The invention provides a medium-short term coordinated dispatching method for ultra-
high voltage AC-DC
hybrid power grid, and relates to the field of electrical power
system power generation dispatching. When
electricity is transmitted from west to east, feed-in scale is sharply increased in a low peak period, and load adjustment difficulty of a receiving power network is significantly increased, causing a
power grid medium-short term start-up mode and running plan arrangement difficulty to be increased accordingly. The method comprises
medium term plan formulation and short term plan formulation. The
medium term plan formulation adopts a month as a
decision cycle and a day as a calculation period, on the conditions of guaranteeing electrical power
system load requirements and operational parameters of a
power station and a
machine set, monthly
electricity is divided into days, and a daily start-up mode of the
machine set is optimized; the short term
plant forms a 96-point
power output plan of daily
electricity according to a short-term load prediction result; rolling amendment is conducted on an original medium-term power generating plan according to the latest prediction information of the load and
machine set actual electricity completion situation; according to the technical scheme, frequent start-ups and stops of the power generating machine set are avoided, effective engagement and mutual coordination between a
medium term and short term power generating plan are achieved.