压缩空气泡沫炮系统扑救特高压换流变压器 全液面溢油火灾试验研究

Experimental study on full-level oil spill fire of UHV converter transformer by compressed air foam monitor system

为解决特高压换流变压器火灾较难扑救的技术难题,提出了一种压缩空气泡沫炮系统扑救换流变压器全液面溢油火灾试验方法,采用1∶1全尺寸特高压换流变压器实体火模型,通过设置高温热油、全液面溢油火灾等不利灭火条件,研究了压缩空气泡沫炮系统扑救全液面溢油火灾的有效性。结果表明:在48 L/s泡沫溶液流量下,压缩空气泡沫炮系统灭火时间为210 s,供泡6 min即可将高温变压器油温降至100 oC以下;灭火过程中,左侧事故油池因预燃时间较长、变压器油温度较高,其灭火时间最长,而压缩空气泡沫炮能够快速冷却降低箱壁温度,阻止溢油汽化,有效扑灭溢油火。

In order to solve the technical problem that UHV converter transformer fires are difficult to fight,a method for extinguishing the full liquid level oil spill fire through compressed air foam monitor system is proposed in this paper.1∶1 full-size UHV converter transformer solid fire model is adopted.Unfavorable fire-extinguishing conditions such as high-temperature hot oil and full-liquid-surface oil spill fires are set,and the effectiveness of the compressed air foam monitor system in fighting full-liquid-surface oil spill fires is studied.The test shows that under the flow rate of 48 L/s foam solution,the fire is extinguished in 210 s,and the high temperature transformer oil is reduced to below 100 oC after supplying foam for 6 minutes.During the fire extinguishing,the left accident oil pool takes longer to extinguish the fire,attribute to higher temperature and longer pre-combustion time,whereas the compressed air foam monitor system can quickly cool down the temperature of the tank wall,prevent the oil spill from vaporizing,and effectively extinguish the oil spill fire.