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International Conference on Intelligent computing, Automation and Systems (ICICAS)

作者： Liu Yiyi Chen Wei Lu Dan Wu Junjie Qi Wei State Grid Laboratory of Electric Equipment Noise and Vibration Research State Grid Hunan Electric Power Corporation Research Institute Changsha China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781665428118

Study and prevention of transmission line corona noise has become an important means to effectively promote the environmental friendliness and energy saving of transmission line. Studies have shown that using hydrophilic coating treatment on the conductor surface, so that under the condition of precipitation, the rainwater can be evenly distributed on the conductor surface to reduce the formation density of water droplets, which can weaken the impact of raindrops on the curvature radius of the conductor. As a result, less distorted electric field and soft noise were produced, leading to reduce corona noise ultimately. The greater hydrophilicity of the conductor surface, the more significant the reduction of corona noise is. In this paper, experiments have validated that the modification of nano aluminum oxide by electron beam radiation graft technology can improve its surface reactivity, promote its dispersion and bonding ability in RTV rubber matrix, and then elevate the hydrophobicity, mechanical properties and aging resistance of modified RTV silicone rubber. In addition, specific properties of thermal conductivity and hydrophobicity can be improved by further adding functional monomers.

关键词： power transmission lines Transmission line matrix methods Electron beams Surface resistance Conductors Thermal conductivity Corona

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A Three-step Cooperative Spectrum Sensing Algorithm Based on Historical Sensing Information Prediction

A Three-step Cooperative Spectrum Sensing Algorithm Based on...

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IEEE International Conference on Signal and Image Processing (ICSIP)

作者： Gao Hongjian Lu Yang An Chunyan Huang Biyao Global Energy Interconnection Research Institute Co. Ltd. (GEIRI) Beijing China Electric Power Intelligent Sensing Technology and Application State Grid Corporation Joint Laboratory

ISBN: (纸本)9781665446006

With the proposal of ubiquitous power Internet of things, the demand for the smart grid for spectrum resources is increasing. In order to improve the utilization of spectrum resources, spectrum sensing technology can be applied to the smart grid. Aiming at the problem of poor detection performance of energy detection algorithm in spectrum sensing in the presence of noise uncertainty, a three-step cooperative spectrum sensing (CSS) algorithm based on historical sensing information prediction is proposed. The algorithm divides the decision-making difficulty area caused by noise into three reliability levels and uses fuzzy logic (FL) to make the decision. When the output of FL is uncertain, exponential smoothing prediction (ESP) is used to make the decision on historical information. The analysis results show that, compared with the soft decision and reference algorithm, the proposed algorithm can effectively improve the performance of noise uncertainty and spectrum sensing without increasing the transmission overhead and computational complexity.

关键词： Fuzzy logic Uncertainty Smoothing methods Quantization (signal) Simulation Bit error rate Prediction algorithms

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Cache-Enhanced Task Offloading for eIoT with Mobile Edge computing 10th

Cache-Enhanced Task Offloading for eIoT with Mobile Edge Com...

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10th EAI International Conference on Mobile Networks and Management, MONAMI 2020

作者： Li, Zhifeng Bai, Jie Zhang, Haonan Bai, Wei Cao, Yongmin Wu, Liwen Dong, Jianying Deng, Yanshan State Grid Jibei Tangshan Power Supply Company Tangshan063000 China Electric Power Intelligent Sensing Technology Application State Grid Corporation Joint Laboratory Beijing China Global Energy Interconnection Research Institute Co. Ltd. Beijing102209 China Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9783030640019

With the continuous development and improvement of 5G networks, many emerging technology architectures have been introduced to support 5G service requirements. As one of them, mobile edge computing can meet the exponentially increasing computing requirements, and with its advantages of being more efficient, smarter, and more flexible, it can be well adapted to smart grid scenarios. However, most of the existing research contents of the eIoT focus on the research of computing offloading and content caching separately, ignoring the problem of reusability of some computing results. This paper considers the certain content caching capabilities of the MEC system itself, and aims to design a cache-enhanced MEC eIoT. The model includes offloading, calculating and backhaul for uncached task and downloading of cached content. On the other hand, the problem of task diversity and inspection robot mobility is fully analyzed. Subsequently, we studied the impact of caching capabilities on computing power to get the best MEC server parameter information. Based on the above research, this paper proposes a cache enhanced offload strategy and a collaborative scheduling algorithm to optimize the total delay of all tasks of the inspection robot in the eIoT. Simulation results show that the strategy can effectively reduce the computational offloading latency. © ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2020.

关键词： Mobile edge computing

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An Accurate Model of Magnetic Energy Harvester for Harvesting Maximum power Based on Fitting Method

An Accurate Model of Magnetic Energy Harvester for Harvestin...

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Electrical Engineering (CIYCEE), IEEE China International Youth Conference on

作者： Hui Huang Chunlong Li Kuan Ye Hongjing Liu Huanyu Yang Xin Du Global Energy Interconnection Research Institute Co Ltd and Electric Power Intelligent Sensing Technology and Application State Grid Corporation Joint Laboratory Beijing China State Grid Beijing Electric Power Research Institute Beijing China Standard verification Laboratory for On-site testing technology Beijing China School of Electrical Engineering Southwest Jiaotong university Chengdu China

ISBN: (纸本)9781665400657

The traditional magnetic energy harvester (MEH) model is widely used to calculate the core cross-sectional area and coil turns required for energy harvesting. However, the core cross-sectional area and the number of turns of the coil designed by the model cannot always meet the expected power and voltage requirements. In this work, a fitting method is introduced to correct the traditional model. The correction factor α of calculating sectional area and the correction factor β of calculating coil turns can be obtained under different currents. Then, the correction formula can be derived by substituting the correction factor into the original model. According to the correction model, the sectional area of the core and coil turns can be calculated to meet the target power and voltage requirement. The experimental results show that the maximum difference between the maximum output voltage and the theoretical value is 0.26V, and the maximum difference between the maximum output power and the theoretical value is 0.016W.

关键词： Electrical engineering Magnetic cores Conferences Fitting Voltage Energy harvesting power generation

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power System Sensor Network Routing Clustering Method Based on Particle Swarm Optimization Algorithm

Power System Sensor Network Routing Clustering Method Based ...

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Information Communication Technologies Conference (ICTC)

作者： Wei Bai Yang Lu Di Zhai Bowen Liu Letian Li Suxing Zhu Electric Power Intelligent Sensing Technology and Application State Grid Corporation Joint Laboratory Global Energy Interconnection Research Institute Co. Ltd. (GEIRI) Beijing China Beijing Jiaotong University Beijing China

In order to balance the transmission efficiency and energy consumption of the power system sensor network, we proposed an algorithm that improved the parameter adjustment mode of the particle swarm optimization (PSO) algorithm. To complete effective routing and clustering, and to extend the lifetime of the network, we analyze the energy level and transmission status of sensor nodes and other parameters. The simulation results show that the solution has a more balanced energy consumption while meeting the data transmission efficiency of power system equipment.

关键词： Energy consumption Simulation Clustering methods Clustering algorithms Routing Energy states Communications technology

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Channel Modeling of BPLC at Customer Side Based on Parameter Estimation

Channel Modeling of BPLC at Customer Side Based on Parameter...

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International Conference on Communication technology (ICCT)

作者： Hongjian Gao Yang Lu Yao Liu Qiang Wang Guangcheng Xie Jianqi Li Electric Power Intelligent Sensing Technology and Application State Grid Corporation Joint Laboratory Global Energy Interconnection Research Institute Co. Ltd. Beijing China National Engineering Lab for Mobile Network Technologies Beijing University of Posts and Telecommunications Beijing China Marketing Service Center State Grid Chongqing Electric Power Company Chongqing China

ISBN: (纸本)9781665432078

power line communication (PLC) is a unique communication mode of the power grid. It has the advantages of no need for communication channel construction, flexible deployment, convenient operation, and maintenance. This paper analyzes the influence of basic characteristics of distribution network at customer side on broadband PLC (BPLC) channel (0.5 ~ 20MHz), including line branch, cable length, and power load. Then, we fitted the real data of typical urban distribution networks in China and the nonlinear least square method. The results show that the average attenuation model can not accurately represent the characteristics of the BPLC channel. As a result, the multipath model of BPLC is then developed, which has a good description ability for BPLC at the customer side with lower RMSE and lays a foundation for the further research and application of BPLC application technology.

关键词： Parameter estimation power cables power line communications Channel estimation Distribution networks Maintenance engineering Attenuation

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Research on Mixed Transaction Analytical Data Management Oriented to Data Middle Platform

Research on Mixed Transaction Analytical Data Management Ori...

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Symposium of Image, Signal Processing, and Artificial Vision (STSIVA)

作者： Ai-Hua Zhou Li-Peng Zhu Meng-Han Xu Sen Pan Jun-Feng Qiao Hong-Bin Qiu Song Deng Global Energy Interconnection Research Institute Co. LTD Artificial Intelligence on Electric Power System State Grid Corporation Joint Laboratory (GEIRI) Beijing China State Grid Jiangsu Electric Power Co. LTD. Information & Telecommunication Branch Nanjing China Institute of Advanced Technology Nanjing University of Posts & Telecommunications Nanjing China

ISBN: (纸本)9781665426565

To solve the problem of non-synchronization between enterprise application development and data development, this paper puts forward the concept of data middle platform, which combines the two data processing mechanisms of online analytical processing (OLAP) and online transaction processing (OLTP), so that faster and better data services can be provided to the foreground business. On this basis, this paper summarizes the research status of the related technologies of the data middle platform, including the architecture of the data middle platform and the key technologies of constructing the data middle platform. In-depth analysis of the business scale and business characteristics of OLTP and OLAP in various application scenarios, focusing on the technical difficulties in the application process of OLTP and OLAP in the application scenario. Finally, it summarizes the challenges faced by the basic research from three aspects: the construction of data middle platform, data quality assurance, and the application of mixed-thing analytical data management.

关键词： Data integrity Conferences Focusing Computer architecture Data processing Market research Data models

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Piezoelectric,ferroelectric and pyroelectric properties of(100−x)Pb(Mg_(1/3)Nb_(2/3))O_(3−x)PbTiO_(3)ceramics

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Journal of advanced Dielectrics 2022年第3期12卷 11-16页

作者： Chuan Chen Yan Wang Jiajiu Li Chaofeng Wu Guanrong Yang Electric Power Intelligent Sensing Technology and Application State Grid Corporation Joint Laboratory Future Science Park Changping District102209 BeijingP.R.China Department of Electric Power Sensing Technology Global Energy Interconnection Research Institute co.Ltd.Future Science ParkChangping District102209 BeijingP.R.China Foshan(Southern China)Institute for New Materials Nanhai District528200 FoshanP.R.China Center of Advanced Ceramic Materials and Devices Yangtze Delta Region Institute of Tsinghua University 314006 ZhejiangP.R.China

A series of(100−x)Pb(Mg_(1/3)Nb_(2/3))O_(3−x)PbTiO_(3)(PMN−xPT,x=24,25,26)ceramics were prepared by solid-state reaction technique using MgNb_(2)O_(6)*** results of the detailed characterizations reveal that the content of PT has negligible influence on the grain size,and all samples possess the perovskite *** the PT content increases,the samples changed from the normal ferroelectric phase to the ergodic relaxor state at room *** a result,PMN-xPT ceramics are endowed with electro-strain of 0.08%at a relatively low electric field of 2 kV/mm,and effective piezoelectric coefficient of 320 pm/V was ***,the PMN-xPT ceramics have exceptional pyroelectric performance,exhibiting a high pyroelectric coef-ficient p~5.5-6.3×10^(−8)C·cm^(−2)·K^(−1).This study demonstrates the great potential of PMN-xPT for piezoelectric and pyroelectric device applications.

关键词： Perovskite PMN-PT electro-strain ferroelectric phase

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A security scheme for intelligent substation communications considering real-time performance

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Journal of Modern power Systems and Clean Energy 2019年第4期7卷 948-961页

作者： Jie ZHANG Jun’e LI Xiong CHEN Ming NI Ting WANG Jianbo LUO Key Laboratory of Aerospace Information Security and Trusted Computing Ministry of EducationSchool of Cyber Science and EngineeringWuhan UniversityWuhan 430072China NARI Group Corporation(State Grid Electric Power Research Institute) Nanjing 211106China NARI Technology Co.Ltd. Nanjing 211106China State Key Laboratory of Smart Grid Protection and Control Nanjing 211106China

Tampering,forgery and theft of the measurement and control messages in a smart grid could cause one breakdown in the power ***,no security measures are employed for communications in intelligent *** services in an intelligent substation have high demands for real-time performance,which must be considered when deploying security *** paper studies the security requirements of communication services in intelligent substations,analyzes the security capabilities and shortages of IEC 62351,and proposes a novel security scheme for intelligent substation *** security scheme covers internal and telecontrol communications,in which the real-time performance of each security measure is *** this scheme,certificateless public key cryptography(CLPKC)is used to avoid the latency of certificate exchange in certificate-based cryptosystem and the problem of key escrow in identity-based cryptosystem;the security measures of generic object-oriented substation event,sampled measure value and manufacturing message specification in IEC 62351 are improved to meet the real-time requirements of the messages as well as to provide new security features to resist repudiation and replay attacks;and the security at transport layer is modified to fit CLPKC,which implements mutual authentication by exchanging ***,a deployment of CLPKC in an intelligent substation is *** also evaluate the security properties of the scheme and analyze the end-to-end delays of secured services by combining theoretical calculation and simulation in this *** results indicate that the proposed scheme meets the requirements of security and real-time performance of communications in intelligent substations.

关键词： Intelligent substation Security measures Certificateless public key cryptography(CLPKC) Real-time communication IEC 62351

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Entropy Enhanced AHP Algorithm for Heterogeneous Communication Access Decision in power IoT Networks

Entropy Enhanced AHP Algorithm for Heterogeneous Communicati...

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作者： Yao Wang Yun Liang Hui Huang Chunlong Li Global Energy Interconnection Research Institute Co. Ltd. Electric Power Intelligent Sensing Technology and Application State Grid Corporation Joint Laboratory

In this paper, the importance of the coverage, security, transmission delay, service rate and cost in each heterogeneous wireless network to the power business is comprehensively analyzed from the perspective of business preference of power distribution communication and the objective conditions of 5 G heterogeneous network. The weight distribution of each network attribute for different business is more accurately obtained by using the entropy enhanced AHP and method. The performance ranking of each network provides a scientific, objective, accurate and optimized selection scheme for the power distribution communication service. Compared with other algorithms, the proposed algorithm shows better performance in term of blocking rate.

关键词： power IoT networks 5G Heterogeneous model Access mode

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