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Plasma Science and Technology 2024年第2期26卷 77-85页

作者：何旺龄魏宏宇张胤禄刘永聪刘云鹏万保权周阳王延召干喆渊 Hebei Key Laboratory of Green and Efficient New Electrical Materials and Equipment North China Electric Power UniversityBaoding 071000People's Republic of China State Grid Suzhou Power Supply Company Suzhou 215000People's Republic of China State Key Laboratory of Power Grid Environmental Protection(China Electric Power Research Institute) Wuhan 430000People's Republic of China

The corona discharge from transmission lines in high-altitude areas is more severe than at lower altitudes. The radio interference caused thereby is a key factor to be considered when designing transmission lines. To study the influence of altitude on negative corona characteristics, an experimental platform comprising a movable small corona cage was established: experiments were conducted at four altitudes in the range of 1120-4320 m, and data on the corona current pulse and radio interference level of 0.8-mm diameter fine copper wire under different negative voltages were collected. The experimental results show that the average amplitude, repetition frequency and average current of the corona current pulse increase with increasing altitude. The dispersion of pulse amplitude increases with increase in altitude, while the randomness of the pulse interval decreases continuously. Taking the average current as an intermediate variable,the relationship between radio interference level and altitude is obtained. The result of this research has some significance for understanding the corona discharge characteristics of ultra-highvoltage lines.

关键词： altitude negative corona corona current pulse radio interference level

Simulations and experiments of the generation apparatus of the DC electric field with the space charge

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High Voltage 2021年第6期6卷 1061-1068页

作者： Yanzhao Wang Jiangong Zhang zheyuan gan Jilai Xu High Voltage Department China Electric Power Research InstituteState Key Laboratory of Power Grid Environmental ProtectionWuhanHubeiChina

To make accurate measurements,field mills must be calibrated in a known DC electric field space charge in which the quantities can be control1ed.A simulation model of the generation apparatus of the electric field with a space charge has been *** on the combination of the electric field and the transfer of a dilute substances model,the in-fluence of openings in the metal screen was *** results showed that the opening size of the high‐voltage electrode has a great influence on the distribution of the electric field and ion density at the calibration ***,a generation apparatus was designed and developed and ion mobility was *** experimental results showed that ion mobility decreased with an increase in electric field ***,ion mobility tends to be saturated when the electric field reaches a certain critical *** fitting formulas of ion mobility of positive and negative charge are proposed that can be used to predicate ion mobility in a high electric field.

关键词： apparatus field Simulation

Dispersion characteristics of switching transients from large‐scale experiments in a 1100 kV gas insulated switchgear circuit

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High Voltage 2023年第6期8卷 1253-1263页

作者： Zihan Teng Weijiang Chen Jiangong Zhang Baoquan Wan Jun Zhao Kejie Li Zhenghai Liao zheyuan gan State Key Laboratory of Power Grid Environmental Protection China Electric Power Research InstituteWuhanChina State Grid Corporation of China BeijingChina School of Electrical Engineering and Automation Hefei University of TechnologyHefeiChina

The switching operation of gas insulated switchgear(GIS)disconnector will produce multiple random spark discharges between the gas gaps of the *** spark discharge can be affected by various random factors,such as trapped charge on the load side,the initial operating phase,gap distance and operating speed of the disconnector,leading to dispersion *** present,some studies have mentioned this dispersion,but its impact is still unclear due to the lack of experimental data,resulting in a deviation between the simulation results and the measured *** this study,thousands of switching operations were carried out based on the 1100 kV full‐scale GIS circuit in Wuhan ultra‐high voltage alternating current Test *** maximal information coeffi-cient analysis,linear regression fitting and other statistical methods were used to discuss the dispersion characteristics of very fast transient overvoltage(VFTO)and transient enclosure voltage(TEV)from large‐scale experimental *** results show that the dispersion of VFTO and TEV in amplitude aspects both increase gradually as the breakdown voltage increases,with the maximum difference of five times of TEV amplitude at normalised breakdown *** terms of frequency characteristics,the dispersion of different fre-quency components in TEV is always greater than that of VFTO,especially for the high‐frequency ***,by comparing the frequency characteristics of TEV at different positions,we notice that the dispersion is almost independent of the spatial po-sition but only determined by the randomness of spark *** discoveries reveal the importance of the dispersion in switching transients and make up for the lack of theoretical understanding of the correlation among them.

关键词： characteristics transient breakdown

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特高压输电线路电磁干扰3维可视化研究

高电压技术 2014年第12期40卷 3874-3881页

作者：尹晖张晓鸣王艳涛干喆渊武汉大学测绘学院武汉430079 中国电力科学研究院武汉430074

为直观描述特高压(UHV)输电线路电磁散射空间分布及其对周边敏感设施的影响,针对特高压输电线路电磁散射高效模型对无线电台(站)干扰仿真和防护设计平台建设的需要,采用组件地理信息系统(GIS)开发技术,以VS 2010(C#语言)为平台、Arc Eng... 详细信息

为直观描述特高压(UHV)输电线路电磁散射空间分布及其对周边敏感设施的影响,针对特高压输电线路电磁散射高效模型对无线电台(站)干扰仿真和防护设计平台建设的需要,采用组件地理信息系统(GIS)开发技术,以VS 2010(C#语言)为平台、Arc Engine(AE)10.0组件为工具,实现了特高压交流试验示范工程输电线路电磁干扰(EMI)云图的3维可视化。采用特定数据接口进行电磁干扰计算,并将计算结果以电磁干扰云图(等位线图)的方式展示在输电线路3维场景中。研究结果表明:3维可视化技术可以将输电线路电磁干扰结果以更形象、直观的方式呈现给用户,并可以进行输电线路与周边敏感点的空间距离量测和干扰场强大小查询,是电力系统和3维GIS新的结合点。

关键词：地理信息系统 Arc Engine组件 3维可视化特高压输电线路电磁干扰云图

不同空间域七参数选取对坐标系转换的影响研究

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测绘通报 2015年第2期 10-13页

作者：田鑫尹晖干喆渊武汉大学测绘学院湖北武汉430079 中国电力科学研究院湖北武汉430074

深入分析并论述了在小区域内用已知点解算出的七参数得到的转换坐标与用测绘部门给定的大区域七参数直接解算得到的转换坐标的差异,得出大区域转换七参数与小区域转换七参数转换坐标之间存在的关系。

关键词：区域转换七参数坐标转换 WGS-84坐标系 1980西安坐标系

Atomically dispersed materials:Ideal catalysts in atomic era

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Nano Research 2024年第1期17卷 18-38页

作者： Tao gan Dingsheng Wang Department of Chemistry Tsinghua UniversityBeijing 100084China

Catalysts can accelerate the chemical reaction rate and effectively promote the molecules transformation,which is of great significance in the research of chemical industry and material *** extreme utilization of reactive sites has led to the emergence and development of atomically dispersed materials(ADMs).The highly active coordination unsaturated metal sites and fully utilized metal atoms make ADMs show great potential in catalytic *** adjustment of coordination environment and electronic structure provides more possibilities for constructing reactive centers with different *** review summarized the application and research progress of ADMs in different *** design strategy and structure–activity relationship of ADMs for specific reactions were summarized and ***,we also provided advices for the challenges and opportunities faced by ADMs in catalytic reactions.

关键词： atomically dispersed materials catalysis organic synthesis battery sensor enzyme

Progress Report on ASO-S: 2022–2024

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空间科学学报 2024年第4期44卷 687-689页

作者： gan Weiqun Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023

The Advanced Space-based Solar Observatory(ASO-S)marked China's first comprehensive solar mission in *** upon the previous reports covering 2018-2020 and 2020-2022,we present here an update on the ASO-S made from 2022 to *** August 2022,ASO-S completed its Phase D study and was successfully launched on October 9,*** commissioning phase was carried out and concluded within the first nine months following the *** data and associated analysis software have been opened to the community and the research on the early ASO-S data has been well *** anticipate also the achievements in data research pertaining to ASO-S in the near future.

关键词： Space astronomy Solar physics Spacecraft

Distributed Least Squares Algorithm of Continuous-Time Stochastic Regression Model Based on Sampled Data

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Journal of Systems Science & Complexity 2024年第2期37卷 609-628页

作者： ZHU Xinghua gan Die LIU Zhixin The Key Laboratory of Systems and Control Academy of Mathematics and Systems ScienceChinese Academy of Sciencesand School of Mathematical SciencesUniversity of Chinese Academy of SciencesBeijing 100190China Zhongguancun Laboratory Beijing 100094China

In this paper,the authors consider the distributed adaptive identification problem over sensor networks using sampled data,where the dynamics of each sensor is described by a stochastic differential *** minimizing a local objective function at sampling time instants,the authors propose an online distributed least squares algorithm based on sampled data.A cooperative non-persistent excitation condition is introduced,under which the convergence results of the proposed algorithm are established by properly choosing the sampling time *** upper bound on the accumulative regret of the adaptive predictor can also be ***,the authors demonstrate the cooperative effect of multiple sensors in the estimation of unknown parameters by computer simulations.

关键词： Cooperative excitation condition distributed least squares regret sampled data stochastic differential equation

±500 kV直流输电系统电磁环境调查研究

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高电压技术 2006年第9期32卷 146-148,152页

作者：干喆渊邬雄张广洲路遥周文俊武汉大学电气工程学院武汉430072 国网武汉高压研究院武汉430074

为考虑我国直流特高压输电工程的电磁环境保护问题,调查了国内已有4条±500 kV高压直流输电线路电磁环境。根据问卷调查及实地测量给出了相应的调查结果以及由实测数据统计得出一些典型情况的合成场、离子流场大小及分布规律;通过与国... 详细信息

为考虑我国直流特高压输电工程的电磁环境保护问题,调查了国内已有4条±500 kV高压直流输电线路电磁环境。根据问卷调查及实地测量给出了相应的调查结果以及由实测数据统计得出一些典型情况的合成场、离子流场大小及分布规律;通过与国际相关的限值标准比较,得出我国目前直流输电线路合成电场及离子流场对人体安全的结论,可供±800 kV特高压直流输电参考。

关键词：高压直流电磁环境合成场离子流场输电线路

应用时域积分法的变电站内开关操作空间电磁场分析

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华北电力大学学报（自然科学版） 2018年第2期45卷 70-74页

作者：张建功赵军干喆渊中国电力科学研究院湖北武汉430074

为了提供一种更加简单且计算结果可靠的计算变电站内开关操作空间电磁场的方法,应用了近似计算公式推导出空间电场的计算公式,计算了任意波形下的雷电感应过电压在空间产生的水平电场,通过时域积分方程法求解其散射场,求解了雷击架空输... 详细信息

为了提供一种更加简单且计算结果可靠的计算变电站内开关操作空间电磁场的方法,应用了近似计算公式推导出空间电场的计算公式,计算了任意波形下的雷电感应过电压在空间产生的水平电场,通过时域积分方程法求解其散射场,求解了雷击架空输电线路时在线路上产生的感应过电压。建立了水平电场与线路的时域积分方程,将导线轴向电流作为变量,取脉冲函数作为基函数,在时间和空间维度上均采用匹配离散方程,将得到的线性方程组应用时间步进算法进行求解。本方法计算过程简单,并通过具体实例验证了使用该方法时,其计算结果与相关文献结论一致。

关键词：感应雷过电压时域积分方程法矩量法架空输电线路