STUDY ON COMBUSTION CHARACTERISTICS OF INSULATION PAPER AND OIL-IMPREGNATED INSULATION PAPER
With the development of social economy, the usage of power grows rapidly. Especially, the coverage of power grid expands incrementally, and transformer plays more and more significant role in electric systems. Therefore, it is very important and valuable to study transformer related fire and its prevention. Based on field investigation and risk analysis, insulation paper and insulation oil were considered as primary fire hazards of transformer. Experimental studies were carried out on the combustion characteristics of oil-impregnated insulation paper and pure insulation paper by means of Cone Calorimeter. The dimension of insulation paper is 10cm×10cm with 3mm thick, and its density is about 0.9*103kg/m3. Heat release rate (as shown in Fig. 1), O2, CO and CO2 concentration (as shown in Fig.2-4) were obtained under radiation intensity of 25kw/m2 and 50kw/m2, respectively. Experiment under each condition was repeated 3 times. Average ignition time under above four conditions was 22s, 7s, 108s and 46s respectively. The results show that with higher radiation intensity, ignition time became shorter; heat release rate and consumed oxygen became larger; and concentration of CO and CO2 rose earlier and higher. Meanwhile, two peaks of heat release rate were appeared during the burning process, and the higher the first wave crest value, the sooner the second wave crest came. Oil-impregnated insulation paper can be ignited easier than those without insulating oil.
Transformer Insulation paper Transformer oil Combustion characteristics Transformer fire
Xiaonan Zhang Hongli Xu Changfa Tao Yang Zhou Xishi Wang
State Key Laboratory of Fire Science, University of Science and Technology of China Hefei, China
国际会议
大连
英文
84-85
2012-05-28（万方平台首次上网日期，不代表论文的发表时间）