Abstract
Gas-electric interdependencies have contributed to several major electric system emergencies. Natural gas pipelines use both gas-powered and electric-powered compressor units; power outages at the latter can cause gas shortages. We make the first rigorous identification of the number of US electric compressor stations, finding that 10% are electric. California, the Midwest, the Gulf Coast, and the East have high installed electric compressor capacity. New hydraulic models, verified by past events, show that disrupting power to a single compressor station can force a loss greater than 2 GW of downstream gas generators. Such an outage can be larger than the most severe single-cause failure currently considered in electric reliability planning. Electric utilities should immediately incorporate the identified facilities into critical facility lists. Establishing a federal gas reliability organization, comparable to what is now done for electric power, could improve gas reliability by establishing appropriate reliability reporting, incident investigation, and minimum industry standards.
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