Research On The Digital Interface Of Electronic Current Transformer

Well-designed interface between electronic instrument transformers and secondary equipment can not only simplify secondary equipment, but also improve veracity and reliability of the whole system. The interface standardization will urge optimization of substation automation communication-control system. Benefited from interface standardization, information sharing and system integration in substation will come true finally.In this paper, Firstly IEC60044-8 and the IEC61850-9-1 standard agreement have been analyzed, then designed software and hardware of the digital output interface according to the agreement. This article has conducted the deep research on ARM7(S3C44B0X) architecture, the interface principle,theμCLinux operating system and so on. TheμCLinux transplantation on ARM7 has been finished. The network driver as well as the application procedure of RTL8019 have been compiled. Based on the study of the TCP/IP agreement and the socket network interface programming, the data ethernet transmission has been realized, and satisfying the real-time and reliability of the system request.