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EVALUATION

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AN INDEPENDENT <strong>EVALUATION</strong> OF THE LCNF<br />

E.5 Fault Level Management<br />

33kV Superconducting Fault Current Limiter (SFCL)<br />

Project Title<br />

33kV Superconducting Fault Current Limiter (SFCL)<br />

Tier 1<br />

DNO<br />

NPG<br />

Status<br />

Closed<br />

LCNF project funding £2,880,000, (total project value £3,200,000)<br />

Final LCNF £2,738,724<br />

Project objectives This project was designed to trial a specific piece of new equipment that has a direct impact on the operation and management<br />

of the distribution system. The first phase of the project was to identify suitable locations for the installation and undertake a<br />

feasibility and systems readiness study to analyse the network, outlining the optimum application and specification, and confirm<br />

the business and carbon cases.<br />

The second phase was to design, build, install and commission a three-phase 33kV superconducting fault current limiter on the<br />

Northern Powergrid distribution network.<br />

It was proposed, and following site surveys, agreed with National Grid, that the unit was installed at a 275/33kV substation in<br />

South Yorkshire to facilitate future connection of DG and additional load by limiting the likely increase in fault current to within<br />

the rating of the 33kV switchgear. Increase in fault level is typically managed through an operational management switching<br />

procedure which, in limited circumstances, may increase the risk of loss of supplies to customers.<br />

PÖYRY MANAGEMENT CONSULTING<br />

October 2016<br />

713_Poyry_Report_Evaluation_of_the_LCNF_FINAL_Oct_2016_v700.docx<br />

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