高电压技术2017，Vol.43Issue(3)：743-753,11.DOI:10.13336/j.1003-6520.hve.20170303008
氟碳介质热致气液两相流的工频击穿特性及其在GIL中的应用展望
AC Breakdown Initiated by Thermally Induced Bubble of Nonflammable Fluorocarbon and Its Application Prospect in GIL
摘要
Abstract
Some environmental friendly fluorocarbons could be used as substitute for SF6 in power transformers,GIL or even GIS,where they exist as liquid or two-phase flow condition.However,the insulating properties and discharge mechanism of liquid dielectrics under the heated two-phase flow state are not clearly understood yet.We experimentally studied and measured the AC breakdown voltage (BDV) of thermal bubble induced two-phase flow condition of fluorocarbon by self-heating electrodes with different thermodynamic parameters as heat flux,working pressure,and gap distance.According to the results,the BDV changes with heat density like an elongated "Z" shaped curve.And the BDV converting point is highly consistent with the apex value of surface superheat,the eigenvalues and eigenvectors representing the BDV converting point have been proposed accordingly.Finally,a simulation analysis and calculation of insulating and cooling characteristics of a GIL model has been accomplished,which proves the feasibility of the environmental friendly fluorocarbon dielectrics as SF6 substitute used in the new designed GIL.关键词
氟碳介质/击穿电压/热致气泡流/自发热电极/气液两相流/气锁效应/SF6替代/GILKey words
fluorocarbon/breakdown voltage/thermal bubble/self-heating electrode/two-phase flow state/vapor lock/SF6 substitute/GIL引用本文复制引用
牛文豪,张国强,林涛,李康,Adrian Traian Plesca..氟碳介质热致气液两相流的工频击穿特性及其在GIL中的应用展望[J].高电压技术,2017,43(3):743-753,11.基金项目
国家自然科学基金青年基金(51307157) （51307157）
中国科学院与俄乌白等国科技合作基金(2016VTA036).Projects supported by National Natural Science Foundation of China (51307157),Foundations for Cooperation with Russia and Eastern European countries by Chinese Academy of Sciences(2016VTA036). （2016VTA036）
