Synchrophasor Standards Development - IEEE C37.118 & IEC 61850

The concept of a phasor synchronized with the power system was introduced in the 1980s and standardized for the first time with the standard IEEE 1344. That measurement concept was further developed in the current synchrophasor standard, IEEE C37.118 that was completed in 2005. It is currently undergoing revision to fully define the measurement in all conditions including dynamic changes in the power system. The standard has been split into measurement and data exchange to harmonize it with the IEC 61850 standard. This paper summarizes the synchrophasor concept, reviews the governing standards, and surveys the ongoing standards development.