Utiligence to build Longpasture solar substation: grid integration notes for engineers
Reviewed by Tom Sullivan

First reported on The Construction Index
30 Second Briefing
Utiligence has been appointed Independent Connection Provider for Enviromena’s Longpasture solar farm in County Durham, delivering a new 132 kV grid substation for adoption by Northern Powergrid. The scope includes design, construction and commissioning of the primary 132 kV substation, a dedicated 132/33 kV customer substation and an 11 kV backup supply system, with Utiligence managing the full lifecycle to final handover. For grid engineers, the project adds new high‑voltage capacity and a defined 33 kV interface to integrate large‑scale solar into the regional network.
Technical Brief
- Independent Connection Provider role means Utiligence delivers contestable works to Distribution Network Operator adoption standards.
- Full in-house capability allows integrated civil, primary plant, protection and control design under a single contract.
- Lifecycle scope from detailed design to energisation reduces interface risk between EPC, ICP and solar EPC contractor.
- Inclusion of an 11 kV backup supply system provides auxiliary and resilience feeds independent of the main export circuit.
- Enviromena’s grid team emphasised clear design–delivery–commissioning framework, indicating structured stage gates to energisation.
Our Take
A 132/33 kV dedicated customer substation with an 11 kV backup at Longpasture puts this UK solar farm into the same grid-integration class as large onshore wind and battery projects in our database, signalling that Northern Powergrid is treating it as a strategic node rather than a simple embedded generator.
For contractors like Utiligence, delivering to 132 kV connection and compliance standards in Great Britain typically opens up repeat work with distribution network operators such as Northern Powergrid, as DNOs tend to favour proven suppliers for subsequent grid reinforcement and protection upgrades.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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