浅谈智能变电站设计与建设

随着经济社会的高速发展,社会生产以及人们生活对电力需求日益增长,国家电网公司提出了建设坚强智能电网,其承载着降低能耗、科学发展和有效利用能源、推动新兴产业技术进步的使命。智能变电站是统一坚强智能电网的重要组成部分,文章以某智能变电站建设为例,探讨智能化变电站与常规变电站的区别,具体分析智能变电站智能一次设备、自动化系统及智能化状态监测功能的设计与实现方式,提出该站投运后出现的问题并介绍其解决办法,为后续智能变电站建设提供成功范例。     

智能变电站通信及信息系统配置方案分析

智能变电站是智能电网的重要组成部分。随着当前社会经济的不断发展以及各种先进技术在电网中的广泛应用,智能化已经成为电网发展的必然趋势。本文通过对陕西省电力公司投产的110千伏市政府变智能化变电站通信以及信息系统配置方案的分析与总结,为今后智能变电站的建设提供相关的建议和参考。     

110KV智能变电站的继电保护分析

智能变电站是变电站领域发展的新趋势,对建设智能电网,实行电网改革具有重要意义。大量工程经验表明,继电保护是智能变电站建设的重点所在。因此研究适应智能变电站技术的继电保护装置十分迫切。本文结合对智能变电站继电保护的分析,在110KV智能变电站建设中,给出了继电保护的配置原理、过程层继电保护以及变电站层继电保护等,进而对其设计方案进行了一些探讨。     

浅析220kV智能变电站的运行管理

智能变电站是智能电网中的重要组成部分,其发展建设水平的高低直接影响着我国智能电网的真实建设水平与质量.此背景下,本文首先介绍了智能变电站的基本结构特征,然后对220kV智能变电站运行管理、设备管理以及操作管理等要点进行了分析,并且结合工程实例,对220kV智能变电站运行管理进行了详细阐述,以供参考.     

智能变电站继电保护设备的运维

随着科技在电网建设中的不断发展,高度智能化已经成为了今后电网发展的主流。智能变电站作为智能电网中最为重要的节点当前已经随着电网得到了相当广泛的应用。相比传统的综自变电站,智能变电站的构成模式也在变电站的建设及运维很大程度上节约了可观的成本,同时也产生了较大的运维方式的变化,据此对运维人员技能也提出了相应的要求。本文对××电网220kV某智能变电站的继电保护设备运维方式以及其运维效率的提高与运维方法的改进进行简要的分析。     

智能变电站通信网络及其监测技术的应用研究

智能电网建设始终是我国重要的基础设施工程,这其中最为重要的一项内容便是智能变电站,其与实现电网智能化有着密不可分的联系。而通信系统是智能变电站中的重要组成之一,对通信系统中的通信网络技术以及监测技术进行研究,可以对今后的智能电网建设与智能变电站发展起到极大的推动作用。对此笔者根据多年的经验,对其通信网络技术与监测技术两方面的应用进行深入的研究,期望能对相关的工作人员与同行有所参考价值与借鉴作用。     

智能变电站通讯技术及其发展方向研究

目前我国电网建设中以智能电网建设为主要形式,而智能电网建设中智能变电站建设为关键环节。智能变电站建设主要是在于实现数字化、智能化以及网络化信息控制和管理,本文将针对智能变电站通讯技术展开详细分析。目前我国智能变电站通讯技术应用范围逐渐扩大,但从智能电网建设需求来看,仍存在一定的不稳定因素。本文将结合其技术应用现状和特点,对其发展方向和应用模式展开详细分析,目的在于通过理论研究促进智能变电站通讯技术趋向完善。     

智能变电站关键技术及其构建方式

智能电网是我国电力行业发展的主流方向,而智能变电站的建设则是搭建智能电网的重要一环.本文主要介绍了智能变电站的一些主要特点,结合智能变电站的关键技术简要分析其构建方式,并对我国智能变电站的未来前景进行了展望.     

智能调度技术支持系统在宜昌电网的发展思考

智能电网是未来电网的发展方式,智能变电站和智能调度技术支持系统则是智能电网的重要组成部分。文章通过对对智能变电站的特点和调度技术支持系统一体化平台进行了研究,讨论了智能变电站与调度技术支持系统之间的信息交互问题。对信息交互中可能出现的时钟同步问题、信息冗余问题以及网络安全问题进行了分析,并给出了相应的解决方案,最后结合宜昌电网的实际情况提出了智能调度支持系统在宜昌电网中的应用展望。     

智能变电站二次设备状态检修方法研究

随着科技的进步和发展,智能电网也在如火如荼的建设中,智能变电站是智能电网的重要组成部分,其设备的检修工作对于确保智能变电站的安全和稳定运行意义重大.智能变电站的建设和发展,产生了与之相应的二次设备状态检修方法,状态检修方法能够克服传统的定期检修方式存在的不足,能够有效的提高智能变电站的运行和维护水平.基于此,本文结合笔者多年工作经验,首先分析了智能变电站二次设备的特征,接着论述了变电站传统检修模式的缺陷和变电站二次设备状态检修的必要性,最后分析了智能变电站二次设备状态检修的两个重要问题.     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first