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43 significant disturbances and outages occurred in 2008, as compared with 30 such events in 2007. Greater scrutiny on how such events are classified, coupled with a rise in misoperations of protection systems and controls, drove the nearly 50% increase – most of which was seen in less severe Category 2 disturbances. Other contributing factors to 2008 disturbances were equipment failure, vegetation contacts, and human error.
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