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Potencia e Intensidad de Cortocircuito

This document calculates the short-circuit power and current at points A and B in a power system. It provides parameter values for transmission lines, transformers, and generators. It then calculates the equivalent impedances and determines the short-circuit power and current for points A and B. The short-circuit current at point A is 0.967 kA and at point B is 1.618 kA.

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Gabriel Maya Alberdi
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44 views2 pages

Potencia e Intensidad de Cortocircuito

This document calculates the short-circuit power and current at points A and B in a power system. It provides parameter values for transmission lines, transformers, and generators. It then calculates the equivalent impedances and determines the short-circuit power and current for points A and B. The short-circuit current at point A is 0.967 kA and at point B is 1.618 kA.

Uploaded by

Gabriel Maya Alberdi
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Calcula la potencia e intensidad de

cortocircuito en los puntos A y B. Considera


los siguientes valores para cada elemento:

MVA ≔ 1000 kV ⋅ A

URED1 ≔ 20 kV SccRED1 ≔ 500 MVA

URED2 ≔ 20 kV SccRED2 ≔ 350 MVA

εccT1 ≔ 12% Sn1 ≔ 500 MVA

εccT2 ≔ 11% Sn2 ≔ 350 MVA

εccT3 ≔ 14% Sn3 ≔ 425 MVA

U2T1 ≔ 400 kV U2T2 ≔ 230 kV


Ω Ω
zL1 ≔ 0.5 ―― L1 ≔ 60 km zL2 ≔ 0.4 ―― L2 ≔ 50 km
km km

En primer lugar seleccionamos los valores base:

Sb ≔ 3000 MVA Ub1 ≔ URED1 = 20 kV Ub2 ≔ U2T1 = 400 kV Ub3 ≔ U2T2 = 230 kV

A continuación calculamos las impedancias equivalentes de cada elemento:


2 2
URED1 URED2
ZRED1 ≔ ――― = 0.8 Ω ZRED2 ≔ ――― = 1.143 Ω
SccRED1 SccRED2
2 2
URED1 URED2
ZT1 ≔ εccT1 ⋅ ――― = 0.096 Ω ZT2 ≔ εccT2 ⋅ ――― = 0.126 Ω
Sn1 Sn2
2
U2T1
ZT3 ≔ εccT3 ⋅ ―― = 52.706 Ω
Sn3

ZL1 ≔ zL1 ⋅ L1 = 30 Ω ZL2 ≔ zL2 ⋅ L2 = 20 Ω

Hallamos los valores p.u. correspondientes:

Sb Sb
Z'RED1 ≔ ZRED1 ⋅ ――= 6 Z'RED2 ≔ ZRED2 ⋅ ――= 8.571
2 2
Ub1 Ub1
Sb Sb
Z'T1 ≔ ZT1 ⋅ ―― = 0.72 Z'T2 ≔ ZT2 ⋅ ―― = 0.943
2 2
Ub1 Ub1
Sb
Z'T3 ≔ ZT3 ⋅ ――= 0.988
2
Ub2
Sb Sb
Z'L1 ≔ ZL1 ⋅ ―― = 0.563 Z'L2 ≔ ZL2 ⋅ ―― = 1.134
2 2
Ub2 Ub3

Cortocircuito en A

1 Sb
Z'eq ≔ ――――――――――――――― = 4.479 Scc ≔ ―― = 669.751 MVA
1 1 Z'eq
――――――+ ――――――――
Z'RED1 + Z'T1 + Z'L1 Z'RED2 + Z'T2 + Z'L2 + Z'T3
Scc
Icc ≔ ―――― = 0.967 kA
‾‾
3 ⋅ U2T1

Cortocircuito en B

1 Sb
Z'eq ≔ ――――――――――――――― = 4.655 Scc ≔ ―― = 644.454 MVA
1 1 Z'eq
――――――――+ ――――――
Z'RED1 + Z'T1 + Z'L1 + Z'T3 Z'RED2 + Z'T2 + Z'L2
Scc
Icc ≔ ―――― = 1.618 kA
‾‾
3 ⋅ U2T2

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