Phasor Measurement Unit - GE T60 Instruction Manual

5.4 SYSTEM SETUP
a) MAIN MENU

PATH: SETTINGS SYSTEM SETUP
 PHASOR MEASUREMENT
 UNIT
The T60 is provided with an optional phasor measurement unit feature. This feature is specified as a soft-
ware option at the time of ordering. The number of phasor measurement units available is also dependent
on this option. See the Ordering section of chapter 2 for details.UR Synchrophasor Implementation
PHASORS
are referred to as a
nomena for improved power system monitoring, protection, operation, and control can be realized if Synchrophasors from
different locations within the power system are networked to a central location.
The T60 offers PMU features over two communication standards, IEC61850-9-5 and IEEE C37.118. The figure shows
complete Synchrophasor implementation.
5
UR Implementation of IEC61850-90-5
Synchrophasor data as measured and calculated by phasor measurement units (PMUs) is very useful to assess the condi-
tion of the electrical power network. The IEEE C37.118 standards define synchrophasors and related message formats to
transmit synchrophasor data. Synchrophasor streaming via IEEE C37.118 has proven to work but the desire to have a
communication mechanism that is compliant with the concept of IEC 61850 has led to the development of IEC61850-90-5.
The IEC61850-90-5 standard defines the packet structure for multicast routing of streamed Sampled Value (SV) known as
R-SV.
Firmware versions 7.0 and above have a 90-5 based R-SV implementation equivalent in structure and configuration to that
of the existing C37.118 implementation of firmware version 6.0, that is, synchrophasor data at rates up to 60 Hz for meter-
ing and 120 Hz for protection class synchrophasors. The two figures below depict the general data flow for the generation
of synchrophasor data for IEC61850-90-5. In the first figure, when IEC61850-90-5 is selected all real and virtual sources
are available for the IEC61850-90-5 PMUs.
5-126


PHASOR MEASUREMENT UNIT

 PHASOR MEASUREMENT
 UNIT 1
 AGGREGATOR
MESSAGE
 UNIT 1
 IEC 90-5 MSVCB
MESSAGE
 CONFIGURATION
are used within protection relays. If these phasors are referenced to a common time base they
SYNCHROPHASOR
Figure 5–44: COMPLETE SYNCHROPHASOR IMPLEMENTATION
T60 Transformer Protection System
5.4.8 PHASOR MEASUREMENT UNIT
See below.
See page 5-145.
See page 5–147.
. A vastly improved method for tracking power system dynamic phe-
5 SETTINGS
GE Multilin