Phasor Measurement Unit - GE L90 Instruction Manual

5.4 SYSTEM SETUP
a) MAIN MENU
PATH: SETTINGS SYSTEM SETUP
PHASOR MEASUREMENT
UNIT
The L90 Line Current Differential System is provided with an optional phasor measurement unit feature.
This feature is specified as a software option at the time of ordering. The number of phasor measurement
units available is also dependent on this option. Refer to the Ordering section of chapter 2 for additional
details.
UR Synchrophasor Implementation
are used within protection relays. If these phasors are referenced to a common time base they are referred to as
PHASORS
a . A vastly improved method for tracking power system dynamic phenomena for improved power system
SYNCHROPHASOR
monitoring, protection, operation, and control can be realized if Synchrophasors from different locations within the power
system are networked to a central location. The complete Synchrophasor implementation for Firmware version 6.0 is
shown in the figure below.
5
The specifics of implementation by model number is summarized in the table below.
Table 5–6: IMPLEMENTATION BY MODEL NUMBER
MODEL
N60
D60, F60, G60, L30,
L90, T60
Depending on the applied filter, the Synchrophasors that are produced are classified as either P (protection) or M (meter-
ing) class Synchrophasors as described in the latest C37.118 standard. Sychrophasors available within the UR that have
no filtering applied are classified as NONE. Depending on the model number, the UR can support up to a maximum of three
DSP's. The four PMUs within the UR can be configured to read the sychrophasors from any of the six sources at a user
programmable rate. When one source is selected by one PMU it cannot be used in other PMUs. In firmware version 6.0 a
maximum of two aggregators allow the user to aggregate selected PMUs as per IEC 37.118 to form a custom data set that
is sent to a client optimizing bandwidth. As with sources, a given aggregator can aggregate data form PMUs with the same
5-86

PHASOR MEASUREMENT UNIT

PHASOR MEASUREMENT
UNIT 1
REPORTING OVER
MESSAGE
NETWORK
Figure 5–31: COMPLETE SYNCHROPHASOR IMPLEMENTATION
NUMBER OF NUMBER OF
PMUS AGGREGATORS
4 2
1 1
L90 Line Current Differential System
5.4.8 PHASOR MEASUREMENT UNIT
See below.
See page 5-103.
NUMBER OF ANALOG
INPUTS
16
16
5 SETTINGS
GE Multilin