rfe-1-bat-ece-ido-001-reva cálculos. transformador principal.pdf
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PLANTA DE RESERVA FRÍA DE GENERACIÓN DE ETEN S.A
PROYECTO PROJECT
RESERVA FRÍA ETEN CONTRATISTA CONTRACTOR
TÍTULO TITLE
CÁLCULOS. TRANSFORMADOR PRINCIPAL
Nº DE DOCUMENTO PROYECTO PROJECT DOCUMENT Nº
RFE-1-BAT-ECE-IDO-001
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CONTROL DE MODIFICACIONES/CHANGE LOG
Revisión
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A 09/05/2014
EDICIÓN INICIAL
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ÍNDICE
1. OBJETO ............................................................................................................................. 4
2. REFERENCIAS ................................................................................................................... 5
3. DATOS DE PARTIDA ......................................................................................................... 6
3.1. RED DE 220 KV .................................................................................................... 6
3.2. LÍNEA DE TRANSMISIÓN ..................................................................................... 6
3.3. TRANSFORMADOR PRINCIPAL .......................................................................... 6
3.4. GENERADORES ................................................................................................... 7
3.5. BARRAS DE FASE AISLADA ................................................................................ 7
3.6. SERVICIOS AUXILIARES ..................................................................................... 8
4. DIMENSIONAMIENTO DEL TRANSFORMADOR PRINCIPAL .......................................... 9
4.1. POTENCIA NOMINAL ........................................................................................... 9
4.2. IMPEDANCIA DE CORTOCIRCUITO .................................................................. 10
4.3. ESTUDIO DE TENSIÓN-REACTIVA ................................................................... 11
4.3.1. Resultados Caso 1 ................................................................................. 11
4.3.2. Resultados Caso 2 ................................................................................. 14
5. CONCLUSIONES .............................................................................................................. 17
6. ANEXOS ........................................................................................................................... 18
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1. OBJETO
El objeto del presente documento es establecer las características técnicas del
TRANSFORMADOR PRINCIPAL a instalar en la Planta de Reserva Fría de Eten (Perú).
El estudio se ha realizado con el programa de diseño, análisis y simulación de sistemas
eléctricos ETAP Powerstation, de Operation Technology, Inc., versión 12.0.0C.
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2. REFERENCIAS
[1] ISA-REP: PE-REQU-ANTE-2011-D230 “Anteproyecto de Ingeniería Subestación Reque
220 kV y obras conexas”
[2] Email RFE-CPI-GE-EML-0070. de 2012-12-13 con datos de la red 220 kV.
[3] General Electric 401A6263 “GE LOAD SUMMARY”
[4] General Electric 105T6742 “ONE LINE DIAGRAM GAS TURBINE”
[5] RFE-1-YE_-ELC-IDO-001 “Lista de Consumidores Electricos”
[6] Doc. RFE-1-YE__-ECE-IDO-001 “CÁLCULOS ELÉCTRICOS”
[7] Código Nacional de Electricidad (Suministro 2011). Ministerio de Energía y Minas. Perú.
[8] ESTUDIO DE PRE OPERATIVIDAD DE LA PLANTA DE RESERVA FRÍA DE GENERACIÓN
DE ETEN
[9] Características técnicas y de operación de la Planta Etén. Ministerio de Economía y Finanzas.
Perú.
[10] RFE-1-MKA-EIP-WRT-001-REV0 Generator Technical Specification
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3. DATOS DE PARTIDA
En el anexo I se incluye el esquema simplificado empleado para la simulación. En él se han
incluido los elementos descritos a continuación.
3.1. RED DE 220 kV
Se considera la red de 220 kV definida por los siguientes valores:
Tensión nominal ............................................................................................................ 220 kV
Variación de tensión .................................................................................................... ±5% Un
Frecuencia nominal ......................................................................................................... 60 Hz
Intensidad de cortocircuito trifásica ................................................................................. 9,3 kA
Intensidad de cortocircuito monofásica ......................................................................... 10,5 kA
3.2. LÍNEA DE TRANSMISIÓN
Se considera la línea de transmisión aérea desde la planta ‘Reserva Fría Eten’ hasta S.E.
Reque, situada a 2,92 km mediante cable ‘Narcissus’ (1272 MCM).
3.3. TRANSFORMADOR PRINCIPAL
Los parámetros principales del transformador principal son los siguientes:
Potencia nominal (estimada) .............................................................................. 225 / 300 MVA
Refrigeración ..................................................................................................... ONAN / ONAF
Relación de transformación .................................................................................... 220 / 18 kV
Regulación: ............................................................................................. en carga, ± 10 x 1,5%
Tensión de cortocircuito ................................................................................... 10% (225 MVA)
Grupo de conexión .......................................................................................................... YNd1
Neutro a tierra .................................................................................................. Conexión sólida
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3.4. GENERADORES
Los datos y curvas considerados para el generador de la turbina principal se han incluido en el
anexo II:
Generador Principal
Tensión nominal .............................................................................................................. 18 kV
Variación de tensión ................................................................................................ ±5% % Un
Potencia aparente nominal ...................................................................................... 279,5 MVA
Potencia activa nominal ............................................................................................ 223,6 MW
Factor de potencia ........................................................................................................ 0,8 p.u.
Capacidad de potencia reactiva con cos φ =0,80 inductivo ....................................... 167 MVAr
Capacidad de potencia reactiva con cos φ =0,95 capacitivo ...................................... -86 MVAr
Reactancia subtransitoria saturada ............................................................................. 0,17 p.u.
Neutro a tierra .......................................................................... Mediante trafo-resist. (10Aprim)
Los datos del generador auxiliar se muestran a continuación:
Generador Auxiliar (Black Start)
Tensión nominal ........................................................................................................... 6.600 V
Potencia aparente nominal .................................................................................... 10,549 MVA
Potencia activa nominal .............................................................................................. 8,44 MW
Factor de potencia ...................................................................................................... 0,80 p.u.
Capacidad de potencia reactiva con cos φ =0,80 inductivo .......................................6,33 MVAr
Capacidad de potencia reactiva con cos φ =0,95 capacitivo ................................... -3,29 MVAr
Reactancia subtransitoria saturada ............................................................................. 0,16 p.u.
Neutro a tierra Mediante resist. de 762Ω (5A)
3.5. BARRAS DE FASE AISLADA
Tensión nominal .............................................................................................................. 18 kV
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Tramo Generador-Interruptor de Generador:
o Corriente nonimal ................................................................................................... 1000 A
o Longitud .................................................................................................................... 35 m
Tramo Interruptor de Generador-Transformador Principal:
o Corriente nonimal ................................................................................................... 1000 A
o Longitud .................................................................................................................... 35 m
Tramo Interruptor de Generador-Transformador Auxiliar:
o Corriente nonimal ..................................................................................................... 400 A
o Longitud ...................................................................................................................... 8 m
Material conductor ................................................................................................................ Cu
3.6. SERVICIOS AUXILIARES
Los consumos de los servicios auxiliares de la planta se estiman en:
Potencia activa ................................................................................................................ 4 MW
Potencia reactiva .......................................................................................................... 3 MVAr
Factor de potencia ........................................................................................................ 0,8 p.u.
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4. DIMENSIONAMIENTO DEL TRANSFORMADOR PRINCIPAL
4.1. POTENCIA NOMINAL
Para realizar el cálculo, se precisa estudiar la situación más desfavorable de trabajo en la que se
encontrará el Transformador Principal, por ello, la situación analizada es la siguiente:
Máxima generación de potencia exportada a red:
Generador Pincipal operando a plena carga con FP 0,8 inductivo.
Generador Auxiliar (Black Start) operando a plena carga con FP 0,8 inductivo
Mínimos Servicios Auxiliares de la planta en operación para conseguir plena carga en
Turbina.
Por ello, la potencia generada desde los servicios auxiliares (desde el Black Start) se estima en:
Potencia activa (generada desde auxiliares) .................................................................... 4 MW
Potencia reactiva (generada desde auxiliares) ..........................................................3,33 MVAr
Factor de potencia ...................................................................................................... 0,37 p.u.
Se ha seguido el siguiente diagrama para el dimensionamiento de la potencia nominal del
Transformador Principal:
Donde, teniendo en cuenta los datos del proyecto y estimados en la sección 3 se obtiene:
Ug = 18 kV
P1 = 223,6 MW
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Q1 = 167 MVAr
P2 = (-4) MW *De acuerdo al sentido definido en el diagrama.
Q2 = (-3,33) MVAr *De acuerdo al sentido definido en el diagrama.
P3 = P1-P2 = 223,6 – (-4) = 227,6 MW
Q3 = Q1-Q2 = 167 –(-3,33) = 170,33 MVAr
S3 = √(P3^2+Q3^2) = 284,3 MVA < 300 MVA
U1 / U2 = 18 / 220 kV
P4, Q4 = Pérdidas en el transformador. Calculadas a partir de la siguiente estimación:
(
)
( )
|
| ( )
o = 99,7%
o
o P4 = 0,683 MW
o Q4 = 35.92 MVAr
P5 = P3-P4 = 227,6-0.683 = 226,9 MW
Q5 = Q3-Q4 = 170,33-35.92= 134.4 MVAr
S5 = √(P5^2+Q5^2) = 263,7 MVA < 300 MVA
Por lo que para el caso más desfavorable, se considera válida la potencia del Transformador
Principal de 225 /300 MVA (ONAN/ONAF).
4.2. IMPEDANCIA DE CORTOCIRCUITO
En los siguientes apartados y para una impedancia de cortocircuito del 10% (225 MVA) en el
Transformador Principal, se comprueba que las variaciones de tensión en el embarrado de
generación se encuentran dentro del rango admisible del ± 10%.
Ver documento de Cálculos Eléctricos [6].
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4.3. ESTUDIO DE TENSIÓN-REACTIVA
El estudio de tensión-reactiva muestra la capacidad reactiva de la planta frente a las variaciones
de tensión de la red para cada una de las tomas del regulador de tensión del Transformador
Principal, verificando así que para todo el rango de tensiones posibles de la red, la planta estará
trabajando dentro de los límites establecidos en cada sistema (Generador, Barras de Fase
Aislada, Transformador Auxiliar…).
Los casos estudiados son los siguientes:
CASO CONDICIONES DE OPERACIÓN
1
- Tensión de red operando en el rango de 220±5% kV (209 ÷231 kV)
- Generador Principal operando a plena carga con FP 0,8 inductivo.
- Generador Auxiliar operando a plena carga con FP 0,8 inductivo.
2
- Tensión de red operando en el rango de 220±5% kV (209 ÷231 kV)
- Generador Principal operando a plena carga con FP 0,95 capacitivo.
- Generador Auxiliar operando a plena carga con FP 0,95 capacitivo.
Nota: Los valores marcados en verde en los resultado marcan los valores de operación que se
encuentran fuera de los límites establecidos en bornas del Generador Principal (variación de
tensión de ±5% Un acorde a [8]).
4.3.1. Resultados Caso 1
En la siguientes tablas se dan los resultados de las simulaciones con el programa ETAP en
función de la tensión de la red 220 kV y de la posición del cambiador de tomas.
En la primera tabla se dan los valores de la tensión en la barra del generador en tanto por ciento.
TAP %
TOMA Tensión de la red de 220 kV
209 214,5 220 225,5 231
15 10 - - 95,44 97,47 99,50
13,5 9 - 94,47 96,52 98,58 100,64
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TAP %
TOMA Tensión de la red de 220 kV
209 214,5 220 225,5 231
12 8 - 95,55 97,64 99,72 101,82
10,5 7 94,55 96,66 98,78 100,90 103,02
9 6 95,67 97,81 99,96 102,10 104,26
7,5 5 96,81 98,99 101,17 103,35 105,53
6 4 97,99 100,20 102,41 104,63 -
4,5 3 99,21 101,45 103,69 105,94 -
3 2 100,46 102,74 105,02 - -
1,5 1 101,75 104,06 - - -
0 0 103,08 105,43 - - -
-1,5 -1 104,45 - - - -
-3 -2 105,87 - - - -
-4,5 -3 - - - - -
-6 -4 - - - - -
-7,5 -5 - - - - -
-9 -6 - - - - -
-10,5 -7 - - - - -
-12 -8 - - - - -
-13,5 -9 - - - - -
-15 -10 - - - - -
En la siguente tabla se representan los valores de la potencia transmitida a la red de 220 kV y el
factor de potencia (inductivo) en bornes del primario del transformador.
TAP %
TOMA
Tensión de la red de 220 kV
209 214,5 220 225,5 231
15 10 - - 260,07 260,98 261,84
- - 87,30 87,00 86,70
13,5 9 - 259,58 260,53 261,42 262,27
- 87,40 87,10 86,80 86,50
12 8 - 260,05 260,98 261,86 262,69
- 87,30 87,00 86,70 86,40
10,5 7 259,54 260,51 261,43 262,29 263,11
87,40 87,10 86,80 86,50 86,30
9 6 260,02 260,97 261,87 262,72 263,53
87,30 87,00 86,70 86,40 86,10
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TAP %
TOMA
Tensión de la red de 220 kV
209 214,5 220 225,5 231
7,5 5 260,50 261,43 262,32 263,15 263,94
87,10 86,80 86,50 86,20 86,00
6 4 260,97 261,89 262,76 263,58 -
87,00 86,60 86,40 86,10 -
4,5 3 261,44 262,35 263,20 264,00 -
86,80 86,50 86,20 85,90 -
3 2 261,91 262,80 263,63 - -
86,60 86,30 86,10 - -
1,5 1 262,37 263,25 - - -
86,50 86,20 - - -
0 0 262,84 263,69 - - -
86,30 86,00 - - -
-1,5 -1 263,30 - - - -
86,20 - - - -
-3 -2 263,75 - - - -
86,00 - - - -
-4,5 -3 - - - - -
- - - - -
-6 -4 - - - - -
- - - - -
-7,5 -5 - - - - -
- - - - -
-9 -6 - - - - -
- - - - -
-10,5 -7 - - - - -
- - - - -
-12 -8 - - - - -
- - - - -
-13,5 -9 - - - - -
- - - - -
-15 -10 - - - - -
- - - - -
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4.3.2. Resultados Caso 2
En la siguientes tablas se dan los resultados de las simulaciones con el programa ETAP en
función de la tensión de la red 220 kV y de la posición del cambiador de tomas.
En la tercera tabla se dan los valores de la tensión en la barra del generador en tanto por ciento.
TAP %
TOMA Tensión de la red de 220 kV
209 214,5 220 225,5 231
15 10 - - - - -
13,5 9 - - - - -
12 8 - - - - -
10,5 7 - - - - -
9 6 - - - - -
7,5 5 - - - - -
6 4 - - - - 94,40
4,5 3 - - - - 95,91
3 2 - - - 94,87 97,46
1,5 1 - - 93,81 96,43 99,05
0 0 - - 95,38 98,04 100,69
-1,5 -1 - 94,28 96,99 99,69 102,37
-3 -2 - 95,91 98,65 101,38 104,10
-4,5 -3 94,79 97,58 100,36 103,12 105,88
-6 -4 96,48 99,30 102,12 104,92 -
-7,5 -5 98,21 101,08 103,93 106,77 -
-9 -6 100,00 102,90 105,79 - -
-10,5 -7 101,84 104,78 - - -
-12 -8 103,74 106,73 - - -
-13,5 -9 105,70 - - - -
-15 -10 - - - - -
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En la siguente tabla se representan los valores de la potencia transmitida a la red de 220 kV y el
factor de potencia (capacitivo) en bornes del primario del transformador.
TAP
% TOMA
Tensión de la red de 220 kV
209 214,5 220 225,5 231
15 10 - - - - -
- - - - -
13,5 9 - - - - -
- - - - -
12 8 - - - - -
- - - - -
10,5 7 - - - - -
- - - - -
9 6 - - - - -
- - - - -
7,5 5 - - - - -
- - - - -
6 4 - - - - 253,20
- - - - -89,80
4,5 3 - - - - 252,77
- - - - -89,90
3 2 - - - 253,10 252,34
- - - -89,80 -90,10
1,5 1 - - 253,46 252,66 251,93
- - -89,70 -89,90 -90,20
0 0 - - 253,00 252,23 251,53
- - -89,80 -90,10 -90,30
-1,5 -1 - 253,36 252,55 251,81 251,14
- -89,70 -90,00 -90,20 -90,50
-3 -2 - 252,89 252,11 251,40 250,75
- -89,90 -90,10 -90,40 -90,60
-4,5 -3 253,25 252,43 251,68 251,00 250,38
-89,70 -90,00 -90,30 -90,50 -90,70
-6 -4 252,78 251,99 251,27 250,61 -
-89,90 -90,20 -90,40 -90,60 -
-7,5 -5 252,31 251,55 250,86 250,23 -
-90,00 -90,30 -90,50 -90,80 -
-9 -6 251,86 251,13 250,47 - -
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TAP
% TOMA
Tensión de la red de 220 kV
209 214,5 220 225,5 231
-90,20 -90,50 -90,70 - -
-10,5 -7 251,42 250,72 - - -
-90,40 -90,60 - - -
-12 -8 250,99 250,32 - - -
-90,50 -90,70 - - -
-13,5 -9 250,57 - - - -
-90,60 - - - -
-15 -10 - - - - -
- - - - -
CÁLCULOS. TRANSFORMADOR PRINCIPAL
Rev. A
RFE-1-BAT-ECE-IDO-001 Pág/Page 17 de/of 18
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5. CONCLUSIONES
Las características principales finalmente establecidas para el Transformador Principal son las
siguientes:
Potencia nominal ............................................................................................... 225 / 300 MVA
Refrigeración ..................................................................................................... ONAN / ONAF
Relación de transformación .................................................................................... 220 / 18 kV
Regulación: ............................................................................................. en carga, ± 10 x 1,5%
Tensión de cortocircuito ................................................................................... 10% (225 MVA)
Grupo de conexión .......................................................................................................... YNd1
Neutro a tierra .................................................................................................. Conexión sólida
Además, de los estudios realizados en la sección 4, se concluye que el bloque de potencia
Generador-Transformador Principal opera dentro de los límites establecidos tanto de tensión,
como de capacidad para cualquier caso de operación en la red.
CÁLCULOS. TRANSFORMADOR PRINCIPAL
Rev. A
RFE-1-BAT-ECE-IDO-001 Pág/Page 18 de/of 18
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6. ANEXOS
Anexo I: Esquema Unifilar
Anexo II: Datos Generador
CÁLCULOS. TRANSFORMADOR PRINCIPAL
Rev. A
ANEXO I
RFE-1-BAT-ECE-IDO-001 Pág/Page 1 de/of 2
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ANEXO I:
ESQUEMA UNIFILAR
One-Line Diagram - OLV1 (Load Flow Analysis)
page 1 18:37:17 abr 30, 2014 Project File: Eten-XFR_PPL
RESERVA FRÍA ETEN
DIMENSIONAMIENTO DE TRANSFORMADOR
PRINCIPAL (REV A)
SS_AA
18 kV
BUS GEN
18 kV
S.E. Etén
220 kV
S.E. Reque
220 kV
1MKA76_BS
8,44 MW
Servicios_Aux
5 MVA
Red eléctrica Peruana
3022 MVAsc
Narcissus
AL 2,92 km
1BAT10
13,33 %Z
220/18 kV
YNd1
300 MVA
6% TapP
1MKA10
225 MW
Isolated Phase CU
35 m
Isolated Phase CU
35 mIsolated Phase CU
8 m
SS_AA
18 kV
S.E. Reque
220 kV
BUS GEN
18 kV
S.E. Etén
220 kV
1MKA10
225 MW
Isolated Phase CU
35 m
Isolated Phase CU
35 m
1BAT10
13,33 %Z
220/18 kV
YNd1
300 MVA
6% TapP
Isolated Phase CU
8 m
Red eléctrica Peruana
3022 MVAsc
Narcissus
AL 2,92 km
Servicios_Aux
5 MVA
1MKA76_BS
8,44 MW
CÁLCULOS. TRANSFORMADOR PRINCIPAL
Rev. A
ANEXO II
RFE-1-BAT-ECE-IDO-001 Pág/Page 1 de/of 14
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ANEXO II:
DATOS GENERADOR
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SIGNATURES & DATES
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DRAWN DATE (YYYY-MM-DD) - 12/10/26
CHECKED - See PLM
GENERATOR ELECTRICAL DATAUTE Reserva Fria Eten
CHECKED DATE (YYYY-MM-DD) -12/10/26
ENGR - SEE PLM
ENGRG DATE (YYYY-MM-DD) - 12/10/26FIRST MADE FOR: 761X201 MLI/COST CODE: C902
APPLIED PRACTICES
ADDITIONAL APPROVALSSEE PLM SYSTEM FOR REGISTERED
INFORMATION
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REV ZONE DESCRIPTIONDATE
(YYYY-MM-DD)APPROVED
- N/A Initial Release. ECO0078796 12/10/26 See PLM
ITEM DESCRIPTION DWG. NO.
LIST OF COMPLEMENTARY DOCUMENTS
THIS DRAWING TO BE REVISED IN MICROSOFT WORD ONLY. THE SOURCE FILE IS STORED IN A SECURE DATABASE
THIS DOCUMENT SHALL BE REVISED IN ITS ENTIRETY. ALL SHEETS OF THIS DOCUMENT ARE THE SAME REVISION LEVEL AS INDICATED.
REVISION DESCRIPTION IS FULLY STATED ON FIRST SHEET OF DOCUMENT
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ESTIMATED GENERATOR DATA
Customer: ACS Cobra
Station/Project: UTE Reserva Fria Eten
Generator Number: 761X201
Generator Type: 7FH2B LU
GENERATOR RATING
Data for Proposal No/Electrical Design: 726191G2 Jul 23 2012
ATB 2 281250 kVA 3600 RPM 18000 Volts 0.8 PF 45 psig (310 kPa) 42 °C Gas 225000 kW 9021 Amps410 Field Volts 79 Ft (24.1 m) Alt 0.44 SCR 60 Hz 3 Phase WYE Connection
Exciter Rating
Type Static
875 kW 410 Volts 2134 D.C.Amps Field Amps @ Generator rated Load 2011
Total temperatures are guaranteed not to exceed:
Stator coils: 104 °C by embedded detector
Field coils 120 °C by Resistance
Collector Gas Rise 20 °C by RTD
Insulation Class
Armature F
Field F
Temperature Rise
B
B
COOLING WATER REQUIREMENTS @ GENERATOR RATING
Generator Output: 281250 kVA
Loss to Coolers: 2075 kW
Inlet Water Temperature: 36.4 °C
Outlet Cold Gas Temperature 42 °C
Coolant 100% Water
Maximum Fouling Factor: 0.0005 ft2 hr °F/ Btu (0.0881 m2 °K/ kW)
Total Water Flow Required: 1820 GPM (413.1 m3/hr) (total for all coolers)
Coolant temperature Max 40.7 °C
Head Loss Per Cooler: 12.92 Feet of Water (38.6 kPa)
Maximum Operating Pressure: 125 psig (862 kPa)
DIELECTRIC TESTS (Between coils and ground, 50/60 hertz AC for 1 min)
Stator 37000V
Rotor 3750V
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REACTANCES (Per Unit): Direct Axis Quadrature AxisSaturated Synchronous Xdv 2.39 Xqv 2.27Unsaturated Synchronous Xdi 2.39 Xqi 2.27Saturated Transient X'dv 0.265Unsaturated Transient X'di 0.300 X'q 0.505Saturated Sub transient X"dv 0.170 X"qv 0.170Unsaturated Sub transient X"di 0.220 X"qi 0.220Saturated Negative Sequence X2v 0.170Unsaturated Negative Sequence X2i 0.220Saturated Zero Sequence X0v 0.115Unsaturated Zero Sequence X0i 0.115Saturated Leakage Reactance Xlv 0.150Unsaturated Leakage Reactance Xli 0.170
FIELD TIME CONSTANTS (Seconds @ 125 °C)Open Circuit T'd0 7.7 T'q0 0.62Three Phase Short Circuit Transient T'd3 0.77 T'q 0.14Line To Line Short Circuit Transient T'd2 1.32Line To Neutral Short Circuit Transient T'd1 1.6Short Circuit Sub transient T"d 0.026 T"q 0.026Open Circuit Sub transient T"d0 0.039 T"q0 0.076
ARMATURE DC COMPONENT TIME CONSTANTS (Seconds@ 100 °C)
Three Phase Short Circuit Ta3 0.42Line To Line Short Circuit Ta2 0.42Line To Neutral Short Circuit Ta1 0.32
ARMATURE WINDING SEQUENCE RESISTANCES (Per Unit)
Positive R1 0.0033Negative R2 0.0155Zero R0 0.0067
Reactance, Resistance and Time Constant data may be interpreted per IEEE 115, Part II.
The base reactance (“UNIT”) is calculated by the armature kV squared / MVA.
Base reactance = 1.152 Ohms
Rotor Short-Time Thermal Capacity, (I2)2t 10 s
Turbine-Generator Combined Train Inertia, WR2
389970 lb-ft2
(16433 kg-m2)
Turbine-Generator Combined Inertia Constant, H 4.151 kW-s/kVA
Three Phase Armature Winding Capacitance 0.9651 F
Armature Winding DC Resistance (Per Phase) 0.001472 Ω (100 °C)
Field Winding DC Resistance 0.1804 Ω (125 °C)
Field Current At Rated Kva, Armature Voltage, & PF 2011 A
Field Current At Rated Kva, Armature Voltage, 0 PF Lagging*
2460 A
(*For Systems Study Only - Not Allowable Operating Point)
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MACHINE SATURATION DATA
S/1.0 = 0.0792 Machine saturation may be calculated from the data of curves A and B of
S/1.2 = 0.7214 “ESTIMATED SATURATION AND SYNCHRONOUS IMPEDANCE CURVES”.
“S/1.0” is the field amp difference from B to A divided by the field amp of A at 1.0 pu voltage.
X/R RATIO
X/R = 134 X/R ratio equals “XPP/DV” * base reactance / armature DC resistance at 100 C
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