Superconducting Fault Current Limiter

 

Growing electricity demand, the expansion of renewable power and progressive power grid meshing face operators of electric grids with a new challenge: Higher loads, more distributed generation, and changing load flows in the networks lead to increasing fault currents in the event of short circuits. This trend will require substantial spending for replacements of transformers and switchgear in stretched sections of the power distribution infrastructure where fault current levels threaten to exceed the rating of operating equipment in place. The Superconducting Fault Current Limiter (SFCL) launched by Nexans is a fundamentally new self-acting system that protects grid operating equipment from damaging current peaks during faults events and circuit feedbacks. The SFCL can be deployed to facilitate grid expansion and avert ahead-of-schedule upgrading. It also enables cost-efficient grid stabilization and optimization. 

The Nexans SFCL features:
 
 
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ultra-fast response – fault currents are limited within the first half-cycle
 
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intrinsic safety – fault currents are limited automatically without an external trigger
 
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no interruption of power supply – fault currents of any strength are limited to a pre-defined level
 
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self-recovering property – system automatically returns to superconducting state after a fault incident
 
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modular design – fault current limiting capacity can be adjusted to the grid environment

Connected to a power grid, the Nexans SFCL:

 
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causes virtually no voltage drop in rated current operation
 
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enables higher grid loads without upgrades of electrical equipment
 
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minimizes aging of grid equipment by mitigating mechanical and thermal stress during fault events
 
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facilitates power grid coupling and simplifies grid integration of distributed power as well as fault current control in the power supply of energy intensive industrial systems
 
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complements existing fault current control by avoiding power supply disruptions in the event of a fault

 
Read more about the working principle, the technical features and the  applications of the Nexans SFCL.