Electric power and natural gas systems are not separated but rather are
increasingly connected physically and functionally interdependent due to the
continuing development of natural gas-fired generation and gas industry
electrification. Such interdependency makes these two systems interact with
each other when responding to disasters. The aggravated risk of cascading
failures across the two systems has been exposed in recent energy crises,
highlighting the significance of preparing these interdependent systems against
disasters and helping their impacted services quickly recover. This promotes us
to treat power and gas systems as one whole to fully capture their interactive
behaviors. In this paper, we focus on the interdependent electric power and
natural gas distribution systems (IENDS) and propose a "supply - demand -
repair" strategy to comprehensively help the IENDS tide over the emergency
periods after disasters by coordinating mobile or stationary emergency
resources for various uses. Specifically, 1) on the supply side, the fuel
supply issue of different types of generators for emergency use is considered
and the fuel delivery process among different fuel facilities is mathematically
formulated; 2) on the demand side, a zonewise method is proposed for integrated
dispatch of power and gas demand responses; and 3) in the repair process, a
varying efficiency related to the repair units at work is introduced to
accurately model repairs. The proposed strategy is formulated into a
mixed-integer second-order cone programming model to obtain a globally optimal
decision of deploying all of those resources in a coordinated and organized
manner. A series of case studies based on test systems are conducted to
validate the effectiveness of the proposed strategy.Comment: 31 pages, 9 figures, submitted to Applied Energ