110kV Digital Substation System Reform Hanzhong Xinyuan

Substations automation technology have reached a certain level after more than ten years of development,the substations built in previous years adopt comprehensive automation system mostly. However, some problems that affect the safe operation of the traditional substations are still unsolved in the comprehensive automation system substations. such as: equipment are connected by a large numbers of cable, there exist the electromagnetic interference and additional errors in the transmission of simulate signal; poor security exist in secondary circuit; the online monitoring information of the primary device can not be shared, lack of a unified information model and communication standards, the station information can not be shared, resulting in the re-use and waste of physical equipment. For the above problems, it can not be solved and avoided through traditional technologies but it is just the characteristic and advantage of digital substation to solve these problems, therefore, the design that 110kV substation digital engineering. reform of Hanzhong Xinyuan is based on this.As the digitalization substations in China is still in elementary stage, therefore, in the design process of 110kV substation reform projects of Xinyuan, according to the successful experience of digital transformation at home and abroad , adopting digital information network that is based on IEC61850 standard. And Bring forward a implementation plan of this system and part of digital selection of the equipment and so on.Through the design, to simplify the secondary circuit, reduce the number of automation equipment, saving investment, and improve the overall reliability of substation automation; use new transformer technology and increase the right action rate of protection, and by using unified modeling technology and communication interface, make it convenient for the upgrading and maintenance of the equipment and in order to expand substations. The completion of the project, will provide valuable experience to the similar projects in future.