This standard is for synchronized phasor measurement systems in power systems. It defines synchronized phasor (synchrophasor), frequency, and rate of change of frequency (ROCOF) measurements. It describes time tag and synchronization requirements for measurement of all three of these quantities. It specifies methods for evaluating these measurements and requirements for compliance with this standard under both static and dynamic conditions. It defines a phasor measurement unit (PMU), which can be a physical stand-alone unit or a functional unit within another physical unit. This standard does not specify hardware, software, or a method for computing phasors, frequency, or ROCOF.
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