Multilevel dynamic linkage type electricity purchasing transaction evaluation model

The invention discloses a multilevel dynamic linkage type electricity purchasing transaction evaluation model. According to the technical scheme of the invention, firstly, the electricity purchasing structure of a power grid company is divided. Secondly, the relevant indexes of the electricity purchasing transactions of the power grid company are collected and inputted and a constraint condition for the independent variables and the dependent variables of some indexes is set. Thirdly, according to data collected and input in the second step, the electricity purchasing types, the electricity purchasing sum, the electricity prices and the electric charge reference values of the electricity purchasing transactions are calculated. Fourthly, a constraint condition for the annual usage hourly adjustment amount of a thermal power transaction unit is determined. Fifthly, the adjustment values of independent variables are input. Sixthly, according to the electricity purchasing amount, the electricity price, the electr