典型变压器绝缘纸板燃烧特性试验研究  

Experimental study on burning character of a typical transformer insulation board

作　　者：范明豪[1,2] 张佳庆[1,2] 杜晓峰[1,2] 武海澄[1,2] 

机构地区：[1]国家电网安徽省电力科学研究院,安徽合肥230601 [2]电力火灾与安全防护安徽省重点实验室,安徽合肥230022

出　　处：《消防科学与技术》2016年第4期443-446,共4页Fire Science and Technology

基　　金：安徽省自然科学基金项目(1408085MKL94)

摘　　要：采用锥形量热仪,研究了典型的变压器用绝缘纸板在25、50、75kW/m^2热辐射功率下的热释放速率和质量损失速率,并与采用克拉玛依DB-25#油浸泡前后的纸板的上述燃烧特性参数进行对比分析。测试时,将样品水平方向放置在低密度陶瓷纤维板上,并由高密度陶瓷纤维板支撑,通过上方的锥型电子加热器对试样施加热辐射。结果表明:油浸前,变压器绝缘纸板所受的外界热辐射强度越大,燃烧的发展期越短、持续期越短,衰退期越长;油浸后,变压器绝缘纸板的燃烧分为绝缘油的汽化燃烧及绝缘纸板的热解后燃烧两部分,造成引燃时间提前。油浸前,变压器绝缘纸板燃烧总时间与外界热辐射强度大小无关;油浸后,燃烧总时间延长,且延长的时间取决于外界热辐射的强度大小。Using Cone Calorimeter, several tests were carried out on a typical transformer insulation board. Heat release rate and mass loss rate of the board under three thermal radiation condi- tions including 25,50,75 kW/m^2 were discussed. Burning char- acters comparison between the board and board soaked with Karamay DB-25# oil were conducted. The samples, supported by high density ceramic fiberboard, were placed horizontally on low density fiberboard and were heated by upper cone heater. The results indicated that for un-soaked transformer insulation boards, the develop stage and qusi-steady stage would be shor- ter, and the decay stage would be longer for a stronger external heat radiation. For soaked transformer insulation boards, the burning could be divided into vaporization combustion of the oil and pyrolysis combustion of the board, which leaded to a shor- ter ignition time. The whole burning time did not vary much with the variation of the external heat radiation for un-soaked boards, while the burning time became longer decided by the external heat radiation for soaked boards.

关 键 词：绝缘纸板 变压器 热释放速率 质量损失速率 燃烧特性 

分 类 号：X924.4[环境科学与工程—安全科学] TM411[电气工程—电器]