GE L90 Instruction Manual page 228

5.4 SYSTEM SETUP
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) and GOOSE messages known as the R-SV and R-GOOSE respectively.
Firmware version 7.0 has a 90-5 implementation equivalent in structure and configuration to that of the existing C37.118
implementation of firmware version 6.0 i.e., support for four streams of 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.
Firmware version 7.0 allows the N60 to support a maximum of four Logical Device PMUs (Logical Device 2 through 5) and
four aggregators (located in Logical Device 1 (LD1)), while other UR family members support one PMU and only one
aggregator. The control blocks for the aggregators are located in LD1. A 64 char LDName setting is provided, see 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
Precise time input to the relay from the international time standard, via either IRIG-B or PTP, is vital for correct syn-
chrophasor measurement and reporting. For IRIG-B, a DC level shift IRIG-B receiver must be used for the phasor
measurement unit to output proper synchrophasor values.
NOTE
5-98
Figure 5–36: N60 SUPPORT FOR FOUR LOGICAL DEVICE PMUS
NUMBER OF NUMBER OF
PMUS AGGREGATORS
4 4
1 1
L90 Line Current Differential System
NUMBER OF ANALOG
INPUTS
16
16
5 SETTINGS
GE Multilin