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Engineering

Reliability Analysis of Redundant Power Distribution Networks

Quick fact

Modern redundant power distribution networks can achieve availability as high as 99.999% (about 5 minutes of downtime per year) by using multiple parallel paths and automatic switching—far outperforming the 99.9% (about 9 hours) typical of a simple radial network.

Why this is interesting

You flip a switch and the power is on—almost always. But how do utilities make that 'almost always' possible, especially when failures are inevitable?