基于振动声学的变电站开关类设备在线监测技术

On-line Monitoring Techniques for Switch Apparatus in Power Station Based onVibrational-Acoustics

开关类设备是电力系统中的重要组成部分,实施基于振动声学的在线监测与故障诊断对提高设备稳定性及供电可靠性具有重要意义。介绍了气体全封闭组合电器、隔离开关及断路器振动声学监测技术、信号处理方法及状态评价特征参量,并提出了基于数字变电站及智慧变电站建设要求的在线监测系统架构。振动声学监测适用于开关类设备的在线监测,不影响设备正常运行,且与设备无电气连接,具有安全、可靠性高等优点。

Switch apparatus are important components in power system.On-line monitoring and fault diagnosis based on vibrational-acoustics have significant meaning for improving the stability of apparatus and the reliability of power supplement.The on-line monitoring techniques of vibrational-acoustics,signal processing methods,and feature parameters of condition assessment for gas-insulated switchgear,disconnecting switch,and circuit breaker are introduced.In addition,the framework of on-line monitoring system according to the requirement of digitalized substation and intelligent substation is proposed.Vibrational-acoustics method is proper for on-line monitoring of switch apparatus,which not influences the normal operation of apparatus and is electrical contactless and has advantages of safe and high reliability.