基于IEC61850的嵌入式合并单元的研究

Research on embedded system merging unit based on IEC 61850

随着电子互感器的出现,合并单元作为将瞬时电流电压信号以指定帧格式传送给保护、控制装置而出现在变电站通信系统中。为满足IEC 61850标准对变电站自动化系统以及智能设备所提出的互操作性、实时性和稳定性要求,提出了一种新型的电子式互感器与智能设备间的数字通信接口——嵌入式合并单元,该设备采用ARM处理器,具有高可靠性和强实时性。先从合并单元的功能进行分析,研究了基于ARM的装置的功能实现,然后研究和分析了合并单元信息模型的构建,最后简单介绍了用于装置的自我描述的SCL配置文件的基本格式。

Along with the application of electronic transformers the merging units appear in the communication network of substation, it is responsible for encapsulation instantaneous digital current and voltage signals according to the specified frame format and transmitting the data stream to the protection/control equipments. This paper researches a new digital communication interface based on IEC 61850,i.e embedded system merging unit, which connects electronic transformers and intelligent electronic devices to meet the IEC 61850 standard for automation power station operation. A controller advanced RISC machine（ARM） with the embedded system is used for this device, which provides a stable and real-time processing capability. The paper analyses the function of merging unit, researches its realization way then researches and analyses merging unit information model. Finally, this paper introduces configuration file for the self-description of devices by Substation Configuration Description Language（SCL）.