Respond trials and analysis
Respond trials and analysis
Respond’s two technical fault level mitigation solutions were trialled in our substations as follows:
- Adaptive Protection: Five installations on 11kV and 6.6kV high voltage (HV) substations and two installations on 33kV extra high voltage (EHV) substations
- Is-limiters at two HV substations and monitoring at an additional five substations.
The reports below document our findings during the Respond trials.
During the project trials we validated every fault that occurred to ensure that the Respond installations operated correctly.
The following post-fault analysis reports assess the performance of the fault level mitigation techniques.
Site selection methodology
How Respond substation sites were selected to ensure the trial results are representative of the GB population.
Peer review of trial site selection
Peer review of the site selection methodology by WSP to confirm that the sample is statistically representative.
Post fault analysis methodology
A report by WSP on how the performance of the fault level mitigation techniques were assessed following a fault.
FCL service installation agreement
Template agreement for the installation and management of fault current limiting (FCL) services.
Fault level monitoring and modelling
Provides a practical understanding of how close the simulated fault levels using network models are to the ‘actual’ values.
Cost benefit analysis and buy order - final
Final report on the cost benefit analysis of Respond fault level mitigation techniques.
DCUSA change proposal
Change proposal for amending the application approach to the fault level cost apportionment factor in the Common Connection Charging Methodology.
Adaptive protection safety case
Safety assessment of the Respond adaptive protection scheme, produced by WSP with input from and peer review by other distribution network operators.
Asset health study
Condition monitoring of network assets which may be affected by the Respond project.
Carbon impact assessment final report
Final report on the carbon impact of Respond compared to traditional approaches for managing fault levels.
FCL service safety case
Safety assessment for implementing fault current limiting (FCL) services on the electricity network.
Is-limiter safety case
Safety assessment for installation of Is-limiters as a fault level mitigation technique on the electricity distribution network.