Power System Clock Synchronization Method Based on Service Interoperability

Abstract

With the development of power system in recent years, it is changing from the direction of smart grid. It is forming a system composed of a large number of intelligent devices with multiple features, producing a large number of heterogeneous and related data. However, there is the problem of information closure in the system, because different systems and equipment come from different manufacturers, and based on different standards, there will be information closure between each other. So it has become an important topic for the power industry to establish the relationship and form interoperability. In view of the above problems, this paper first proposes a service interoperability architecture, which is used to solve the problem of information closure and promote the efficient collaboration between multiple devices and businesses. At the same time, in the process of service interoperability, due to the real-time and deterministic requirements of data transmission, this paper studies the IEEE802.1AS clock synchronization protocol, analyzes the delay measurement principle and time synchronization principle in the protocol, proposes a clock synchronization method based on IEEE802.1AS and service interoperability, and proposes an OPC UA based clock synchronization method Finally, the proposed method is proved to be effective in power system.