  The dispatchable region of volatile renewable power generation (RPG)
quantifies how much uncertainty the power system can tackle at a given
operating point. State-of-the-art DR research has studied how system operation
constraints influence the DR, but seldom considered the effect of the
distributional features of RPG outputs. The resultant DR is generally described
by a large number of boundaries, and the most critical information about the
actual ranges of RPG outputs that the system can accept is often suppressed. To
make DR methods friendly to users and obtain critical information, a novel DR
for RPGs is proposed which takes both operation constraints and distributional
features of RPG outputs into account. Compared to the traditional DR, the
proposed DR is enclosed by a small number of valid boundaries that restrict the
actual output ranges of RPG and is thus simpler to use. The procedure for
constructing the proposed DR entails progressively searching valid boundaries
by exploiting the historical RPG output data and is formulated as a
mixed-integer linear program. A parallel solution paradigm is also developed to
expedite the construction procedure when using a large historical dataset of
RPG outputs. Simulation tests on the IEEE 30-bus and 118-bus systems verify the
effectiveness of the proposed DR and the efficiency of the proposed algorithm.
