Abstract:With the large-scale integration of wind farms,the uncertainty of wind power poses great threat to the stability of power system.The Unified Power Flow Controller (UPFC) has been the most comprehensive Flexible AC Transmission System (FACTS) device ever since.It is advanced in power flow controlling.In this paper,UPFC is deployed to coordinate with wind power uncertainty.A multi-objective optimal power flow model incorporating UPFC is established to tackle with decision risk.Case studies on IEEE 14-bus system show that optimal decisions can be obtained by solving the proposed model and,most of all,risks can be reduced.