Load demand and DER output at time t in the s th scenario, respectively. P s,i,t Power output of CMG at time t in the s th scenario. P s,ESS,t Charging/discharging power of ESS at time t in the s th scenario. B s,ESS Total energy of ESS in the s th scenario. SOC s,ESS,t State-of-charge (SOC) of ESS at time t in the s th scenario. SOC s,ESS , SOC s,ESS Upper and lower SOC limits of ESS in the s th scenario. η c , η d Charging and discharging efficiency of ESS. SOC s,ESS,0 Initial ESS SOC on each day in the s th scenario. P s,i , P s,i Upper and lower power limits of CMG in the s th scenario. P s,DER , P s,DER Upper and lower power limits of DER in the s th scenario. P s,ESS , P s,ESS Upper and lower power limits of ESS in the s th scenario. ε u s (x) , ε l s (x) Boundary function of the upper and lower limits of the uncertainty power output, respectively. ε u d (x) , ε l d (x) Boundary function of the random upper and lower bound curves of the power demand, respectively. ε u s_combined