基于Simulink的中性线断线故障火灾危险性研究

Research on fire risk of open-neutral fault based on Simulink

根据三相四线制低压配电系统系统的组成和接地方式,进行中性线断开故障的型式分析,分析不同位置发生中性线断开故障时中性点偏移电压的计算方式及故障引起火灾的原因。基于MATLAB/Simulink软件建立三相四线制低压配电系统中性线断线故障模型并进行仿真模拟实验,归纳中性点断线故障引发火灾的特点,为进行中性线断线故障火灾调查提供参考。

According to the composition and grounding method of three-phase four-wire low-voltage power distribution system,the type of open-neutral fault was analyzed,the calculation methods of the displacement voltage of neutral points when the fault happens at different locations and the cause of fire were analyzed.Based on MATLAB/Simulink software,the open-neutral fault model of three-phase four-wire low-voltage power distribution system was established and operated,and the characteristics of fire caused by neutral point disconnection fault were summarized to provide some reference for the investigation of the fire caused by open-neutral.