GE Multilin G650, Manual

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GEK-113285A G650 Generator Protection & Control System 5-81
5 SETTINGS 5.5 CONTROL ELEMENTS
5
5.5.4.3 SETTINGS
Setpoint > Control Elements > Synchrocheck
There is only one synchrocheck element in the G650.
Table 5–81: 25 ELEMENT SETTINGS
Settings description for element 25:
Function permission (Function):
This setting allows enabling and disabling the synchrocheck element.
Voltage Level determination settings for busbar and line:
This setting group allows determining the voltage levels considered as dead and live for line and busbar voltage.
Dead Bus voltage level (Dead Bus Level):
Voltage level considered as dead bus
Live Bus voltage level (Live Bus Level):
Voltage level considered as live bus
Dead Line voltage level (Dead Line Level):
Voltage level considered as dead line
Live Line voltage level (Live Line Level):
Voltage level considered as live line
Synchrocheck settings (live bus, live line):
G650 relays verify synchronism by establishing and comparing three basic parameters: the difference in module and angle
of voltage phasors, and the frequency slip of a phasor related to the other one. synchrocheck settings include a fourth time
setting, that allows using an anticipative algorithm to issue a closing signal.
Voltage Difference (Max Volt Difference):
Maximum Difference in module between the line and busbar
voltage to allow a closing in the synchrocheck element.
Angle Difference (Max Angle Difference):
Maximum Difference in angle between the line and busbar
voltage to allow a closing in the synchrocheck element.
Frequency Slip (Max Freq Difference):
Maximum difference in frequency (slip) between both voltage
values to be compared in the synchrocheck element.
Breaker Closing time (Time):
Estimated breaker Closing time, used for establishing the
Closing order in a moment that allows the busbar and line
voltages to be in phase.
SETPOINT > CONTROL ELEMENTS > SYNCHROCHECK
SETTING DESCRIPTION NAME DEFAULT
VALUE STEP RANGE
Function permission Function DISABLED N/A [DISABLED – ENABLED]
Dead bus voltage level Dead Bus Level 10.00 0.01 V [0.00 : 500.00]
Live bus voltage level Live Bus Level 50.00 0.01 V [0.00 : 500.00]
Dead line voltage level Dead Line Level 10.00 0.01 V [0.00 : 500.00]
Live line voltage level Live Line Level 50.00 0.01 V [0.00 : 500.00]
Voltage Difference Max Volt Difference 10.00 0.01 V [2.00 : 500.00]
Angle Difference Max Angle Difference 10.0 0.1 Deg [2.0 : 80.0]
Frequency Slip Max Freq Difference 20 10 mHz [10 : 5000]
Breaker Closing time Time 0.50 0.01 s [0.01 : 600.00]
Dead Line – Dead Bus Function permission DL-DB Function DISABLED N/A [DISABLED – ENABLED]
Live Line – Dead Bus Function permission LL-DB Function DISABLED N/A [DISABLED – ENABLED]
Dead Line – Live Bus Function permission DL-LB Function DISABLED N/A [DISABLED – ENABLED]
Snapshot event generation Snapshot Events ENABLED N/A [DISABLED – ENABLED]