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08:42 PM
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[quote:Anonymous Coward 24289757:MV8yMDcwNDc1XzM0ODQ2OTEyXzJBOUQ2NUU0] Of course... it could be days, weeks or years before something like this could happen.... but I expect it will happen one day. [color=red]There are two risks that result from the introduction of GICs to the bulk power system: * Damage to bulk power system assets, typically associated with transformers, and * Loss of reactive power support, which could lead to voltage instability and power system collapse. Restoration times of the power system from these two risks [damage to transformers and voltage instability] are significantly different. For example, restoration times from system collapse due to voltage instability would be a matter of hours to days, while replacing transformers requires long-lead times (a number of months) to replace or move spares into place, unless they are in a nearby location. Therefore, the failure of a large number of transformers would have considerable impacts on large portions of the system:' See the Chart on page 15 - it show all of the EAST as far as Indiana and Oregon and Washington for the areas that will have a Effects on the U.S. Power Grid Restoration times of the power system from these two risks [damage to transformers and voltage instability] are significantly different. For example, restoration times from system collapse due to voltage instability would be a matter of hours to days, while replacing transformers requires long-lead times (a number of months) to replace or move spares into place, unless they are in a nearby location. Therefore, the failure of a large number of transformers would have considerable impacts on large portions of the system:' [/color] [/quote]
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