220 kV地下主变压器室爆炸泄压研究  

Study on explosive pressure relief in 220 kV underground main transformer chamber

作　　者：谢丰蔚 吴培红 陈凯 吕东 Xie Fengwei;Wu Peihong;Chen Kai;Lv Dong(State Grid Economic and Technological Research Insti-tute Co.,Ltd.,Beijing 100055,China;Tianjin Fire Science and Technology Research Institute of MEM,Tianjin 300381,China;Key Laboratory of Fire Protection Technology for In-dustry and Public Building,Ministry of Emergency Manage-ment,Tianjin 300381,China;Tianjin Key Laboratory of Fire Safety Technology,Tianjin 300381,China)

机构地区：[1]国网北京市电力公司经济技术研究院,北京100055 [2]应急管理部天津消防研究所,天津300381 [3]工业与公共建筑火灾防控技术应急管理部重点实验室,天津300381 [4]天津市消防安全技术重点实验室,天津300381

出　　处：《消防科学与技术》2023年第11期1472-1476,共5页Fire Science and Technology

基　　金：国家电网有限公司科技项目(52023420000S)。

摘　　要：由于地下变电站空间密闭性较高、爆炸破坏结果严重,科学设置泄压成为保障其结构安全的重要因素。通过缩尺试验,对不同可燃气体量以及泄压面积下封闭空间中气体爆炸规律进行研究,采用计算流体力学软件FLACS对典型220 kV全地下变电站进行全尺寸建模,设置不同爆炸气体量和泄压面积,对主变压器室中可燃气体爆炸超压进行模拟计算。结果表明:随着可燃气体量的增加,在某一临界量爆炸超压会由缓慢增长转化为急剧增长;随着泄压面积的增大,爆炸超压增长的突变点对应的泄漏气体临界量与爆炸超压之间呈非线性关系。提出了220 kV地下主变压器室爆炸泄压超压与泄压面积的计算式,该计算式的计算误差约为11.27%。High confinement of the underground substation could reduce severe explosion,scientific setting of pressure relief has become one of an important factor to ensure the safety of underground substations.The basic law of gas explosion in confined room under different combustible gas volumes and pressure relief areas were studied by small‑scaled experiments.A computational fluid dynamics software FLACS was used to model the typical 220 kV underground substation and calculate the explosion overpressure of the combustible gas in the main transformer chamber by setting different gas masses and relief areas.The results show that the explosion overpressure will change from slow growth to sharp growth at a critical mass point with the increase of combustible gas mass.A nonlinear relationship between the critical mass of the leakage gas and the explosion overpressure can be discovered with the increase of the pressure relief area.A correlation of explosion overpressure and pressure relief area of 220 kV underground main transformer chamber is proposed.with the error about 11.27%.

关 键 词：全地下变电站 变压器室 爆炸超压 泄压面积 计算式 FLACS 可燃气体 

分 类 号：X913.4[环境科学与工程—安全科学] O643.2[理学—物理化学]