Substation Asset Specification Effective Date 10 Sep … Spec... · 132/22 kV Switching Substation...

Substation Asset Specification

Dwarsberg 132/22 kV Switching Substation

Unique Identifier 240-57617932

Document Type Template

Revision 1.0

Effective Date 10 Sep 2013

Reference Number NDwa06P01-C07- 01

Group Technology (Engineering)

NDwa06 P01– Dwarsberg 132/22 kV Switching Substation of 27

PROJECT INFORMATION

PROJECT NAME: Dwarsberg Switching Substation

SCHEME NAME: PPC Strengthening

SUBSTATION NAME: Dwarsberg 132/22 kV Switching Substation

OPERATING UNIT: Northern Grid

PROJECT NUMBER: N.ETDALBS.D.NG.INT.TE

PROJECT UNIQUE IDENTIFIER: NDwa06 P01

Revision: 2

RELATED/SUPPORTING DOCUMENTS

STATION ELECTRIC DIAGRAM : 0.08/19986 Rev. 0

KEY PLAN : 0.08/19987 Rev. 1

PLANNING/TECHNICAL REPORT

Title: Dwaalboom PPC/BPC Network Analysis,

Report No.: TSP Report 06/32

Revision - 2 June 2011.





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1 PROJECT DESCRIPTION

Provide a platform so as to construct Dwarsberg 132/22 kV Switching Substation. The 132 kV Yard and 22 kV

Yard will have the following layout. A six bay 132 kV (Φ 200 x 6 WT Al TUBE) double Tubular bus-bar

arrangement with a 132 kV Bus Coupler to couple the two bus-bars. The 132 kV double bus-bar arrangement

assures security of supply to BPC. A 22 kV 4 bay single Bull conductor Strung bus-bar arrangement.

The 132 kV Feeders namely Dwaalboom to Gaborone South and Spitskop to Segoditshane need to be

switched. They serve an international customer and have need of Double bus-bar selection with a By-pass

facility on the 4 x 132 kV bays. Dwaalboom PPC will always have security of supply from a line perspective

irrespective of any single contingency.

To provide an auxiliary supply; a 132/22 kV 10 MVA Star/Delta Transformer with a NEC/NER/Aux 22/0.4 kV

Transformer will be set up. The Aux 22/0.4 kV Transformer will also provide a 400 V, 315 kVA, Aux supply.

A 22 kV Distribution Line will supply the Switching Substation to ensure a backup supply via the 22/0.4 kV,

315 kVA Aux Transformer.

The 132/22 kV 10 MVA Transformer is sufficiently rated to provide a constant auxiliary supply, as well as to

strengthen the local 22 kV network if required.

The construction of this substation is to ensure that Eskom meets the PPC contractual agreements.





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2 SUBSTATION LAYOUT DESIGN AND APPLICATIONS

2.1 Philosophy of Design

2.1.1 132 kV System

The “Hybrid” type substation layout is planned to accommodate a 132 kV Bus-bar 1 & 2,

Φ200 x 6 WT Al Tubular design with Double bus-bar selection and By-pass facility for the feeder bays.

1 x 132/22 kV 10 MVA Star/Delta Transformer,

1 x 132 kV Transformer bay,

4 x132 kV Feeder bays,

1 x 132 kV Bus Coupler bay,

3 x 132 kV VT’s on Busbar 1 & 2,

3. HIGH LEVEL SCOPE

3.1. 132 kV Yard

The scope of work for the 132 kV System is as follows:

Qty Bay Scope of Work

1 Feeder-1 3 x conventional Isol, 1 x Inline Isol, 1 x CB, 3 x CT’s, & 3 x SA’s, 12 x C4

Post I’s and 1 x 1JB0333 & 1JB0602

String 1 x Bull conductor at dropper level.

3 Feeder-2, 3 & 4 3 x conventional Isol, 1 x Inline Isol, 1 x CB, 3 x CT’s, 2 x VT’s, 2 x Line

Trap’s, 3 x SA’s, 8 x C4 Post I’s and 1 x 1JB0333 & 1JB0602


1 Transformer-1

132/22 kV 10 MVA

Star/Delta Transformer

2 x conventional Isol, 1 x CB, 3 x CT’s, & 3 x SA’s and 1 x 1JB0333 & TDB


(SA’s mounted on Trfr.)

1 Bus Coupler -“A” 2 x conventional Isol, 3 x CT’s, 1 x CB and 5 x C4 Post I’s. and 1 x 1JB0333


2 sets Busbar-1 & 2

Voltage

Transformers

3 x VT’s.

String 1 x Centipede conductor at dropper level.

3.2.1 22 kV Yard

22 kV Strung single Bull conductor bus-bar





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1 x 22 kV Transformer / NEC/NER/Aux Trfr.-1 Bay, 1 x 22/0.4 kV 315 kVA Dyn11 Aux. Trfr-2 Bay, 1 x 22 kV Feeder Bay, 1 x Spare Bay 3 x 22 kV Busbar VT’s

The scope of work for the 22 kV System is as follows:

Qty Bay Scope of Work

1 Feeder-1 2 x Isol, 1 x CB, 3 x CT’s, 3 x SA’s, 3 x 33 kV PI’s and 1 x 1JB1700 structure

mounted.


1 22 kV Transformer-1

1 x Isol, 1 x CB, 3 x CT’s, 6 x SA’s. and 1JB1700 structure mounted & TDB

String 1 x Bull conductor. (SA’s mounted on Trfr.)

1 NEC/NER/Aux Trfr-1 String 1 x PVC Centipede conductor at dropper level

1 Aux Transformer-2 2 x Isol, 3 x CT’s, 1 x CB, 3 x SA’s., 3 x 33 kV PI’s, and 1JB1700 structure

mounted






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4 SUBSTATION DESIGN SPECIFICATIONS AND CONFIGURATION

4.2 HV Equipment

System Voltage (kV)

Rated normal current (A, min)

Short-circuit withstand current

(kA, min)

CT Bus Zone Ratio

BIL (kV, min)

Specific creepage distance

(mm/kV, min)

132 kV 2500 A 40 kA 1/1000 550 31

22 kV 2500 A 20 kA No BZ 150 25 & 31

4.3 Calculated Fault Current Levels

System Voltage (kV)

1Ǿ Fault Level (kA)-2013 3Ǿ Fault Level (kA) Medupi end state

Current New Current New

132 kV N/A 9.3 N/A 6.9

22 kV - - - -

4.4 Earthing System Design

System Voltage (kV) Earth-Tails Rating (kA)

132 kV 40 kA

22 kV 20 kA

4.5 Busbar Design

System Voltage

(kV)

Bulbar Configuration Electrical Clearances (min) Conductor Type

Bus-bar Rating @ 85 oC (A)

Phase-to-phase (mm)

Phase-to-earth (mm)

Current New

132 kV Double Bus Bar (1 & 2)

Tubular 1650 1200 Φ200 x 6 WT

Al N/A 4750

22 kV Single Bus Bar

Strung conductor 580 430 1 x Bull

N/A 1353

4.6 Station DC Voltage 110 V

4.7 Insulator Type

Glass & Composite





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5 CIVIL/STRUCTURAL REQUIREMENTS

5.1 Geotechnical Required

5.2 Topographical survey Required

5.3 Earthworks Required

5.4 Buildings Required

5.5 Foundations, plinths and trenches Required

5.6 Earth-mat (3 x tails) per 132 kV equipment structure (2 x tails) per 22 kV equipment structure

5.7 Yard Stone Required

5.8 Fencing Required

5.9 Roads Required

5.10 Drainage Required

5.11 Structural steel Required

5.12 Oil Dam Required





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6 132 kV YARD REQUIREMENTS

6.1 132 kV Feeder-1 Bay (Dwaalboom-1 Dx)

6.1.1 132 kV Primary Plant Requirements

Qty Equipment Specification

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3 Isolator Conventional

3-Ph, 2500A, 40kA (motorised) X

31 X X Steel Support by supplier

1 Inline Isolator 3-Ph, 2500A, 40kA (motorised) X


1 Circuit Breaker 3-Ph, 3150A, 40kA, (3 x Mec.) Single pole tripping & ARC capability

X


3 Current Transformer 2500A,40kA,6 Core:2 P,2 B,2 M X 31 X X Bus zone 1/1000

3 Surge Arrester 132kV 80 % X 31 X X

12 Post Insulators C4-550 X 31 X X

1 Junction Box 1JB0333 X X Foundation only

1 Junction Box 1JB0602 X

Structure

mounted

Conductor 1 x Bull X

Quantity depends on final design

Labels Standard X


6.1.2 Secondary Plant Requirements

Discipline Requirements

6.1.2.1 Protection

One new HV Feeder protection scheme with Transfer and current differential protection One 1JB0333 One 1JB0602 Cables

6.1.2.2 Control Alarms wired to IDF

6.1.2.3 Measurements Measurements transducer for HV Feeder scheme

6.1.2.4 Teleprotection Distribution to install a fibre optic cable on the line to Dwaalboom Substation





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6.2 132 kV Feeder-2 Bay (Spitskop-1)



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3-Ph, 2500A, 40kA (motorised) X


1 Inline Isolator 3-Ph, 2500A, 40kA (motorised) X



X



3 Surge Arrester 132 kV , 80 % X 31 X X

2 Line Trap X 31 X X

2 Voltage Transformer ([132√3kV][110/√3V]-[110/√3V]) X 31 X X



1 Junction Box 1JB0602 X Structure mounted



Labels Standard X




6.2.2.1 Protection

One new HV Feeder protection scheme with Transfer One 1JB0333 One 1JB0602 Cables



6.2.2.4 Teleprotection New Teleprotection equipment Two LME’s





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6.3 132 kV Feeder-3 Bay (Segoditshane-1)



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3 Isolator ( Conventional )

3-Ph, 2500A, 40kA (motorised) X 31 X X Steel Support by supplier

1 Inline Isolator 3-Ph, 2500A, 40kA (motorised) X 31 X X Steel Support by supplier


X 31 X X Steel Support by supplier


3 Surge Arrester 132 kV, 80 % X 31 X X








Labels Standard X




6.3.2.1 Protection

One new dual impedance EHV Feeder protection scheme with Transfer One 1JB0333 One 1JB0602 Cables








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6.4 132 kV Feeder-4 Bay (Derdepoort-1) (Gaborone South)



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1 Inline Isolator 3-Ph, 2500A, 40kA (motorised) X 31 X X Steel Support by supplier



3 Current Transformer 2500A,40kA 6 Core:2 P,2 B,2 M X 31 X X Bus zone 1/1000

3 Surge Arrester 132 kV, 80 % X 31 X X








Labels Standard X




6.4.2.1 Protection

One new dual impedance EHV Feeder protection scheme with Transfer One 1JB0333 One 1JB0602 Cables




6.5 132 kV (10 MVA) Transformer 1 Bay

6.5.1 Primary Plant Requirements





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1 Transformer 132/22 kV 10 MVA Star/Delta Transformer YnD1

X 31 N/A X

2 Isolator conventional

3-Ph, 2500A, 40kA, (motorised) X 31 X X Steel Support by supplier

1 Circuit Breaker 3-Ph, 3150A, 40kA ( 1 x Mec.) three pole tripping capability


3 Current Transformer 2500A,40kA,6Core: 2 P,2 B,2 M X 31 X X Bus zone 1/1000

3 Surge Arrester 132kV, 80 % X 31 X To be mounted onto transformer

3 Post Insulators 275 kV ( C6-1175) X 31 X X

1 TDB Type-1 X X Foundation only




Labels Standard X

Quantity depends on final

design



6.5.2.1 Protection

One HV Transformer (Low MVA) protection scheme One 1JB0333 TDB Type 1 Cables


6.5.2.3 Measurements Measurements scheme configured for HV Transfomer

6.5.2.4 Teleprotection N/A





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6.6 132 kV Bus Coupler “A” Bay



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1 Circuit Breaker

3-Ph, 3150A, 40kA (3 x Mec.) Single pole tripping & ARC capability


3 Current Transformer 2500A,40kA,6Core:2 P,2 B,2 M X 31 X X Bus zone 1/1000

2 Conventional Isolator






Labels Standard X




6.6.2.1 Protection One Bus Coupler protection scheme with Transfer capabilities One 1JB0333 Cables

6.6.2.2 Control D25 for a Bus Coupler

6.6.2.3 Measurements Measurements scheme configured for a Bus Coupler






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6.7 132 kV Bus Bar 1 & 2 VT Bay


Qty Equipment

For a Bus bar Specification

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6 EMVTs ([132√3kV][110/√3V]-[110/√3V]) X 31 X X Class: 0.2 – 3P


Conductor 1 x Centipede

X Quantity depends on final design

Labels

X Quantity depends on final design



6.7.2.1 Protection Two 1JB0901 Cables

6.7.2.2 Control N/A

6.7.2.3 Measurements N/A






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7 22 kV YARD REQUIREMENTS

7.1 22 kV Feeder-1 Bay (Dwaalboom)



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3-Ph, 2500A, 25kA (Hand) X 25 X X Steel Support by supplier

1 Circuit Breaker 33 kV 3-Ph, 2500A, 25 kA, X 25 X X Steel Support by

supplier

3 Current Transformer 2500A,25kA, 4 Core:2 P, & ,2 M X 25 X X

3 Surge Arrester 22 kV 100 % Metal Oxide Arrester

X 25 SA’s & PI’s

shared Cap

3 33 kV Post Insulators

C4-200 X 25 X X SA’s & PI’s

shared Cap

Conductor 1 x Centipede X


Labels Standard X




7.1.2.1 Protection One Rural feeder protection scheme One 1JB1700 structure mounted JB Cables


7.1.2.3 Measurements Measurements transducer for Rural feeder






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7.2 22 kV Transformer Bay-1



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1 Circuit Breaker 33 kV 3-Ph, 2500A, 25 kA, X 25 X X Steel Support by supplier

3 Current Transformer 2500A, 25 kA,4 Core:2 P,&,2 M X 25 X X

1 NEC/NER/Aux Trfr 22/0.4 kV, 360 A, 315 kVA X 31 X X


X 25 X

3 x To be mounted onto transformer & 3x on support

Conductor 1 x PVC Centipede & Bull X


Labels Standard X Quantity depends on final design



7.2.2.1 Protection Protection scheme included under 6.5.2 One 1JB1700 structure mounted JB Cables

7.2.2.2 Control Included under 6.5.2

7.2.2.3 Measurements Included under 6.5.2

7.2.2.4 Teleprotection Included under 6.5.2





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7.3 22/0.4 kV Auxiliary Transformer Bay-2



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1 Circuit Breaker 33 kV 3-Ph, 2500A, 25 kA, X 25 X X Steel Support by supplier

3 Current Transformer 2500A, 4 Core:2 P,&,2 M X 25 X X

1 Aux. Transformer 22 kV / 0.4 kV 315 kVA Dyn11 Aux Transformer

X 31 X X


X 25 SA’s & PI’s shared Cap

3 33 kV Post Insulators

C4-200 X 25 X X SA’s & PI’s shared Cap

1 TDB TDB Type 1 X X Foundation only

Conductor 1 x Centipede X Quantity depends on final design

Labels Standard X




7.3.2.1 Protection

One Bus Coupler Protection scheme modified for Transformer protection One 1JB1700 structure mounted JB One TDB Type 1 Cables


7.3.2.3 Measurements Measurements Transducer normally used for an HV Feeder






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8 COMMON YARD REQUIREMENTS

8.1 Auxiliary/Construction Supply To be supplied i.e. 22/0.4 kV (315 kVA at 400 V)

8.2 AC Reticulation One AC Board Type 1; Three Plug Boxes; Cables;

8.3 Busbars Conductor Strung

22 kV

1 x Bull conductor, 22 kV Main Steelwork & related hardware

Post

insulators

132 kV 42 ( C8-550 ) on Steel supports & Φ200 x 6 WT Al Tubular Conductor

22 kV No B/B PI’s are utilised

8.4 Insulators Glass & Composite

8.5 Portable Earthing Required for both yards

8.6 Overhead Earth Wire Required

8.7 Labels Busbar labels Required

Safety labels Required

Phasing discs Required

8.8 Eskom Telecoms Microwave Tower 75m,

5 Port Wave guide entry

Overhead racking for the waveguide

Cisco router.

Telephone switch

Microwave Radio Equipment

Bandwidth Management equipment.

Fibre Optic Terminal Equipment

3 (600 x 600) Cabinets

ADM

EAS Unit

PABX & telephones

Direct control circuits

D400 circuits

Disturbance Recorder circuit

TWS Recorder Circuit

8.9 Operating Floodlighting/ Security

Lighting Required

8.10 Safety & Security Standard non- lethal fence with Access gate and all associated equipment required





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8.11 Control &

Battery Room

Protection One Low Impedance Buszone scheme

Disturbance Recorder

TWS recorder

Control D400

D20

2 x FSP

Patch Panels

Gateway switch 2100

Fibre Optic Cables

IDF Equipment

IHMI

Telecom cables

Teleprotection Included in Bay equipment (May be replaced due to OPGW installation)

Metering Three meter point scheme - on the BPC lines and 132/22kV Transformer.

Stats metering (x2) on the other two 132kV lines

DC

Systems

110V DC 110V DC Batteries and stands

Dual Chargers

Dual Boards

50V DC 50V DC Batteries and stands

Dual Chargers

Dual Boards

Under-frequency load

shedding UFLS scheme is not required

Office Furniture Required

8 RELATED PROJECTS

Waterberg GX Int F/L Management Plan – Spitskop

Spitskop n-1 500MVA 400/132/22kV Transformers 41 & 42 replacement





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9 SPECIAL PROJECTS

9.1 Gaborone South – 132kV Dwarsberg Switching Station Feeder bay (Dwaalboom Substation)



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2 Line Trap X X 31 Use existing

structures

2 Voltage Transformer ([132√3kV][110/√3V]-[110/√3V]) X X 31 Use existing

structures

Labels Change Labels X X

Quantity depends on final design, Label may be changed

9.1.2


9.1.2.1 Protection Interface to new Teleprotection Equipment

9.1.2.2 Control Existing (Possible change of database)

9.1.2.3 Measurements Existing






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9.2 Segoditshane – 132kV Dwarsberg Switching Station Feeder bay (Spitskop)



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2 Line Trap X X 31 Use existing

structures

2 Voltage Transformer ([132√3kV][110/√3V]-[110/√3V]) X X 31 Use existing

structures

Labels Standard X X




9.2.2.1 Protection Interface to new Teleprotection Equipment

9.2.2.2 Control Existing (Possible change of database)

9.2.2.3 Measurements Existing






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9.3 Dwaalboom DX Substation 132 kV Dwarsberg Switching Station Feeder Bay (Derdepoort)



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2 Line Trap X X

Conductor 1 x Bull X X


Labels Standard X X




9.3.2.1 Protection One new DX HV Feeder protection scheme without Transfer and current differential protection One CTJB (Structure Mounted) Cables



9.3.2.4 Teleprotection Distribution to install a fibre optic cable on the line to Dwaalboom Switching Substation





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Revision Control

DWARSBERG SWITCHING SUBSTATION: ASSET SPECIFICATION

REV NO DESCRIPTION RESPONSIBLE DATE

0 Initial scope of work Scharrett Buchner 21/09/2013

PTM&C initial scope of work Jan Calitz 28/10/2013

1 Removed E /Switches from 132 kV Isolators and added 275 kV PI’s in 132 kV Trfr-1 Bay

Scharrett Buchner 08/05/2014

1 PTM&C revised scope of work Jan Calitz 22/05/2014

2 PTM&C removed EHV Feeder schemes & added QOS meter.

Jan Calitz 01/12/2014

2 Removed all buildings except (Control and Access control buildings) & revised PI quantities

Scharrett Buchner 11/12/2014





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COMPILED BY:

DISCIPLINE NAME DATE SIGNATURE

Substation Engineering – Electrical Scharrett Buchner 30-01-2015 Page-24

Substation Engineering – Civil Dawie Senekal 30-01-2015 Page-24

Substation Engineering – Lighting, HVAC & AC Reticulation

Anton Naude 30-01-2015 Page-24

PTM&C Engineering Jan Calitz 18-12-2014 Page-24

REVIEWED AND ACCEPTED BY:

DISCIPLINE NAME DATE SIGNATURE

Project Originator Kabir Singh 27-05-2015 Page-24

Project Manager Manqoba Nkosi 27-05-2015 Page-24

Substation Engineering Derrick Delly 03-02-2015 Page-24

HV Plant Engineering Sibongile Maphosa 04-06-2015 Page-25

PTM&C Engineering Leon Kotze 29-05-2015 Page-24

System Operations Comfort Masike 28-05-2015 Page-24

Operating Unit HV Plant Calvin Bongwe 24-06-2015 Page-26

Safety and Risk Management Willem Bosh 26-06-2015 Page-27

AUTHORISED BY:

NAME DATE SIGNATURE

Substation Engineering DRT Chairperson





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Substation Asset Specification Effective Date 10 Sep … Spec... · 132/22 kV Switching Substation...

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Transcript of Substation Asset Specification Effective Date 10 Sep … Spec... · 132/22 kV Switching Substation...