of entry points, $\textbf{K}\!=\!\{1,2,...,K\}$
  $[tT, (t+1)T)$                             $t$-th interval with $T$ being the length of a slot
  $P_l$                                      Capacity of the $l$-th transformer/line
  $X_{li}$                                   Indicating variable for the relationship between the $l$-th node and the $i$-th charing station
  $N_l(t)$                                   Amount of uncontrollable loads connected to the $l$-th node in time slot $t$
  $U_i(t)$                                   Production rate of a renewable energy generator for thr $i$-th station
  $B_i(t)$                                   Energy level of the storage device for the $i$-th charging station
  $R_i(t)$                                   Charging rate renewable energy charged into the $i$-th charging station’s battery
  $r_{ij}(t)$                                Charging rate of the charging outlet $j$ in the $i$-th charging station
  $D_i^d(t)$                                 Energy flow from the grid to charging outlets directly
  $\epsilon$                                 Maximum probability of the overload chance
  $c(t)$                                     Power price in time slot $t$ in the system
  $\sigma_{N_l}$                             Standard deviation of $N_l(t)$
  $e_k(t)$                                   Amount of energy demand at the $k$-th entry point in time slot $t$
  $\eta_k(t)$                                Whether there is a PEV carrying an amount of energy demand of $e_k(t)$ in time slot $t$
  $E_k(t)$                                   Energy demand arrives at the $k$-th entry point in time slot $t$
  $p_k$                                      Probability of PEVs sending request to the $k$-th entry point
  $W_{k,ij}(t)$                              Indicating variable for connections between $k$-th entry point and $i$-th charging 