基于MATLAB / GUI的道路照明供电回路计算

谢曲天（长沙市规划勘测设计研究院，长沙市 410007）

Calculation of Road Lighting Power Supply Circuit Based on MATLAB / GUI

XIE Qutian(Changsha Planning & Design Survey Research Institute,Changsha 410007，China)

Abstract：The urban road lighting power supply circuit has the characteristic of long power supply distances. During design,it is generally required to verify the voltage loss of line and the sensitivity of circuit breaker,thus causing a lot of computational analysis. This article is about the computational procedure developed for the urban road lighting power supply circuit on the basis of MATLAB / GUI as a platform. First,it is necessary to derive the formulas for calculating both voltage loss and end earthing fault current of the urban road lighting power supply circuit,

then analyze the selection of low voltage protective electrical apparatuses,perform calculation in connection with the parameter tuning of circuit breaker and residual current operated protective device,and finally demonstrate the steps and usage of computational procedure by example.

Key words：road lighting;TN - S earthing system;voltage loss;earthing fault current;residual current operated protective device;MATLAB / GUI computational procedure;calculated current;leakage current

摘　要：城市道路照明供电回路具有供电距离远的特点，在设计中通常需要校验线路的电压损失及断路器的灵敏度，从而进行大量的计算分析。以MATLAB / GUI为平台开发了用于城市道路照明供电回路的计算程序。首先，推导出城市道路照明供电回路电压损失及末端接地故障电流计算公式；继而分析低压保护电器的选择，计算断路器及剩余电流动作保护器参数整定；最后，通过算例介绍计算程序的运行步骤及使用方法。

关键词：道路照明；TN - S接地系统；电压损失；接地故障电流；剩余电流动作保护器；MATLAB / GUI计算程序；计算电流；泄漏电流

中图分类号：TU88         　　　   文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2021.07.006