含有理想变压器的电阻性电路本质安全性能分析

Analysis of Intrinsic Safety Performance of Resistive Circuit with Ideal Transformer

对于含有理想变压器的电阻性电路,由于存在阻抗变换特性,一次侧和二次侧的本安性能需要在不同电压等级下进行评判。在放电电流线性衰减模型和最小点燃曲线的基础上,分析了变压器阻抗变换特性对电阻性电路本安性能的影响,得出理想变压器电压高压测点燃危险性高的结论。最后通过火花试验指出放电能量服从正态分布,并从放电能量角度验证了上述结论。

For resistive circuits with ideal transformers,due to the impedance transformation characteristics,the intrinsic safety performance of the primary and secondary sides need to be evaluated at different voltage levels.Based on the linear attenuation model of the discharge current and the minimum ignition curve,the influence of the impedance transformation characteristics of the transformer on the intrinsic safety performance of the resistive circuit is analyzed,and the conclusion that the ignition risk of the ideal transformer voltage is high.Finally,the spark test indicates that the discharge energy obeys the normal distribution,and the above conclusion is verified from the perspective of the discharge energy.