变电站间隔层的保护测控单元可以通过网络交换信息和数据，因而CAN总线网构成了高效率信息、数据网络。
With high efficiency of CANbus network, the protection & monitor units of substation bays can exchange information through the network quickly to achieve data sharing in substation automation systems.
主控计算机与各lcu中的监控单元和保护单元通过CAN总线通信，LCU中的PLC通过RS - 485接口与主控计算机通信。
Host computer communicates with the monitor unit and the protection unit of LCUs through the CAN bus. PLC in LCU communicates with host computer through the RS-485 port.
为此，提出了一种基于CAN总线的分布式中低压母线保护方案。
In view of that, this paper puts forward a kind of distributed middle voltage busbar protection scheme based CAN bus.
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