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TAKING INTO ACCOUNT THE INFLUENCE OF THE PARAMETERS OF THE DOUBLE CIRCUIT TRANSMISSION LINE WITH SYMMETRICAL SHORT-CIRCUIT FOR CORRECTION OF SETTINGS OF RELAY PROTECTION
Nazarov A.V.
student
Kazan State Power Engineering University
Russia, Kazan
Academic Advisor: Galeeva R.U.
head teacher
Kazan State Power Engineering University
Russia, Kazan
Abstract. When calculating the control action of anti-emergency automatics, the choice of settings of relay protection, as well as operational maintenance and adjustment of current modes of power systems consider the impact of parallel circuits of a double circuit power line. The article is devoted to accounting for the interaction of double-circuit overhead line when calculating short-circuit currents.
Key words: double circuit power line, mutual induction, the method of phase coordinates
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d () | A | B | C | a | b | c |
A | - | dAB | dAC | dAa | dAb | dAc |
B | dAB | - | dAC | dAa | dAb | dAc |
C | dAC | dAa | - | dAa | dAb | dAc |
a | dAC | dAa | dAb | - | dAb | dAc |
b | dAB | dAC | dAa | dAb | - | dAc |
c | dAB | dAC | dAa | dAb | dAc | - |
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B | ZBA | ZBB | ZBC | ZBa | ZBb | ZBc | |||
C | ZCA | ZCB | ZCC | ZCa | ZCb | ZCc | |||
II | a | ZaA | ZaB | ZaC | Zaa | Zab | Zac | ||
b | ZbA | ZbB | ZbC | Zba | Zbb | Zbc | |||
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d () | A | B | C | a | b | c |
A | - | 8,04 | 14,02 | 7,00 | 12,42 | 15,98 |
B | 8,04 | - | 6,86 | 12,42 | 12,80 | 12,43 |
C | 14,02 | 6,86 | - | 15,98 | 12,43 | 8,40 |
a | 7,00 | 12,42 | 15,98 | - | 8,04 | 14,02 |
b | 12,42 | 12,80 | 12,43 | 8,04 | - | 6,86 |
c | 15,98 | 12,43 | 8,40 | 14,02 | 6,86 | - |
. 4.
X(/) | A | B | C | a | b | c |
A | 0,7167 | 0,3037 | 0,2687 | 0,3125 | 0,2764 | 0,2605 |
B | 0,3037 | 0,7167 | 0,3137 | 0,2764 | 0,2745 | 0,2763 |
C | 0,2687 | 0,3137 | 0,7167 | 0,2605 | 0,2763 | 0,3010 |
a | 0,3125 | 0,2764 | 0,2605 | 0,7167 | 0,3037 | 0,2687 |
b | 0,2764 | 0,2745 | 0,2763 | 0,3037 | 0,7167 | 0,3137 |
c | 0,2605 | 0,2763 | 0,3010 | 0,2687 | 0,3137 | 0,7167 |
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R(/) | A | B | C | a | b | c |
A | 0,1458 | 0,05 | 0,05 | 0,05 | 0,05 | 0,05 |
B | 0,05 | 0,1458 | 0,05 | 0,05 | 0,05 | 0,05 |
C | 0,05 | 0,05 | 0,1458 | 0,05 | 0,05 | 0,05 |
a | 0,05 | 0,05 | 0,05 | 0,1458 | 0,05 | 0,05 |
b | 0,05 | 0,05 | 0,05 | 0,05 | 0,1458 | 0,05 |
c | 0,05 | 0,05 | 0,05 | 0,05 | 0,05 | 0,1458 |
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I (3) . () | ∆I () | δI (%) | ||
1 | IA= IB= IC | 11,4 | 1,39 | 13,89 |
2 | IA= IB= IC | 11,15 | 1,14 | 11,39 |
3 | IA= | 10,01 | 0 | 0 |
IB= | 11,94 | 1,93 | 19,28 | |
IC= | 10,85 | 0,84 | 8,39 |
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