Optimal calculation method of energy operating condition in iron mill, optimal calculation device of energy operating condition in iron mill, and running method of iron mill

Abstract

An optimal calculation method of an energy operating condition in an iron mill includes calculating, using a total energy operation cost of the iron mill within a predetermined period of time from a current time as an evaluation function, an operation condition of an energy facility in the iron mill as a decision variable such that a value of the evaluation function decreases, at each predetermined time within the predetermined period of time, based on actual values and estimated values of a generation amount and a used amount of energy utility for each of factories comprised in the iron mill. The method includes a step of calculating the decision variable by imposing an equality constraint such that the decision variable related to a power generation facility included in the energy facility is constant within a predetermined aggregation time.