浅谈架空配电线路的运行与维护

本文从架空配电线路入手,阐述了架空配电线路的运行与管理要点,从巡视中发现缺陷,解决架空配电线路运行中常遇到的实际问题。     

供电系统配电线路故障识别与检测

该研究以供电系统配电线路的实际运行工作作为研究基础,对供电系统配电线路常见的高阻故障、短路故障、单相接地故障、间歇性故障的产生原理和识别方法进行了分析,提供了供电系统配电线路运行工作中做好主动定位、被动定位、智能定位、监测定位技术的应用,提升供电系统配电线路检测工作的要点,希望为提升供电系统配电线路故障的识别效率,提升供电系统配电线路故障的检测质量有所帮助。     

探究配电线路的运行维护和管理

随着电网系统的迅速发展,配电线路的结构、运行和规模等都发生的较大的变化,因此,对配电线路的运行进行维护和合理有效的管理是保证电网安全运行的重要保障之一.配电线路的缺点有很多,例如:地域广、距离长、受自然环境与人为因素影响较多,因此维护配电线路的正常运行存在许多困难.通过全面细致的了解和分析配电线路运行的特点,并加以比较,我们可以更好的处理配电线路日常出现的突发状况并及时的进行维修护理工作,以保证用户的用电质量和用户用电的安全可靠性.同时,通过科学的管理配电线路,可以保证电网安全、可靠、优质、经济运行.重点介绍了配电线路的运行维护和管理方面的内容.     

配电线路运行维护管理浅析

配电网是电力系统的重要组成部分,配电线路一旦出现故障将直接影响用户的正常用电。为了防止各种故障的出现,确保电网的正常运行,有必要做好配电线路运行检修工作,及时发现并解决配电线路中存在的各种缺陷。分析了配电线路运行中的几种常见故障,如短路、雷击、过载等,并提出了配电线路运行维护和管理的相关措施。     

探究配电线路的运行维护和管理

随着电网系统的迅速发展,配电线路的结构、运行和规模等都发生的较大的变化,因此,对配电线路的运行进行维护和合理有效的管理是保证电网安全运行的重要保障之一。配电线路的缺点有很多,例如:地域广、距离长、受自然环境与人为因素影响较多,因此维护配电线路的正常运行存在许多困难。通过全面细致的了解和分析配电线路运行的特点,并加以比较,我们可以更好的处理配电线路日常出现的突发状况并及时的进行维修护理工作,以保证用户的用电质量和用户用电的安全可靠性。同时,通过科学的管理配电线路,可以保证电网安全、可靠、优质、经济运行。重点介绍了配电线路的运行维护和管理方面的内容。     

配电线路安全运行管理探讨

随着人们对电力的需求日益增长,提高10kV配电网的安全运行水平应该成为电网工作中的一项重要任务.本文结合自己的工作经验,根据实际对影响配电网安全、可靠、优质、经济运行的网络结构、运行状况、过电压情况等多方面因素进行了详细分析,提出了相应的配电线路安全运行管理措旌.     

配网线路运行安全管理探讨

配电线路运行的安全水平已经成为我国电网建设中的一个极其重要的环节。受到距离地域以及自然环境等因素的影响，在维护与管理配电线路运行的工作中会有许多问题出现。因此，对我国配电线路运行中存在的问题进行了研究，分析了气候与地域、配电线路结构及落后的配电设备等对配电线路运行带来的影响，同时从人员选择、预期计划及宣传等方面阐述了配电运行的维护和管理，最后总结了输电线路的防雷技巧，为我国配电线路运行维护与管理提供了一些可行性的思路。     

对输配电线路运行管理的研究探讨的认识

随着科学技术的进步,智能电网得到了快速发展。而输配电线路作为其组成部分,由于其应用范围广、距离长、效率高,因此,容易受到自然和人为影响,其线路运行管理具有一定难度。做好输配电线路运行管理成为重要研究课题,保证电网运行安全,能够推动社会经济发展。对此,笔者根据实践研究,就输配电线路运行管理与方法进行了简要分析。     

有关10kV配电线路的无功补偿技术探究

对于配电线路运行来说,电压质量已成为衡量电能质量水平的关键因素:①保障用电客户生产生活的实际需求;②也可确保电网安全、经济、可靠地运行.通过应用10kV配电线路,为客户供电提供电力网络保障,因此其质量具有重要意义.结合笔者实际工作经验,对10kV配电线路中的无功补偿技术进行分析.     

农网故障定位与隔离系统应用研究

根据农网配电线路的运作特点,对农网的线路分段以及联络、配电线路的两端分支、客户交接处的自动化开关设备以及故障智能指示器实现故障指示、隔离与供电恢复。此外,利用无线网络设备建立一条通讯通道和后台监控体系,将农网的故障定位以及隔离系统运用实现经济化运行,提高农网的配电线路供电安全性和可靠性,提高农网线路的管理水平。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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