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  • Flexibility services calls

  • SSEN CMZ – Opportunities and Live CMZ Zones

    Listed below are details of current CMZ tender exercises undertaken by SSEN and opportunities under assessment, SSEN will update details as new zones are progressed.

    October 2020

    SSEN has identified a section of its network on Islay and Jura that can benefit from the adoption of flexible services, known as Constraint Managed Zones (CMZ), and is set to launch a trial to manage multiple service providers alongside its existing Bowmore power station on Islay, utilising a flexibility service management system.  

    The flexible services, from renewable energy generators and battery storage facilities, can opt in to being paid to provide power to support SSEN's network to prevent overloading of assets, or during maintenance and faults on the network to reduce the reliance on fossil fuel-based energy generation. Service providers can also opt in to be paid to turn down their electricity demand to support SSEN's network operations. 

    SSEN successfully ran a CMZ trial on Islay in the past year, working with a local generator to keep the power flowing to customers on Islay, Jura and Colonsay, as teams worked to replace the subsea cable feeding the islands. 40% of the average local electricity demand was met by ensuring customers on the islands continued to receive the power they needed.

    In the documents below, you will see a map of the Islay CMZ location with a list of postcodes. These postcodes represent the areas within the map, DERs with these postcodes will be applicable to provide CMZ services subject to technical review and physical connection point.

    July 2020

    SSEN has identified 11 areas, known as Constraint Managed Zones (CMZs), which will benefit from flexibility services to manage electricity demand during maintenance work or fault conditions. The locations are: 

    • St Mary's, Orkney Islands
    • Barvas A and B, Isle of Lewis, Western Isles
    • Aultbea, North-West Highlands
    • Ullapool, Highlands
    • Fort William, Highlands
    • Scalloway, Shetland Islands
    • Setter Sandwick, Shetland Islands
    • Sumburgh, Shetland Islands
    • Raigmore, Inverness
    • Waterloo Place, Inverness


    On the 10th July 2020, we held a webinar which include presentations from a number of energy experts, setting out the flexibility services that SSEN is sourcing and the procurement process.

    You can watch this webinar here:

    Part 1

    Part 2 


    May 2020

    SSEN has identified four areas, known as Constraint Managed Zones (CMZs), which will benefit from flexibility services to manage electricity demand during maintenance work or fault conditions. The locations are: 

    • Havant
    • Chickerell
    • Thatcham
    • Rownhams


    On the 15th May 2020, we held a webinar which include presentations from a number of energy experts, setting out the flexibility services that SSEN is sourcing and the procurement process. You can watch this webinar here: https://vimeo.com/422444873

    March 2020

    SSEN seeks flexibility service providers in the Havant Region of Hampshire and Achintee, Cassley, Dunoon, Kilmelford and Port Anne in Scotland.

    SSEN has identified zones in and around the above areas which will benefit from smarter solutions - better known as flexible services - to manage electricity demand during maintenance work or fault conditions.

     

    These areas will shortly go live in tender processes, and businesses, aggregators and communities across will have the opportunity receive payments for providing flexibility services. SSEN are calling on interested parties to register at https://www.ssen.co.uk/FlexibleConnections/ and be an active part in delivering a smarter, flexible and more cost-effective network.

     

    SSEN has designed a suite of new Constraint Managed Zone (CMZ) flexibility services with the aid of the Flexible Solutions Team, the solutions agreed for application in this release are; 

     

    o    CMZ Prepare – Required to support the network during planned maintenance work. 

     

    o    CMZ Respond - Required to support the network during fault conditions while there are planned outages

     

    o    CMZ Restore – Utilisation-only product, needed to support the network during networks faults.

     

    SSEN is committed to openly testing the market to see what flexibility services are available from smart technologies such as renewable energy generation, demand side response and energy efficiency measures, and compare the cost of using them against building new energy infrastructure. By making these areas visible online, SSEN hopes to improve the customer journey and engage its customers in the transition to a smarter, flexible electricity network.

     

    Scheme Details

     

    CMZ Achintee

     

    Expected Date of Release – March 2020

     

    Service Type – Dynamic & Restore

     

    Zones – Achintee

     

    Capacity Required – No upper limit

     

    Responses to tender received –  Tender in Progress

     

    Outcome – Pending

     

    CMZ Cassley

     

    Expected Date of Release – March 2020

     

    Service Type – Secure, Dynamic & Restore

     

    Zones – Cassley

     

    Capacity Required – No upper limit

     

    Responses to tender received –  Tender in Progress

     

    Outcome – Pending

     

    CMZ Dunoon

     

    Expected Date of Release – March 2020

     

    Service Type –  Dynamic & Restore

     

    Zones – Dunoon

     

    Capacity Required – 4MW minimum

     

    Responses to tender received –  Tender in Progress

     

    Outcome – Pending

     

    CMZ Kilmelford

     

    Expected Date of Release – March 2020

     

    Service Type – Secure, Dynamic & Restore

     

    Zones – Kilmelford

     

    Capacity Required – 1MW minimum

     

    Responses to tender received –  Tender in Progress

     

    Outcome – Pending

     

    CMZ Port Ann

     

    Expected Date of Release – March 2020

     

    Service Type –Dynamic & Restore

     

    Zones – Port Ann

     

    Capacity Required – 2MW minimum,

     

    Responses to tender received –  Tender in Progress

     

    Outcome – Pending

     

    CMZ Havant

     

    Expected Date of Release – March 2020

     

    Service Type – Secure, Dynamic & Restore

     

    Zones – Havant

     

    Capacity Required – No upper limit

     

    Responses to tender received –  Tender in Progress

     

    Outcome – Pending

     

    SSEN are reviewing potential for new CMZ zones in Chickerell, Aldershot, Rownhams, Fareham and Thatcham , details to follow!

    CMZ zone map

    SSEN CMZ - Historical Tender Information Updated – March 2020

    CMZ Results

    To date SSEN’s CMZ tenders have saved over £180,000 against traditional alternatives, saved over 1750 tons of CO2 and provided enough energy through renewable sources to power 400,000 homes for a week! SSEN remains committed to implementing flexibility across its networks where viable, for more information see our future opportunities page here; https://www.ssen.co.uk/FlexibleConnections/

    Listed below are details of historic CMZ tender exercises undertaken by SSEN, details will be added of current CMZ tenders within 3 months of completion.

     

    CMZ Western Isles & Skye

     

    Date Released – July 2019 

     

     

    Service Type – Prepare, Respond, Restore

     

     

    Zones – Western Isles & Skye

     

     

    Capacity Required – No upper limit

     

     

    Responses to tender received – Yes, 2

     

     

    Outcome – Protracted procurement process, contracts hope to be placed in early 2020 

     

     

    CMZ Islay

     

    Date Released – July 2019 

     

    Service Type – Prepare, Respond, Restore

     

    Zones – Islay

     

    Capacity Required – No upper limit

     

    Responses to tender received – Yes, 1 (single source provision)

     

    Outcome – ITT phase Completed, Contracts Issued to 1 provider

       

    CMZ ‘3’

     

    Date Released – November 2017  (Re-released November 2018)  

     

    Service Type - Prevent

     

    Zones – Bramley, Drayton, Coxmoor Wood

     

    Capacity Required – 18MW

     

    Responses to tender received – Yes, 6 responses

     

    Outcome – ITT phase Completed, No contracts issued

       

    CMZ 1 & CMZ 2 (Developmental Releases)

     

    Date Released – 2016 

     

    Service Type - Prevent

     

    Zones – Yeovil, Standlake

    Capacity Required – 10MW

     

    Responses to tender received – Yes, over 50 responses

     

    Outcome – ITT phase Completed, No contracts issued