GE UR Series L90 Instruction Manual page 253

5 SETTINGS
d) PMU TRIGGERING OVERVIEW

PATH: SETTINGS SYSTEM SETUP
 PMU 1
 TRIGGERING
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
Each logical phasor measurement unit (PMU) contains five triggering mechanisms to facilitate triggering of the associated
PMU recorder, or cross-triggering of other PMUs of the system. They are:
• Overfrequency and underfrequency.
• Overvoltage and undervoltage.
• Overcurrent.
• Overpower.
• High rate of change of frequency.
The pre-configured triggers could be augmented with a user-specified condition built freely using programmable logic of the
relay. The entire triggering logic is refreshed once every two power system cycles.
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.
e) USER TRIGGERING

PATH: SETTINGS SYSTEM SETUP
 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.
GE Multilin
 
PHASOR... PHASOR MEASUREMENT UNIT 1
 PMU 1 USER
 TRIGGER
 PMU 1 FREQUENCY
 TRIGGER
 PMU 1 VOLTAGE
 TRIGGER
 PMU 1 CURRENT
 TRIGGER
 PMU 1 POWER
 TRIGGER
 PMU 1 df/dt
 TRIGGER
Figure 5–43: STAT BITS LOGIC

PHASOR MEASUREMENT...
PMU1 USER TRIGGER:
Off
L90 Line Current Differential System

PMU 1 TRIGGERING
See page 5-115.
See page 5-116.
See page 5-117.
See page 5-118.
See page 5-119.
See page 5-121.
 
PMU 1 TRIGGERING PMU 1 USER TRIGGER
Range: FlexLogic operands
5.4 SYSTEM SETUP
5
5-115