  Storage-concerned economic dispatch (ED) problems with complementarity
constraints are strongly non-convex and hard to solve because traditional
Karush-Kuhn-Tucker (KKT) conditions do not hold in this condition. In our
recent paper, we proposed a new exact relaxation method which directly removes
the complementarity constraints from the model to make it convex and easier to
solve. This paper further extends our previous study, with more than one group
of sufficient conditions that guarantee the exact relaxation presented, proven
and discussed. This paper may contribute to wider application of the exact
relaxation in storage-concerned ED problems.
