智能变电站开关柜综合状态监测IED设计

Design of IED for Switch Cabinets' Comprehensive Status Monitoring in Smart Substations

针对现代电力开关柜设计了一种基于物联网技术并符合变电站IEC61850标准的应用于变电站间隔层的新型开关柜综合状态监测智能电子设备(IED)。该IED采用ARM+DSP双CPU架构为硬件核心,以VxWorks实时操作系统和C语言为软件开发平台,嵌入符合IEC61850标准的IED性能描述文件(ICD),解析IRIG-B码进行同步对时,通过ZigBee无线网络和RS485/RFID/CAN总线实现与开关柜在线监测装置(过程层)的数据传输,按照IEC61850标准规约用光纤与综合应用服务器(站控层)进行通信。此外,还完成了开关柜综合状态监测系统结构设计、IED硬件电路设计、软件平台的构建以及IEC61850的信息建模。实际运行结果表明,该开关柜综合状态监测系统能够远程对所有开关柜状态进行综合采集、分析、传输与监测,并将这些功能融合到一体化信息平台诊断中。

A new intelligent electronic device （IED） for switch cabinet comprehensive on-line condition monitoring based on Internet of Things and IEC 61850 standard is designed for the substation spacer layer. The device adopts double cpu structure of ARM ＋DSP as hardware core with VxWorks and C language for its software development platform; embedded with ICD files meeting the IEC 61850 standard, the IRIG-B code is used for synchronous clock. Through the Zigbee and RS485/RFID/CAN, the data transmission from the sensors to the monitoring units （the process layer） is realized, and the communication with the monitoring center （the substation control layer） by the optical fiber is conformed with IEC 61850. Moreover, the monitoring system framework, the IED＇s hardware, software platform and IEC 61850 information modeling are designed. The practical operation shows that the IED can fulfill the functions of signal remote-collection, analysis, transmission and monitoring in all status and integrate them into the synthetical diagnosis on the information platform.