Grid structure perspective drawing: to enquire by the grid level structure of electricity supply unit substation line substation area etc.
电网结构透视图：按照供电单位、变电站、线路、台区等电网层次结构进行杳询。
The problem is discussed on connecting between management unit of DC control power system and field bus of the substation automation system.
对直流系统管理单元纳入变电所综合自动化系统现场总线进行了研究。
This paper presents a substation automation system based on Fieldbus where PLC is used as the control unit.
本文提出了一个构建在现场总线网络之上，采用PLC作为控制单元的变电站自动化系统的实现方案。
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