CHAPTER 5: SETTINGS
SYSTEM SETUP
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
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This element responds to abnormal voltage. Separate thresholds are provided for low and high voltage. In terms of
signaling its operation, the element does not differentiate between the undervoltage and overvoltage events. The trigger
responds to the phase voltage signal of the Phasor Measurement Unit (PMU) source. All voltage channels (A, B, and C or AB,
BC, and CA) are processed independently and can trigger the recorder. A minimum voltage supervision of 0.1 pu is
implemented to prevent pickup on a de-energized circuit, similarly to the undervoltage protection element.
PMU 1 VOLT TRIGGER LOW-VOLT
— Specifies the low threshold for the abnormal voltage trigger, in per-unit of the PMU
source. 1 pu is a nominal voltage value defined as the nominal secondary voltage times VT ratio. The comparator applies a
1% hysteresis.
PMU 1 VOLT TRIGGER HIGH-VOLT
— Specifies the high threshold for the abnormal voltage trigger, in per-unit of the PMU
source. 1 pu is a nominal voltage value defined as the nominal secondary voltage times VT ratio. The comparator applies a
1% hysteresis.
PMU 1 VOLT TRIGGER PKP TIME
— Use to filter out spurious conditions and avoid unnecessary triggering of the recorder.
PMU 1 VOLT 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 5-94: Voltage trigger logic
5.5.7.15 Current triggering
SETTINGS
SYSTEM SETUP
PHASOR MEASUREMENT UNIT
PHASOR MEASUREMENT UNIT 1(6)
PMU 1(6)
TRIGGERING
PMU 1(6) CURRENT TRIGGER
PMU 1 VOLT TRIG BLK:
Off
Range: FlexLogic operand
PMU 1 VOLT TRIGGER
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
PMU 1 VOLT TRIGGER
EVENTS: Disabled
Range: Enabled, Disabled
PMU 1 CURRENT
TRIGGER
PMU 1 CURR TRIGGER
FUNCTION: Disabled
Range: Enabled, Disabled
PMU 1 CURR TRIGGER
PICKUP: 1.800 pu
Range: 0.100 to 30.000 pu in steps of 0.001
PMU 1 CURR TRIGGER
PKP TIME: 0.10 s
Range: 0.00 to 600.00 s in steps of 0.01
PMU 1 CURR TRIGGER
DPO TIME: 1.00 s
Range: 0.00 to 600.00 s in steps of 0.01
PMU 1 CURR TRIG BLK:
Off
Range: FlexLogic operand
PMU 1 CURR TRIGGER
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
Содержание N60
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