Optimal dispatching method for power station containing coal-fired combined heat and power generation unit

Abstract

The invention discloses an optimal dispatching method for a power station containing a coal-fired combined heat and power generation unit, and the method comprises the steps: taking the minimum coal consumption of a power station level as an optimization target, adjusting the coal consumption of each unit through optimizing the electric heating load of each unit, enabling the coal consumption of a power station to be the minimum, and achieving the optimization target; the optimization method comprises the following optimization steps: reading scheduling related information, establishing an objective function by adopting a variable working condition theory, establishing an equality constraint condition according to an external load of the power station, establishing an inequality constraint condition according to safe operation domain data of each coal-fired combined heat and power generation unit in the power station, and establishing an optimization scheduling model according to the objective function and the constraint condition; and solving the model by adopting a multi-starting-point local search algorithm to obtain a scheduling scheme of each coal-fired combined heat and power generation unit in the power station. The coal consumption of the power station containing the coal-fired combined heat and power generation unit can be remarkably reduced, the operation economy of the power station is improved, and pollutant emission is reduced. The optimal scheduling method is simple to execute and easy to implement.

Description

technical field [0001] The invention belongs to the field of coal-fired power generation, and in particular relates to an optimal scheduling method for a power station containing a coal-fired cogeneration unit Background technique [0002] Combined heat and power generation can significantly improve energy utilization efficiency compared with separate heat and power generation. In the dispatching of power stations with coal-fired cogeneration units, coal-fired cogeneration units are often under variable operating conditions due to peak regulation tasks. Compared with the coal consumption of coal-fired cogeneration units under rated conditions, the coal consumption of coal-fired cogeneration units under variable working conditions is greatly increased. How to optimize the scheduling of power stations with coal-fired cogeneration units to reduce Coal consumption at the power station level is an urgent need for coal-fired power generation technology. In addition, in the past s...

AI Technical Summary

Problems solved by technology

In addition, in the past scheduling involving coal-fired cogeneration units, the calculation of coal consumption of coal-fired cogeneration units is a simple algebraic distribution of power, and the coal consumption is directly fitted as a linear or quadratic function of the load. This kind of fitting lacks the modeling of the real physical structure inside the coal-fired cogeneration unit and the mechanism explanation behind the model, especially the lack of detailed clarification on how the coal-fired cogeneration unit embodies the Rankine cycle mechanism in dispatching

Images