The proposed development is located in the Local Authority area of The Highland Council, between Aberarder Estate and Dunmaglass Estate. The new overhead line (OHL) would extend for approximately 5km from the proposed Aberarder windfarm substation, teeing into the existing Dunmaglass 132kV OHL.
The OHL was initially specified as wood pole trident, however after engineering design wood pole is not considered suitable for the site location due to altitude and climatic conditions. An options assessment was completed to identify suitable structures for the local conditions.
The proposed new single circuit OHL will utilise metal monopole supports from the Aberarder substation for 4.7km from where wood pole supports will be used for approximately 0.3km to tee into the existing Dunmaglass wood pole line.
The circuit is proposed to be constructed using metal pole supports which are part of an ongoing development of New Suite of Transmission Structures (NeSTS), as an alternative to metal lattice towers.
The proposed NeST structures are single pole structures with three offset, cantilevered arms supporting the insulators and a top-mounted earth wire. The earthwire will be an optical ground wire (OPGW) incorporating fibre optic strands which are used for communication associated with protection and control of the network. The nominal height of the proposed metal pole supports is 24m, although extensions currently required for some of the structures to account for topographical features means their maximum height along the proposed line maybe up to 36m.
More information on the NeSTS structures can be found via this link.
The Developer, RES UK and Ireland Ltd have accepted a transmission connection offer in respect of their windfarm development at Aberarder wind farm.
As part of its statutory and transmission licence obligations, SSEN Transmission has a number of duties including:
The National Electricity Transmission System Security and Quality of Supply Standard (NETS SQSS) provides the criteria that SSEN Transmission must use to plan and design the transmission system. The defined criteria ensures the security of the Main Interconnected Transmission System (MITS).
Throughout the life of our projects, we aim to work positively with local communities and keep people informed about what we are doing. This is particularly important when we are developing a proposal and we want to understand what local people think about our plans.
We endeavour to take the time to discuss proposals with local community councils, encourage engagement from the wider community and listen to the feedback we receive.
We will do our best to answer any questions and address issues or concerns that are raised with us.
When our project progresses into construction, we will continue working closely with the local community to ensure that our work has as little impact on the lives of those living and working in the area and as many long term positive effects as possible.
The data in this map is provided for indicative purposes only and may be subject to change. Scottish Hydro Electric Transmission plc do not accept responsibility for its accuracy, completeness or validity. The data should not be copied, reproduced or utilised externally without permission.
Scottish and Southern Electricity Networks is the trading name of Scottish and Southern Energy Power Distribution Limited, Scottish Hydro Electric Transmission plc, Scottish Hydro Electric Power Distribution plc and Southern Electric Power Distribution plc.
The Scottish Ministers are responsible for determination of applications submitted under Section 37 of the Electricity Act 1989. Both statutory consultees and members of the public have the right to submit their representations on the application. All representations will be considered by Scottish Ministers in their determination of the application.
The Office for Gas and Electricity Markets (Ofgem), as the regulator, has to approve all investment so project proposals are developed under license conditions.
Preferred route corridors chosen will comply with revised ‘Holford Rules’ which are the recognised industry approach to routeing overhead lines amended to reflect Scottish circumstances.
It’s the highest voltage electricity network in the UK – the ‘motorway network’ of the energy world. It transmits large quantities of electricity over long distances via wires carried on a system of mainly metal towers (pylons) and large substations. Transmission voltages in Scotland are 132kV, 275kV and 400kV. Larger generation schemes usually connect to the Transmission system.
The lower voltage parts of the system are called distribution networks. In Scotland, these local networks operate below 132kV whereas in England the distribution network includes 132kV.
SHE Transmission are regulated by the Office for Gas and Electricity Markets (Ofgem), the regulator responsible for representing consumers' interests. Electricity consumer interests are therefore one of our key drivers and this is enshrined in our statutory duties under the Electricity Act.
In particular we have a statutory duty to develop, maintain and operate an efficient, economic and co-ordinated transmission system. Since the costs of these projects will ultimately be paid for by electricity consumers, we have a responsibility to take cost into account with due weighting in a comparison against other important factors.
Investments in projects are made by SHE Transmission plc. Electricity transmission companies are authorised to recover the costs of such investments through 'use of system' charges which are levied by National Grid Electricity Transmission plc on generators and suppliers of electricity. Suppliers recover their costs from all electricity customers. In order to protect the interests of customers, the transmission companies have to demonstrate to the energy regulator, Ofgem (Office for Gas and Electricity Markets) that proposed investments are necessary, are efficient and are economical so that the charges which are ultimately levied on all electricity customers are justified.
This means SHE Transmission is subject to a funding mechanism established by Parliament and regulated by Ofgem. Cross subsidies between different businesses in the SSE group is not permitted.
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