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N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
SYSTEM SETUP
CHAPTER 5: SETTINGS
5
The trigger responds to the frequency signal of the Phasor Measurement Unit (PMU) source. The frequency is calculated
from among phase voltages, auxiliary voltage, phase currents, and ground current, in this hierarchy, depending on the
source configuration as per N60 standards. This element requires that the frequency be above the minimum measurable
value. If the frequency is below this value, such as when the circuit is de-energized, the trigger drops out.
PMU 1 FREQ TRIGGER LOW-FREQ
— Specifies the low threshold for the abnormal frequency trigger. The comparator applies a
0.02 Hz hysteresis.
PMU 1 FREQ TRIGGER HIGH-FREQ
— Specifies the high threshold for the abnormal frequency trigger. The comparator applies
a 0.02 Hz hysteresis.
PMU 1 FREQ TRIGGER PKP TIME
— Use to filter out spurious conditions and avoid unnecessary triggering of the recorder.
PMU 1 FREQ TRIGGER DPO TIME
— Use to extend the trigger after the situation returns to normal. This setting is of importance
when using the recorder in the forced mode (recording as long as the triggering condition is asserted).
Figure 5-93: Frequency trigger logic
5.5.7.14 Voltage triggering
SETTINGS
SYSTEM SETUP
PHASOR MEASUREMENT UNIT
PHASOR MEASUREMENT UNIT 1(6)
PMU 1(6)
TRIGGERING
PMU 1(6) VOLTAGE TRIGGER
PMU 1 FREQ TRIGGER
PKP TIME: 0.10 s
Range: 0.00 to 600.00 s in steps of 0.01
PMU 1 FREQ TRIGGER
DPO TIME: 1.00 s
Range: 0.00 to 600.00 s in steps of 0.01
PMU 1 FREQ TRIG BLK:
Off
Range: FlexLogic operand
PMU 1 FREQ TRIGGER
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
PMU 1 FREQ TRIGGER
EVENTS: Disabled
Range: Enabled, Disabled
PMU 1 VOLTAGE
TRIGGER
PMU 1 VOLT TRIGGER
FUNCTION: Disabled
Range: Enabled, Disabled
PMU 1 VOLT TRIGGER
LOW-VOLT: 0.800 pu
Range: 0.250 to 1.250 pu in steps of 0.001
PMU 1 VOLT TRIGGER
HIGH-VOLT: 1.200 pu
Range: 0.750 to 1.750 pu in steps of 0.001
PMU 1 VOLT TRIGGER
PKP TIME: 0.10 s
Range: 0.00 to 600.00 s in steps of 0.01
PMU 1 VOLT TRIGGER
DPO TIME: 1.00 s
Range: 0.00 to 600.00 s in steps of 0.01