Capacity optimization configuration method and device of heat-storage electric warming system

Abstract

The invention provides a capacity optimization configuration method and device of a heat-storage electric warming system. The capacity optimization configuration method comprises the steps of acquiring a wind abandoning rate of a power system; and solving a capacity optimization configuration model which is built in advance, and determining respective installation capacity of a heat exchanger device and an electrical heat exchange device and heat storage capacity of a heat storage device. The optimization on the respective installation capacity of the heat exchanger device and the electric heat exchange device in the heat-storage electric warming system and the heat storage capacity of the heat storage device is achieved, the wind power absorption capability is improved, and the economic cost is reduced; and moreover, the optimization on the respective installation capacity of the heat exchanger device and the electric heat exchange device in the heat-storage electric warming system and the heat storage capacity of the heat storage device can be achieved on the basis that the wind abandoning rate and the economic cost are reduced to a great extent, fixed heat based on power constraint of a cogeneration unit is loosen to the greatest extent, the wind power absorption flexibility of the power grid is improved, and the wind abandoning rate of the power grid in a warming period isgreatly reduced.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a capacity optimization configuration method and device for a heat storage electric heating system. Background technique [0002] During the winter heating period in the north, the combined heat and power unit operates in the "heat-constant power" operation mode, and the output of the unit needs to be maintained at a relatively high level for heating. Due to the limited electricity load, when the combined heat and power unit is maintained at a high level for a long time, the space for the power system to accept wind power is reduced, and the wind curtailment phenomenon is serious. [0003] During the winter heating period in the north, the combined heat and power unit operates in the "heat-constant power" operation mode, and the output of the unit needs to be maintained at a relatively high level for heating. Due to the limited electricity load, when the combined heat and ...

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Problems solved by technology

[0004] In order to overcome the deficiencies of poor wind power absorption capacity, high investment construction and high operating economic costs in the above-mentioned prior art, the present invention provides a method and device for optimizing the capacity configuration of a heat storage electric heating system, which first obtains the wind power system curtailment rate; Then solve the pre-built capacity optimal configuration model to determine the installed capacity of the heat exchanger device and the electric heat exchange device and the heat storage capacity of the heat storage device when the annual total economic cost of the heat storage electric heating system is the smallest; the capacity optimal configuration model includes The objective function and the corresponding constraints constructed with the goal of minimizing the annual total economic cost of the heat storage electric heating system. The constraints include power system constraints and thermal system constraints. , the present invention realizes the optimization of the installed capacity of the heat exchanger device and the electric heat exchange device and the heat storage capacity of the heat storage device in the heat storage electric heating system, improves the wind power consumption capacity, and reduces the investment construction and operation economy cost

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