IEEE C37.118.1-2011 - IEEE Standard for Synchrophasor Measurements for Power Systems

Standard Details

Synchronized phasor (synchrophasor) measurements for power systems are presented. This standard defines synchrophasors, frequency, and rate of change of frequency (ROCOF) measurement under all operating conditions. It specifies methods for evaluating these measurements and requirements for compliance with the standard under both steady-state and dynamic conditions. Time tag and synchronization requirements are included. Performance requirements are confirmed with a reference model, provided in detail. This document defines a phasor measurement unit (PMU), which can be a stand-alone physical 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.

Sponsor Committee	PE/PSRCC - Power System Relaying and Control
Status	Superseded
Superseded by	60255-118-1-2018
Amendment	C37.118.1a-2014
Board Approval	2011-12-07
History	Published Date:2011-12-28

Additional Resources Details

Pars	Approved PAR
Historical Base Standard	C37_118-2005

Working Group Details

Working Group	C37.118.1_WG - Synchrophasor Measurements for Power Systems
Working Group Chair	Kenneth Martin
Sponsor Committee	PE/PSRCC - Power System Relaying and Control
Society	PE - IEEE Power and Energy Society
IEEE Program Manager	Erin Spiewak
Existing Standards	Superseded C37.118.1a-2014 - IEEE Standard for Synchrophasor Measurements for Power Systems -- Amendment 1: Modification of Selected Performance Requirements Modifications in this amendment include some performance requirements with related text updates to correct inconsistencies and remove limitations introduced by IEEE Std C37.118.1(TM)-2011. It was discovered that a few requirements were not achievable with the published models as was intended and others were extremely difficult to meet with available hardware. This amendment modifies requirements in Table 4 through Table 10. Text was modified to support the requirement modification. Testing described in 5.5.9 was clarified, and Table 11 (formerly Table 12) was modified to match. Annex C was modified to keep it consistent with the rest of the document.
	Active 60255-118-1-2018 - IEEE/IEC Approved Draft International Standard - Measuring relays and protection equipment - Part 118-1: Synchrophasor for power system - Measurements This standard provides continuation and further development of previous synchrophasor standards, notably the IEEE C37.118 series. It defines synchrophasor, frequency, and rate of change of frequency (ROCOF) measurements as used in this technology. These definitions are in agreement with most research on and analysis of dynamic electric power system measurements, but may differ from those given in other contexts. Function and performance requirements are given for synchrophasor measurements. Tests, evaluation criteria, and error limits are provided to determine compliance with the requirements.