  Interactions between power and gas systems, which are both large and complex,
have been gradually intensified during the last decades, predominantly due to
the propagation of large fleet natural gas-fired power units (GPUs) and the
technological developments of power-to-gas (P2G) facilities. These interactions
not only bring significant economic benefits to society but also provide
additional operating flexibilities, which are essential to handle fluctuations
of the large-scale renewable power generation (RPG) and power system
contingencies. Moreover, neglecting these interactions in power system
operation may not only result in infeasible operation status in the gas systems
but also increase the decision-making operation costs of both systems. previous
studies suffered from two significant drawbacks, namely (1) they assumed the
existence of only one utility that has full control authority over the power
system and gas system; (2) the economic interactions between power systems and
gas systems have been neglected, which goes against the current industrial
practice. This research revisits the day-ahead resilient and economic
operations of power systems considering the economic and physical interactions
with gas systems, which are characterized by the modeling of bilateral energy
purchase contracts and operational constraints of gas systems. This thesis
provides a novel perspective and solution for the resilient and economically
coordinated robust operation of integrated electric-gas systems (IEGSs) under
uncertainties. The proposed robust scheduling decision frameworks are
practically compatible with the existing industrial operations of the IEGSs.
