An innovation that can better protect power grids
The Hindu
High current surges, if unchecked, cause heating of the wires and perhaps melting and consequent short-circuits and fire accidents
Researchers from Indian Institute of Technology (IIT) Kanpur have come up with an innovation that can help protect power grids against sudden, unexpected current surges. An innovative variation of the superconducting fault current limiter (SFCL), this smart SFCL not only shields the grid from large current surges and consequent fire accidents, it can also sense when the current surges will happen and warn the system about it.
Power grids need protection from sudden surges in the current (fault current) that arise due to short-circuits, sudden overdrawing of power or excess power generated due to a falling demand. These surges cause heating of the wires and perhaps melting and consequent short-circuits and fire accidents. Earlier this used to be controlled by using circuit breakers, which would cut off the current in the event of a surge. These suffered from the limitation that if the response time to the current surge was too large, they would fail to be effective. Also, once the circuit was broken to avert the accident, the switch had to be manually turned on once again, and this could lead to longer power cuts.
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