GE L90 Instruction Manual page 235

5 SETTINGS
MESSAGE
MESSAGE
MESSAGE
This section contains basic phasor measurement unit (PMU) data, such as functions, source settings, and names.
• PMU 1 FUNCTION: This setting enables the PMU 1 functionality. Any associated functions (such as the recorder or
triggering comparators) will not function if this setting is "Disabled". Use this setting to permanently enable or disable
the feature.
• PMU 1 IDCODE: This setting assigns a numerical ID to the PMU. It corresponds to the IDCODE field of the data, con-
figuration, header, and command frames of the C37.118 protocol. The PMU uses this value when sending data, config-
uration, and header frames; and it responds to this value when receiving the command frame. This is used when only
data from one PMU is present.
• PMU 1 STN: This setting assigns an alphanumeric ID to the PMU station. It corresponds to the STN field of the config-
uration frame of the C37.118 protocol. This value is a 16-character ASCII string as per the C37.118 standard.
• PMU 1 SIGNAL SOURCE: This setting specifies one of the available L90 signal sources for processing in the PMU.
Note that any combination of voltages and currents can be configured as a source. The current channels could be con-
figured as sums of physically connected currents. This facilitates PMU applications in breaker-and-a-half, ring-bus, and
similar arrangements. The PMU feature calculates voltage phasors for actual voltage (A, B, C, and auxiliary) and cur-
rent (A, B, C, and ground) channels of the source, as well as symmetrical components (0, 1, and 2) of both voltages
and currents. When configuring communication and recording features of the PMU, the user could select – from the
above superset – the content to be sent out or recorded. When one source is selected by one PMU, it cannot be
selected by another PMU.
• PMU 1 CLASS (Range P, M, None): This setting selects the synchrophasor class. Note that a reporting rate of 100 or
120 can only be selected for class P synchrophasors and if the system frequency is 50 Hz or 60 Hz, respectively.
• PMU 1 NETWORK REPORTING FORMAT: This setting selects whether synchrophasors are reported as 16-bit inte-
gers or 32-bit IEEE floating point numbers. This setting complies with bit-1 of the FORMAT field of the C37.118 config-
uration frame. Note that this setting applies to synchrophasors only; the user-selectable FlexAnalog™ channels are
always transmitted as 16-bit integer values.
• PMU 1 NETWORK REPORTING STYLE: This setting selects whether synchrophasors are reported in rectangular
(real and imaginary) coordinates or in polar (magnitude and angle) coordinates. This setting complies with bit-0 of the
FORMAT field of the C37.118 configuration frame.
• PMU 1 REPORTING RATE: This setting specifies the reporting rate for the network (Ethernet) port. This value applies
to all PMU streams of the device that are assigned to transmit over this aggregator. For a system frequency of 60 Hz
(50 Hz), the L90 will generate a reporting mismatch message if the selected rate is not set as 10 Hz, 12 Hz, 15 Hz,
20 Hz, 30 Hz, 60 Hz, or 120 Hz (or 10 Hz, 25 Hz, 50 Hz or 100 Hz when the system frequency is 50 Hz) when entered
via the keypad or software; and the L90 will stop the transmission of reports. See the tables below for additional detail.
Note that for firmware 6.0 a maximum of two PMUs can be set to a reporting rate of 120 Hz for a 60 Hz system (or
100 Hz for 50 Hz system).
GE Multilin
PMU 1 D-CH-16:
Off
PMU 1 REC D-CH-16
NM: DigChannel16
PMU 1 REC D-CH-16
NORMAL STATE: Off
L90 Line Current Differential System
5.4 SYSTEM SETUP
Range: FlexLogic™ operand
Default: Off
Range: 16-character ASCII string
Default: DigChannel16
Range: Off, On
Default: Off
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