电厂变电站低压开关柜过热故障在线监测系统设计与运行调试

Design and Operation Debugging of an Online Monitoring System for Overheating Faults in Low-voltage Switchgear in Power Plant Substations

文章分别对低压开关柜过热故障三线监测系统的硬件设计、软件设计展开了分析,提出硬件设计时,利用光纤式温度监测仪监测低压开关柜,并运用单总线数字式温度传感器读取温度数据。软件系统采用的是多线程编程模式,分别对温度显示控制、温度报警提示、数据通信三项功能进行了设计。最后通过现场安装与调试运行,验证了在线监测系统的稳定性,其功能可以满足电厂变电站低压开关过热故障预控要求,能保障开关柜安全运行。

This article analyzes the hardware and software design of a three line monitoring system for overheating faults in low-voltage switchgear.It is proposed to use a fiber optic temperature monitoring instrument to monitor the low-voltage switchgear during hardware design,and use a single bus digital temperature sensor to read temperature data.The software system adopts a multi-threaded programming mode,which has designed three functions:temperature display control,temperature alarm prompt,and data communication.Finally,through on-site installation and debugging,the stability of the online monitoring system was verified.Its function can meet the pre control requirements for low-voltage switch overheating faults in power plant substations and ensure the safe operation of the switchgear.