Remote Monitoring and Control System of Underground Substation Based on CAN Bus and Ethernet
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摘要: 为了提高煤矿井下变电所检测数据和控制数据的可靠性和实时性,提出了一种基于CAN总线和以太网的煤矿井下变电所远程监控系统的设计方案。该系统采用高压开关综合保护器将煤矿井下变电所各种保护检测信号转换成CAN总线数据,每个变电所设置1个或多个监控分站;监控分站采用基于PIC18F4680单片机和ENC28J60以太网控制器开发的CAN总线-以太网协议转换器将CAN总线数据转换成以太网数据帧,并通过以太网传输;地面监控中心的上位机采用多线程技术将以太网数据帧转换为Modbus协议数据,实现对井下变电所的远程监测与控制功能。实际应用表明,采用CAN总线和以太网的网络结构可以较好地满足煤矿井下变电所远程监控系统的要求。Abstract: In order to improve reliability and real-time of detection data and control data of underground substation,the paper proposed a design scheme of remote monitoring and control system of underground substation based on CAN bus and Ethernet.The system uses high-voltage switch integrated protector to convert various protection and detection signals of underground substation to CAN bus data,and each substation sets one or more monitoring substations.The monitoring substation uses CAN bus-Ethernet protocol converter developed by PIC18F4680 and ENC28J60 to convert CAN bus data to Ethernet data frames,then transmit data by Ethernet.The upper computer of surface monitoring and control center uses multithread technology to convert Ethernet data frames to Modbus protocol data,which can realize functions of remote monitoring and control for underground substation.The actual application showed that network structure of using CAN bus and Ethernet can meet requirements of remote monitoring and control system of underground substation perferably.
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