The project aims to reduce the time, cost and complexity of creating new connections onto the UK Power Networks 132kV network. It will assess whether a 145kV-rated branch joint, combined with a single-bay Gas Insulated Switchgear (GIS) substation, can provide a safe and reliable alternative to the current standard three-bay GIS arrangement. As part of the project, the branch joint will be tested, certified and, if successful, integrated into BAU operations.The project responds to growing connection demand driven by the energy transition, including low-carbon generation, emerging technologies and the electrification of heat, transport and industry. Existing connection methods can be intensive on time, costs and resources. A more efficient approach could reduce civil works, outage requirements and connection costs while supporting network growth, without compromising safety or reliability. This will help UK Power Networks deliver the infrastructure needed for the transition to Net Zero.

Benefits

Reduced complexity, time and costs associated with 132kV network enhancements

The project will enable the use of a 145kV-rated branch joint to provide new connections to the 132kV network. The delivery of this is anticipated to be less complex and ultimately cheaper than the currently used three-bay GIS substation solution as it will involve installing the branch joint and a single-bay GIS substation. 

Reduced time for customers to connect

The project will enable the use of the branch joint (combined with a single-bay GIS substation) over the development of a three-bay GIS substation. This shall take less time to deliver, ultimately leading to customers being able to connect faster.

Improved 132kV network resilience and flexibility

The branch joint could improve the resilience of the 132kV network. In the event of a 132kV cable fault feeding a site, normally with two transformers, a 132kV branch joint would be able to feed both cables from a single incoming circuit. 

Enabling Net Zero delivery

Through the reduction of time required to deliver connections to the 132kV network, the project will support the delivery of net zero by enabling faster low carbon technology (LCT) uptake.