输电线路着火模型及分析

Ignition models of insulating layer of electric wiring

分析了输电线路绝缘层电热着火的原因 ,建立了两种着火模型 ,并给出了相应的边界条件。对模型的分析计算揭示了导线电流、绝缘层尺寸及绝缘材料物理化学性质与导线外围散热条件之间的相互制约关系。该模型对分析线路起火原因 ,预防电气火灾的发生具有实际意义。

Ignition of insulating layer of electric wiring is discussed Two models of ignition are developed and their boundary conditions are given Relation between dimensionless electricity β and ignition criteria δcr is analyzed The results of this research are valuable for prevention against electrical fire hazard