Research and application of substation safety communication technology based on MMS alternative protocol

At present, most substations are built based on IEC61850 standard, and the in-station communication protocols mainly include MMS(Manufacturing Message Specification), GOOSE(Generic Objective-Orient Substation Event), SMV(Sampling Measurement Value), and so on, which gradually exposes some deficiencies and security risks in engineering application practice. Therefore, based on MMS alternative protocol, its function and safety protection technology are introduced emphatically. In terms of functionality, the MMS alternative protocol adds multiple services and optimizes the shortcomings of the existing MMS protocol. In terms of safety protection technology, the application layer of MMS alternative protocol realizes the two-way identity authentication based on SM2 algorithm and scheduling certificate, which can prevent illegal access and attack of unauthorized devices and eliminate the insecurity of device connection from the source of protocol. The transmission layer of MMS alternative protocol realizes the full link encryption and authentication based on SM2 algorithm and scheduling certificate, which ensures that the transmitted data message is anti-forgery, anti-repudiation and anti-theft, and protects the confidentiality and integrity of data message. The test results show that the MMS alternative protocol has certain reference significance in engineering application. © 2021, Electric Power Automation Equipment Press. All right reserved.