Alstom MiCOM P54 Series, Техническое руководство

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P54x/EN AP/La4 Application Notes
(AP) 6-6
MiCOM P543, P544, P545 & P546
AP
6.7.10 Calculation of total impedance till Zone1 reach point 86
6.7.11 Calculation of X/R till Zone1 reach point 86
6.7.12 Calculation of fault current till Zone1 reach point 86
6.7.13 CT Vk for Current differential protection 87
6.7.14 CT Vk for distance Zone1 reach point 87
6.7.15 CT Vk for distance Zone1 close-up fault 87
6.7.16 CT Vk for distance time delayed zones 87
6.7.17 Vk to be considered 87
7. HIGH BREAK OUTPUT CONTACTS 88
8. AUXILIARY SUPPLY FUSE RATING 88
FIGURES
Figure 1 Breaker and a half switched substation 13
Figure 2 Settings required to apply a Mho zone (Distance option only) 15
Figure 3 Settings required to apply a quadrilateral zone (Distance option only) 16
Figure 4 Example of high resistive zone 1 fault that falls outside zone 1 characteristic when the starting
tilt angle of -3° is set (over-tilting effect). (Distance option only) 18
Figure 5 Basic time stepped distance scheme (Distance option only) 23
Figure 6 Power transfer in relation to angle difference θ between 2 ends 25
Figure 7 Setting determination for the positive sequence resistive component R5 (Distance option only)27
Figure 8 R6
MAX
determination (Distance option only) 28
Figure 9 Example of timer reset due to MOV’s operation 31
Figure 10 Positioning of core balance current transformers 39
Figure 11 Calculated ferranti voltage rise on 345 kV and 765 kV lines 41
Figure 12 Residual voltage, solidly earthed system 42
Figure 13 Residual voltage, resistance earthed system 43
Figure 14 Typical plain feeder circuit 49
Figure 15 Typical transformer feeder circuit 50
Figure 16 Typical teed feeder application 51
Figure 17 Three winding transformer in zone application 53
Figure 18 System assumed for worked example 55
Figure 19 Teed feeder application - apparent impedances seen by RELAY 60
Figure 20 Teed feeder applications 61
Figure 21 TCS scheme 1 63
Figure 22 PSL for TCS schemes 1 and 3 64
Figure 23 TCS scheme 2 64
Figure 24 PSL for TCS scheme 2 65
Figure 25 TCS scheme 3 65
Figure 26 I nterMiCOM
64
mapping in a three ended application 67
Figure 27 Two circuit breaker auto-reclose application 77