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关键词： ELECTRICAL engineering   ELECTROSTATIC accelerators   HIGH voltages   MATHEMATICAL physics  

摘要： There is a trend to revive mature technologies while including high voltage options. ESD protection in those technologies is challenging due to narrow ESD design windows, NMOS degradation problems and the creation of unexpectedly weak parasitic devices. Different case studies are presented for ESD protection based on latch-up immune SCR devices. (c) 2005 Elsevier Ltd. All rights reserved.

关键词： 青藏铁路   变电站   永冻土   分层土壤模型   接地   电阻   接触电压   跨步电压   高电压技术   电力系统  

摘要： 为青藏铁路供电的110kV沱沱河和五道梁变电站地处高寒永冻地区,如何在高寒永冻地区进行接地系统设计对变电站的建设十分重要。通过测试二次电缆和二次设备的绝缘耐受特性,提出可将地电位升高提高到5kV。采用电磁场数值计算方法对分层土壤中接地系统的电气参数进行计算, 分析比较了各种可行的高寒冻土地区接地系统的设计方案, 讨论了深垂直接地极的布置规律、水平地网的埋设深度、接地系统的均压优化布置对接地系统接地电阻、接触电压和跨步电压的影响。最终得出了坨坨河和五道梁两变电站的接地系统设计方案,并总结归纳了高寒冻土地区变电站接地系统的设计规律。

关键词： 验收检验   交流电流   交流电压试验   交流电压   音频系统   电流互感器   电流   定义   测定   直流电流   直流电压   电气工程   电气测试   测量误差   频率   频率响应   高电压   高压电器   高电压技术   高压试验技术   高压试验   脉冲电压   检验   布置   雷涌电压   低频   测量   测量设备   测量仪器   测量系统   计量学   质量保证   规范(验收)   冲击电流   开关脉冲压力   符号   试验报告   试验技术   测试   测试条件   测试电压   电压   磨损量  

标准号: BS EN 60060-3-2006

摘要： This part of IEC 60060 is applicable to the following on-site test voltages and in service stresses, which are in relation to IEC 60060-1:– direct voltage;– alternating voltage;– lightning impulse voltage of aperiodic or oscillating shape;– switching impulse voltage of aperiodic or oscillating *** special tests the following voltages are used:– very low frequency voltage;– damped alternating *** standard is applicable to equipment with a highest voltage Um greater than 1 kV. The selection of on-site test voltages, test procedures and test voltage levels for apparatus, equipment or installations is under the responsibility of the relevant technical *** special applications, on-site test voltages different from those described in this standard may be specified by the relevant technical committee.

关键词： high voltage ICs   process integration   LDMOS 0.35 CMOS   adaptive RESURF  

摘要： This work describes the evolution of a CMOS based lateral high voltage (HV) technology concept, where the HV part is integrated in a low voltage (LV) CMOS technology. The starting, point is an existing Substrate related state of the art 0.35 mu m LV CMOS technology (C35) which is optimized for divital and analog applications. The technology covers two different gate oxide thicknesses which allow to control two LV logic levels with different gate voltages and drain voltages (max.V-GS = max.V-DS 3.3V, max. V-DS = max. V-DS = 5.5 V). The key requirement for the HV integration is to preserve the LV design rules (DR) and the LV transistor parameters. Only in this case it is possible to reuse the digital and analog intellectual property (IP) blocks. The major challenge of this integration is to overcome the relatively high surface concentration of the 0.35 mu m CMOS process which defines the threshold voltages and the short channel effects. Because the HV devices use the same channel formation like the LV devices, a process concept for the drift region connection to the channel is the key point in this integration approach. A benchmark for the process complexity is given by the mask count (low Volume production) and the number of alignments (high Volume production). Starting from a very simple approach n-channel HV transistors are described which can be integrated in the substrate related LV CMOS concept without adding additional masks. During the next steps the LV CMOS process is modified continuously using additional masks and alignment steps. From each step to step the new HV properties are explained and the trade-off between process complexity and device performance is discussed. (c) 2005 Elsevier Ltd. All rights reserved.

关键词： 高电压技术   轴向磁场   旋转电弧间隙开关   运动机制   峰值电流   电荷转移量  

摘要： 开关在脉冲功率技术中极其重要,其已成为制约脉冲功率技术发展的主要技术瓶颈。为了满足高电压、大电流、高电荷转移量、电极烧蚀小、寿命长的要求,文中设计了一个由轴向磁场控制的旋转电弧间隙开关,研究了其电磁场分布及轴向磁场下电弧的运动机制,并进行了初步实验。结果表明此开关中的电弧确实在轴向磁场控制下做旋转运动,且运动速度很快,不需要对触发脉冲进行陡化就能得到纳秒级脉冲。实验放电波形比较稳定,分散性为2ns;开关电极表面的烧蚀小,有利于延长开关的寿命;开关工作参数为:电压23kV,单脉冲能量0.314MJ,峰值电流100kA,电荷转移量27.3C/脉冲。

关键词： 棒形悬式复合绝缘子   中国   电力企业   高电压技术   输电工程   特高压  

摘要： 12月18日，中国电力企业联合会在山东淄博组织召开了国内第一个特高压百万伏级棒形悬式复合绝缘子技术鉴定会。会议认为，该项技术填补了国内特高压技术领域的空白，居于国际领先水平，从而为我国1000千伏特高压输电工程电气设备国产化，引来了一条新路。

关键词： 特高压输电   高电压工程   技术领域   清华大学   高压研究   国家电网公司   全球背景   科学研究   高电压技术   设备国产化  

摘要： 记者:在发展特高压输电这件事上,您曾说许多外国专家都很羡慕中国的学者,原因是什么?关志成:2005年8月底在北京召开的第14届国际高电压工程会议上,我们请国家电网公司副总经理舒印彪作大会特邀报告,介绍我国电力工业发展状况和特高压发展规划,引起了与会专家的浓厚兴趣.