  The dispatchable region of volatile renewable power generation (RPG)
quantifies how much uncertainty the power system can handle at a given
operating point. State-of-the-art dispatchable region (DR) research has studied
how system operational constraints influence the DR but has seldom considered
the effect of the uncertainty features of RPG outputs. The traditional DR is
generally described by a large number of boundaries, and it is computationally
intensive to construct. To bridge these gaps, a novel type of DR is defined,
which is enclosed by potentially active boundaries (PABs) that consider the
operational constraints and uncertainty features of RPG outputs. The proposed
DR is easier to construct because the PABs are only a small part of the
traditional DR boundaries. The procedure for constructing the proposed DR is
described in terms of the progressive search for PABs, which is formulated as a
mixed-integer linear program by incorporating the discrete observed data points
of RPG outputs as an approximate distribution. A parallel solution paradigm is
also developed to expedite the construction procedure when using a large
observed dataset. Simulation tests on the IEEE 30-bus and 118-bus systems
verify the effectiveness and scalability of the proposed DR and the efficiency
of the proposed algorithm.
