Calculation For Transformer Sizing
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ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING
00
10-NOV-17
AFC
APPROVED FOR CONSTRUCTION
NIM
MH
MSELMI
B
27-OCT-17
IFR
ISSUED FOR REVIEW
NIM
MH
MSELMI
A
23-OCT-17
IDC
INTERNAL DISCIPLINE CHECK
NIM
MH
MSELMI
REV
DATE
STATUS
ISSUE PURPOSE
ISSUED BY
REVIEWED BY
APPROVED BY
COMPANY DOCUMENT ATTRIBUTES Company Code
Contract Territory Code
Originator Code
Facility Code
System Code
Discipline
Document Type
Sequence Number
8015
0151
EPPM
12
845
EL
CC
20001
This document is property of the COMPANY and it shall not be disclosed to third parties, or reproduced, without permission of the COMPANY.
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING COMPANY Doc. No.: 8015-0151-EPPM-12-845-EL-CC-20001 CONTRACTOR Doc. No.: R1117-CLC-EL-01-203
Rev.: 00
Status: AFC
Page:
2 of 9
DOCUMENT REVISION HISTORY SHEET REV
STATUS
DATE ISSUED
UPDATE / AMENDMENT DETAILS
A
IDC
23-OCT-17
INTERNAL DISCIPLINE CHECK
B
IFR
27-OCT-17
ISSUED FOR REVIEW APPROVED FOR CONSTRUCTION
00
AFC
-
PAGE 8: ITEM 3.3.1. LOAD REQUIREMENTS OF 132/6,9 KV TRANSFORMER: MODIFIED
-
PAGE 8: ITEM 3.3.2. LOAD REQUIREMENTS OF 6,6/0,42 KV TRANSFORMER: MODIFIED
-
PAGE 8: ITEM 3.4.1. RATING CAPACITY OF 132/6,9 KV TRANSFORMER: MODIFIED
-
PAGE 9: ITEM 3.4.2. RATING CAPACITY OF 6,6/0,42 KV TRANSFORMER: MODIFIED
10-NOV-17
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING COMPANY Doc. No.: 8015-0151-EPPM-12-845-EL-CC-20001 CONTRACTOR Doc. No.: R1117-CLC-EL-01-203
Rev.: 00
Status: AFC
Page:
3 of 9
CONTENT 1. INTRODUCTION .................................................................................................................. 4 1.1 Objectives........................................................................................................................... 4 1.2 Scope................................................................................................................................... 4 1.3 Definitions .......................................................................................................................... 4 1.4 Abbreviations .................................................................................................................... 4 1.5 Reference Documents ....................................................................................................... 5 1.6 List codes and standard .................................................................................................... 5 2. ENVIRONMENTAL CONDITIONS ................................................................................... 6 3. TRANSFORMER CAPACITY CALCULATION .............................................................. 7 3.1 Calculation Method .......................................................................................................... 7 3.2 Sizing Criteria ................................................................................................................... 7 3.2.1 The rating Capacity of 132/6,9 kV Transformer ........................................................ 7 3.2.2 The rating Capacity of 6,6/0,42 kV Transformer ....................................................... 7 3.3 Load Requirements ........................................................................................................... 7 3.3.1 Load Requirements of 132/6,9 kV Transformer ......................................................... 7 3.3.2 Load Requirements of 6,6/0,42 kV Transformer ........................................................ 8 3.4 Load Requirements ........................................................................................................... 8 3.4.1 Rating Capacity of 132/6,9 kV Transformer .............................................................. 8 3.4.2 Rating Capacity of 6,6/0,42 kV Transformer ............................................................. 9 4. CONCLUSIONS ..................................................................................................................... 9
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING COMPANY Doc. No.: 8015-0151-EPPM-12-845-EL-CC-20001 CONTRACTOR Doc. No.: R1117-CLC-EL-01-203 1.
INTRODUCTION
1.1
Objectives
Rev.: 00
Status: AFC
Page:
4 of 9
The purpose of this document is to calculate the capacity of the transformers to be installed in the Well pad 11/1A. The following calculations are used to calculate the rating power of the 132/6,9 KV Transformers (11-845-11/1A-ETR-001A & 11-845-11/1A-ETR-001B) and the 6,6/0.42 KV Transformers (11845-11/1A-ETR-002A & 11-845-11/1A-ETR-002B) to be installed in the WP 11/1A in the Substation (12-830-ESS-11/1A). The 132/6,9 kV shall have off load tap changers. 1.2
Scope
The data reported in this document are valid for new installation at well pad #11/1A. 1.3
Definitions
For the purpose of this document the following definitions shall apply: PROJECT:
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
COMPANY:
LUKOIL MID-EAST LIMITED
CONTRACTOR:
EPPM/MSK Consortium
SUPPLIER/VENDOR:
The party(s) which manufactures and/or supplies equipment, technical Documents/drawings and services to perform the duties specified
1.4
Abbreviations
The following abbreviations are used in this document: ESS
Substation
ESW
Switchgear
ETR
Transformer
WP
Well pad
IEC
International Electrotechnical Commission
NEMA
National Electrical Manufacturers Association
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING COMPANY Doc. No.: 8015-0151-EPPM-12-845-EL-CC-20001 CONTRACTOR Doc. No.: R1117-CLC-EL-01-203
1.5
Rev.: 00
Status: AFC
Page:
5 of 9
Reference Documents Ref. No.
Title
8015-0151-EPPM-12-800-EL-SP-00004
Project Electrical Specification
8015-0151-EPPM-12-845-EL-SP-00001
Technical Specification Power Transformers
8015-0151-EPPM-12-800-EL-LS-20001
Electrical Load List
8015-0151-EPPM-12-840-EL-DH-20001
Single Line Diagram Of WP-11 Substation
1.6
List codes and standard
IEC 60034
Rotating electrical machines
IEC 60044-1
Instrument transformers - Part 1: Current transformers
IEC 60050-421
International Electrotechnical Vocabulary - Chapter 421: Power transformers and reactors
IEC 60076-1
Power transformers - General
IEC 60076-2
Power transformers - Temperature rise
IEC 60076-3
Power transformers - Insulation levels, dielectric tests and external clearances in air
IEC 60076-5
Power transformers - Ability to withstand short circuit
IEC 60076-7
Power transformers - Loading guide for oil-immersed power transformers
IEC 60076-10
Power transformers - Determination of sound levels
IEC 60085
Electrical insulation - Thermal evaluation and designation
IEC 60137
Insulated bushings for alternating voltages above 1000 V
IEC 60214
Tap changers
IEC 60296
Specification for unused mineral insulating oils for transformers and switchgear
IEC 60445
Identification of equipment terminals and of terminations of certain designated conductors, including general rules for an alphanumeric system
IEC 60529
Degrees of protection provided by enclosures
IEC/TR 60616
Terminal and tapping markings for power transformers
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING COMPANY Doc. No.: 8015-0151-EPPM-12-845-EL-CC-20001 CONTRACTOR Doc. No.: R1117-CLC-EL-01-203
Rev.: 00
Status: AFC
Page:
6 of 9
IEC 60947
Low voltage switchgear and controlgear
IEC 61639
Direct connection between power transformers and gas-insulated metalenclosed switchgear for rated voltages 72.5 kV and above
IEC 62041
Power transformers, power supply units, reactors and similar products EMC requirements Fluid-filled and extruded insulation cables Fluid-filled and dry type cable-terminations
NEMA TR1 2.
Transformers, regulators and reactors
ENVIRONMENTAL CONDITIONS
The design of the equipment and of its components shall comply with the following environmental conditions: Altitude
: < 1000 m.a.s.l.
Pollution level
: Heavy
Dust storm
: 21.5 days / year
Thunder storm
: 15 days / year
Design maximum wind velocity
: 40.2 m/s
Ice loading
: None
Earthquake (as per Uniform Building Code)
: Zone 1
Design maximum ambient temperature outdoor
: 55 °C
Indoor
: 40 °C
Maximum daily / yearly average
: 40/30 °C
Design minimum ambient temperature outdoor
: -5 °C
Indoor
: 0 °C
Highest one day variation
: 25 °C
Sun temperature in direct sunlight
: 83 °C
Maximum ground temperature at 100 mm depth
: 35 °C
Maximum relative humidity at 40°C
: 86 %
Minimum relative humidity
: 18 %
Yearly average
: 38/44 %
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING COMPANY Doc. No.: 8015-0151-EPPM-12-845-EL-CC-20001 CONTRACTOR Doc. No.: R1117-CLC-EL-01-203 3.
TRANSFORMER CAPACITY CALCULATION
3.1
Calculation Method
Rev.: 00
Status: AFC
Page:
7 of 9
The total electrical loads are calculated based on the following formulate: Maximum load (normal running load) = (Continuous load * X) + (Intermittent load * Y) Peak load = (Continuous load * X) + (Intermittent load * Y) + (Standby Load * Z) X, Y, and Z are coincidence factors, which are as follows: X = 1.0 for continuous load Y = 0.3 for intermittent load Z = 0.1 for Standby load 3.2 3.2.1
Sizing Criteria The rating Capacity of 132/6,9 kV Transformer
There are two (02) sets of 132/6,9 kV Power Transformers (11-845-11/1A-ETR-001A & B) in Well-11/1A feeding 6,6kV Switchgear (12-842-11/1A-ESW-001A & B). The transformer shall be sized to feed 100% capacity of load of its feeding Switchgear + 25% Margin for design growth during project execution phase and spare for future). The rating shall ensure that transformer is adequate to supply the entire load of the switchgear when the mobile generator is not in operation. The capacity of the transformer will be equal and above the peak load. 3.2.2
The rating Capacity of 6,6/0,42 kV Transformer
There are two (02) sets of 6.6/0.42kV Distribution Transformers (11-845-11/1A-ETR-002A & B) in Well-11/1A feeding the 400V Switchgear (12-843-11/1A-ESW-001A & B). The transformer shall be sized to feed 100% capacity of load of its feeding Switchgear + 25% Margin for design growth during project execution phase and spare for future. The rating shall ensure that transformer is adequate to supply the entire load of the switchgear when the mobile generator is not in operation. The capacity of the transformer will be equal and above the peak load. 3.3 3.3.1
Load Requirements Load Requirements of 132/6,9 kV Transformer
Based on Electrical Load List (Doc. No. 8015-0151-EPPM-12-800-EL-LS-20001), load requirement of 6,6 kV switchgear is tabulated below in Tab. 1:
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING COMPANY Doc. No.: 8015-0151-EPPM-12-845-EL-CC-20001 CONTRACTOR Doc. No.: R1117-CLC-EL-01-203
Switchgear
11-842-11/1A-ESW-001A & B
Maximum Normal Load
Rev.: 00
Status: AFC
Page:
8 of 9
Total Peak Load
kW
kVAr
kVA
kW
kVAr
kVA
4028
1964
4482
4047
1974
4503
00
Tab. 1 3.3.2
Load Requirements of 6,6/0,42 kV Transformer
Based on Electrical Load List (Doc. No. 8015-0151-EPPM-12-800-EL-LS-20001), load requirement of 400V switchgear is tabulated below Tab. 2:
Switchgear
11-843-11/1A-ESW-001A & B
Maximum Normal Load
Total Peak Load
kW
kVAr
kVA
kW
kVAr
kVA
235
126
267
254
136
288
Tab. 2 3.4
Load Requirements
3.4.1
Rating Capacity of 132/6,9 kV Transformer
Transformer capacity calculating list are as following:
00
ACTIVE POWER [kW]
4028
REACTIVE POWER [kvar]
1964
APPARENT POWER [kVA]
4482
ABSORBED CURRENT [A]
392.08
POWER FACTOR
0.90
CONSIDER 25% MARGIN [kVA]
4482 x (1+0.25) = 5602.5
SELECTED CAPACITY [kVA]
10000
NO LOAD LOSSES [kW]
To be defined by Vendor.
LOAD LOSSES [kW]
To be defined by Vendor.
00
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING COMPANY Doc. No.: 8015-0151-EPPM-12-845-EL-CC-20001 CONTRACTOR Doc. No.: R1117-CLC-EL-01-203
Rev.: 00
Status: AFC
Page:
9 of 9
TOTAL LOSSES [kW]
To be defined by Vendor.
LOAD FACTOR[%]
To be defined by Vendor.
WHETHER MEET REQUIREMENT
YES Tab. 3
3.4.2
Rating Capacity of 6,6/0,42 kV Transformer
00
Transformer capacity calculating list are as following: ACTIVE POWER [kW]
235
REACTIVE POWER [kvar]
126
APPARENT POWER [kVA]
267
ABSORBED CURRENT [A]
385.4
POWER FACTOR
0.9
CONSIDER 25% MARGIN [kVA]
267 x (1+0.25) = 333.75
SELECTED CAPACITY [kVA]
1250
NO LOAD LOSSES [kW]
To be defined by Vendor.
LOAD LOSSES [kW]
To be defined by Vendor.
TOTAL LOSSES [kW]
To be defined by Vendor.
LOAD FACTOR[%]
To be defined by Vendor.
WHETHER MEET REQUIREMENT
YES Tab. 4
4.
CONCLUSIONS
Based on the results of calculations, a conclusion can be made: the transformers capacity of 10000kVA and 1250 kVA meets the expected load requirements. The transformer capacity of 132/6,9 kV is calculated considering the power of the switchgears relatively Bus A and Bus B.
CALCULATION FOR TRANSFORMER SIZING
00
10-NOV-17
AFC
APPROVED FOR CONSTRUCTION
NIM
MH
MSELMI
B
27-OCT-17
IFR
ISSUED FOR REVIEW
NIM
MH
MSELMI
A
23-OCT-17
IDC
INTERNAL DISCIPLINE CHECK
NIM
MH
MSELMI
REV
DATE
STATUS
ISSUE PURPOSE
ISSUED BY
REVIEWED BY
APPROVED BY
COMPANY DOCUMENT ATTRIBUTES Company Code
Contract Territory Code
Originator Code
Facility Code
System Code
Discipline
Document Type
Sequence Number
8015
0151
EPPM
12
845
EL
CC
20001
This document is property of the COMPANY and it shall not be disclosed to third parties, or reproduced, without permission of the COMPANY.
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING COMPANY Doc. No.: 8015-0151-EPPM-12-845-EL-CC-20001 CONTRACTOR Doc. No.: R1117-CLC-EL-01-203
Rev.: 00
Status: AFC
Page:
2 of 9
DOCUMENT REVISION HISTORY SHEET REV
STATUS
DATE ISSUED
UPDATE / AMENDMENT DETAILS
A
IDC
23-OCT-17
INTERNAL DISCIPLINE CHECK
B
IFR
27-OCT-17
ISSUED FOR REVIEW APPROVED FOR CONSTRUCTION
00
AFC
-
PAGE 8: ITEM 3.3.1. LOAD REQUIREMENTS OF 132/6,9 KV TRANSFORMER: MODIFIED
-
PAGE 8: ITEM 3.3.2. LOAD REQUIREMENTS OF 6,6/0,42 KV TRANSFORMER: MODIFIED
-
PAGE 8: ITEM 3.4.1. RATING CAPACITY OF 132/6,9 KV TRANSFORMER: MODIFIED
-
PAGE 9: ITEM 3.4.2. RATING CAPACITY OF 6,6/0,42 KV TRANSFORMER: MODIFIED
10-NOV-17
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING COMPANY Doc. No.: 8015-0151-EPPM-12-845-EL-CC-20001 CONTRACTOR Doc. No.: R1117-CLC-EL-01-203
Rev.: 00
Status: AFC
Page:
3 of 9
CONTENT 1. INTRODUCTION .................................................................................................................. 4 1.1 Objectives........................................................................................................................... 4 1.2 Scope................................................................................................................................... 4 1.3 Definitions .......................................................................................................................... 4 1.4 Abbreviations .................................................................................................................... 4 1.5 Reference Documents ....................................................................................................... 5 1.6 List codes and standard .................................................................................................... 5 2. ENVIRONMENTAL CONDITIONS ................................................................................... 6 3. TRANSFORMER CAPACITY CALCULATION .............................................................. 7 3.1 Calculation Method .......................................................................................................... 7 3.2 Sizing Criteria ................................................................................................................... 7 3.2.1 The rating Capacity of 132/6,9 kV Transformer ........................................................ 7 3.2.2 The rating Capacity of 6,6/0,42 kV Transformer ....................................................... 7 3.3 Load Requirements ........................................................................................................... 7 3.3.1 Load Requirements of 132/6,9 kV Transformer ......................................................... 7 3.3.2 Load Requirements of 6,6/0,42 kV Transformer ........................................................ 8 3.4 Load Requirements ........................................................................................................... 8 3.4.1 Rating Capacity of 132/6,9 kV Transformer .............................................................. 8 3.4.2 Rating Capacity of 6,6/0,42 kV Transformer ............................................................. 9 4. CONCLUSIONS ..................................................................................................................... 9
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING COMPANY Doc. No.: 8015-0151-EPPM-12-845-EL-CC-20001 CONTRACTOR Doc. No.: R1117-CLC-EL-01-203 1.
INTRODUCTION
1.1
Objectives
Rev.: 00
Status: AFC
Page:
4 of 9
The purpose of this document is to calculate the capacity of the transformers to be installed in the Well pad 11/1A. The following calculations are used to calculate the rating power of the 132/6,9 KV Transformers (11-845-11/1A-ETR-001A & 11-845-11/1A-ETR-001B) and the 6,6/0.42 KV Transformers (11845-11/1A-ETR-002A & 11-845-11/1A-ETR-002B) to be installed in the WP 11/1A in the Substation (12-830-ESS-11/1A). The 132/6,9 kV shall have off load tap changers. 1.2
Scope
The data reported in this document are valid for new installation at well pad #11/1A. 1.3
Definitions
For the purpose of this document the following definitions shall apply: PROJECT:
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
COMPANY:
LUKOIL MID-EAST LIMITED
CONTRACTOR:
EPPM/MSK Consortium
SUPPLIER/VENDOR:
The party(s) which manufactures and/or supplies equipment, technical Documents/drawings and services to perform the duties specified
1.4
Abbreviations
The following abbreviations are used in this document: ESS
Substation
ESW
Switchgear
ETR
Transformer
WP
Well pad
IEC
International Electrotechnical Commission
NEMA
National Electrical Manufacturers Association
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING COMPANY Doc. No.: 8015-0151-EPPM-12-845-EL-CC-20001 CONTRACTOR Doc. No.: R1117-CLC-EL-01-203
1.5
Rev.: 00
Status: AFC
Page:
5 of 9
Reference Documents Ref. No.
Title
8015-0151-EPPM-12-800-EL-SP-00004
Project Electrical Specification
8015-0151-EPPM-12-845-EL-SP-00001
Technical Specification Power Transformers
8015-0151-EPPM-12-800-EL-LS-20001
Electrical Load List
8015-0151-EPPM-12-840-EL-DH-20001
Single Line Diagram Of WP-11 Substation
1.6
List codes and standard
IEC 60034
Rotating electrical machines
IEC 60044-1
Instrument transformers - Part 1: Current transformers
IEC 60050-421
International Electrotechnical Vocabulary - Chapter 421: Power transformers and reactors
IEC 60076-1
Power transformers - General
IEC 60076-2
Power transformers - Temperature rise
IEC 60076-3
Power transformers - Insulation levels, dielectric tests and external clearances in air
IEC 60076-5
Power transformers - Ability to withstand short circuit
IEC 60076-7
Power transformers - Loading guide for oil-immersed power transformers
IEC 60076-10
Power transformers - Determination of sound levels
IEC 60085
Electrical insulation - Thermal evaluation and designation
IEC 60137
Insulated bushings for alternating voltages above 1000 V
IEC 60214
Tap changers
IEC 60296
Specification for unused mineral insulating oils for transformers and switchgear
IEC 60445
Identification of equipment terminals and of terminations of certain designated conductors, including general rules for an alphanumeric system
IEC 60529
Degrees of protection provided by enclosures
IEC/TR 60616
Terminal and tapping markings for power transformers
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING COMPANY Doc. No.: 8015-0151-EPPM-12-845-EL-CC-20001 CONTRACTOR Doc. No.: R1117-CLC-EL-01-203
Rev.: 00
Status: AFC
Page:
6 of 9
IEC 60947
Low voltage switchgear and controlgear
IEC 61639
Direct connection between power transformers and gas-insulated metalenclosed switchgear for rated voltages 72.5 kV and above
IEC 62041
Power transformers, power supply units, reactors and similar products EMC requirements Fluid-filled and extruded insulation cables Fluid-filled and dry type cable-terminations
NEMA TR1 2.
Transformers, regulators and reactors
ENVIRONMENTAL CONDITIONS
The design of the equipment and of its components shall comply with the following environmental conditions: Altitude
: < 1000 m.a.s.l.
Pollution level
: Heavy
Dust storm
: 21.5 days / year
Thunder storm
: 15 days / year
Design maximum wind velocity
: 40.2 m/s
Ice loading
: None
Earthquake (as per Uniform Building Code)
: Zone 1
Design maximum ambient temperature outdoor
: 55 °C
Indoor
: 40 °C
Maximum daily / yearly average
: 40/30 °C
Design minimum ambient temperature outdoor
: -5 °C
Indoor
: 0 °C
Highest one day variation
: 25 °C
Sun temperature in direct sunlight
: 83 °C
Maximum ground temperature at 100 mm depth
: 35 °C
Maximum relative humidity at 40°C
: 86 %
Minimum relative humidity
: 18 %
Yearly average
: 38/44 %
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING COMPANY Doc. No.: 8015-0151-EPPM-12-845-EL-CC-20001 CONTRACTOR Doc. No.: R1117-CLC-EL-01-203 3.
TRANSFORMER CAPACITY CALCULATION
3.1
Calculation Method
Rev.: 00
Status: AFC
Page:
7 of 9
The total electrical loads are calculated based on the following formulate: Maximum load (normal running load) = (Continuous load * X) + (Intermittent load * Y) Peak load = (Continuous load * X) + (Intermittent load * Y) + (Standby Load * Z) X, Y, and Z are coincidence factors, which are as follows: X = 1.0 for continuous load Y = 0.3 for intermittent load Z = 0.1 for Standby load 3.2 3.2.1
Sizing Criteria The rating Capacity of 132/6,9 kV Transformer
There are two (02) sets of 132/6,9 kV Power Transformers (11-845-11/1A-ETR-001A & B) in Well-11/1A feeding 6,6kV Switchgear (12-842-11/1A-ESW-001A & B). The transformer shall be sized to feed 100% capacity of load of its feeding Switchgear + 25% Margin for design growth during project execution phase and spare for future). The rating shall ensure that transformer is adequate to supply the entire load of the switchgear when the mobile generator is not in operation. The capacity of the transformer will be equal and above the peak load. 3.2.2
The rating Capacity of 6,6/0,42 kV Transformer
There are two (02) sets of 6.6/0.42kV Distribution Transformers (11-845-11/1A-ETR-002A & B) in Well-11/1A feeding the 400V Switchgear (12-843-11/1A-ESW-001A & B). The transformer shall be sized to feed 100% capacity of load of its feeding Switchgear + 25% Margin for design growth during project execution phase and spare for future. The rating shall ensure that transformer is adequate to supply the entire load of the switchgear when the mobile generator is not in operation. The capacity of the transformer will be equal and above the peak load. 3.3 3.3.1
Load Requirements Load Requirements of 132/6,9 kV Transformer
Based on Electrical Load List (Doc. No. 8015-0151-EPPM-12-800-EL-LS-20001), load requirement of 6,6 kV switchgear is tabulated below in Tab. 1:
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING COMPANY Doc. No.: 8015-0151-EPPM-12-845-EL-CC-20001 CONTRACTOR Doc. No.: R1117-CLC-EL-01-203
Switchgear
11-842-11/1A-ESW-001A & B
Maximum Normal Load
Rev.: 00
Status: AFC
Page:
8 of 9
Total Peak Load
kW
kVAr
kVA
kW
kVAr
kVA
4028
1964
4482
4047
1974
4503
00
Tab. 1 3.3.2
Load Requirements of 6,6/0,42 kV Transformer
Based on Electrical Load List (Doc. No. 8015-0151-EPPM-12-800-EL-LS-20001), load requirement of 400V switchgear is tabulated below Tab. 2:
Switchgear
11-843-11/1A-ESW-001A & B
Maximum Normal Load
Total Peak Load
kW
kVAr
kVA
kW
kVAr
kVA
235
126
267
254
136
288
Tab. 2 3.4
Load Requirements
3.4.1
Rating Capacity of 132/6,9 kV Transformer
Transformer capacity calculating list are as following:
00
ACTIVE POWER [kW]
4028
REACTIVE POWER [kvar]
1964
APPARENT POWER [kVA]
4482
ABSORBED CURRENT [A]
392.08
POWER FACTOR
0.90
CONSIDER 25% MARGIN [kVA]
4482 x (1+0.25) = 5602.5
SELECTED CAPACITY [kVA]
10000
NO LOAD LOSSES [kW]
To be defined by Vendor.
LOAD LOSSES [kW]
To be defined by Vendor.
00
ENGINEERING, PROCUREMENT & CONSTRUCTION FOR PRODUCTION WELL PAD 11/1A AND ASSOCIATED GATHERING SYSTEM EXPANSION AT THE WEST QURNA (PHASE 2) CONTRACT AREA
CALCULATION FOR TRANSFORMER SIZING COMPANY Doc. No.: 8015-0151-EPPM-12-845-EL-CC-20001 CONTRACTOR Doc. No.: R1117-CLC-EL-01-203
Rev.: 00
Status: AFC
Page:
9 of 9
TOTAL LOSSES [kW]
To be defined by Vendor.
LOAD FACTOR[%]
To be defined by Vendor.
WHETHER MEET REQUIREMENT
YES Tab. 3
3.4.2
Rating Capacity of 6,6/0,42 kV Transformer
00
Transformer capacity calculating list are as following: ACTIVE POWER [kW]
235
REACTIVE POWER [kvar]
126
APPARENT POWER [kVA]
267
ABSORBED CURRENT [A]
385.4
POWER FACTOR
0.9
CONSIDER 25% MARGIN [kVA]
267 x (1+0.25) = 333.75
SELECTED CAPACITY [kVA]
1250
NO LOAD LOSSES [kW]
To be defined by Vendor.
LOAD LOSSES [kW]
To be defined by Vendor.
TOTAL LOSSES [kW]
To be defined by Vendor.
LOAD FACTOR[%]
To be defined by Vendor.
WHETHER MEET REQUIREMENT
YES Tab. 4
4.
CONCLUSIONS
Based on the results of calculations, a conclusion can be made: the transformers capacity of 10000kVA and 1250 kVA meets the expected load requirements. The transformer capacity of 132/6,9 kV is calculated considering the power of the switchgears relatively Bus A and Bus B.
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