GE Multilin g60 - Page 259

GE Multilin G60 Generator Protection System 5-99
5 SETTINGS 5.4 SYSTEM SETUP
5
All five triggering functions and the user-definable condition are consolidated (ORed) and connected to the PMU recorder.
Each trigger can be programmed to log its operation into the event recorder, and to signal its operation via targets. The five
triggers drive the STAT bits of the data frame to inform the destination of the synchrophasor data regarding the cause of
trigger. The following convention is adopted to drive bits 11, 3, 2, 1, and 0 of the STAT word.
Figure 5–35: STAT BITS LOGIC
f) USER TRIGGERING
PATH: SETTINGS  SYSTEM SETUP  PHASOR MEASUREMENT...  PMU 1 TRIGGERING  PMU 1 USER TRIGGER
The user trigger allows customized triggering logic to be constructed from FlexLogic™. The entire triggering logic is
refreshed once every two power system cycles.
g) FREQUENCY TRIGGERING
PATH: SETTINGS  SYSTEM SETUP  PHASOR MEASUREMENT...  PMU 1 TRIGGERING  PMU 1 FREQUENCY TRIGGER
The trigger responds to the frequency signal of the phasor measurement unit (PMU) source. The frequency is calculated
from either phase voltages, auxiliary voltage, phase currents and ground current, in this hierarchy, depending on the source
configuration as per G60 standards. This element requires the frequency is above the minimum measurable value. If the
frequency is below this value, such as when the circuit is de-energized, the trigger will drop out.
• PMU 1 FREQ TRIGGER LOW-FREQ: This setting specifies the low threshold for the abnormal frequency trigger. The
comparator applies a 0.03 Hz hysteresis.
 PMU 1 USER
 TRIGGER
PMU1 USER TRIGGER:
Off
Range: FlexLogic™ operands
 PMU 1 FREQUENCY
 TRIGGER
PMU 1 FREQ TRIGGER
FUNCTION: Disabled
Range: Enabled, Disabled
MESSAGE
PMU 1 FREQ TRIGGER
LOW-FREQ: 49.00 Hz
Range: 20.00 to 70.00 Hz in steps of 0.01
MESSAGE
PMU 1 FREQ TRIGGER
HIGH-FREQ: 61.00 Hz
Range: 20.00 to 70.00 Hz in steps of 0.01
MESSAGE
PMU 1 FREQ TRIGGER
PKP TIME: 0.10 s
Range: 0.00 to 600.00 s in steps of 0.01
MESSAGE
PMU 1 FREQ TRIGGER
DPO TIME: 1.00 s
Range: 0.00 to 600.00 s in steps of 0.01
MESSAGE
PMU 1 FREQ TRIG BLK:
Off
Range: FlexLogic™ operand
MESSAGE
PMU 1 FREQ TRIGGER
TARGET: Self-Reset
Range: Self-Reset, Latched, Disabled
MESSAGE
PMU 1 FREQ TRIGGER
EVENTS: Disabled
Range: Enabled, Disabled
847004A1.CDR
FLEXLOGIC OPERANDS
PMU 1 VOLT TRIGGER
PMU 1 CURR TRIGGER
PMU 1 POWER TRIGGER
PMU 1 FREQ TRIGGER
SETTING
PMU 1 USER TRIGGER:
Off=0
OR
FLEXLOGIC OPERAND
PMU 1 TRIGGERED
PMU 1 ROCOF TRIGGER
OR
O
R
bit 0
bit 1
bit 2
bit 3, bit 11
PMU 1 recorder