communications and Mobile Computing Conference, IWCMC

作者： Jiajia Fu Ying Zeng Zanhong Wu Song Kang Electric Power Dispatching Control Center of Guangdong Power Grid Co. Ltd. Guangzhou China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China

In order to solve the problems of low fault diagnosis accuracy and high false alarm rate in noisy environment, this paper proposes a service fault diagnosis algorithm of noise network under 5G network slice. First, the relationship between the service and the underlying network resources based on the mapping relationship, and fault diagnosis model are established. Secondly, in order to reduce the negative impact of network noise on the fault diagnosis algorithm, the fault propagation model is optimized based on the number of simultaneous faults and the value of the failure rate of each link. Finally, the fault set with the largest interpretation ability is selected as the fault set. In the experimental part, it is verified that the algorithm in this paper improves the accuracy of fault diagnosis and reduces the false alarm rate.

关键词： Fault diagnosis Wireless communication 5G mobile communication Network slicing Fault location Noise measurement Mobile computing

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Data Quality Improvement Method of Distributed PV Generation Based on Time Correlation and Spatial Correlation

Data Quality Improvement Method of Distributed PV Generation...

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第33届中国控制与决策会议

作者： Min CAO Zhifeng LIANG Zhi LI Yi QU Kaifeng ZHANG Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of EducationSoutheast University National Electric Power Dispatching and Control Center Department of Dispatch Center State Grid Anhui Electric Power Co. Ltd.

In order to solve the problem of data anomaly and data missing in distributed photovoltaic(PV) active power,this paper proposes a data quality improvement method based on time correlation and spatial *** terms of anomaly detection,back propagation(BP) neural network is used to establish a correlation model based on the correlation among active power and meteorological data on the time scale,and the difference method is used to detect and eliminate anomaly *** terms of missing data repair,Random Forest is used to establish a correlation model based on the spatial correlation among active power of power station to be repaired and its surrounding power station's,and the direct repair method is adopted to repair the missing *** experimental results show that the anomaly detection method based on time correlation can achieve an AUC value of more than 0.93,and the repair method based on spatial correlation can achieve more accurate repair results.

关键词： Distributed Photovoltaic Correlation Data Quality Improvement

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Dynamic Network Fault Diagnosis Algorithm under 5G Network Slice

Dynamic Network Fault Diagnosis Algorithm under 5G Network S...

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International Wireless Communications and Mobile Computing Conference, IWCMC

作者： Hongyuan Zheng Jiangang Lu Zhan Shi Yuhang Chen Keqin Zhang Electric Power Dispatching Control Center of Guangdong Power Grid Co. Ltd. Guangzhou China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China

In order to solve the problem of low accuracy of fault diagnosis algorithms caused by increased network dynamics, this paper proposes a dynamic network fault diagnosis algorithm under 5G network slices. By calculating the failure credibility of each link, a clustering algorithm is used to cluster the symptoms to correct the false symptoms. When constructing the fault propagation model, the time slice t is added to the fault propagation model, thereby depicting different network models in different time slices. Finally, locate the fault by solving the original state and current state of the faulty node. The experimental part compares the algorithm of this paper with the existing algorithm, and verifies that the algorithm of this paper improves the performance of the fault diagnosis algorithm.

关键词： Fault diagnosis Wireless communication 5G mobile communication Heuristic algorithms Network slicing Clustering algorithms Predictive models

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Multi-objective partition planning for multi-infeed HVDC system

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Global Energy Interconnection 2021年第1期4卷 81-90页

作者： Zhao Yu Shuanbao Niu Chao Huo Ning Chen Kaige Song Xiaohui Wang Yu Bai State Grid Corporation of China Beijing100031P.R.China Northwest Branch State Grid Corporation of ChinaXi’an710048P.R.China National Key Laboratory of Operation and Control of Renewable Energy and Energy Storage China Electric Power Research Institute(Nanjing)Nanjing210003P.R.China Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong UniversityJinan250061P.R.China Langfang Power Supply Company State Grid Jibei Electric Power Company LimitedLangfang 065000P.R.China

The close proximity and the necessity of coordination between multiple high-voltage direct currents(HVDCs)raise the issue of grid partitioning in multi-infeed HVDC systems.A multi-objective partition strategy is proposed in this *** types of relationships to be coordinated and complemented are analyzed and formulated using quantitative *** to the graph theory,the HVDC partition is transformed into a graph-cut problem and solved via the spectral clustering ***,the proposed method is validated for a practical multi-HVDC grid,confirming its feasibility and effectiveness.

关键词： Multi-infeed HVDC system grid partition Multi-objective planning Spectral clustering

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