The invention relates to the technical field of power
system optimization scheduling, and provides a multi-time-scale
new energy-
stored energy joint output optimization method and
system based on spot price, so as to solve the problems of poor
system operation stability and low
new energy regulation and control precision in the prior art. The method comprises the following steps: detecting a temperature change rate of a
composite phase change material in an energy charging and discharging process to determine a heat storage capability state of an
energy storage unit, and generating a day-ahead joint scheduling plan considering operation cost and a
new energy consumption rate in a coordinated optimization framework by combining day-ahead
electricity price data; constructing an
elastic matrix based on historical
electricity consumption data, correcting the
elastic matrix by using latest market information and a system state, and determining a load adjustment amount in combination with an intraday
electricity price; and based on the real-time
electricity price and the load adjustment amount, a
model prediction control algorithm is adopted to calculate real-time output adjustment instructions of the new energy unit and the
energy storage unit in a rolling manner, and the operation states of the two units are synchronously adjusted to realize collaborative optimization. The system operation stability and the new
energy regulation and control precision are improved.