GE L30 Instruction Manual page 252

5.4 SYSTEM SETUP
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 IEEE C37.118
configuration frame. 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 IEEE C37.118 configuration frame.
• PMU 1 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
L30 generates 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 L30 stops the transmission of reports. Note that 4 Hz is not allowed for an M-class 50 Hz system).
• PMU1 PHS-1 to PMU1 PHS-14: These settings specify synchrophasors to be transmitted from the superset of all syn-
chronized measurements. The available synchrophasor values are tabulated below.
SELECTION MEANING
Va First voltage channel, either Va or Vab
Vb Second voltage channel, either Vb or Vbc
Vc Third voltage channel, either Vc or Vca
5
Vx Fourth voltage channel
Ia Phase A current, physical channel or summation as per the source settings
Ib Phase B current, physical channel or summation as per the source settings
Ic Phase C current, physical channel or summation as per the source settings
Ig Fourth current channel, physical or summation as per the source settings
V1 Positive-sequence voltage, referenced to Va
V2 Negative-sequence voltage, referenced to Va
V0 Zero-sequence voltage
I1 Positive-sequence current, referenced to Ia
I2 Negative-sequence current, referenced to Ia
I0 Zero-sequence current
These settings allow for optimizing the frame size and maximizing transmission channel usage, depending on a given
application. Select "Off" to suppress transmission of a given value.
• PMU1 PHS-1 NM to PMU1 PHS-14 NM: These settings allow for custom naming of the synchrophasor channels. Six-
teen-character ASCII strings are allowed as in the CHNAM field of the configuration frame. These names are typically
based on station, bus, or breaker names.
• PMU1 A-CH-1 to PMU1 A-CH-16: These settings specify any analog data measured by the relay to be included as a
user-selectable analog channel of the data frame. Up to 16 analog channels can be configured to send any FlexAnalog
value from the relay. Examples include frequency, rate of frequency change, active and reactive power, per phase or
three-phase power, power factor, temperature via RTD inputs, and THD. The configured analog values are sampled
concurrently with the synchrophasor instant and sent as 32-bit floating-point values scaled to Engineering units.
• PMU1 A-CH-1 NM to PMU1 A-CH-16 NM: These settings allow for custom naming of the analog channels. Sixteen-
character ASCII strings are allowed as in the CHNAM field of the configuration frame.
• PMU1 D-CH-1 to PMU1 D-CH-16: These settings specify any digital flag measured by the relay to be included as a
user-selectable digital channel of the data frame. Up to sixteen digital channels can be configured to send any Flex-
Logic operand from the relay. The configured digital flags are sampled concurrently with the synchrophasor instant.
These values are mapped into a two-byte integer number, with byte 1 LSB corresponding to the digital channel 1and
byte 2 MSB corresponding to digital channel 16.
5-116 L30 Line Current Differential System
5 SETTINGS
GE Multilin