13.8
Direct transfer trip logic
13.8.1
Introduction
Direct transfer trip (DTT) logic is used together with Line distance protection function
or other type of line protection. One typical example for use of transfer trip is given
below. When Line distance protection function is extended to cover power lines
feeding the transformer directly and there is a fault in transformer differential area, the
transformer differential protection operates faster than line protection. A trip command
is sent to the remote end of the line. On remote end, before sending a trip command to
the circuit breaker, the certainty of a fault condition is ensured by checking local
criterion in DTT logic.
~
I
DIFF
>
Load
DTT
CS
CR
TRIP
TRIP
VT1
CT3
CT2
CT1
Power
Transformer
Line
X
source
Source
en03000120.vsd
IEC03000120 V1 EN
Figure 413:
Direct transfer trip
On receiving the CR signal from remote end, Direct transfer trip logic needs to check
additional local criterion, before sending the trip signal to circuit breaker.
DTT logic can be handled in the following separate application functions:
1. Low active power and power factor protection LAPPGAPC (37_55)
2. Sudden change in current variation SCCVPTOC (51)
3. Compensated over and undervoltage protection COUVGAPC (59_27)
4. Carrier receive logic LCCRPTRC (94)
5. Zero sequence overvoltage protection LCZSPTOV (59N)
6. Negative sequence overvoltage protection LCNSPTOV (47)
7. Zero sequence overcurrent protection LCZSPTOC (51N)
8. Negative sequence overcurrent protection LCNSPTOC (46)
9. Three-phase overcurrent LCP3PTOC (51)
10. Three-phase undercurrent LCP3PTUC (37)
A composite scheme of these functions must be configured in PCM600 configuration
tool, to make a complete DTT scheme as shown in Figure
Section 13
1MRK505222-UUS C
Scheme communication
828
Technical reference manual
Содержание Relion 670 series
Страница 1: ...Relion 670 series Line differential protection RED670 ANSI Technical reference manual...
Страница 2: ......
Страница 40: ...34...
Страница 50: ...44...
Страница 60: ...54...
Страница 126: ...120...
Страница 384: ...378...
Страница 496: ...490...
Страница 556: ...550...
Страница 602: ...596...
Страница 620: ...614...
Страница 794: ...788...
Страница 864: ...858...
Страница 988: ...982...
Страница 998: ...992...
Страница 1084: ...1078...
Страница 1164: ...1158...
Страница 1168: ...1162...
Страница 1170: ...1MRK002802 AB 1 670 1 2 PG ANSI V1 EN Section 21 1MRK505222 UUS C Connection diagrams 1164 Technical reference manual...
Страница 1171: ...1MRK002802 AB 2 670 1 2 PG ANSI V1 EN 1MRK505222 UUS C Section 21 Connection diagrams 1165 Technical reference manual...
Страница 1172: ...1MRK002802 AB 3 670 1 2 PG ANSI V1 EN Section 21 1MRK505222 UUS C Connection diagrams 1166 Technical reference manual...
Страница 1173: ...1MRK002802 AB 4 670 1 2 PG ANSI V1 EN 1MRK505222 UUS C Section 21 Connection diagrams 1167 Technical reference manual...
Страница 1174: ...1MRK002802 AB 5 670 1 2 ANSI V1 EN Section 21 1MRK505222 UUS C Connection diagrams 1168 Technical reference manual...
Страница 1175: ...1MRK002802 AB 6 670 1 2 ANSI V1 EN 1MRK505222 UUS C Section 21 Connection diagrams 1169 Technical reference manual...
Страница 1176: ...1MRK002802 AB 7 670 1 2 ANSI V1 EN Section 21 1MRK505222 UUS C Connection diagrams 1170 Technical reference manual...
Страница 1177: ...1MRK002802 AB 8 670 1 2 ANSI V1 EN 1MRK505222 UUS C Section 21 Connection diagrams 1171 Technical reference manual...
Страница 1178: ...1MRK002802 AB 9 670 1 2 ANSI V1 EN Section 21 1MRK505222 UUS C Connection diagrams 1172 Technical reference manual...
Страница 1179: ...1MRK002802 AB 10 670 1 2 ANSI V1 EN 1MRK505222 UUS C Section 21 Connection diagrams 1173 Technical reference manual...
Страница 1180: ...1MRK002802 AB 11 670 1 2 ANSI V1 EN Section 21 1MRK505222 UUS C Connection diagrams 1174 Technical reference manual...
Страница 1181: ...1MRK002802 AB 12 670 1 2 ANSI V1 EN 1MRK505222 UUS C Section 21 Connection diagrams 1175 Technical reference manual...
Страница 1182: ...1MRK002802 AB 13 670 1 2 ANSI V1 EN Section 21 1MRK505222 UUS C Connection diagrams 1176 Technical reference manual...
Страница 1183: ...1MRK002802 AB 14 670 1 2 ANSI V1 EN 1MRK505222 UUS C Section 21 Connection diagrams 1177 Technical reference manual...
Страница 1184: ...1MRK002802 AB 15 670 1 2 ANSI V1 EN Section 21 1MRK505222 UUS C Connection diagrams 1178 Technical reference manual...
Страница 1220: ...1214...
Страница 1230: ...1224...
Страница 1231: ...1225...