不同变压器池火面积对换流站阀厅火灾的模拟研究OA

The high-voltage converter valve transformer is adjacent to the valve hall.In the event of a fire,the flame spread will severely endanger the normal operation of the converter valve-the core power conversion equip-ment within the valve hall.For exploring the influence mechanism of fire development of converter transformer on valve hall,the valve hall model of high voltage converter station is constructed based on FDS software.The smoke spread,visibility and temperature distribution in valve tower are analyzed when the fire area of transformer pool fire is 2 m2,5 m2,10 m2,and the influence of pool fire on valve tower is explored.Furthermore,the flashover analysis of the valve hall after the pool fire is carried out.The results show that in case of pool fire in the transformer,the visi-bility is reduced to less than 5 m after 900 s of the fire under three working conditions,which greatly affects the di-saster relief personnel's assessment of the disaster.After the 2 m2 pool fire occurs,the flame development causes less thermal damage to the valve tower.Under the two working conditions of 5 m2,10 m2,the thermal damage of the valve tower is larger after the pool fire occurs.In the event of a 10 m2 pool fire,the flashover needs to meet the upper smoke temperature of 528℃,and the likelihood of the flashover under simulated conditions is small.