All Digital Power Monitoring Technology In The Rail Transportation Of Electric Power Monitoring System Shanghai Jiao Tong University

With all aspects of technology out as computer technology,control technology and the rapid development of network technology,the development model and structure of China’s urban rail transit power monitoring system has also been upgraded gradually from the initial monitoring system for the integration of the old network model,and is still in constant change progress.And old-fashioned traditional substation is different,computer integrated substation intelligent digital information systems,network devices and run a secondary device is typical of modern digital substation.Traditional digital substation substation to the process is long and arduous,requiring long-term exploration and practice.IEC61850 protocol development situation in the country,its application in digital substation are constantly being explored,there are a variety of IEC61850 protocol allows manufacturers of digital substation equipment of different types of information can be shared via a digital communications network consulting and implementation of equipment interoperability between.We have designed a program based on the substation level by IEC61850-8-1 device with a spacer layer protocol for data exchange, based on the process of establishing Fast Ethernet layer, in order to fully realize data sharing, which can fully support the IEC61850-9-1 agreement. Using unconventional electronic transformer,using fiber optic unit is connected with the top of the merger, the combined unit and then processed the data uploaded to the course of the bus;conventional equipment such information breakers, transformers and rectifier devices are digitally controlled through its own means the status parameter information element is transmitted to the process of the layer together.IEC61850 and IEC61850 Protection and Control IED and then upload the data collected from the process level to the substation level Ethernet.Such programs use a higher degree of IEC61850 protocol layer in the process of being and substation control layer are achieved with IEC61850 standard protocol-based communication framework model, the sharing of information sharing and the manufacturers of equipment and interoperability aspects the use of more in-depth,so the degree of digitization is relatively higher.The above is based on a different basis and the transformation of the Statute of IEC61850 substation of the traditional,through the transformation to achieve compatibility between devices so that the degree of digitization of traditional substation has been significantly improved.Finally,based on the design of the electronic transformer combined unit,based on the combined unit commitment necessary requirements for its function,will be merged into the unit design and analysis of each of the three aspects,these three are: data receiving unit The data processing unit and a data transmitting unit.And analyze and discuss the results of its experimental demonstration proved that this scheme can be accurately and efficiently complete the process layer communication devices should bear function.