This study presents first results from a pilot project on using fault indicators and self-healing in medium-voltage distribution grids. Directional earth-fault indicators were chosen and deployed in real environments to test their functionalities and quantify their benefits for efficient grid operations. Self-healing concepts using these indicators will be tested in the described project. Different communication schemes will be explored in order to find the most costeffective solutions. Theoretical potentials of the expected benefits of the fault indicators located at different positions in the grid were modelled and will be compared to the results from field tests.
This paper presents a reliability perspective of capturing the impact of individual smart grid technologies at the distribution level. A small case study on Hafslund Nett, the largest distribution network company in Norway, is presented to substantiate the hypothesis that by utilising SG technologies such as sensors and remote controlled sectionalisers together with global positioning systems, there is an increased scope for achieving a reduction in the frequency and duration of customer interruptions and the associated interruption costs.
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