5-182
G30 Generator Protection System
GE Multilin
5.6 GROUPED ELEMENTS
5 SETTINGS
5
EXAMPLE 5: INTERNAL LOW-CURRENT, HIGH-LOAD SINGLE-LINE-TO-GROUND FAULT WITH NO FEED FROM
THE GROUND
Given the following inputs: IA = 1.10 pu
∠
0°, IB = 1.0 pu
∠
–120°, IC = 1.0 pu
∠
120°, and IG = 0.0 pu
∠
0°
The relay calculates the following values:
I_0 = 0.033 pu
∠
0°, I_2 = 0.033 pu
∠
0°, and I_1 = 1.033 pu
∠
0°
Igd = abs(3
×
0.0333 + 0.0) = 0.10 pu, IR0 = abs(3
×
0.033 – (0.0)) = 0.10 pu, IR2 = 3
×
0.033 = 0.10 pu,
IR1 = 1.033 / 8 = 0.1292 pu, and Igr = 0.1292 pu
Despite very low fault current level the differential current is above 75% of the restraining current.
EXAMPLE 6: INTERNAL HIGH-CURRENT SINGLE-LINE-TO-GROUND FAULT WITH NO FEED FROM THE GROUND
Given the following inputs: IA = 10 pu
∠
0°, IB = 0 pu, IC = 0 pu, and IG = 0 pu
The relay calculates the following values:
I_0 = 3.3 pu
∠
0°, I_2 = 3.3 pu
∠
0°, and I_1 = 3.3 pu
∠
0°
Igd = abs(3
×
3.3 + 0.0) = 10 pu, IR0 = abs(3
×
3.3 – (0.0)) = 10 pu, IR2 = 3
×
3.3 = 10 pu, IR1 = 3
×
(3.33 – 3.33) = 0
pu, and Igr = 10 pu
The differential current is 100% of the restraining current.
5.6.7 NEGATIVE SEQUENCE CURRENT
a) NEGATIVE SEQUENCE DIRECTIONAL OVERCURRENT
(ANSI 67Q, IEC PDEF/PTOC)
PATH: SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
NEGATIVE SEQUENCE CURRENT
NEG SEQ DIR OC1(2)
NEG SEQ DIR OC1
NEG SEQ DIR OC1
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
NEG SEQ DIR OC1
SOURCE: SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4
MESSAGE
NEG SEQ DIR OC1
OFFSET: 0.00
Ω
Range: 0.00 to 250.00 ohms in steps of 0.01
MESSAGE
NEG SEQ DIR OC1
TYPE: Neg Sequence
Range: Neg Sequence, Zero Sequence
MESSAGE
NEG SEQ DIR OC1 POS-
SEQ RESTRAINT: 0.063
Range: 0.000 to 0.500 in steps of 0.001
MESSAGE
NEG SEQ DIR OC1 FWD
ECA: 75° Lag
Range: 0 to 90° Lag in steps of 1
MESSAGE
NEG SEQ DIR OC1 FWD
LIMIT ANGLE: 90°
Range: 40 to 90° in steps of 1
MESSAGE
NEG SEQ DIR OC1 FWD
PICKUP: 0.050
pu
Range: 0.015 to 30.000 pu in steps of 0.001
MESSAGE
NEG SEQ DIR OC1 REV
LIMIT ANGLE: 90°
Range: 40 to 90° in steps of 1
MESSAGE
NEG SEQ DIR OC1 REV
PICKUP: 0.050
pu
Range: 0.015 to 30.000 pu in steps of 0.001
MESSAGE
NEG SEQ DIR OC1 BLK:
Off
Range: FlexLogic operand
MESSAGE
NEG SEQ DIR OC1
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
Содержание G30
Страница 10: ...x G30 Generator Protection System GE Multilin TABLE OF CONTENTS ...
Страница 30: ...1 20 G30 Generator Protection System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Страница 414: ...5 274 G30 Generator Protection System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Страница 456: ...8 2 G30 Generator Protection System GE Multilin 8 1 DIRECTIONAL PRINCIPLE 8 THEORY OF OPERATION 8 ...
Страница 470: ...9 14 G30 Generator Protection System GE Multilin 9 1 SETTING EXAMPLE 9 APPLICATION OF SETTINGS 9 ...
Страница 484: ...11 12 G30 Generator Protection System GE Multilin 11 6 DISPOSAL 11 MAINTENANCE 11 ...
Страница 512: ...A 28 G30 Generator Protection System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Страница 620: ...B 108 G30 Generator Protection System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Страница 666: ...E 10 G30 Generator Protection System GE Multilin E 1 IEC 60870 5 104 APPENDIX E E ...
Страница 678: ...F 12 G30 Generator Protection System GE Multilin F 2 DNP POINT LISTS APPENDIX F F ...
Страница 687: ...GE Multilin G30 Generator Protection System H 7 APPENDIX H H 2 ABBREVIATIONS H Z Impedance Zone ...