Natural disasters have been causing severe power outages in recent years. For example, in 2012, after
Hurricane Sandy struck the East Coast of the U.S., approximately 8.35 million customers were reported
without power. Hurricane Harvey recently has caused severe power outages in Houston. It dumped an
estimated 27 trillion gallons of rain over Texas and Louisiana during a 6-day period. Nearly 300,000
customers were without power after Hurricane Harvey hit the coast near the town of Rockport. ERCOT
reported the power loss as due to more than 150 damaged transmission circuits. ERCOT oversees 90
percent of the state's electricity grid. This presentation will introduce a two-phase mathematical stochastic
framework for enhancing the power grid resiliency in the presence of extreme events using defensive
islanding, mobile truck-mounted substation and emergency response generators scheduling during a
Hurricane. In the first phase, a damage assessment model is presented for detection of possible damages
and doing preventive maneuver action in the grid to minimize the followed damages by Hurricane. The
first stage determines the optimal truck-mounted substation and emergency response generators sizes and
number anticipating, and initial state of the grid defensive topology for an arrival extreme event, and the
second stage adjusts the truck numbers and grid reconfiguration, if necessary, when the arrival time of the
predicted extreme event becomes closer with updated information. The truck driving paths to feed the
temporary Point of Interconnection (POI) points of the split power distribution grid is generated in the
second phase while with considering the operation and travel costs (including time) of the truck. Two sets
of scenarios are considered for numerical studies from the west area of the city of Houston which was
affected by Hurricane Harvey in 2017.

Location:
Entergy THQ Cafetorium
1340 Echelon Parkway
Jackson, Mississippi
39213