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Research on Reliability of Relaying Protection in Smart Substation

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World Journal of Engineering and Technology 2019年第2期7卷 333-338页

作者： Kai Wang wanqing li Department of Electrical Engineering and Automation College of Electrical Engineering & New Energy China Three Gorges University Yichang China

Research on reliability of relaying protection in smart substation not only has a positive effect on the rational configuration scheme of relaying protection in smart substation, but also can promote the stability and safety of the overall operation of power system. There are many reliability strategies for relaying protection in smart substation. In practice, the key points of relaying protection should be clarified. Based on the reality, the protection configuration should be strengthened;the voltage limited delay should be used for protection, and the protection configuration scheme of actual lines should be paid attention to, so as to improve the reliability of relaying protection in smart substation and promote the realization of stable and sustainable development of power system and smart substation.

关键词： Smart Substation Relaying Protection Reliability

Overview of Analysis on State Evaluation of Relaying Protection System

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Journal of Power and Energy Engineering 2019年第5期7卷 1-7页

作者： wanqing li Pinduan Hu Department of Electrical Engineering and Automation College of Electrical Engineering & New Energy China Three Gorges University Yichang China Department of Smart Grid College of Electrical Engineering & New Energy China Three Gorges University Yichang China

With the rapid development of the smart grid, it is necessary to do good corresponding work in relaying protection so as to meet the overall requirements of the smart grid better. So we must focus on the state division, risk analysis and fault diagnosis methods in the relaying protection system, in the basis of fully understanding the advantages and disadvantages of relaying protection system, and then improve the problems existing of relaying protection system at this stage according to the actual situation. This paper aims at the overview of analysis on state evaluation of relaying protection systems.

关键词： Relaying Protection System State Evaluation Research Overview

Application of Electrical Automation Technology in Power System

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Journal of Power and Energy Engineering 2019年第5期7卷 8-13页

作者： Kai Wang wanqing li Department of Electrical Engineering and Automation College of Electrical Engineering & New Energy China Three Gorges University Yichang China

With the continuous development and progress of science and technology in China, automation technology has occupied an important position in many fields while its application in power system is increasingly widespread. Therefore, the application of electrical automation technology in power system is of great significance for power supply stability and work efficiency. In this paper, the author analyzes the application of electric automation technology in power system and makes contributions to the sustainable and stable development of power enterprises.

关键词： Power System Electrical Automation Technology Application

Progress in Analysis of Key Technologies for Dynamic Wireless Charging of Electric Vehicles

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Energy and Power Engineering 2019年第5期11卷 201-208页

作者： wanqing li Kai Wang Pinduan Hu Department of Electrical Engineering and Automation College of Electrical Engineering & New Energy China Three Gorges University Yichang China Department of Smart Grid College of Electrical Engineering & New Energy China Three Gorges University Yichang China

At present, electric vehicles are very common means of transportation in our life. Contact charging is the main method of electric vehicles in China. With the continuous improvement of people’s awareness of environmental protection, wireless charging technology is also under constant development. Currently, there are more static wireless charging technologies, while dynamic charging mode is only a perfection and supplement to it, which is crucial to the promotion of electric vehicles and is able to make charging work faster and easier. China has been researching dynamic wireless charging technology, but it has been affected by many factors. Therefore, it is necessary for the relevant personnel to solve the existing obstacles according to the characteristics of dynamic wireless charging technology and apply dynamic wireless charging technology in an efficient manner.

关键词： Electric Vehicle Dynamic Wireless Charging Key Technology

A Resistant Quantum Key Exchange Protocol and Its Corresponding Encryption Scheme

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China Communications 2014年第9期11卷 124-134页

作者： MAO Shaowu ZHANG Huanguo WU wanqing liU Jinhui li Shuanbao Wang Houzhen Computer School of Wuhan University The Key Laboratory of Aerospace Information Security and Trusted Computing Ministry ofEducation Wuhan 430072 Hubei Province P. R. China

The emergence of quantum computer will threaten the security of existing public-key cryptosystems, including the Diffie Hellman key exchange protocol, encryption scheme and etc, and it makes the study of resistant quantum cryptography very urgent. This motivate us to design a new key exchange protocol and eneryption scheme in this paper. Firstly, some acknowledged mathematical problems was introduced, such as ergodic matrix problem and tensor decomposition problem, the two problems have been proved to NPC hard. From the computational complexity prospective, NPC problems have been considered that there is no polynomial-time quantum algorithm to solve them. From the algebraic structures prospective, non-commutative cryptography has been considered to resist quantum. The matrix and tensor operator we adopted also satisfied with this non-commutative algebraic structures, so they can be used as candidate problems for resisting quantum from perspective of computational complexity theory and algebraic structures. Secondly, a new problem was constructed based on the introduced problems in this paper, then a key exchange protocol and a public key encryption scheme were proposed based on it. Finally the security analysis, efficiency, recommended parameters, performance evaluation and etc. were also been given. The two schemes has the following characteristics, provable security,security bits can be scalable, to achieve high efficiency, quantum resistance, and etc.

关键词： ergodic matrix tensor problem resist quantum key exchange protocol encryption

一个求解不可微凸优化问题的Perry-Shanno无记忆拟牛顿型方法

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应用数学 2022年第4期35卷 880-891页

作者：李婉卿欧宜贵海南大学理学院海南海口570228

结合Perry-Shanno无记忆拟牛顿法、改进的线搜索方案和Moreau-Yosida正则化技术,本文提出一个可实施的求解不可微凸优化问题的Perry-Shanno无记忆拟牛顿型方法.在合理的假设下,我们建立了方法的整体收敛性.初步的数值实验结果表明了该... 详细信息

结合Perry-Shanno无记忆拟牛顿法、改进的线搜索方案和Moreau-Yosida正则化技术,本文提出一个可实施的求解不可微凸优化问题的Perry-Shanno无记忆拟牛顿型方法.在合理的假设下,我们建立了方法的整体收敛性.初步的数值实验结果表明了该方法的有效性.

关键词：非光滑优化 Moreau-Yosida正则化 Perry-Shanno无记忆拟牛顿法全局收敛性

城乡融合下民宿产业集群赋能乡村振兴的内在逻辑及实践路径——基于西南地区的多案例分析

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西南民族大学学报（人文社会科学版） 2024年第1期45卷 38-45页

作者：吕宛青余正勇云南大学工商管理与旅游管理学院

以民宿产业集群作为城乡融合产业载体有助于重塑新型城乡关系和推动乡村全面振兴。文章基于对民宿产业集群发展赋能乡村振兴的逻辑框架建构,通过羊茸村等西南地区多案例研究,分析民宿产业集群多维度赋能乡村振兴的实践路径。研究认为:... 详细信息

以民宿产业集群作为城乡融合产业载体有助于重塑新型城乡关系和推动乡村全面振兴。文章基于对民宿产业集群发展赋能乡村振兴的逻辑框架建构,通过羊茸村等西南地区多案例研究,分析民宿产业集群多维度赋能乡村振兴的实践路径。研究认为:民宿产业集群作为强有力的城乡融合产业载体,通过规模化、集群化和品牌化等效益使城乡多重要素集聚乡村空间,外引内培优化配置城乡资源要素,联动城乡形成内外发展动力赋能乡村全面振兴。从实践路径维度看,民宿产业集群赋能乡村产业经济结构调整,促进乡村产业结构丰富化和经济来源多样化;更新优化乡村组织关系,推动乡村组织治理整体优化和社区和谐关系重塑;系统提升乡村功能空间,实现乡村文化价值双创赋能和三生空间系统提升。文章有助于深入认识和把握城乡融合背景下民宿产业集群发展与乡村振兴的内在作用关系,为我国乡村地区尤其是西部地区的民宿高质量发展、乡村全面振兴和城乡融合互促提供指导。

关键词：城乡融合民宿产业集群乡村振兴城乡关系集群效应

Perspective:Societally connected multimedia across cultures

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Journal of Zhejiang University-Science C(Computers and Electronics) 2012年第12期13卷 875-880页

作者： Zhongfei ZHANG Zhengyou ZHANG Ramesh JAIN Yueting ZHUANG Noshir CONTRACTOR Alexander G. HAUPTMANN Alejandro (Alex) JAIMES wanqing li Alexander C. LOUI Tao MEI Nicu SEBE Yonghong TIAN Vincent S. TSENG Qing WANG Changsheng XU Huimin YU Shiwen YU Department of lnformation Science & Electronic Engineering Zhejiang University Hangzhou 310027 China Microsoft Research Redmond WA USA Department of Computer Science University of California IrvineCA USA College of Computer Science and Technology Zhejiang UniversityHangzhou 310027 China School of Communication Northwestern University Evanston 1LUSA Informedia Group CMU Pittsburgh PA Yahoo.t Research Spain School of Computer Science and Software Engineering Universityof Wollongong NSW Australia Kodak Research Labs USA Microsoft Research Asia China Department of Information Engineering and Computer Science University of Trento Italy Institute of Computational linguistics Peking University Beijing100871 China Institute of Computer Science and Information National ChengKung University Taiwan 701 Tainan School of Computer Science Northwestern Polytechnical UniversityXi'an 710129 China Institute of Automation Chinese Academy of Sciences Beijing100080 China

The advance of the Internet in the past decade has radically changed the way people communicate and col- laborate with each other. Physical distance is no more a barrier in online social networks, but cultural differences （at the individual, community, as well as societal levels） still govern human-human interactions and must be con- sidered and leveraged in the online world. The rapid deployment of high-speed lnternet allows humans to interact using a rich set of multimedia data such as texts, pictures, and videos. This position paper proposes to define a new research area called ＇connected multimedia＇, which is the study of a collection of research issues of the super-area social media that receive little attention in the literature. By connected multimedia, we mean the study of the social and technical interactions among users, multimedia data, and devices across cultures and explicitly exploiting the cultural differences. We justify why it is necessary to bring attention to this new research area and what benefits of this new research area may bring to the broader scientific research community and the humanity.

关键词： Connected multimedia Social media Social-cultural constraint

1000 kV交流输电线路耐张塔带电作业电位转移电弧电磁辐射特性

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高电压技术 2022年第11期48卷 4628-4637页

作者：黎鹏熊胜鹏李婉卿吴田普子恒彭勇三峡大学电气与新能源学院宜昌443002 湖北省输电线路工程技术研究中心(三峡大学) 宜昌443002 国网湖北省电力公司荆州供电公司荆州434000 中国电力科学研究院有限公司电网环境保护国家重点实验室武汉430074

超特高压输电线路等电位带电作业电位转移过程会出现明显间歇性电弧放电(电位转移电弧)现象,电弧产生的电磁辐射可能会影响周围智能设备的正常稳定工作,因此,研究电位转移电弧的电磁辐射特性具有重要意义。基于1000 k V交流输电线路耐... 详细信息

超特高压输电线路等电位带电作业电位转移过程会出现明显间歇性电弧放电(电位转移电弧)现象,电弧产生的电磁辐射可能会影响周围智能设备的正常稳定工作,因此,研究电位转移电弧的电磁辐射特性具有重要意义。基于1000 k V交流输电线路耐张塔带电作业电位转移电流实测波形,利用希尔伯特变换对其进行频谱分析,获得了电位转移电流的频带分布,根据天线理论建立了带电作业电位转移电弧电磁辐射特性仿真模型,对转移电弧的辐射电磁场进行了计算,获得了转移电弧的辐射电磁场分布规律。结果表明:电位转移电弧电流呈高频振荡,其峰值可达1000 A左右,主要频率分布为13~20 MHz;转移电弧产生的辐射电场强度峰值远大于磁场强度,两者均随距离的增大快速衰减,且在金属导体附近分布较为集中;当频率为16.5MHz时,杆塔附近的电场和磁场强度最大值分别为1.5 k V/m和1.9 A/m左右。

关键词：输电线路带电作业电位转移电流频谱特性电磁辐射特性