伺服驱动产品精准与智能的突破

文章简要介绍新一代伺服发展的方向,并详细论述新一代伺服产品特点,提出了新一代伺服产品由于其功能特点必然会受到广泛的应用。文章同时介绍天津罗升企业有限公司所推广的智能伺服驱动器Elmo与精密直接驱动马达横河DD马达。     

鸟的习性及鸟害防护的研究

通过对鸟的生态习性的研究,分析了输电线路上鸟害形成的原因,提出了管理防护措施和技术防护措施。同时介绍了目前国内输电线路防护鸟害所使用的主要产品的特点及优缺点,并提出新型鸟害防护产品的发展方向。     

家电涂装前处理的无磷产品的前景及应用

本文介绍了家电行业传统磷化前处理工艺的现状,分析了替代产品——环保型表处理产品的特点和研发状况,并就陶化剂的实际应用进行分析,对陶化剂产品的现场实际应用提供了参考性建议。提出了环保型表处理产品是替代磷化产品的必然趋势以及未来的挑战。     

600MW锅炉空气预热器热点检测系统的调试

本文简述我国第一台600MW超临界火电机组中空气预热器热点检测系统的性能和特点,并重点介绍了该系统冷、热态的调试措施,提出了在调试中值得注意的若干问题。     

GIS产品在中压领域的应用和存在的问题

市场的需求拓展了高压GIS产品在中压领域的使用.文章简单介绍了C-GIS产品的特点和其在选择、安装和维护中应注意的问题,并详细介绍了C-GIS在不同环境条件下的应用,最后提出寻找一种可以替换SF6气体的绝缘介质,是该类产品今后的努力方向之一.     

电缆故障探测的发展

列举了电缆故障探测的传统方法,分析了传统方法的一些不足,然后介绍了电缆故障探测的新方法和他们的特点。最后探讨了电缆故障探测发展的新方向。     

配电网开闭所接地故障的探测

本文分析了配电网开闭所中发生单相接地故障时电压、电流的特点,指出了目前应用于开闭所的接地检测装置存在的问题,提出了解决这一问题的方法。     

辐照交联聚氯乙烯绝缘电线电缆的应用及开发

本文分析了辐照交联聚氯乙烯绝缘线缆的特点,介绍了该产品的应用及开发现状,并就应注意的几个问题提出了作者的看法。     

集合式并联电容器成套装置

简要介绍了我国第一套集合式并联电容器成套装置的研制过程，产品结构、特点和安装情况，提出了产品运行的注意事项。     

谈矿用隔爆型组合开关控制站的开发

本文提出了组合式开关控制站在开发过程中应该重点解决的一些主要问题及解决办法，并且介绍了国外产品的一些特点，同时也简略地分析了我国该项产品落后的原因。     

潜油泵用电缆的应用和发展

本文论述了潜油泵用电缆在油井中使用的环境与条件 ,并对国内外潜油泵电缆的结构、材料及其发展方向进行了综述和建议     

500 kV充油海底电缆运行状态综合在线监测系统研究

海南联网系统500 kV海底电缆运行环境复杂多变,会直接影响到海底电缆的运行状态.为了有效掌握海南联网系统三相31 km海底电缆的运行状态,研究充油海底电缆运行状态综合在线监测技术至关重要.文中根据海底电缆实际运行监测要求,结合充油海底电缆捆绑通信光缆的这一特殊结构,开展了基于布里渊光时域分析的分布式光纤温度传感技术研究,建立了基于IEC 60287热路模型的充油海底电缆的温度热场分布的热路模型,研制了500 kV充油海底电缆运行状态综合在线监测系统,完成了系统的现场安装及挂网运行.该系统能实时监测海底电缆的温度、油流以及油压等运行参数,通过海底电缆温度、油流以及油压历史数据分析,表明系统可实时监测海底电缆的运行状态及稳定可靠运行.     

Long-term reliability testing of 500 kV DC PPLP-insulatedoil-filled cable and accessories

This paper describes the results of a long-term reliability test of a newly developed 500 kV DC oil-filled cable and accessories that transmit up to 2800 MW. This is the largest capacity ever used for submarine cables. The test line was 500 m and consist of submarine cables, land cables and several kinds of accessories. An optical fiber sensor was first installed in the oil duct of the cable to measure the conductor temperature directly under application of DC voltage. From 1994 to 1996, the authors carried out an accelerated electrical and thermal aging test equivalent to 40 years, a load cycle test, a polarity reversal test and a transient overloading current test. Satisfactory breakdown strength was confirmed in the residual test which followed the long-term test. These results have been instrumental to the decision to construct 500 kV DC commercial submarine cable lines     

阻燃、耐火电缆的设计开发及选用

阐述了阻燃、耐火电缆的试验方法,对其组成部分———绝缘、护套材料的合理选用及设计时注意的问题进行了分析。     

潜油泵电力电缆制造及其主要特性

本文主要介绍了目前国内外潜油泵电力电缆主要的型号、规格及其生产工艺和使用的特点 ,并对各种类型的潜油泵电力电缆进行了对比性试验 ,供有关人员的参考。     

The performance of power cables with fully synthetic tapedinsulation

The testing of oriented polyethylene tape with an embossed surface design for use as oil-impregnated insulation for flexible power cables is described. The development was carried out with small samples in the form of sheets, small cylindrical samples about 1 m long, and long cables either 15 m or 100 m long. Tests with these experimental configurations included investigating: (1) breakdown stress and statistics of breakdown; (2) dielectric loss measurements; (3) design of screens; (4) design of splices; (5) mechanical problems of taping and installing cables; and (6) oil impregnation and type of oil. The results point the way to the next development steps. These are: (1) development of thinner embossed tapes to exploit the potential of the high dielectric strength inherent in synthetic taped insulation; (2) development of accessories such as splices and terminations; and (3) complete system design to avoid a dramatic increase in dielectric loss caused by oil contamination. If the integrity of the insulation homogeneity can be maintained, it appears the high voltage breakdown stresses will be adequate to permit economical operation     

光纤、光缆和通信电缆相关标准制定的现状

本文介绍了光纤、光缆和通信电缆国际标准的发展动态;详细描述了近几年来国内相关标准制定的现状。     

融合在线监测数据的海底电缆综合健康状态评估

海底电缆的运行状况直接影响海洋工程的安全可靠运行,及时有效地掌握其健康状态具有重要意义.海缆自身结构和运行环境复杂,健康状态难以准确掌握.为此,提出了一种融合在线监测数据的海底电缆综合健康状态评估方法.首先,以电缆状态评价技术导则为指导,融合海缆在线监测动态数据和巡检、试验等静态数据,构造适用于海缆综合健康状态评估的指标体系.其次,基于海缆在线监测状态量的特征,结合电缆导则评价标准,形成了一套合理、有据的评估准则.然后,在上述基础上建立多状态量融合的评估模型,分层对海缆部件和整体进行评估,得到海缆健康状态,并根据模糊理论量化状态,得到海缆综合健康状态评估结果.最后通过对某海上油气工程的海缆进行实例分析,验证了该方法的可行性和有效性.     

Condition assessment of distribution PILC cables from electrical, chemical, and dielectric measurements

A study was conducted to evaluate some new diagnostic techniques enabling users to effectively manage their paper-insulated, lead-covered (PILC) cable assets. The objective is to present the results obtained with four diagnostic techniques designed for use on in-service cables, but used only to a limited extent on PILC cables. These techniques are LIpATEST leakage current test method, isothermal relaxation current (IRC), return voltage method (RVM), and dielectric spectroscopy. In addition, the AC breakdown strength of the cable was also measured. The differences between the titration measurements and the predictions made by AC breakdown and the non-destructive techniques, such as RVM and dielectric spectroscopy, were noted with specific reference to moisture content in the cables. The different diagnostic techniques used in the study gave a reasonably consistent and coherent evaluation of the insulation condition of several field-aged PILC cables. The moisture content deduced from RVM and dielectric spectroscopy does not agree with Karl-Fischer titration of the same samples. It is suggested that aging induces more detrimental polarization processes in the cable oil, whose impact on electrical properties is still unknown but appears to be much more influential than moisture for the cables tested. The results confirm a previous suggestion that PILC cables kept under load are not significantly affected by water ingress.     

对称数字通信电缆电磁兼容性能及测试

讨论了非屏蔽和屏蔽对称数字通信电缆的电磁兼容问题,指出影响其电磁兼容性能的因素,论述了对称数字电缆电磁兼容性能的测试方法及其实施。