kinardochy substation - ssen transmission · substation is connected within the tummel bridge area....
TRANSCRIPT
Who we are
In total we maintain about 5,000km of overhead lines and underground cables – easily enough to stretch across the Atlantic from John O’Groats all the way to Boston in the USA.
Our network crosses some of the UK’s most challenging terrain – including circuits that are buried under the seabed, are located over 750m above sea level and up to 250km long.
The landscape and environment that contribute to the challenges we face also give the area a rich resource for renewable energy generation. There is a high demand to connect from new wind, hydro and marine generators which rely on Scottish and Southern Electricity Networks to provide a physical link between the new sources of power and electricity users. Scottish and Southern Electricity Networks is delivering a major programme of investment to ensure that the network is ready to meet the needs of our customers in the future.
Our responsibilities
We have a licence for the transmission of electricity in the north of Scotland and we are closely regulated by the energy regulator Ofgem.
Our licence stipulates that we must develop and maintain an efficient, co-ordinated and economical system of electricity transmission.
What is the difference between Transmission and Distribution?
Electricity Transmission is the transportation of electricity from generating plants to where it is required at centres of demand. The Electricity Transmission network, or grid, transports electricity at very high voltages through overhead lines, underground cables and subsea cables. Our transmission network connects large scale generation, primarily renewables, to central and southern Scotland and the rest of Great Britain. It also helps secure supply by providing reliable connection to the wider network of generation plants.
The Electricity Distribution network is connected into the Transmission network but the voltage is lowered by transformers at electricity substations, and the power is then distributed to homes and businesses through overhead lines or underground cables.
Overview of Transmission Projects
We are Scottish and Southern Electricity Networks, operating under licence as Scottish Hydro Electric Transmission Plc (SHE Transmission) for the transmission of electricity in the north of Scotland.
Western Isles
Scottish Power Energy Networks
Project need and overview
The power flow on the Beauly – Denny overhead line (OHL) is expected to increase over the next 10 years as more generation connects on the wider system; namely generation towards the west coast, north of Beauly substation and in and around Caithness.
Connecting generation can cause changes to the voltage levels along affected circuits. These changes could mean the network, without intervention, would not meet the voltage requirements set out within the National Energy Transmission System Security and Quality of Supply Standard (NETS SQSS).
Our network and system studies have shown that currently contracted generation will cause such a change, within the Tummel Bridge area, and will require reactive power support to be installed to maintain voltage levels under a number of different system operating scenarios. Reactive power support helps the system by ensuring the voltage levels stay within the required limits and assists in the continuation of the quality and supply of electricity across the network.
To ensure safe, efficient and coordinated operation of our network , it is proposed that a new reactive power substation is connected within the Tummel Bridge area.
Project overview Main elements
This transmission connection will be known as the Kinardochy Substation. The works will comprise:
• Forestry felling for the substation compound.
• Temporary works including a construction compound, laydown and welfare area.
• Formation of a substation compound, access track and appropriate landscaping to allow for installation of:
- Reactive power equipment. - A Mechanically Switched Capacitor with Dampening
Network (MSCDN). - A double busbar arrangement.
• Other electrical infrastructure required to facilitate connection of the substation.
• Dismantling of one OHL tower and replacement with two similar towers to permit a turn in arrangement of the circuits.
Project timeline
Summer 2019
Autumn 2019 Early 2020 Spring 2021
Undertake a wide range of consultation
Pre-application consultation events
Construction commences
Review of consultation feedback
04 www.ssen-transmission.co.uk/projects/kinardochy-substation
Kinardochy Substation
Project completion
Kinardochy substation site selection
We carried out an assessment on potential substation site locations against technical, environmental and cost considerations.
Nine potential substation site locations were initially identified based on proximity to the existing electricity infrastructure, access requirements, and potential environmental constraints. The same substation design and required size of site was used to allow a comparative assessment of the sites to be undertaken. The criteria used in the assessment included the following:
Environmental considerations
Geology and soils, hydrology, ornithology, protected species, habitats, cultural heritage, landscape character, visual amenity, land use, access and recreation, traffic and transport, and noise.
Technical considerations
River Tay
Cairngorms Massif
Loch Tummel
Balnaguard Glen
Bolfracks Wood
BJR
LT000096_ENV_003_Landscape
Legend
Special Protection Area (SPA)
Conservation Areas
0 1 2 3 40.5 km
Reproduced by permission of Ordnance Survey on behalf of HMSO. Crown copyright and database right 2019 all rights reserved. Ordnance Survey Licence number 0100019808.
Existing Tummel 275kV Substation
Existing Errochty 275kV Substation
Based on these criteria site 1 and site 4 were identified as the least constrained and taken forward for further detailed appraisal as part of the site selection process.
Kinardochy substation site selection
06 www.ssen-transmission.co.uk/projects/kinardochy-substation
Kinardochy Substation
Potential substation site 1: Is close to the existing operational substation, although some potential space restrictions were identified, it was considered that developing an existing site presented some opportunities. This site location was taken forward for further assessment.
Potential substation site 2: The area surrounding the existing Errochty Substation is very constrained by existing land features / infrastructure e.g. river Tummel, B846, nearby properties, and did not provide the space needed for the new substation. This site location was discounted from further assessment.
Potential substation site 3: The area surrounding site 3 has significant ecological value and peat land, is located a distance away from the Beauly – Denny OHL, meaning significant diversion of this OHL would be required. This site location was discounted from further assessment
Potential substation site 4: The site is not confined in terms of space and is near to the existing OHL. This site location was taken forward for further assessment.
Potential substation site 5: Is in close proximity to Tombreck cottage and would require significant access upgrade works. This site was discounted from further assessment.
Potential substation site 6: The area is next to a campsite and recreational activities, which could have potential significant visual and noise impacts. This site was discounted from further assessment.
Potential substation site 7: This site is in a flood plain and could have potential significant visual impacts related to users of the main road (B846). This site was discounted from further assessment.
Potential substation site 8: Access requirements to this site would be significant and would be potentially inaccessible during the winter months due to the altitude. This site was discounted from further assessment.
Potential substation site 9: Access requirements for this site would be significant and would be potentially inaccessible during the winter months due to the altitude. This site was discounted from further assessment.
Initial site assessment
Site 1 and site 4 were taken forward for further assessment, including site walkovers and surveys, transport, ground conditions and environmental assessments and technical assessments related to connecting the new substation equipment to the existing electricity network. During this stage, site 1 and 4 were comparatively reviewed against the environmental, technical and operational considerations detailed above. An economic appraisal was also undertaken. Following this assessment work, and balancing all the considerations, site 4 was identified as the preferred site for the required new substation. The main points which determined the preferred site are as follows:
• Site 4 was favoured due to the relative size of the site when compared with site 1.
• Site 4 has reduced health and safety considerations during construction (site 1 is adjacent to an existing live substation and aqueduct).
• Site 4 will involve less work on the existing overhead line (OHL) resulting in the requirement for fewer additional towers to achieve connection.
• Site 4 is less constrained by existing development which would negate any future expansion requirements.
• Site 4 is marginally favoured as it is further away from the River Tay Designated Special Areas of Conservation (SAC), has fewer protected species opportunities, the required OHL works are further away from existing residential properties, and there is likely to be less felling requirement; and
• Site 4 is marginally more economic due to the reduced required works on the existing OHL.
Detailed site selection
Preferred site
The preferred substation site (site 4), located to the south of Tummel Bridge, near Loch Kinardochy, provides an appropriate location for installation for the reactive power substation. The site is near to the Beauly – Denny overhead line, permitting a turn in arrangement of the circuits into the site.
The platform area will include a control building and up to two other buildings to house electrical infrastructure. The location of the site has been identified as providing the least constrained in terms of engineering and environmental aspects.
A new access will need to be formed from the public road to access the site. At the moment a number of access points are being explored. This could include forming a new access off Schieallion Road. Other potential accesses could be provided from the B846 and will be concluded following further studies. The platform area will be surrounded by a palisade fence for security purposes. Felling will be required to facilitate the development and studies to determine the extent of these works are currently underway.
Temporary compound/laydown area(s) will be required during construction. Three potential options are shown on the adjacent site location plan.
Overhead line alterations will be required in order to tie in to the proposed substation.
75 1
CONTRACTOR/LAYDOWN AREA OPTION 3
OHL TO ERROCHTY
EXISTING OHL TOWER
0m
375m250m125m 500m
NOTES:- 1. EXISTING OHL INFORMATION TAKEN FROM GIS DATA. 2. PROPOSED SUBSTATION IS STILL AT DEVELOPMENT STAGE AND
LOCATION/ORIENTATION MAY CHANGE UPON FURTHER INVESTIGATION/DESIGN.
3. PROPOSED TOWERS SHOWN INDICATIVELY AND LOCATION/ORIENTATION MAY CHANGE UPON FURTHER INVESTIGATION/DESIGN.
4. SUBSTATION EXTENTS TAKEN FROM SSEN DRAWING NUMBER: LT96_KIND_1104_0035_00_00 - KINARDOCHY 275kV REACTIVE COMPENSATION SUBSTATION ELECTRICAL LAYOUT.
OS MAP NN75NE & NN75SE REPRODUCED BY PERMISSION OF ORDNANCE SURVEY ON BEHALF OF HMSO. CROWN COPYRIGHT AND DATABASE RIGHT 2016. ALL RIGHTS RESERVED. ORDNANCE SURVEY LICENCE NUMBER EL273236.
!!!TO BE PRINTED IN COLOUR!!!
SSE Inveralmond House, 200 Dunkeld Road Perth, PH1 3AQ, UK www.sse.com
Drawing Status:
Approved:
Checked:
Drawn:
Title:
A1 A
DOCUMENT REFERENCE:
LIST OF ALL RELEVANT DRAWINGS OR DOCUMENTS THAT DIRECTLY RELATE TO THE CURRENT REVISION OF THE DRAWING
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LT000096 TUMMEL
FOR PLANNING
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PMR
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DP
SOP1 277039 755811 TBC
SOP2 277336 755811 TBC
SOP3 277336 755604 TBC
SOP4 277039 755604 TBC
231A 276994 755660 TBC
FOR PLANNING
CAR PARKING
PROPOSED ACCESS ROAD)
PALISADE SECURITY FENCE
TBC
50 00
50 00
R2 00
PEDESTRIAN ACCESS GATE (POSITION TBC DEPENDENT ON PROPOSED ACCESS ROAD)
R20000
(SIZES BASED ON BEAULY)
DETAILS OF STATCOM TBC INDICATIVE SIZE SHOWN ONLY. (SIZES BASED ON MELGARVE)
TBC
4600
TOP = R MID= B BOT = Y
275kV OHL (EXISTING) TUMMEL-BRACO WEST [MB1] TOP = B MID= R BOT = Y
400kV OHL MELGARVE-DENNY [ELY1]
TOP = R MID= B BOT = Y
275kV OHL (EXISTING) TUMMEL-BRACO WEST [MB1] TOP = B MID= R BOT = Y
400kV TERMINAL TOWER TBC
DEER FENCE
15000 5000
APPROX. 20000 5000 5000 5000 4200 4600 4600 4600 36999 28085 4600 4600 4600 5600 15000
CTSA ESW AIS/GIB INTERFACETBC
HPIESW CVTCTAIS/GIB INTERFACE TBC
275kV GIB
5m ROAD
BUSBAR
S S 275kV GIB
HEIGHT OF STATCOM EQUIPMENT & BUILDINGS DEPENDENT ON DETAIL DESIGN STAGE
95 00
SUBSTATION MINIMUM ELECTRICAL CLEARANCES REQUIREMENTS TO BE IN ACCORDANCE WITH SSE SUBSTATION DESIGN SPECIFICATION DOC No. SP-PS-399
REF CLEARANCE (mm) NOMINAL SYSTEM VOLTAGE
400kV 275kV 132kV 33kV
S DESIGN CLEARANCE FOR SAFETY 5500 4800 3500 2900
SD SAFETY DISTANCE 3100 2400 1400 800
Ds WORKING & ACCESS CLEARANCE (VERTICAL) 5200 4500 3500 2900
Dsh WORKING & ACCESS CLEARANCE (HORIZONTAL) 4600 3900 2900 2300
IH INSULATION HEIGHT (PEDESTRIAN ACCESS) 2400 2400 2400 2400
WHERE EQUIPMENT CONFIGURATIONS HAVE NOT BEEN SUBJECT TO TYPE OF ROUTINE TESTS IN ACCORDANCE WITH IEC 60694 THE CLEARANCES FOR PHASE TO EARTH AND PHASE TO PHASE ABOVE SHALL APPLY. THEY APPLY UNDER CONDITIONS OF MAXIMUM SWING AND SAG.
WHEN DESIGNING ELECTRICAL CONNECTIONS THE FOLLOWING ALLOWANCES HAVE BEEN MADE TO COVER TOLERANCES IN ELECTRICAL AND CIVIL WORK AND THE SETTLEMENT OF FOUNDATIONS:- 132kV - 80mm; 33kV - 80mm
SSE Inveralmond House, 200 Dunkeld Road Perth, PH1 3AQ, UK www.sse.com
Drawing Status:
Approved:
Checked:
Drawn:
Title:
A0
DOCUMENT REFERENCE:
LIST OF ALL RELEVANT DRAWINGS OR DOCUMENTS THAT DIRECTLY RELATE TO THE CURRENT REVISION OF THE DRAWING
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LT000096 TUMMEL
FOR PLANNING
1:500 @ A0
!!!TO BE PRINTED IN COLOUR!!!
LEGEND:- SGT STATIC COMPENSATION TRANSFORMER ES EARTH SWITCH DISC DISCONNECTOR (RCP) DG DIESEL GENERATOR CB CIRCUIT BREAKER CSE CABLE SEALING END CVT CAPACITIVE VOLTAGE TRANSFORMER SA SURGE ARRESTER PI POST INSULATOR GIB GAS INSULATED BUSBAR H HIGH LEVEL (POST INSULATOR)
PLANT PROPOSED
NOTES:- 1. BASED ON DESIGN REQUIREMENTS TAKEN FROM KINARDOCHY
SUBSTATION DRD LT96-DRD-G1-REV1 (TBC). 2. ALL DIMENSIONS SHOWN IN MILLIMETRES (mm) U.N.O. 3. PROPOSED LAYOUT FOR PLANNING PURPOSES ONLY. 4. SITE DEVELOPED FOR POTENTIAL UPGRADE TO 400kV IN FUTURE
THEREFORE 400kV ELECTRICAL CLEARANCES HAVE BEEN USED WHERE APPROPRIATE.
5. GIS AND CONTROL BUILDING TAKEN FROM PROPOSED PETERHEAD 400kV SUBSTATION, REFER TO SSEN DRAWING NUMBERS: LT135_PEHE_0805_0001_00_00 - FOR PLANNING-400KV GIS CONTROL BUILDING GA AND LT135_PEHE_0805_0002_00_00 - FOR PLANNING-400KV GIS CONTROL BUILDING ELEVATIONS.
6. GIS AND CONTROL BUILDING FOOTPRINT ASSUMED SUITABLE FOR 275kV OR 400kV EQUIPMENT.
7. AIS PLANT INFORMATION TAKEN FROM STANDARD SSE FRAMEWORK LAYOUTS.
8. ASSUMED STATCOM TRANSFORMER LOCATED ON WEST OF STATCOM COMPOUND BUT CONNECTUON FROM GIS COULD BE MODIFIED TO ACCOMODATE A DIFFERENT TRANSFORMER POSITION.
9. CURRENTLY NO INFORMATION ON MSCDN REQUIRED AT THIS SITE. INDICATIVE SPACE ENVELOPE ONLY.
10. BUILDING OUTLINE INDICATIVE ONLY - DESIGN TO BE CONFIRMED. 11. GIS BAYS 8,9,10,11 AND 12 ARE SPACE PROVISION ONLY. GIB ENTRIES TO
BE PROVIDED. 12. OVERHEAD LINE ROUTES AND POSITION OF TOWERS (TERMINAL OR
OTHERWISE) TO BE CONFIRMED AND SUBJECT TO SEPARATE SECTION 37 CONSENT.
13. OHL REQUIRE TO BE MODELLED TO ENSURE NO INFRINGEMENT OF ELECTRICAL CLEARANCES.
14. PLATFORM DATUM, TO BE CONFIRMED. 15. ELECTRICAL PHASING TO BE CONFIRMED. 16. ACCESS ROUTE TO SITE TBC. 17. PROPOSED PLATFORM AREA = 63870m² / 15.78acres.
FOR PLANNING
Substation dimensions
• The Substation platform dimensions are approximately 302 x 212m (plus any landscaping)
• Substation building heights vary between 5.5m and 16m
Minor internal alterations to protection and control systems will also be required at the existing 275kV substation.
Environment
08 www.ssen-transmission.co.uk/projects/kinardochy-substation
Kinardochy Substation
Desk-based studies and site walkovers have been undertaken to gather data and understand the key environmental constraints and opportunities within the local area. This process has helped to identify the key environmental issues for this project to be landscape and visual amenity, habitats / hydrology and forestry. Other environmental aspects including cultural heritage, protected species, natural heritage and biodiversity will be further considered during the detailed environmental assessment.
Following confirmation of the proposed site location, further detailed studies and assessment work will be undertaken to ensure all required mitigations are fully understood and implemented during the detailed design and construction phases. Further consultation will be undertaken as part of the planning process, and appropriate supporting documentation, to include an environmental assessment report will be submitted as part of the planning consent applications.
Habitats / Hydrology
There are no sites designated for habitat conservation located in proximity to site 4, and the site contains no Annex 1 habitats under the habitats directive. Site 4 is dominated by sitka spruce plantation with a large area of unmanaged heather dominated dry heath along its western edge. The site can be waterlogged, with small pools of standing water. There are some areas of deeper peat and careful micrositing will be undertaken to avoid these areas where possible.
Landscape and visual amenity
The site lies on the transitional edge of the Highland Summits and Plateaux and Lower Highland Glens with Lochs Landscape Character Type (LCTs). The site is located within a coniferous plantation which encloses, and contrasts with, the more open reflective surface of Loch Kinardochy, which is a key focal point in the landscape situated to the south east of the site and popular for trout fishing and wildlife watching. Potential views across Loch Kinardochy, although within a short section, towards the site are available from the B846 (General Wade’s Military Road) Distant elevated views of the site are likely from some elevated locations within Loch Rannoch National Scenic Area (NSA), including Schiehallion/Breadalbane- Schiehallion Wild Land Area (WLA). A full landscape and visual amenity assessment will be undertaken and appropriate mitigation, including micrositing and landscaping will be developed.
Forestry
The site is located within an area mostly covered by coniferous woodland plantation, with a small part of it within a glade. Land use within 5 km of the site is primarily rural, with large plantation areas located at the east and west. Historical land use on the site has been the same as at present, as shown on the earliest historical maps. Felling will be required to facilitate the development.
www.ssen-transmission.co.uk/projects/kinardochy-substation
What happens now and how do I have my say?
We understand and recognise the value of the feedback provided by members of the public during all engagements and consultations. Without this valuable feedback, the project development team would be unable to progress projects and reach a balanced proposal.
We are keen to receive your views and comments in regards to the following questions:
• Has the requirement for the project been clearly explained?
• Have we explained the approach taken to select the proposed site adequately?
• Are there any additional factors, or environmental features, that you consider important and should be brought to the attention of the project team?
Comments
Your views and comments can be provided to the project team by completing a feedback form or by writing to Louise Anderson, Community Liaison Manager. We will be seeking feedback from members of the public and Statutory Bodies until the 13th September 2019.
All received feedback will be assessed and the proposed options adapted where necessary.
Additional information
Information will also be made available via the project webpage and social media channels:
Project Website: www.ssen-transmission.co.uk/ projects/ kinardochy-substation
Follow us on Twitter: @ssencommunity
Follow us on Facebook: @ssencommunity
Community Liaison Manager Louise Anderson
[email protected]
Louise Anderson Scottish and Southern Electricity Networks, 200 Dunkeld Road, Perth, PH1 3AQ
Please use space below to provide further comments:
Full name
Scottish and Southern Electricity Networks is a trading name of: Scottish and Southern Energy Power Distribution Limited Registered in Scotland No.
SC213459; Scottish Hydro Electric Transmission plc Registered in Scotland No. SC213461; Scottish Hydro Electric Power Distribution plc Registered in
Scotland No. SC213460; (all having their Registered Offices at Inveralmond House 200 Dunkeld Road Perth PH1 3AQ); and Southern Electric Power
Distribution plc Registered in England & Wales No. 04094290 having its Registered Office at Number One Forbury Place, 43 Forbury Road, Reading,
Berkshire, RG1 3JH which are members of the SSE Group.
Closing date for feedback is 16:00, Friday 13th September 2019.
The feedback form and all information provided at the event can also be downloaded from the dedicated website:
Any information given on the feedback form can be used and published anonymously as part of Scottish and Southern Electricity Networks
consultation report. By completing this feedback form you consent to Scottish and Southern Electricity Networks using feedback for this purpose.
Thank you for taking the time to complete this feedback form.
Please hand your completed form in at the event or alternatively by one of the methods below:
Post: Scottish and Southern Electricity Networks, 200 Dunkeld Road, Perth, PH1 3AQ
Email: [email protected]
Online: www.ssen-transmission.co.uk/projects/kinardochy-substation
Download: Comments forms and all the information from today’s event will also be available to download from the project website.
Address
Telephone
Email
If you would like to be kept informed of progress on the project please tick this box.
If you would like your comments to remain anonymous please tick this box.
11
Thank you for taking the time to attend this consultation event. In order to record your views and improve the effectiveness of
our consultation, please complete this short feedback form.
Please complete in BLOCK CAPITALS. (Please tick one box per question only)
Your Feedback
Q3 Are there any additional factors, or environmental features, that you consider important
and should be brought to the attention of the project team?
Q1 Has the requirement for the project been clearly explained?
Yes
Kinardochy Substation
Q2 Have we explained the approach taken to select the proposed site adequately?
Yes
11
Thank you for taking the time to attend this consultation event. In order to record your views and improve the effectiveness of our consultation, please complete this short feedback form.
Please complete in BLOCK CAPITALS. (Please tick one box per question only)
Your Feedback
Q3 Are there any additional factors, or environmental features, that you consider important and should be brought to the attention of the project team?
Q1 Has the requirement for the project been clearly explained?
Yes No Unsure
Kinardochy Substation
Q2 Have we explained the approach taken to select the proposed site adequately?
Yes No Unsure
Full name
Scottish and Southern Electricity Networks is a trading name of: Scottish and Southern Energy Power Distribution Limited Registered in Scotland No. SC213459; Scottish Hydro Electric Transmission plc Registered in Scotland No. SC213461; Scottish Hydro Electric Power Distribution plc Registered in Scotland No. SC213460; (all having their Registered Offices at Inveralmond House 200 Dunkeld Road Perth PH1 3AQ); and Southern Electric Power Distribution plc Registered in England & Wales No. 04094290 having its Registered Office at Number One Forbury Place, 43 Forbury Road, Reading, Berkshire, RG1 3JH which are members of the SSE Group.
Closing date for feedback is 16:00, Friday 13th September 2019.
The feedback form and all information provided at the event can also be downloaded from the dedicated website:
Any information given on the feedback form can be used and published anonymously as part of Scottish and Southern Electricity Networks consultation report. By completing this feedback form you consent to Scottish and Southern Electricity Networks using feedback for this purpose.
Thank you for taking the time to complete this feedback form.
Please hand your completed form in at the event or alternatively by one of the methods below:
Post: Scottish and Southern Electricity Networks, 200 Dunkeld Road, Perth, PH1 3AQ
Email: [email protected]
Online: www.ssen-transmission.co.uk/projects/kinardochy-substation
Download: Comments forms and all the information from today’s event will also be available to download from the project website.
Address
Telephone
Email
If you would like to be kept informed of progress on the project please tick this box.
In total we maintain about 5,000km of overhead lines and underground cables – easily enough to stretch across the Atlantic from John O’Groats all the way to Boston in the USA.
Our network crosses some of the UK’s most challenging terrain – including circuits that are buried under the seabed, are located over 750m above sea level and up to 250km long.
The landscape and environment that contribute to the challenges we face also give the area a rich resource for renewable energy generation. There is a high demand to connect from new wind, hydro and marine generators which rely on Scottish and Southern Electricity Networks to provide a physical link between the new sources of power and electricity users. Scottish and Southern Electricity Networks is delivering a major programme of investment to ensure that the network is ready to meet the needs of our customers in the future.
Our responsibilities
We have a licence for the transmission of electricity in the north of Scotland and we are closely regulated by the energy regulator Ofgem.
Our licence stipulates that we must develop and maintain an efficient, co-ordinated and economical system of electricity transmission.
What is the difference between Transmission and Distribution?
Electricity Transmission is the transportation of electricity from generating plants to where it is required at centres of demand. The Electricity Transmission network, or grid, transports electricity at very high voltages through overhead lines, underground cables and subsea cables. Our transmission network connects large scale generation, primarily renewables, to central and southern Scotland and the rest of Great Britain. It also helps secure supply by providing reliable connection to the wider network of generation plants.
The Electricity Distribution network is connected into the Transmission network but the voltage is lowered by transformers at electricity substations, and the power is then distributed to homes and businesses through overhead lines or underground cables.
Overview of Transmission Projects
We are Scottish and Southern Electricity Networks, operating under licence as Scottish Hydro Electric Transmission Plc (SHE Transmission) for the transmission of electricity in the north of Scotland.
Western Isles
Scottish Power Energy Networks
Project need and overview
The power flow on the Beauly – Denny overhead line (OHL) is expected to increase over the next 10 years as more generation connects on the wider system; namely generation towards the west coast, north of Beauly substation and in and around Caithness.
Connecting generation can cause changes to the voltage levels along affected circuits. These changes could mean the network, without intervention, would not meet the voltage requirements set out within the National Energy Transmission System Security and Quality of Supply Standard (NETS SQSS).
Our network and system studies have shown that currently contracted generation will cause such a change, within the Tummel Bridge area, and will require reactive power support to be installed to maintain voltage levels under a number of different system operating scenarios. Reactive power support helps the system by ensuring the voltage levels stay within the required limits and assists in the continuation of the quality and supply of electricity across the network.
To ensure safe, efficient and coordinated operation of our network , it is proposed that a new reactive power substation is connected within the Tummel Bridge area.
Project overview Main elements
This transmission connection will be known as the Kinardochy Substation. The works will comprise:
• Forestry felling for the substation compound.
• Temporary works including a construction compound, laydown and welfare area.
• Formation of a substation compound, access track and appropriate landscaping to allow for installation of:
- Reactive power equipment. - A Mechanically Switched Capacitor with Dampening
Network (MSCDN). - A double busbar arrangement.
• Other electrical infrastructure required to facilitate connection of the substation.
• Dismantling of one OHL tower and replacement with two similar towers to permit a turn in arrangement of the circuits.
Project timeline
Summer 2019
Autumn 2019 Early 2020 Spring 2021
Undertake a wide range of consultation
Pre-application consultation events
Construction commences
Review of consultation feedback
04 www.ssen-transmission.co.uk/projects/kinardochy-substation
Kinardochy Substation
Project completion
Kinardochy substation site selection
We carried out an assessment on potential substation site locations against technical, environmental and cost considerations.
Nine potential substation site locations were initially identified based on proximity to the existing electricity infrastructure, access requirements, and potential environmental constraints. The same substation design and required size of site was used to allow a comparative assessment of the sites to be undertaken. The criteria used in the assessment included the following:
Environmental considerations
Geology and soils, hydrology, ornithology, protected species, habitats, cultural heritage, landscape character, visual amenity, land use, access and recreation, traffic and transport, and noise.
Technical considerations
River Tay
Cairngorms Massif
Loch Tummel
Balnaguard Glen
Bolfracks Wood
BJR
LT000096_ENV_003_Landscape
Legend
Special Protection Area (SPA)
Conservation Areas
0 1 2 3 40.5 km
Reproduced by permission of Ordnance Survey on behalf of HMSO. Crown copyright and database right 2019 all rights reserved. Ordnance Survey Licence number 0100019808.
Existing Tummel 275kV Substation
Existing Errochty 275kV Substation
Based on these criteria site 1 and site 4 were identified as the least constrained and taken forward for further detailed appraisal as part of the site selection process.
Kinardochy substation site selection
06 www.ssen-transmission.co.uk/projects/kinardochy-substation
Kinardochy Substation
Potential substation site 1: Is close to the existing operational substation, although some potential space restrictions were identified, it was considered that developing an existing site presented some opportunities. This site location was taken forward for further assessment.
Potential substation site 2: The area surrounding the existing Errochty Substation is very constrained by existing land features / infrastructure e.g. river Tummel, B846, nearby properties, and did not provide the space needed for the new substation. This site location was discounted from further assessment.
Potential substation site 3: The area surrounding site 3 has significant ecological value and peat land, is located a distance away from the Beauly – Denny OHL, meaning significant diversion of this OHL would be required. This site location was discounted from further assessment
Potential substation site 4: The site is not confined in terms of space and is near to the existing OHL. This site location was taken forward for further assessment.
Potential substation site 5: Is in close proximity to Tombreck cottage and would require significant access upgrade works. This site was discounted from further assessment.
Potential substation site 6: The area is next to a campsite and recreational activities, which could have potential significant visual and noise impacts. This site was discounted from further assessment.
Potential substation site 7: This site is in a flood plain and could have potential significant visual impacts related to users of the main road (B846). This site was discounted from further assessment.
Potential substation site 8: Access requirements to this site would be significant and would be potentially inaccessible during the winter months due to the altitude. This site was discounted from further assessment.
Potential substation site 9: Access requirements for this site would be significant and would be potentially inaccessible during the winter months due to the altitude. This site was discounted from further assessment.
Initial site assessment
Site 1 and site 4 were taken forward for further assessment, including site walkovers and surveys, transport, ground conditions and environmental assessments and technical assessments related to connecting the new substation equipment to the existing electricity network. During this stage, site 1 and 4 were comparatively reviewed against the environmental, technical and operational considerations detailed above. An economic appraisal was also undertaken. Following this assessment work, and balancing all the considerations, site 4 was identified as the preferred site for the required new substation. The main points which determined the preferred site are as follows:
• Site 4 was favoured due to the relative size of the site when compared with site 1.
• Site 4 has reduced health and safety considerations during construction (site 1 is adjacent to an existing live substation and aqueduct).
• Site 4 will involve less work on the existing overhead line (OHL) resulting in the requirement for fewer additional towers to achieve connection.
• Site 4 is less constrained by existing development which would negate any future expansion requirements.
• Site 4 is marginally favoured as it is further away from the River Tay Designated Special Areas of Conservation (SAC), has fewer protected species opportunities, the required OHL works are further away from existing residential properties, and there is likely to be less felling requirement; and
• Site 4 is marginally more economic due to the reduced required works on the existing OHL.
Detailed site selection
Preferred site
The preferred substation site (site 4), located to the south of Tummel Bridge, near Loch Kinardochy, provides an appropriate location for installation for the reactive power substation. The site is near to the Beauly – Denny overhead line, permitting a turn in arrangement of the circuits into the site.
The platform area will include a control building and up to two other buildings to house electrical infrastructure. The location of the site has been identified as providing the least constrained in terms of engineering and environmental aspects.
A new access will need to be formed from the public road to access the site. At the moment a number of access points are being explored. This could include forming a new access off Schieallion Road. Other potential accesses could be provided from the B846 and will be concluded following further studies. The platform area will be surrounded by a palisade fence for security purposes. Felling will be required to facilitate the development and studies to determine the extent of these works are currently underway.
Temporary compound/laydown area(s) will be required during construction. Three potential options are shown on the adjacent site location plan.
Overhead line alterations will be required in order to tie in to the proposed substation.
75 1
CONTRACTOR/LAYDOWN AREA OPTION 3
OHL TO ERROCHTY
EXISTING OHL TOWER
0m
375m250m125m 500m
NOTES:- 1. EXISTING OHL INFORMATION TAKEN FROM GIS DATA. 2. PROPOSED SUBSTATION IS STILL AT DEVELOPMENT STAGE AND
LOCATION/ORIENTATION MAY CHANGE UPON FURTHER INVESTIGATION/DESIGN.
3. PROPOSED TOWERS SHOWN INDICATIVELY AND LOCATION/ORIENTATION MAY CHANGE UPON FURTHER INVESTIGATION/DESIGN.
4. SUBSTATION EXTENTS TAKEN FROM SSEN DRAWING NUMBER: LT96_KIND_1104_0035_00_00 - KINARDOCHY 275kV REACTIVE COMPENSATION SUBSTATION ELECTRICAL LAYOUT.
OS MAP NN75NE & NN75SE REPRODUCED BY PERMISSION OF ORDNANCE SURVEY ON BEHALF OF HMSO. CROWN COPYRIGHT AND DATABASE RIGHT 2016. ALL RIGHTS RESERVED. ORDNANCE SURVEY LICENCE NUMBER EL273236.
!!!TO BE PRINTED IN COLOUR!!!
SSE Inveralmond House, 200 Dunkeld Road Perth, PH1 3AQ, UK www.sse.com
Drawing Status:
Approved:
Checked:
Drawn:
Title:
A1 A
DOCUMENT REFERENCE:
LIST OF ALL RELEVANT DRAWINGS OR DOCUMENTS THAT DIRECTLY RELATE TO THE CURRENT REVISION OF THE DRAWING
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
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LT000096 TUMMEL
FOR PLANNING
1:5000 @ A1
PMR
NB
DP
SOP1 277039 755811 TBC
SOP2 277336 755811 TBC
SOP3 277336 755604 TBC
SOP4 277039 755604 TBC
231A 276994 755660 TBC
FOR PLANNING
CAR PARKING
PROPOSED ACCESS ROAD)
PALISADE SECURITY FENCE
TBC
50 00
50 00
R2 00
PEDESTRIAN ACCESS GATE (POSITION TBC DEPENDENT ON PROPOSED ACCESS ROAD)
R20000
(SIZES BASED ON BEAULY)
DETAILS OF STATCOM TBC INDICATIVE SIZE SHOWN ONLY. (SIZES BASED ON MELGARVE)
TBC
4600
TOP = R MID= B BOT = Y
275kV OHL (EXISTING) TUMMEL-BRACO WEST [MB1] TOP = B MID= R BOT = Y
400kV OHL MELGARVE-DENNY [ELY1]
TOP = R MID= B BOT = Y
275kV OHL (EXISTING) TUMMEL-BRACO WEST [MB1] TOP = B MID= R BOT = Y
400kV TERMINAL TOWER TBC
DEER FENCE
15000 5000
APPROX. 20000 5000 5000 5000 4200 4600 4600 4600 36999 28085 4600 4600 4600 5600 15000
CTSA ESW AIS/GIB INTERFACETBC
HPIESW CVTCTAIS/GIB INTERFACE TBC
275kV GIB
5m ROAD
BUSBAR
S S 275kV GIB
HEIGHT OF STATCOM EQUIPMENT & BUILDINGS DEPENDENT ON DETAIL DESIGN STAGE
95 00
SUBSTATION MINIMUM ELECTRICAL CLEARANCES REQUIREMENTS TO BE IN ACCORDANCE WITH SSE SUBSTATION DESIGN SPECIFICATION DOC No. SP-PS-399
REF CLEARANCE (mm) NOMINAL SYSTEM VOLTAGE
400kV 275kV 132kV 33kV
S DESIGN CLEARANCE FOR SAFETY 5500 4800 3500 2900
SD SAFETY DISTANCE 3100 2400 1400 800
Ds WORKING & ACCESS CLEARANCE (VERTICAL) 5200 4500 3500 2900
Dsh WORKING & ACCESS CLEARANCE (HORIZONTAL) 4600 3900 2900 2300
IH INSULATION HEIGHT (PEDESTRIAN ACCESS) 2400 2400 2400 2400
WHERE EQUIPMENT CONFIGURATIONS HAVE NOT BEEN SUBJECT TO TYPE OF ROUTINE TESTS IN ACCORDANCE WITH IEC 60694 THE CLEARANCES FOR PHASE TO EARTH AND PHASE TO PHASE ABOVE SHALL APPLY. THEY APPLY UNDER CONDITIONS OF MAXIMUM SWING AND SAG.
WHEN DESIGNING ELECTRICAL CONNECTIONS THE FOLLOWING ALLOWANCES HAVE BEEN MADE TO COVER TOLERANCES IN ELECTRICAL AND CIVIL WORK AND THE SETTLEMENT OF FOUNDATIONS:- 132kV - 80mm; 33kV - 80mm
SSE Inveralmond House, 200 Dunkeld Road Perth, PH1 3AQ, UK www.sse.com
Drawing Status:
Approved:
Checked:
Drawn:
Title:
A0
DOCUMENT REFERENCE:
LIST OF ALL RELEVANT DRAWINGS OR DOCUMENTS THAT DIRECTLY RELATE TO THE CURRENT REVISION OF THE DRAWING
21 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
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21 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
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LT000096 TUMMEL
FOR PLANNING
1:500 @ A0
!!!TO BE PRINTED IN COLOUR!!!
LEGEND:- SGT STATIC COMPENSATION TRANSFORMER ES EARTH SWITCH DISC DISCONNECTOR (RCP) DG DIESEL GENERATOR CB CIRCUIT BREAKER CSE CABLE SEALING END CVT CAPACITIVE VOLTAGE TRANSFORMER SA SURGE ARRESTER PI POST INSULATOR GIB GAS INSULATED BUSBAR H HIGH LEVEL (POST INSULATOR)
PLANT PROPOSED
NOTES:- 1. BASED ON DESIGN REQUIREMENTS TAKEN FROM KINARDOCHY
SUBSTATION DRD LT96-DRD-G1-REV1 (TBC). 2. ALL DIMENSIONS SHOWN IN MILLIMETRES (mm) U.N.O. 3. PROPOSED LAYOUT FOR PLANNING PURPOSES ONLY. 4. SITE DEVELOPED FOR POTENTIAL UPGRADE TO 400kV IN FUTURE
THEREFORE 400kV ELECTRICAL CLEARANCES HAVE BEEN USED WHERE APPROPRIATE.
5. GIS AND CONTROL BUILDING TAKEN FROM PROPOSED PETERHEAD 400kV SUBSTATION, REFER TO SSEN DRAWING NUMBERS: LT135_PEHE_0805_0001_00_00 - FOR PLANNING-400KV GIS CONTROL BUILDING GA AND LT135_PEHE_0805_0002_00_00 - FOR PLANNING-400KV GIS CONTROL BUILDING ELEVATIONS.
6. GIS AND CONTROL BUILDING FOOTPRINT ASSUMED SUITABLE FOR 275kV OR 400kV EQUIPMENT.
7. AIS PLANT INFORMATION TAKEN FROM STANDARD SSE FRAMEWORK LAYOUTS.
8. ASSUMED STATCOM TRANSFORMER LOCATED ON WEST OF STATCOM COMPOUND BUT CONNECTUON FROM GIS COULD BE MODIFIED TO ACCOMODATE A DIFFERENT TRANSFORMER POSITION.
9. CURRENTLY NO INFORMATION ON MSCDN REQUIRED AT THIS SITE. INDICATIVE SPACE ENVELOPE ONLY.
10. BUILDING OUTLINE INDICATIVE ONLY - DESIGN TO BE CONFIRMED. 11. GIS BAYS 8,9,10,11 AND 12 ARE SPACE PROVISION ONLY. GIB ENTRIES TO
BE PROVIDED. 12. OVERHEAD LINE ROUTES AND POSITION OF TOWERS (TERMINAL OR
OTHERWISE) TO BE CONFIRMED AND SUBJECT TO SEPARATE SECTION 37 CONSENT.
13. OHL REQUIRE TO BE MODELLED TO ENSURE NO INFRINGEMENT OF ELECTRICAL CLEARANCES.
14. PLATFORM DATUM, TO BE CONFIRMED. 15. ELECTRICAL PHASING TO BE CONFIRMED. 16. ACCESS ROUTE TO SITE TBC. 17. PROPOSED PLATFORM AREA = 63870m² / 15.78acres.
FOR PLANNING
Substation dimensions
• The Substation platform dimensions are approximately 302 x 212m (plus any landscaping)
• Substation building heights vary between 5.5m and 16m
Minor internal alterations to protection and control systems will also be required at the existing 275kV substation.
Environment
08 www.ssen-transmission.co.uk/projects/kinardochy-substation
Kinardochy Substation
Desk-based studies and site walkovers have been undertaken to gather data and understand the key environmental constraints and opportunities within the local area. This process has helped to identify the key environmental issues for this project to be landscape and visual amenity, habitats / hydrology and forestry. Other environmental aspects including cultural heritage, protected species, natural heritage and biodiversity will be further considered during the detailed environmental assessment.
Following confirmation of the proposed site location, further detailed studies and assessment work will be undertaken to ensure all required mitigations are fully understood and implemented during the detailed design and construction phases. Further consultation will be undertaken as part of the planning process, and appropriate supporting documentation, to include an environmental assessment report will be submitted as part of the planning consent applications.
Habitats / Hydrology
There are no sites designated for habitat conservation located in proximity to site 4, and the site contains no Annex 1 habitats under the habitats directive. Site 4 is dominated by sitka spruce plantation with a large area of unmanaged heather dominated dry heath along its western edge. The site can be waterlogged, with small pools of standing water. There are some areas of deeper peat and careful micrositing will be undertaken to avoid these areas where possible.
Landscape and visual amenity
The site lies on the transitional edge of the Highland Summits and Plateaux and Lower Highland Glens with Lochs Landscape Character Type (LCTs). The site is located within a coniferous plantation which encloses, and contrasts with, the more open reflective surface of Loch Kinardochy, which is a key focal point in the landscape situated to the south east of the site and popular for trout fishing and wildlife watching. Potential views across Loch Kinardochy, although within a short section, towards the site are available from the B846 (General Wade’s Military Road) Distant elevated views of the site are likely from some elevated locations within Loch Rannoch National Scenic Area (NSA), including Schiehallion/Breadalbane- Schiehallion Wild Land Area (WLA). A full landscape and visual amenity assessment will be undertaken and appropriate mitigation, including micrositing and landscaping will be developed.
Forestry
The site is located within an area mostly covered by coniferous woodland plantation, with a small part of it within a glade. Land use within 5 km of the site is primarily rural, with large plantation areas located at the east and west. Historical land use on the site has been the same as at present, as shown on the earliest historical maps. Felling will be required to facilitate the development.
www.ssen-transmission.co.uk/projects/kinardochy-substation
What happens now and how do I have my say?
We understand and recognise the value of the feedback provided by members of the public during all engagements and consultations. Without this valuable feedback, the project development team would be unable to progress projects and reach a balanced proposal.
We are keen to receive your views and comments in regards to the following questions:
• Has the requirement for the project been clearly explained?
• Have we explained the approach taken to select the proposed site adequately?
• Are there any additional factors, or environmental features, that you consider important and should be brought to the attention of the project team?
Comments
Your views and comments can be provided to the project team by completing a feedback form or by writing to Louise Anderson, Community Liaison Manager. We will be seeking feedback from members of the public and Statutory Bodies until the 13th September 2019.
All received feedback will be assessed and the proposed options adapted where necessary.
Additional information
Information will also be made available via the project webpage and social media channels:
Project Website: www.ssen-transmission.co.uk/ projects/ kinardochy-substation
Follow us on Twitter: @ssencommunity
Follow us on Facebook: @ssencommunity
Community Liaison Manager Louise Anderson
[email protected]
Louise Anderson Scottish and Southern Electricity Networks, 200 Dunkeld Road, Perth, PH1 3AQ
Please use space below to provide further comments:
Full name
Scottish and Southern Electricity Networks is a trading name of: Scottish and Southern Energy Power Distribution Limited Registered in Scotland No.
SC213459; Scottish Hydro Electric Transmission plc Registered in Scotland No. SC213461; Scottish Hydro Electric Power Distribution plc Registered in
Scotland No. SC213460; (all having their Registered Offices at Inveralmond House 200 Dunkeld Road Perth PH1 3AQ); and Southern Electric Power
Distribution plc Registered in England & Wales No. 04094290 having its Registered Office at Number One Forbury Place, 43 Forbury Road, Reading,
Berkshire, RG1 3JH which are members of the SSE Group.
Closing date for feedback is 16:00, Friday 13th September 2019.
The feedback form and all information provided at the event can also be downloaded from the dedicated website:
Any information given on the feedback form can be used and published anonymously as part of Scottish and Southern Electricity Networks
consultation report. By completing this feedback form you consent to Scottish and Southern Electricity Networks using feedback for this purpose.
Thank you for taking the time to complete this feedback form.
Please hand your completed form in at the event or alternatively by one of the methods below:
Post: Scottish and Southern Electricity Networks, 200 Dunkeld Road, Perth, PH1 3AQ
Email: [email protected]
Online: www.ssen-transmission.co.uk/projects/kinardochy-substation
Download: Comments forms and all the information from today’s event will also be available to download from the project website.
Address
Telephone
If you would like to be kept informed of progress on the project please tick this box.
If you would like your comments to remain anonymous please tick this box.
11
Thank you for taking the time to attend this consultation event. In order to record your views and improve the effectiveness of
our consultation, please complete this short feedback form.
Please complete in BLOCK CAPITALS. (Please tick one box per question only)
Your Feedback
Q3 Are there any additional factors, or environmental features, that you consider important
and should be brought to the attention of the project team?
Q1 Has the requirement for the project been clearly explained?
Yes
Kinardochy Substation
Q2 Have we explained the approach taken to select the proposed site adequately?
Yes
11
Thank you for taking the time to attend this consultation event. In order to record your views and improve the effectiveness of our consultation, please complete this short feedback form.
Please complete in BLOCK CAPITALS. (Please tick one box per question only)
Your Feedback
Q3 Are there any additional factors, or environmental features, that you consider important and should be brought to the attention of the project team?
Q1 Has the requirement for the project been clearly explained?
Yes No Unsure
Kinardochy Substation
Q2 Have we explained the approach taken to select the proposed site adequately?
Yes No Unsure
Full name
Scottish and Southern Electricity Networks is a trading name of: Scottish and Southern Energy Power Distribution Limited Registered in Scotland No. SC213459; Scottish Hydro Electric Transmission plc Registered in Scotland No. SC213461; Scottish Hydro Electric Power Distribution plc Registered in Scotland No. SC213460; (all having their Registered Offices at Inveralmond House 200 Dunkeld Road Perth PH1 3AQ); and Southern Electric Power Distribution plc Registered in England & Wales No. 04094290 having its Registered Office at Number One Forbury Place, 43 Forbury Road, Reading, Berkshire, RG1 3JH which are members of the SSE Group.
Closing date for feedback is 16:00, Friday 13th September 2019.
The feedback form and all information provided at the event can also be downloaded from the dedicated website:
Any information given on the feedback form can be used and published anonymously as part of Scottish and Southern Electricity Networks consultation report. By completing this feedback form you consent to Scottish and Southern Electricity Networks using feedback for this purpose.
Thank you for taking the time to complete this feedback form.
Please hand your completed form in at the event or alternatively by one of the methods below:
Post: Scottish and Southern Electricity Networks, 200 Dunkeld Road, Perth, PH1 3AQ
Email: [email protected]
Online: www.ssen-transmission.co.uk/projects/kinardochy-substation
Download: Comments forms and all the information from today’s event will also be available to download from the project website.
Address
Telephone
If you would like to be kept informed of progress on the project please tick this box.