South West Scotland Forum - SPEnergyNetworks...South West Scotland Forum 8th June 2017 SWS Developer...

www.spenergynetworks.co.uk 1SWS Developer Forum 8th June 2017

South WestScotlandForum

8th June 2017


Agenda

• Introduction – Pearse Murray

• System Design – Diyar Kadar

• Programme Update – Bob McGuire, Colin Brown

• Group Discussion – Cornel Brozio

• Questions – Pearse Murray


SWS DeveloperForum

SPT System Design

Diyar Kadar

8th June 2017


Generation Background – Change from last forum

Four new wind farms connected to the system (Kilgallioch, Glen App, Airies, Ewe Hill and other smallerembedded generation)

Total generation (Connected and Contracted) in the whole of South West Scotland is around 2900MW

Not a significant change in the consented position and in excess of 1GW remains unconsented

Connected27%

Contracted &consented

32%

Contracted &not consented

41%

Generation Status in SWS - October 2016

Connected40%

Consented &Contracted

22%

Contracted &Not Consented

38%

Generation Status in SWS - June 2017


Baseline system in SWS

No change in the baseline systemdesign (Stages 1 to 4).


Future Developments - SWS

Creating Board C at New Cumnock including two new275/132kV 240 MVA transformer SGT1C & SGT2C

(TORI 158)

Creating Board B at New Cumnock including one new275/132kV 240 MVA transformer SGT2B

(TORI 213)

Creating a new 132kV GIS substation at Glenglass

(TORI 173)

Various Load Management Schemes to maximiseutilisation of the system

(TORI 148, TORI 149, TORI 176, TORI 177, TORI 186, ..)

Creating a new circuit North of Kendoon

(TORI 211)

Extending the 132kV network from Margree Teeto Glenlee and Tongland (KTR Project)

Despite all these reinforcements the system isat full capacity against contracted position


Future Developments – Wider system

KILS4

KILS2

COYL1

STHA4

ELVA4

GRNA4

MOFF4

HARK4

COYL2

NECU2

MAHI2

AUCC2

NECU1B

NETS1

GLLU1 TONG1

DUMF1 CHAP1

10

00

MV

A

12

0M

VA

12

0M

VA

240MVA

240MVA

240MVA

24

0M

VA

24

0M

VA

GRNA1

24

0M

VA

24

0M

VA

MOFF1

24

0M

VA

24

0M

VA

Cu

rle

w9

23

MV

A

Tw

inD

rake

15

00

MV

A

240MVA

L7T

win

UP

AS

35

2M

VA

Tw

inR

ub

us

11

10

MV

A

XY

Ro

ute

~1

5km

WA

Ro

ute

~1

5km

YY

Ro

ute

~5

0km

~2

5km

Nro

ute

~3

kmP

L16

LYN

X8

9M

VA

BT

Ro

ute

~2

2km L1

LYN

X8

9M

VA

Rro

ute

~3

3km

L132 Zebra 144MVA

BR Route ~ 27km

PL16 LYNX 89MVA

AL Route ~ 14km

Twin Rubus 1680MVA

ZV Route ~ 125km

Twin

Ru

bu

s1

68

0M

VA

ZVR

ou

te~

12

5km

Tw

inR

ub

us

16

80

MV

A

ZV

Ro

ute

~1

25

km

Tw

inR

ub

us

16

80

MV

A

ZVR

ou

te~

12

5km

Twin Totara 1500MVA

XV Route ~ 36km

1490MVA

XB/ZP Route ~ 59km

10

00

MV

A

NE

CU

1A

BLAH1 GLGL1L7 Twin UPAS 352MVA L7 TOTARA 220MVA

~ 13km

HUER4

HVDCTo Deeside

2.2GW

PL1

6LY

NX

89

MV

A

BG

Ro

ute

~3

0km

PL1

LYN

X8

9M

VA

PL1 LYNX

GLLE1

Rro

ute

~8

km

~ 15km

Ru

bu

s5

04

MV

A

YY

Ro

ute

~1

5km

HARK1

HARK2

PL1

LYN

X8

9M

VA

T/A

KR

ou

te~

17

km

L1LY

NX

89

MV

A

SR

ou

te~

44

km

MAYB1

KILS1

2x89MVA

89MVA

CD/CG/N/X Routes ~ 23km

~ 27km

MoyleHVDC

COAL4

COAL1

24

0M

VA

24

0M

VA

MARG1 BLCG1UPAS 176MVA

~ 10km

124MVA

KEOO1

132kV System

275kV System

400kV System

Solid line denotes OHL

Dotted line denotes cable

Kilmarnock South

Kilmarnock South

Coylton

STHA4

COAL4

ELVA4

Gretna

Moffat

Harker

Coylton

NewCumnock

MarkHill

Auchencrosh

NECU1B

NewtonStewart

Glenluce Tongland

Dumfries Chapelcross

COAL1

24

0M

VA

24

0M

VA

10

00

MV

A

10

00

MV

A

12

0M

VA

12

0M

VA

240MVA

240MVA

240MVA

24

0M

VA

24

0M

VA

24

0M

VA

Gretna

24

0M

VA

24

0M

VA

MOFF1

24

0M

VA

24

0M

VA

MoyleHVDC

Cu

rle

w9

23

MV

A

KILS1

Tw

inD

rake

15

00

MV

A

240MVA

L7T

win

UP

AS

35

2M

VA

Twin

Ru

bu

s1

11

0M

VA

XY

Ro

ute

~1

5km

WA

Ro

ute

~1

5km

YYR

ou

te~

50

km

~2

5km

PL1

6LY

NX

89

MV

A

BT

Ro

ute

~2

2km

L4P

op

lar

12

4M

VA

~3

3km

L132 Zebra 144MVA

BR Route ~ 27km

PL16 LYNX 89MVA

AL Route ~ 14km

Twin Rubus 1680MVA

ZV Route ~ 125km

Tw

inR

ub

us

16

80

MV

A

ZVR

ou

te~

12

5km

Tw

inR

ub

us

16

80

MV

A

ZVR

ou

te~

12

5km

Twin

Ru

bu

s1

68

0M

VA

ZVR

ou

te~

12

5km

Twin Totara 1500MVA

XV Route ~ 36km

1490MVA

XB/ZP Route ~ 59km

10

00

MV

A

NE

CU

1A

BLAH1 GLGL1L7 Twin UPAS 352MVA L7 TOTARA 220MVA

~ 13km

Hunterston

HVDCTo Deeside

2.2GW

BG

Ro

ute

~3

0km

Kendoon

Glenlee

~ 15km

Ru

bu

s5

04

MV

A

YY

Ro

ute

~1

5km

Harker

Harker

PL1

LYN

X8

9M

VA

T/A

KR

ou

te~

17

km

MARG1 BLCG1UPAS 176MVA

~ 10km

124MVA

L7

~1

1km

Maybole

KILS1

2x89MVA

89MVA

CD/CG/N/X Routes ~ 23km

~ 27km

PL1

6H

TLS

25

0M

VA

L7T

win

UP

AS

35

2M

VA

~ 3km

B&Q Hill

LONG

132kV System

275kV System

400kV System

Margree Tee

Solid line denotes OHL

Dotted line denotes cable

Kendoon North Tee

Major reinforcementsin Kimarnock South

Extension of the networkfrom New Cumnock to

Glenle and then toTongland (KTR project)

NE

CU

1C

240MVA

240MVA


Future System – Challenges

System uncertainties are still significant and the contracted position continuously changing

The proposed future system does not provide sufficient transmission capacity for the contractedgeneration

The proposed future system is not compliant with the NETS-SQSS against the contracted position

Derogation against non-compliant parts of the network will be sought from Ofgem

Non-build solutions, such as LMS/ANM systems, will be progressed to allow maximum utilisation ofthe system

NGET with the support of SPT will ensure developers are not commercially disadvantaged


Baseline system developments in SWS are progressing as originally designed and as per ourRIIO T1 plans.

Further reinforcements are planned at New Cumnock, Glenglass, Kilmarnock South andDumfries and Galloway to provide further transmission capacity

Against a contracted position the system in non-compliant and derogations will be requested

Reinforcement options will continuously be assessed to ensure the system is developed in acoordinated manner

In Summary


SWS DeveloperForum

Delivery Update

Bob McGuire

8th June 2017


SP-RI-142 Kilmarnock South – Coylton 275kV (XY Route) Uprating

• Uprating of Coylton to Kilmarnock South Circuits

• Current rating 600MVA

• New rating 1500MVA

• New twin Drake ACCR Conductor

• Selected OHL tower foundation upgrades

• New GIB compound at Chiperlagan

• Works Complete


SP-RI-142 Kilmarnock South – Coylton 275kV (XY Route) Uprating


Stage 2 New Cumnock – Blackhill

Stage 3 Blackhill - Glenglass

Progress since Nov 2016 SWS Developer Forum

SWS Project Progress (Stages 2 – 4)

Land Agreements: Previously secured.

Wayleaves / Servitude: Previously secured.

Consent Discharge: Previously secured.


Stage 4 New Cumnock - Margree

Progress since Nov 2016 SWS Developer Forum


Land Agreements: Previously secured.

Wayleaves / Servitude: Target indicated at for last forum was completion by Nov 2016 of remainingagreement for 7 towers.

Actual: 1 x servitude concluded in April for 7 towers .

Consent Discharge: Previously completed.

Actual: ECU / D&G consent agreed to construct OHL bypass through Margree dueto revision of connection dates and revised programme for Margeesubstation.

Rights for additional land at Dalshangan cable compound to be secured.


Stage 2 New Cumnock – Blackhill

Stage 3 Blackhill - Glenglass

Stage 4 New Cumnock - Margree


Network Overview Diagram

• £138m expenditure to date (£23m since Jan 17)

• Increase in 2017 expenditure total circa £47m

• Steel tower overhead line main construction inprogress: 69% accesses complete

49% foundations complete36% tower erection complete26% conductoring complete

• Tree cutting works in progress 95% routecorridors cleared / 732 Hectares felled / mulched

• Dunhill substation works complete

• Blackhill and Glenglass Substation electricalinstallation works substantially complete


SWS Project Progress (Stages 2 – 3) New Cumnock - Blackhill - Glenglass

• Route B completion to Dunhill in June

• Substation electrical installation phases substantially complete

• Cabling construction contracts in progress for New Cumnock /Blackhill and Glenglass substations

• Q2 2017 for completion of SPT-RI-114 / 145 infrastructure toDunhill

• Q3 2017 for completion of SPT-RI-115 / 116 infrastructure toBlackhill substation

• Q3 2017 for completion of SPT-RI-022 infrastructure to Glenglasssubstations

• Energisation of customer connections Q3/4 2017 Blackhill /Glenglass Substations in line with current contract dates


SWS Project Progress (Stage 4) New Cumnock - Margree - Blackcraig

• Transformers deliveries re-scheduled for New Cumnock in June(Route D)

• Substation electrical installation phase substantially complete.

• Site construction works commenced on Heavy Duty Wood Pole(Route D).

• Tendering completed for Route D cabling works civil workscontract awarded / cable supply contract award in progress.

• Q3 2017 for completion of SPT-RI-111 infrastructure

• SPT-RI-034 Margree collector substation now likely 2019/20 buildoverhead line through construction being progressed

• Energisation of customer connections Q3 beyond Margree in linewith current contract dates


SWS Project (Stages 2 – 4) Key Risks Remaining

• Construction activities through Afton Reservoir water catchmentarea.

• Contractor health and safety / rate of progress performance.

• Environmental performance / compliance across all works

• Network Outage availability to facilitate final connections.

• Resolution of remaining private water supply issues.

• Resolution of remaining land agreement changes.


SWS Tree Cutting Progress


SWS Project New Cumnock


SWS Project Dunhill Substation


SWS Project Route B


SWS Project Blackhill


SWS Project Route C


SWS Project Glenglass / Route C


SWS Project Glenglass


SWS Project Route D


TORI 143 – Kilmarnock South UpratingConstruct new 275kV and 400kV GIS Substation and Installation of a third 1000MVA 400/275kV auto wind transformer

• Construct new 275kV and 400kV GIS Substation and Installation of a third 1000MVA 400/275kV autowind transformer

• Planned Completion Date November 2019


TORI 143 – Kilmarnock South Uprating Project ProgressConstruct new 275kV and 400kV GIS Substation and Installation of a third 1000MVA 400/275kV auto wind transformer

• Civil enabling works substantially complete – platform available for construction of GISbuildings

- 80,000m3 of excavation- 58,000m3 of disposal- At peak 320 wagon movements per day (160 return journeys)- 1.3kM of palisade fence

• GIS building contract works commenced early 2017 – good progress being made

• Balance of Plant and 275kV cable contracts in closing stages of tender process

• Civil works commenced – SGT6 area

• OHL contractor on site to suit outage works

• Target to get 275kV & 400kV GIS Buildings substantially complete for November 2017

• Overall programme on track for completion in 2019


TORI 143 – Kilmarnock South Uprating


Transmission Programmes

South WestScotland Forum

SPT Development

Colin Brown

8th June 2017

To Maybole

Kilmarnock South toCoylton 3rd Circuit –No Longer Required

Coylton toMaybole OHLUprating

ReducedKendoonNorth132kVSubstation -No LongerRequired

Glenglass DoubleBus Substation

NewCumnockExtension

Kilmarnock SouthUprating now indelivery

CoyltonTransformersUprating

SGT2B NewCumnock

Coylton to NewCumnock WA routeUprating – NoLonger Required


Current layout of New Cumnock Substation

with TORI 213 works highlighted

TORI 213 – SGT2B New Cumnock

At New Cumnock 275kV substation

• Install a new 275/132kV 240MVAtransformer

• Cabling work to connect to New Cumnock132kV Board B

At New Cumnock 132kV Board B

• Install three new 132kV circuit breakers totee in the new transformer.

Contracted generation 297MW with 59.5MWconsented. This will be progressed as nonsecured works as part of the Kendoon toTongland (KTR) project.

Target completion date Q4 2022


TORI 158 - New Cumnock Substation Extension

• Extend double bus bar to create Board C and install 2 new 275/132kV 240MVA units (SGT1C andSGT2C)

• Contracted generation of 372MW with 51MW consented

• Following changes to the contracted background target completion date is now Q4 2021


Sealing end tower south of Coylton substation

TORI 146 – Coylton to Maybole Circuit Uprating

• Following changes to contractedbackground, technical solution has beenupdated

• Re-conductor 23km of existing 132kVdouble circuit overhead tower line

• Replace existing sections of 132kV cableto increase the rating and match the newoverhead line conductor

• Contracted generation is 85.9MW with30MW consented

• Target completion Q3 2022


The diagram below shows the Coylton240MVA SGT1(2) units installed, alongwith the wider transmission networkassociated with Maybole and CoyltonGSPs. (N.B. This is shown post theremoval of the Kendoon to Maybole T132kV circuit, scheduled to be completedas part of SPT-RI-111 in October 2017).

TORI 224 Coylton SGT1(2) Reinforcement

At Coylton 275/132kV substation:• Decommissioning and removal of the

existing Coylton SGT1(2) 275/132kV120MVA transformers

• Installation of two 275/132kV 240MVAtransformers SGT1(2)

• 85.6MW currently contracted with 30MWconsented

• Target completion date September 2022

SGT2240MVA

S10

L50L40

L25 L35L65

SGT1 240MVA

To Meadowhead

To Hunterston To Strathaven

To Hadyard Hill(99.9MW)

Grid1 Grid2

120 220 320

Grid1 Grid2

120380 280

1305 805

F25

SGT4

205

105SGT1

SGT2

F75 F35

H20 H85

To Ayr

Kilmarnock South

Coylton( )

Maybole

X120

No. 1 No. 2

( )

Contracted/Connectedembedded generation

( )

Pre-fault summer rating of89MVA

Pre-faultsummerratingof89MVA

( )

CoyltonGSP

Embedded Generation

Transformersto be upratedat Coylton


Project Progress (Stage 5 and Beyond)

TORI 173 - Glenglass Double Busbar Substation

• At the proposed Glenglass 132kV Substation, install a new 132kV GIS double busbarsubstation with eight bays.

• Continually reviewing design requirements based the contracted background

• Contracted capacity of 277.4MW contracted with 51MW consented

• Original completion date of October 2020 however, based on contracted background changes,new target completion date of October 2021


SW Scotland Developer Forum

Harmonic VoltageDistortion

8 June 2017


Introduction

• Harmonic compliance can be a problem for Users and TO’s

• In this presentation we’ll look at:

• Harmonic voltage distortion in networks and SWS

• Resonance

• Why are harmonics a problem?

• Existing compliance approach

• Issues with existing approach

• Possible alternative for SWS

Harmonic Voltage Distortion in SWS


What affects the harmonics at the Connection Point?

Harmonic Voltage Distortion in Networks

1. Transmission network

2. Background harmonics

3. Windfarm network

4. Harmonics generated bywindfarm

These change constantly

More issues as renewables increase

NetworkImpedanceExisting

(Background)HarmonicVoltages

WindfarmNetwork

HarmonicCurrents

Generatedby Windfarm

ConnectionPoint

1

23

4


• Mainly power electronic converters and devices

• HVDC converters

• Mobile phone chargers

• Windfarms

• Transformer magnetisation

• Also

• Arc furnaces

• Fluorescent lighting

Where do harmonics come from?

Why are there background harmonics?



Harmonic Resonance

• Cause of many compliance issues

• Transmission and windfarmnetworks work together

• Amplification of background harmonics

• More problems in networks that

• are weaker

• use more cable

• Studies show high resonance riskin SWS network



Why don’t we just ignore harmonics?

• Increasing risk of interference ordisturbance

• Network and User equipment

• Heating (losses)

• Life Reduction

• Communication

• Zero-crossing detection

• Noise



Existing Approach

• The User is responsible for harmonic compliance

• Network studies

• Network data

• Background measurements from TO

• Marginal non-compliance can be resolved bymeasurement

• Measurements to confirm compliance

Harmonic Compliance


Issues with Existing Approach 1

• Network does not exist – background measurements notavailable

• High level of uncertainty around final network design

• Windfarm design and harmonic emissions not known

• Data confidentiality

• Engineering Recommendation G5/4 sequential process

• How to apportion headroom fairly?

Harmonic Compliance



• Windfarm non-compliance risk

• Potential impact on reactive power range

• Inefficient mitigation

• Filter redundancy

• Mitigation costs may not be distributed equitably between Users

Harmonic Compliance



Transmission Owner• Background not from new windfarm

• Cable circuits

Harmonic Compliance

Windfarm• Cables part of the resonant circuit

Who is responsible in case of a network resonance?

Before connection After connection



Who is responsible in case of a network resonance?

Harmonic Compliance


We’ve had some ideas

• NIA project to consider a standard 33kV harmonic filter design

• Can be included in connection offer

• Not the most efficient solution

• Report and paper available

• SWS harmonic study is in progress

• Economic and efficient solution for the whole area?

• Considers uncertainties

• Considers evolving network

Harmonic Compliance Problems


Possible Alternative for SWS

• SPEN designs and installs harmonic mitigation

• Windfarms can connect without harmonic compliancerequirements if

• Harmonic currents are not unusually high

• Total cable capacitance is within a certain range

• Commercial framework?

• Initial cost estimate

• £6k – £9k/MW

Harmonic Compliance


Nearly done…

• Next Steps

• Complete SWS studies and share results

• Improve cost estimate

• Commercial arrangements

• Your views on SPEN designing and installing harmonic filtersin SWS?

• Any questions on harmonics?

Harmonic Voltage Distortion in SWS


Any Questions?

South West Scotland Forum - SPEnergyNetworks...South West Scotland Forum 8th June 2017 SWS Developer...

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