⎯
39
⎯
6 F 2 S 0 8 4 6
VaX: imaginary part of phase “a” voltage
VaR: real part of phase “a” voltage
IaX: imaginary part of phase “a” current
IaR: real part of phase “a” current
I0X: imaginary part of zero-sequence current of the protected line
I0R: real part of zero-sequence current of the protected line
IomX: imaginary part of zero-sequence current of the parallel line
IomR: real part of zero-sequence current of the parallel line
Figure 2.4.1.14 Earth Fault Compensation
The zero-sequence compensation factors are applied to the earth fault measuring elements as
shown in the table below
Element Protected
line Parallel line
Z1G
Krs, Kxs
Krm, Kxm
Z1XG
Krs, Kxs
Krm, Kxm
Z2G
Krs, Kxs
Krm, Kxm
Z3G
−
−
ZFG
−
−
ZR1G KrsR,
KxsR
−
ZR2G
−
−
Z4G
−
−
ZNDG
−
−
−
: Compensation is not provided.
Note: The operation of Z1 or Z2 element is limited within the Z3 operating zone if the reach
of Z1 or Z2 compensated with zero-sequence current exceeds the reach of Z3. The
operation of ZR1G is also limited within the reach of ZR2G.
The zero-sequence compensation of the parallel line is controlled by the ZPCC (Zero-sequence
Current Compensation) element.
When an earth fault occurs on the protected line, the ZPCC operates and parallel line
compensation is performed to prevent underreach caused by the mutual zero-sequence current of
the parallel line.
When an earth fault on the parallel line occurs, the ZPCC does not operate and the compensation
of parallel line is not performed to prevent overreach. The operating condition of the ZPCC is as
follows:
3I0 / 3Iom
≥
0.8
Charging current compensation
When distance protection is applied to underground cables or long-distance overhead lines, the
I0’
I1, I2, Io
Z1, Z2, Zo
Zom
P
F
Va
Содержание GRZ100 B Series
Страница 264: ... 263 6 F 2 S 0 8 4 6 Appendix A Block Diagram ...
Страница 271: ... 270 6 F 2 S 0 8 4 6 ...
Страница 272: ... 271 6 F 2 S 0 8 4 6 Appendix B Signal List ...
Страница 307: ... 306 6 F 2 S 0 8 4 6 ...
Страница 308: ... 307 6 F 2 S 0 8 4 6 Appendix C Variable Timer List ...
Страница 310: ... 309 6 F 2 S 0 8 4 6 Appendix D Binary Input Output Default Setting List ...
Страница 321: ... 320 6 F 2 S 0 8 4 6 ...
Страница 322: ... 321 6 F 2 S 0 8 4 6 Appendix E Details of Relay Menu and LCD Button Operation ...
Страница 331: ... 330 6 F 2 S 0 8 4 6 ...
Страница 340: ... 339 6 F 2 S 0 8 4 6 Appendix G Typical External Connections ...
Страница 377: ... 376 6 F 2 S 0 8 4 6 ...
Страница 384: ... 383 6 F 2 S 0 8 4 6 Appendix J Return Repair Form ...
Страница 388: ... 387 6 F 2 S 0 8 4 6 Customer Name Company Name Address Telephone No Facsimile No Signature ...
Страница 389: ... 388 6 F 2 S 0 8 4 6 ...
Страница 390: ... 389 6 F 2 S 0 8 4 6 Appendix K Technical Data ...
Страница 401: ... 400 6 F 2 S 0 8 4 6 ...
Страница 402: ... 401 6 F 2 S 0 8 4 6 Appendix L Symbols Used in Scheme Logic ...
Страница 405: ... 404 6 F 2 S 0 8 4 6 ...
Страница 406: ... 405 6 F 2 S 0 8 4 6 Appendix M Example of Setting Calculation ...
Страница 417: ... 416 6 F 2 S 0 8 4 6 ...
Страница 418: ... 417 6 F 2 S 0 8 4 6 Appendix N IEC60870 5 103 Interoperability and Troubleshooting ...
Страница 430: ... 429 6 F 2 S 0 8 4 6 Appendix O Programmable Reset Characteristics and Implementation of Thermal Model to IEC60255 8 ...
Страница 434: ... 433 6 F 2 S 0 8 4 6 Appendix P Inverse Time Characteristics ...
Страница 437: ... 436 6 F 2 S 0 8 4 6 ...
Страница 438: ... 437 6 F 2 S 0 8 4 6 Appendix Q Failed Module Tracing and Replacement ...
Страница 444: ... 443 6 F 2 S 0 8 4 6 Appendix R Ordering ...
Страница 447: ......