当电气线路中出现过载电流以及非周期电流的情况时容易引起线路超温，进而引发电气火灾。但现有的电气数据量不足以支持电气线路超温预警模型的训练，因此对电气线路超温的诱因进行仿真建模是很有必要的。提出了一种针对电气线路中出现过载电流以及非周期电流情况时的仿真模型，旨在模拟实际工况下电气线路出现该情况时的电流变化情况。该模型主要由恒功率负载模块、非周期电流模块、总控模块等部分组成。结果表明，该模型对电气线路发生1.1~1.4倍的过载电流以及产生波前时间0~0.2 s、波后时间0.1~0.4 s的非周期电流有较好的模拟能力，同时可以通过模型仿真生成大量数据，为电气火灾的预测和预防提供有效的数据支撑。

When there is overload current and non-periodic current in the electrical circuit, it is easy to cause overheating of the line, and then cause electrical fire. However, the amount of existing electrical data is not enough to support the training of the electrical circuit over-temperature warning model, so it is necessary to simulate and model the causes of electrical circuit over-temperature. A simulation model for overload current and non-periodic current conditions in electrical circuits was proposed, which aims to simulate the current changes of electrical circuits under actual working conditions. The model is mainly composed of a constant power load module, a non-periodic current module, and a master control module. The results show that the model has a good simulation ability for the overload current of 1.1 ~ 1.4 times of the electrical circuit and the non-periodic current of 0 ~ 0.2 s and 0.1 ~ 0.4 s after the wavefront, and a large amount of data can be generated through the model simulation, which provides effective data support for the prediction and prevention of electrical fires.