35kV真空灭弧室真空度在线监测系统的研制

为了监测真空灭弧室内真空度的状况,并保证供电的连续性和可靠性,笔者设计了一套应用于35kV真空断路器的真空灭弧室真空度在线监测系统。详细阐述了系统的工作原理、硬件结构和软件设计方案。该系统利用旋转式电场探头,监测屏蔽罩附近直流电场的变化,同时开发了下位机数据采集单元和上位机监控管理单元,可以远程在线监测真空灭弧室的真空度变化情况。现场运行结果表明,该系统可以稳定、可靠地监测真空灭弧室内真空度的改变,测量灵敏度高,成本低廉、运行可靠、抗干扰能力强。

Development of an On-line Monitoring System of Vacuum Pressure in 35 kV Vacuum Interrupter

An on-line monitoring system of vacuum pressure for 35 kV vacuum interrupter was designed in order to monitor the vacuum condition in vacuum interrupter and to ensure the continuity and reliability of electricity power supply.The operation principle,hardware structure and software plan of the system were explained.The system can evaluate the internal pressure of the vacuum interrupter by monitoring the static charge around shield using electric field sensors with rotating electrode.Moreover,a data-collecting device and a controller were also developed for long-range and on-line monitoring.The result shows that this system runs steadily and reliably with low cost and high anti-interference performance.