耐燃烧和耐起痕试验方法标准的研究（下）

(续上期)3耐起痕试验最新的耐起痕试验IEC标准是IEC60112:2003《固体绝缘材料在潮湿条件下相比起痕指数和耐漏电指数的测定方法》,现行有效的国标是GB/T4207-2003《固体绝缘材料在潮湿条件下相比电痕化指数和耐电痕化指数的测定方法》(等同IEC60112:1979)。GB7000.1-2007引用的     

聚合物纳米复合材料耐电晕机理的研究进展

叙述了耐电晕聚合物纳米复合材料的研究进展,分析了绝缘材料的耐电晕机理,为开发新型耐电晕聚合物纳米复合材料奠定了基础.虽然国内学者对其合成、结构、性能及耐电晕机理等问题进行了研究,并取得了一定的进展,但尚未获得关键性突破.即生产耐电晕绝缘材料的关键技术有待提高.     

日本电源插头的耐电痕化性能试验方法解读与应对

本文介绍了日本电源插头的耐电痕化性能试验方法——JWDS0028,并通过与IEC60112《固体绝缘材料的耐电痕化指数和相对电痕化指数的测定方法》的比较分析,帮助读者更好地理解和应用该方法,也为日本插头生产企业提供一些应对建议。     

GB/T 4207—2012与GB/T 4207—2003标准差异分析

耐电痕化是评价电工电子产品中固体绝缘材料性能优劣的重要参数。通过对比GB/T 4207—2012与GB/T 4207—2003标准差异,分析了耐电痕试验及其影响因素,为正确进行固体绝缘材料的耐电痕化试验提供参考,有助于检测部门改进试验方法。     

聚酰亚胺薄膜绝缘材料耐电晕机理研究

为了探讨聚酰亚胺薄膜绝缘材料耐电晕机理,对自制纳米杂化聚酰亚胺(PI)薄膜进行不同时间的电晕预处理,并对电晕预处理后的试样分别进行电晕老化与热激电流(TSDC)测试,结果发现在适当的电晕预处理条件下,纳米杂化PI薄膜的耐电晕寿命会得到提高,且薄膜耐电晕寿命、热激电流活化能都与薄膜电晕预处理时间存在一定关系,二者变化趋势大致相同。分析表明纳米杂化PI薄膜的耐电晕寿命与其中受陷载流子的状态有关,当材料中均匀分布能级较深的稳定的载流子陷阱时,材料表现出较好的耐电晕性能。     

几种绝缘结构和绝缘材料的高频耐电晕性能分析

研究了几种绝缘材料和绝缘结构的电性能,利用高频脉冲绝缘测试仪器分析比较了其耐电晕性能。结果表明:杜邦耐电晕聚酰亚胺薄膜的耐电晕性能优于国产聚酰亚胺薄膜,耐电晕聚酰亚胺薄膜绝缘结构具有较好的耐电晕性能。     

变频电机用耐电晕绝缘材料的应用研究进展

分析了变频电机绝缘材料的工作环境和破坏机理,概述了耐电晕绝缘材料的研究及其在变频电机中的应用现状,讨论了我国在该领域存在的问题,提出了今后耐电晕绝缘材料的研究重点。     

辐照交联热收缩耐电痕化材料的研究

对聚合物材料的电痕化过程、聚合物材料的结构与电痕化的关系以及聚合物电痕化反应机理进行了阐述。通过合理地选择耐电痕化的聚合物树脂和填料，进行配方、成型、辐照、扩张等工序，成功地研制出了辐照交联热收缩耐电痕化材料。     

耐电晕聚酰亚胺薄膜研究进展

聚酰亚胺因其耐电晕性能不足严重缩短了复杂工况下的使用寿命，纳米改性技术的应用为耐电晕聚酰亚胺薄膜的研发提供了新的发展方向。该文首先从耐电晕机理出发，综述了电晕下聚酰亚胺的老化进程；然后从材料的介电特性、电导特性、陷阱特性、界面效应及热导率等性能参数分析了提升复合聚酰亚胺耐电晕性能的策略；最后针对当前耐电晕聚酰亚胺薄膜研究存在的问题进行了总结，并对未来发展方向做出了展望，以期实现具有优异耐电晕性能聚酰亚胺薄膜的研发。     

GB/T4207-2003与IEC60112:2003的比较

1、前言我国目前现行的固体绝缘材料在潮湿条件下相比电痕化指数(以下简称CTI)和耐电痕化指数(以下简称PTI)测定方法的标准为GB/T4207-2003《固体绝缘材料在潮湿条件下相比电痕化指数和耐电痕化指数的测定方法》,它等同于IEC60112:1979。而     

Properties of electrical insulating materials at cryogenictemperatures: A literature review

Many insulating materials and systems for superconducting electrical equipment have been developed in response to the severe demands of safe usage, such as in cryogenic temperature, high mechanical stresses, high radiation, etc. They have been designed to fulfill very extreme service conditions, either at liquid helium or liquid nitrogen temperatures. Whatever the future industrial development, there is already abundant knowledge about insulating materials at cryogenic temperatures, and the feasibility has been proven. Many laboratories in the world continue research to increase this knowledge and to fill in the remaining gaps     

耐高温聚合物电介质材料的研究与应用进展

耐高温聚合物电介质材料以其优良的耐高温稳定性、优异的介电性能以及良好的耐环境稳定性等在电工绝缘领域中具有广阔的应用前景。系统综述了国内外近年来在耐高温聚合物电介质材料基础与应用领域的最新研究进展。从耐高温聚合物电介质材料的发展历史、结构特性以及应用研究等方面进行了综述。重点介绍了耐高温聚合物电介质材料在轨道交通牵引电机、新能源电力设备以及航空航天电气设备等电工绝缘领域中的应用状况。最后对耐高温聚合物电介质材料的未来发展前景进行了展望。     

Progress in Japan in electrical insulation at high temperatures

It is expected that the use of electrical equipment at high temperatures will increase in the future, and the demand for heat-resistant insulation that can be used at temperatures above 300°C will increase. In addition, this high temperature electrical equipment will need to be higher in voltage and have a larger capacity. Accordingly, research and development will be needed to study the high temperature behavior of insulating materials, the insulation manufacturing process, and functional evaluation methods of insulation systems. Progress in Japan in R&D of insulation systems at higher temperatures is discussed     

高分子材料在电器附件产品中的应用与发展现状

本文综述各种用电保护高分子材料在电器附件产品中的应用,及其在科研工作中的研究重点与突破方向,并详细论述了现阶段用保护高分子材料在电器附件行业中的发展现状。     

防霉、防青苔型防污闪涂料原理和可能的应用

分析了温湿环境中电力系统现存的问题,认为绝缘设备表面滋长的青苔、霉菌等是影响此环境中电力设备安全稳定运行的重要原因,而在电力设备表面喷涂防霉防青苔型绝缘防污闪涂料是解决此问题的关键。同时分析了霉菌、青苔的生长机理以及防霉、防青苔涂料的原理,并综述了现阶段常用的防霉、防青苔的方法以及防霉、防青苔绝缘材料的研究现状以及在现场的施工工艺。最后展望了防霉、防青苔型防污闪涂料在电力系统的应用前景。     

耐电晕材料合成及耐电晕机理研究进展

采用耐电晕材料作为变频电机的漆包线绝缘是延长变频电机使用寿命的重要途径之一。在综合国内外公开发表的相关文献的基础上,对耐电晕材料的合成、耐电晕机理进行了评述,并指出目前我国在耐电晕材料的研究和产业化过程中存在的问题及今后的发展方向。     

交流变频电机的绝缘

本文介绍了变频电机绝缘破坏的机理、绝缘材料的性能及绝缘工艺的要求。将国产材料与进口材料进行对比,找出差距。对国产绝缘材料的开发及绝缘评定提出了建议。试验及实际应用表明,采用国产材料加上正确的绝缘工艺可以生产出满足使用要求的变频电机。     

Water in oil-filled high-voltage equipment part II: water content as physicochemical tools for insulation condition diagnostic

In the first part of this investigations, we examined the current state of knowledge of the effect of water on paper and liquid-insulating materials. Demonstrated that the scientific representation of the states of water in insulating liquids has a direct practical application as a diagnostic tool for electrical equipment, at least for the dielectric properties of the insulation. The work presented in this second part of these investigations is divided into four sections. The first section deals with the influence of water on the electrical characteristics of the oil/paper insulating materials, followed by a critical review of up-to-date water quantification methods. Based on the physicochemical criteria of the limiting state discussed in the third section, this article proposes some analytical expressions that can help electrical engineers monitor and/or diagnose oil-filled, high-voltage equipment. Our investigations show the advantage of diverse methods for measuring humidity in insulating liquids, and a variety of analytical expressions for calculating the condition of liquid/ solid insulation systems.     

蒙脱土/聚酰亚胺复合薄膜的电击穿破坏特性

通过在聚酰亚胺基体中引入一定量MMT片层,可以改善薄膜的耐电老化性能,对薄膜电老化前后表面形貌及化学组成的研究结果表明:MMT片层均匀而充分的分散提高了MMT/PI薄膜的耐电弧性,这是聚酰亚胺薄膜电老化性能改善的原因。     

Electrical Insulation Performance of Paper–Ice Composite Insulation System at Cryogenic Temperature

In recent years, research on the development of high-temperature superconducting cables has advanced. The application of a composite insulating system made of insulating paper-liquid nitrogen has been studied as an electrical insulating system for high-temperature superconducting cables. In paper-liquid nitrogen composite insulating systems developed on the basis of conventional techniques, microscopic bubbles easily remain inside the paper, and the partial discharge are supposed to occur easily. In order to overcome this drawback, we formulated a paper-ice composite insulating system as a substitute for the paper-LN₂ of the cryogenic electrical insulating system in high-temperature superconducting cables. In this study, the breakdown strength, partial discharge, V-t characteristics, effect of pressure on breakdown characteristics, and the self-healing breakdown characteristics of a paper-ice composite insulating system were investigated in order to understand the basic properties of new insulating materials for applications to high-temperature superconducting cables. As a result, it was clarified that the AC breakdown strength of paper-ice composite insulating system was higher than that of paper-liquid nitrogen insulating system, and that of paper-ice composite insulating system exhibited a self-healing type. Copyright © 2009 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.