某特高压变压器爆炸事故数值模拟重构

特高压变压器由于体积大、油量多、电压高,具有较高的火灾爆炸危险性.本文针对某特高压变压器爆燃事故进行分析,根据发生事故的部位位于高压套管的事实,利用FLACS建立了全尺寸特高压变压器模型,模拟了高压套管先泄漏后爆炸与套管先爆炸后引发二次爆炸两种工况.研究发现:先泄漏后爆炸条件下,模拟的爆炸压力与依据事故监控估算的爆炸压...

Numerical simulation and reconstruction of explosion accident of an UHV transformer

The UHV(Ultra High Voltage)transformer has a high risk of fire and explosion due to its large volume,large amount of oil and high voltage.In this paper,the explosion accident of an UHV transformer is analyzed.According to the fact that the site of the accident is located in the HV casing,a fullsize UHV transformer model is established by FLACS to simulate the two working conditions of the HV casing leaking first and exploding and the casing exploding first and causing a secondary explosion.Through the study,it is found that under the condition of first leakage and then explosion,there is a big difference between the simulated explosion pressure and the explosion pressure estimated according to the accident monitoring,which can be eliminated from the cause.As for the internal explosion of the transformer bushing causes a secondary explosion,the simulated internal explosion pressure and the flame shape of the secondary explosion are in good agreement with the accident monitoring,indicating that the high probability of the accident is the direct explosion inside the bushing.According to the above process,the simulated method can be used to reconstruct the transformer explosion accident scene,which provides reference for accident investigation.