  The international mega-event, such as the Winter Olympic Game, has been
considered as one of the most carbon intensive activities worldwide. The
commitment of fully renewable energy accommodation and utilization while
ensuring the extreme high reliability has brought significant challenges on
system operation due to the stochastic nature of the renewables. The battery
energy storage system (BESS) composed of stationary energy storage system
(SESS) and shared mobile energy storage system (MESS) can be utilized to meet
the requirements of short-term load surges, renewable accommodation and
emergency power supply for important loads during the mega-event. The BESS can
continue to serve the venues electricity consumption to satisfy the carbon
neutrality after the event. On the other hand, the low ambient temperature of
Winter Olympic game has significant impact on BESSs degradation and performance
which need to be integrated to the charging and discharging model of BESS. To
this end, a joint two-stage optimal configuration method considering the
ambient temperature of SESS and MESS has been developed to support the
mega-event carbon neutrality, to reduce redundant BESS capacity allocation and
improve the system life cycle cost-benefit. Simulation results have
demonstrated the rationality and effectiveness of the collaborative operation
of SESS and the MESS under various scenarios.
