IEEE-1588 STANDARD FOR A PRECISION CLOCK SYNCHRONIZATION PROTOCOL FOR NETWORKED MEASUREMENT AND CONTROL SYSTEMS AND APPLICATIONS TO THE POWER INDUSTRY

摘要

Electronic measurement and control systems are found throughout modern power systems. These measurement and control systems typically involve the exchange of information between one or more controllers and numerous IEDs. Correct operation of these systems requires that the temporal relationships between sensor reading, time tagging, and controller computations be synchronized. Synchronization requirements are dictated by the kinds of correlations and analysis to be applied to the data, the parameters of the control loops, the characteristics of the plant under control, and the overall system accuracy requirements. This paper discusses the implementation of synchronization in power system measurement and control systems and the potential role of IEEE 1588 in this implementation. Traditionally these systems have been implemented with proprietary or industry specific computation, synchronization, and communication protocols and techniques. In recent years the industry has started to use technologies and components developed for the general computing environment. Cost, bandwidth and ease of use have been the driving forces behind this trend. This trend is reflected in ongoing standards work. For example, based on the work first initiated by the Electrical Power Research Institute under Research Project 3599, IEEE P1525 specifies communications based on TCP/IP and UDP/IP in an Ethernet LAN environment. IEC 61850 takes a similar approach. Both also exploit technologies developed in the general computing environment for data handling, configuration, etc. including object models, XML, ASN.1 and others.