Fundamental study on ultimate utilization of the substance co-existing in nature to insulation of electrical apparatus

自然界共存物质最终利用于电器绝缘的基础研究

• 批准号: 16206027
• 负责人: HIDAKA Kunihiko
• 金额: $ 32.28万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16206027/
• 关键词: SF6; alternative gas; V-t characteristics; steep front square voltage; CF3I; streamer; simulation; Shack Hartman; 放電シュミレーション

This study has been made aiming at the proposal of optimum insulation design of power apparatus in which environmentally-friendly substance is effectively used. As the development, of noncontact measurement technique of electric field and electron density is required for evaluating the insulation condition, two measurement, methods are proposed in the report.A laser wavefront sensor based on the Shack-Hartmann method is constructed for measuring electron density of discharge in air. The wavefronts of two lasers passing through the discharge on a same optical path are measured by fast-gated ICCD cameras with micro-lens arrays. With this sensor, electron density distribution of discharge can be measured without causing any field disturbance.A noncontact measurement of electric field in gases has been developed based on the Kerr effect by the authors. With this measurement technique, ac stressed uniform and non-uniform electric fields in atmospheric air are successfully measured. It is al … More so found that ions generated due to electrical discharges may have very large Kerr effect and this fact may provide with a new method for measuring ion densities in gas.SF_6 gas has high global-warming-potential and is one of the gases for the restriction. Therefore, many researches of alternative insulating gases to SF_6 have been actively done in recent years. In this research, CF_3I gas, which is one of promising SF_6 substitutions, is examined. The insulation performance of CF_3I and SF_6 is examined through measuring sparkover voltage of various electrode geometries which have different electric-field utilization factors. The sparkover voltage for CF_3I gas is 1.2 times higher than that for SF_6 gas under a uniform electric-field condition. On the other hand, under an extremely non-uniform field condition, that for CF_3I gas is 0.7 times lower than SF_6 gas. The insulation property of CF_3I gas becomes almost equal to that of SF_6 gas when the electric-field utilization factor is in the range of 0.3 to 0.4. Less

本研究旨在提出电力设备的最佳绝缘设计，有效地使用环保物质。随着电场和电子密度非接触测量技术的发展，对绝缘状态的评估提出了两种测量方法，并基于Shack-Hartmann方法构建了一种激光波前传感器，用于测量空气中放电的电子密度。利用微透镜阵列快选通ICCD相机测量了两束激光在放电过程中的波前。利用该传感器，可以在不产生任何电场干扰的情况下测量放电中的电子密度分布。作者基于克尔效应，提出了一种非接触式气体电场测量方法。利用这种测量技术，成功地测量了大气中的均匀和非均匀交流应力电场。这是Al ...更多信息 发现放电产生的离子可能具有很大的克尔效应，这一事实为测量气体中离子密度提供了一种新的方法。SF_6气体具有很高的全球变暖潜势，是限制气体之一。因此，近年来人们对SF_6的替代绝缘气体进行了积极的研究。本研究以一种很有前途的SF_6替代气体CF_3I为研究对象。通过测量具有不同电场利用系数的不同电极形状的放电电压，考察了CF_3I和SF_6的绝缘性能。在均匀电场条件下，CF_3I气体的放电电压比SF_6气体的放电电压高1.2倍。而在极不均匀场条件下，CF_3I气体的电流密度比SF_6气体的电流密度低0.7倍。当电场利用系数在0.3 ~ 0.4范围内时，CF_3I气体的绝缘性能几乎与SF_6气体相当。少

项目成果

急峻方形波高電圧を用いたCF3I-N2, CF3I-Air混合ガス中 V-t 特性の測定

• DOI: 10.1541/ieejfms.125.409
• 发表时间: 2005-05
• 期刊: Ieej Transactions on Fundamentals and Materials
• 作者: 裕之 豊田;成居 松岡;邦彦 日高

光センサによる高電圧計測技術

使用光学传感器的高压测量技术

• 发表时间: 2005
• 期刊: 電気評論 90巻8号
• 作者: K.Hidaka;A.Kumada;日高 邦彦
• 通讯作者: 日高 邦彦

エネルギー・環境キーワード辞典

能源/环境关键词词典

• 发表时间: 2005
• 作者: 小島紀徳;日高邦彦他
• 通讯作者: 日高邦彦他

急峻方形波高電圧を用いた SF6-N2混合 ガス中V-t特性の測定

• DOI: 10.1541/ieejfms.125.153
• 发表时间: 2005
• 期刊: The transactions of the Institute of Electrical Engineers of Japan.A
• 作者: 裕之 豊田;成居 松岡;邦彦 日高

Breakdown characteristics measurement of non-uniform field gap in SF6/N2, CF3I/N2 and CF3I/CO2 gas mixtures by using square pulse voltage

利用方波脉冲电压测量 SF6/N2、CF3I/N2 和 CF3I/CO2 气体混合物中非均匀场隙的击穿特性

• 发表时间: 2006
• 期刊: Proceedings of the XVI International Conference on Gas Discharge and their Applications Vol.2
• 作者: Shinichiro Nakauchi;Daisuke Tosu;Shigeyasu Matsuoka;Akiko Kumada;Kunihiko Hidaka
• 通讯作者: Kunihiko Hidaka