5-140
D30 Line Distance Protection System
GE Multilin
5.6 GROUPED ELEMENTS
5 SETTINGS
5
Figure 5–65: GROUND DISTANCE ZONE 1 TO ZONE 3 SCHEME LOGIC
GROUND DIRECTIONAL SUPERVISION:
A dual (zero-sequence and negative-sequence) memory-polarized directional supervision applied to the ground distance
protection elements has been shown to give good directional integrity. However, a reverse double-line-to-ground fault can
lead to a maloperation of the ground element in a sound phase if the zone reach setting is increased to cover high resis-
tance faults.
Ground distance zones 2 and higher use an additional ground directional supervision to enhance directional integrity. The
element’s directional characteristic angle is used as a
maximum torque angle
together with a 90° limit angle.
The supervision is biased toward operation in order to avoid compromising the sensitivity of ground distance elements at
low signal levels. Otherwise, the reverse fault condition that generates concern will have high polarizing levels so that a cor-
rect reverse fault decision can be reliably made.
Figure 5–66: GROUND DIRECTIONAL SUPERVISION SCHEME LOGIC
$&'5
$1'
$1'
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25
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$1'
25
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581
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581
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581
&(/(0(17
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*1'',67=121+20*(1$1*
*1'',67=&203/,0,7
*1'',67=',55&$
*1'',67
',5&203/,0,7
=
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*1'',67=48$'5*7%/'5&$
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7,0(5
F\FOH
F\FOH
6(77,1*
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)/(;/2*,&23(5$1'6
*1'',67=3.3$
*1'',67='32$
)/(;/2*,&23(5$1'6
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=
',67
3.3%
*1'',67='32%
)/(;/2*,&23(5$1'6
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=
',67
3.3&
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)/(;/2*,&23(5$1'
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3.3
*1'',67=6831,1
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,1
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*1'',67=5(95($&+5&$
*1'',67=5($&+
*1'',67=5&$
*1'',67==20=0$*
*1'',67===$1*
*1'',67===0$*
*1'',67=6+$3(
*1'',67=',5
V_0 > 5 volts
RUN
Zero-sequence
directional characteristic
837009A7.CDR
AND
OR
Co-ordinating time:
pickup = 1.0 cycle, reset = 1.0 cycle
SETTING
= V_0
= I_0
Distance Source
FLEXLOGIC OPERAND
OPEN POLE OP
TIMER
t
pickup
t
reset
FLEXLOGIC OPERAND
GND DIST Z2 DIR SUPN
Summary of Contents for D30D00HCHF8AH6AM6BP8BX7A
Page 10: ...x D30 Line Distance Protection System GE Multilin TABLE OF CONTENTS...
Page 374: ...5 248 D30 Line Distance Protection System GE Multilin 5 10 TESTING 5 SETTINGS 5...
Page 398: ...6 24 D30 Line Distance Protection System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6...
Page 410: ...7 12 D30 Line Distance Protection System GE Multilin 7 2 TARGETS 7 COMMANDS AND TARGETS 7...
Page 444: ...9 24 D30 Line Distance Protection System GE Multilin 9 5 FAULT LOCATOR 9 THEORY OF OPERATION 9...
Page 576: ...B 102 D30 Line Distance Protection System GE Multilin B 4 MEMORY MAPPING APPENDIX B B...
Page 616: ...D 10 D30 Line Distance Protection System GE Multilin D 1 IEC 60870 5 104 PROTOCOL APPENDIX D D...
Page 628: ...E 12 D30 Line Distance Protection System GE Multilin E 2 DNP POINT LISTS APPENDIX E E...
Page 636: ...F 8 D30 Line Distance Protection System GE Multilin F 3 WARRANTY APPENDIX F F...
Page 646: ...x D30 Line Distance Protection System GE Multilin INDEX...
