浅析集束导线的应用

平行集束架空绝缘导线(以下简称集束导线)是额定电压1kV及以下架空绝缘电缆的一种，是用绝缘材料连接筋把各条绝缘导线连接在一起构成的。它是原国家电力公司在农村电网建设“十五”科技规划中推广应用的产品。集束导线的推广应用，加快了低压电网实行三相四线制供电新模式的实施，为低压电网建设与改造开创了新的途径。     

平行集束导线在低碳配网中的应用——以浙江奉化供电局为样本

平行集束导线,作为一种新型导线主要用于低压配网架空线路,相比传统裸导线具有提高供电质量、降低线损、施工方便、占通道小、防盗和节能等诸多优点。目前,国内这一新型导线的推广和应用并不普及,原因在于对平行集束导线的功     

采用10kV架空集束导线的可行性研究

摘要：叙述了10kV集束型架空阻水电缆的特点及架设方式，通过理论上的计算与分析，得出目前市南供电公司所属范围内使用的常规杆塔对YJLY-120架空集束导线的拉力是可以承受的，但对架空集束导线的架设方式、装置形式、接续方式等技术问题还要作进一步的探讨与研究。     

我国高压架空线路导线舞动情况及分析

本文好我国高压架空线路导线舞动情况并作了分析，简介了导线的舞动原理，提出了各种防舞动措施。     

结构共振引起输电线路导线严重断股的分析

根据架空导线和地线振动情况的实际测量，阐述了架空导线和地线振动断股的特点，分析了振动断股的原因及其预防措施。     

架空平行集束导线的运用及推广

国家电力公司为进一步加强科技进步工作，提高农网的科技含量，以保证农网安全、经济、可靠的运行，在农村低压配电网建设与改造方面，大力采用新技术、新设备。扩大试点的架空平行集束导线供电模式，就是这项工作的重要内容之一。本文就架空平行集束导线与裸导线的经济技术比较及显著的防窃电性能进行阐述，指出在农网改造中应广泛采用该项新技术。     

架空配电线路导线安全系数的选择

架与电线路导线安全系数的选择与架空送电线路导线安全系数的选择有所区别。随导线截面的增大逐步提高导经的安全系数,或者说降低导线的设计最大应力是架空配电线路本身和特点所形成的特殊规律。对不同的架空配电线路,不同的导线规格应选用不同的安全系数。     

碳纤维复合导线在上海电网应用前景初探

认为碳纤维复合导线是一种全新概念的架空输电线路用导钱,与现有的各种架空导线相比,具有重量轻、强度大、耐高温、耐腐蚀、线损低、弛度低等优点.通过对碳纤维复合导线的机械性能、电气性能研究,与其他耐热导线的比较分析并结合上海电网实际情况进行了应用方案探讨,结论可供输电线路工程应用参考.     

架空电缆在10 kV线路应用中的探讨

通过对10kV架空绝缘导线(以下简称架空电缆)性能分析，指出架空电缆在线路运行中的可靠性、经济性以及架设施工、维修便利等方面都优于裸导线。为了进一步科学应用架空电缆，针对一些容易发生的问题，提出了相应的防止措施，重点介绍了国内外架空电缆的防雷技术和咸宁地区的防雷特点。     

架空输电线路的导线伸长特性及其应用

架空输电线路使用的导线多为不同金属的复合绞线,它的伸长特性与单一金属绞线不同。导线伸长对弛度—张力特性非常重要。本文简单叙述各种伸长,同时把导线伸长应用在装配式架线、预应力钢芯铝绞线(PSACSR)的弛度-张力特性上、并进一步对覆冰雪时导线承受过大荷载时的弛度-张力计算作了介绍。     

基于数据包络分析的配电线路利用有效性研究

探讨了数据包络分析(Data Envelopment Analysis, DEA)在配电线路利用有效性研究中的应用,通过对46条架空配电线路的实例研究给出了一种基于DEA的配电线路利用有效性量化评价方法。该方法从投入产出的角度构建输入、输出指标,用DEA对配电线路利用效率进行测算和评价,得出了配电线路的利用效率、非有效配电线路与其最优状况之间的差距、规模有效性总体分布情况和投入要素的冗余统计。决策者据此可采取针对性措施改善线路状况,同时也为制定配电投资和电价相关政策提供了参考依据。     

发电厂直配线路防雷保护措施的研究

对发电厂直配线路的防雷保护现状进行了分析和探讨，对发电机的耐雷水平进行了讨论，对目前一些直配线路的防雷保护缺陷进行了分析，提出了用避雷器、电抗器和电缆联合配置的发电厂直配线路的综合防雷保护措施，并且对直配线路所用避雷器选型、安装和运行维护以及防雷装置的接地问题都提出了一些改进建议．     

复合绝缘横担在10 kV配电架空线路防雷中的应用探讨

在10 kV配电架空线路故障中,雷击是造成配电架空线路故障的主要因素,配电架空线路跳闸以遭受感应雷击为主.在10 kV配电架空线路中应用了复合绝缘横担进行防雷,其各项性能测试均满足线路防雷和安全运行的要求.复合绝缘横担结构简单、免维护,能够有效解决配网架空线路雷击跳闸问题,是一种具有较好应用前景的10 kV线路防雷装置...     

低压配电线路无功优化的应用模式与效果

低压公用配电线路的线损往往大于高、中压配电线路的线损,其原因是无功补偿在低压配电线路上未能得到很好的应用。为达到大幅度降低整个配电系统有功损耗的目的,介绍了低压配电线路无功优化的经典模式——“三分二法则”,论述了应用此法则实现最优配置的步骤和最优控制的方案。最后,列举了算例,对各种降损措施的效益进行了比较。结论是低压线路无功补偿的效益显著,今后应把无功补偿的重点从高、中压配电系统和变压器侧转到低压配电线路中。     

Statistical analysis of lightning surges on distribution lines based on the observation

Probability distribution of surge discharging current of arresters provided a basis for conventional theory of grounding systems. In order to rationalize the grounding systems, it is necessary to grasp the statistical data of lightning surges on distribution lines caused by direct lightning strokes and indirect lightning strokes. Lightning phenomena on TEPCO's distribution lines had been continuously observed for the rationalization of lightning protection design of distribution lines. The observation had been carried out with still cameras and monitoring sensors of lightning surges. This makes it possible to discover new interesting facts that can be useful for rationalization of lightning protection design of distribution lines. Cumulative frequency distribution of conventional data is close to that of ZnO discharging current in the case of direct strokes and indirect strokes through TEPCO's observation. Moreover, to verify the cumulative current distribution in concrete poles, the authors have compared the cumulative distribution of current through ground lines with that of current through ground lines and concrete poles. The results show that the distribution of current through ground lines and concrete poles is larger than that of current through only ground lines for high currents exceeding 1 kA. This fact suggests that lightning surge current flows not only in ground lines but also in concrete poles. © 2008 Wiley Periodicals, Inc. Electr Eng Jpn, 165(2): 36–44, 2008; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/eej.20468     

架空配电线路行波依频传输特性分析

配电线路行波传输特性分析是行波在配电网故障检测与保护中应用的理论基础.针对配电网中的高频行波信号,文中分析了在考虑集肤效应后的架空配电线路分布参数,讨论了不受频率影响的相模变换方法.利用数值计算的方法,得到了参数传输依频曲线,总结了依频传输规律.针对配电线路分支众多、距离较短的特点,对配电线路中行波衰减特性进行了分析.利用ATP-EMTP仿真验证了理论分析结果的正确性.     

Effect of Tower Displacement of Parallel Transmission Lines on the Magnetic Field Distribution

The effect of tower displacement of two parallel transmission lines on the magnetic field distribution is extensively studied. Two parallel lines with the same working voltage and having the same span, where artificial tower displacement is made, are modeled and the analysis of the magnetic field distribution is conducted. Natural tower displacements resulting from two parallel transmission lines with different span lengths and different voltages are also simulated to investigate the effect of displacement distance on the field distribution under and around these lines. Typical parallel lines of 275- and 132-kV, running in Kuwait, are modeled for both types of displacement and lateral magnetic field profiles are developed and analyzed. In addition to the effect of tower displacement value on the magnetic field distribution, the effects of one line disconnection, spacing between the parallel lines, phase conductors arrangements and the transmission line loading are examined. The magnetic vector potential concept, as extended to multiconductor transmission lines is used to model and calculate the magnetic field distribution under and around the parallel lines for the different mentioned operating conditions. The presented graphs are useful for setting the maximum allowable line current magnitude, for existing lines, corresponding to a certain safe level of the magnetic field at the edge of right of way.     

配电线路接地故障定位传递函数法的理论分析

对当前配电网难以解决的接地故障定位问题提出新的解决办法———传递函数法。阐述了应用于配电线路故障定位的传递函数理论 ,给出了传递函数的定义 ,并详细推导了三相配电线路接地故障定位的传递函数表达式 ,通过对理论公式的数值计算 ,证实了配电网接地故障定位的传递函数法是切实可行的。     

配电网故障测距综述

配电网故障测距一直是电力系统中的难点,为找到切实可行的解决方案,针对配电网不同于高压输电线路的特点,诸如混合线路、线路分支多、线路短等,对现有的各种测距方法进行了归纳总结。结合配电网故障测距的新动向,对混合线路配电网的未来测距方向进行了初步探讨,但该解决方向的可行性和实用性还需要更多的理论和实践支持。     

Study on Lightning Protection Measures for Distribution Lines and Customer Equipment against Back Flow Lightning Current from Radio Communication Station

Recently, with the expansion of communication network areas, the number of radio communication stations built in the neighborhood of customer houses has increased. If lightning strikes a communication radio tower, part of the lightning current flows into the distribution line and into customer houses. This may cause the failure of distribution lines or customer equipment. To protect distribution lines and customer equipment from lightning faults, it is necessary to analyze the surge phenomena in distribution lines and customer equipment and take appropriate protection measures. In this study, we examined the effect of lightning protection measures for distribution lines and customer equipment against lightning strikes to a communication tower. First, using an actual‐scale test distribution line, we measured the lightning current flowing into distribution lines and customer equipment. Second, we quantitatively examined the effect of lightning protection measures by lighting surge analysis while changing each parameter. From the experimental and analytical results, we show that the proposed protection measures can reduce the lightning current flowing into distribution lines and customer equipment.