Performance analysis of a Superconducting Fault Current Limiter in a power distribution substation

• A novel Advanced Superconductor technology application is presented.
• The performance of the SFCL installation is analysed.
• The economic cost and benefit are analysed.
• Results show SFCL good performance and possible profitability.

All substations that make up an electric energy distribution system are vulnerable to unwanted voltage or current surges, with negative implications for the affected facilities. The consequence are economic losses for the companies which operate them as well as interruption of energy delivery. This paper presents the implementation of an advanced fault current limiting device based on second generation superconducting. The purpose of the system is to avoid the negative effects of network incidents. The research analyses the performance under the conventional operating conditions of a distribution substation in Spain. The results show a reduction of peak short-circuit currents, low operating losses and the correct operation of substation with interconnected busbars. The implemented system not only prevents economic losses due to the destruction or shortening of useful life of the equipment, but also increases the quality of energy supply to customers. The conclusion from the economic analysis is that the benefit-to-cost ratio of the technology would be positive with the estimated series-produced price for the system of 100000 €.

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