Improved Statistical Ratings for Distribution Overhead Lines
Western Power Distribution, Scottish and Southern Electricity Networks, SP Energy Networks, Northern Powergrid, Electricity North West Limited and UK Power Networks
Paul Jewell - Policy Manager; Sven Hoffman - Company Overhead Line Engineer
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Network Innovation Allowance
This project will use the test rig facility to gather 2 years of conductor and weather data. This data will be analysed to validate and update overhead line ratings, update existing tools and methodologies, and produce a software tool that will enable GB DNOs to further optimise regional or line specific ratings.
- To monitor the weather conditions and co-incident temperatures of various conductors at various current levels in order to provide a new dataset for the assessment of the weather risk element of probabilistic ratings and to derive a methodology for quantifying this risk, in combination with load risks, in order to calculate line ratings.
- To update ENA ER P27 and ENA ACE 104.
- To validate the updated CIGRÉ methodology for calculating conductor temperature from load and weather data, allowing the possibility of future “desk top” re-runs of the project to cover different locations and time periods.
- To update existing software tools, and to provide a new software tool to enable more comprehensive (regional or line specific) rating assessments to be made.
- To engage with the Met Office to enable rapid provision of appropriate weather data sets.
- Sufficient data collection to build a robust model of overhead line ratings.
- Analysis of that data to produce a model that enables more robust rating of overhead lines than the current model.
- A new software tool to enable more comprehensive (regional or line specific) rating assessments to be made.
- A robust, accurately informed revision of ENA ACE 104 and ENA ER P27.